OPERATING INSTRUCTIONS
FOR
Mod e l OT-2
Oxyg e n
Tra nsm itte r Syste m
DANGER
HIGHLYTOXICANDORFLAMMABLELIQUIDSORGASESMAYBEPRESENTINTHISMONITORING
SYSTEM. PERSONALPROTECTIVEEQUIPMENTMAYBEREQUIREDWHENSERVICINGTHISSYSTEM.
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ECO: #99-0000
10/21/1999
ONLYAUTHORIZEDPERSONNELSHOULDCONDUCTMAINTENANCEAND/ORSERVICING. BEFORE
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Mod e l OT-2 Syste m
Ta b le of Conte nts
1 Introd uc tion
1.1 Ove rvie w ........................................................................ 1-1
1.2 Fe a ture s.......................................................................... 1-1
1.3 Typ ic a l Ap p lic a tio ns...................................................... 1-2
1.4 Op e ra to r Inte rfa c e ....................................................... 1-3
2 Op e ra tiona l The ory
2.1 Intro d uc tio n ................................................................... 2-1
2.2 Mic ro -Fue l Ce ll Se nso r .................................................. 2-2
2.2.1 Princ ip le s o f Op e ra tio n .......................................... 2-2
2.2.2 Ana to my o f a Mic ro -Fue l Ce ll............................... 2-2
2.2.3 Ele c tro c he m ic a l Re a c tio ns................................... 2-4
2.2.4 The Effe c t o f Pre ssure ............................................. 2-5
2.2.5 Ca lib ra tio n Cha ra c te ristic s ................................... 2-6
2.3 Ele c tro nic s a nd Sig na l Pro c e ssing ............................... 2-7
2.4 Oxyg e n Ce ll Blo c k He a te r............................................ 2-7
2.5 EMI/ RFI Pro te c tio n ......................................................... 2-7
2.5 Sa m p le Syste m .............................................................. 2-8
3 Op e ra tion
3.1 Insta lla tio n ...................................................................... 3-1
3.1.1 Unp a c king the Syste m ......................................... 3-1
3.1.2 Mo unting the Syste m ........................................... 3-2
3.1.3 Syste m Co nne c tio ns............................................. 3-3
3.1.3.1 Ga s Co nne c tio ns................................... 3-3
3.1.3.2 Ele c tric a l Co nne c tio ns.......................... 3-4
3.2 Insta lling the Mic ro -Fue l Ce ll ........................................ 3-6
3.3 Ca lib ra tio n ..................................................................... 3-6
3.3.1 Ca lib ra tio n Ga s Co nne c tio ns ............................. 3-6
3.3.2 Se tting the Sp a n .................................................... 3-8
3.3.3 H2S Sc rub b e r ......................................................... 3-9
3.3.4 Exha ust/ Ve nt Line .................................................. 3-9
3.4 Te sting the Syste m ......................................................... 3-9
4 Ma inte na nc e
4.1 Ro utine Ma inte na nc e .................................................. 4-1
4.2 Ce ll Re p la c e m e nt ......................................................... 4-1
4.2.1 Ce ll Wa rra nty ......................................................... 4-2
4.3 Sc rub b e r Re p la c e m e nt ............................................... 4-3
4.4 Filte r Se rvic ing ................................................................ 4-3
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Mod e l OT-2 Syste m
Ap p e nd ix
Sp e c ific a tio ns ........................................................................ A-1
Re c o m m e nd e d Sp a re Pa rts List .......................................... A-2
Dra wing List ............................................................................ A-2
Ma te ria l Sa fe ty Da ta She e t ................................................. A-3
The fo llo wing Inte rna tio na l Sym b o ls a re use d thro ug ho ut the
Instruc tio n Ma nua l fo r yo ur visua l a nd im m e d ia te wa rning s
a nd whe n yo u ha ve to a tte nd CAUTION while o p e ra ting the
instrum e nt:
GROUND
Prote c tive Ea rth
CAUTION, The o p e ra to r ne e d s to re fe r to the m a nua l
fo r furthe r info rm a tio n. Fa ilure to d o so m a y
c o m p ro m ise the sa fe o p e ra tio n o f the e q uip m e nt.
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Mod e l OT-2 Syste m
Introd uc tion 1
Introd uc tion
1.1
Ove rvie w
The Te le d yne Ana lytic a l Instrum e nts Mo d e l OT-2 Syste m is
d e sig ne d to a c c ura te ly m o nito r the o xyg e n c o nte nt in a wid e
va rie ty o f g a se s a t the p p m le ve l. The Tra c e Oxyg e n Tra nsm itte r
is e q uip p e d with two o xyg e n a na lysis ra ng e s, 0–10 p p m a nd 0–
100 p p m (0-100 p p m a nd 0-1000 p p m o p tio na l). The OT-2
Syste m is a c c e p ta b le fo r o p e ra tio n in Cla ss 1, Divisio n 2, Gro up s
B, C, a nd D ha za rd o us e nviro nm e nts, whe n use d in c o njunc tio n
with a no n-inse nd ive p o we r so urc e , suc h a s the Elsa g Ba ily To ta l
Flo w TM Syste m .
The he a rt o f the OT-2 Syste m is Te le d yne Ana lytic a l Instru-
m e nts' Mic ro -Fue l Ce ll o xyg e n se nso r. This c e ll is a se a le d e le c -
tro c he m ic a l d e vic e whic h tra nsla te s the a m o unt o f o xyg e n
p re se nt in a sa m p le into a n e le c tric a l c urre nt. Sinc e it is se a le d ,
the re is no e le c tro lyte to c ha ng e o r e le c tro d e s to c le a n a nd
the re fo re , virtua lly m a inte na nc e fre e .
The tra nsm itte r o p e ra te s fro m a 12VDC (no m ina l) p o we r
so urc e a nd p ro d uc e s a 1-5VDC vo lta g e o utp ut tha t is d ire c tly
a nd line a rly p ro p o rtio na l to the o xyg e n c o nc e ntra tio n. The
o utp ut vo lta g e is use d to inte rfa c e with hig h inp ut im p e d a nc e
(>10 Kilo o hm s) d e vic e s suc h a s re c o rd e rs, a la rm s, c o m p ute rs o r
o the r vo lta g e d rive n d e vic e s.
1.2
Fe a ture s
The fo llo wing fe a ture s d e sc rib e the b a sic m o d e l. The e xa c t
c o nfig ura tio n d e p e nd s o n the o p tio ns se le c te d a t the tim e o f
p urc ha se .
•
Two a na lysis ra ng e s: 0–10 p p m a nd 0-100 p p m (0-100
p p m a nd 0-1000 p p m o p tio na l) use r se le c ta b le
•
•
Hig h se nsitivity (0.5% FS)
Dig ita l O 2 c o nc e ntra tio n d isp la y
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1 Introd uc tion
Mod e l OT-2 Syste m
•
Ac c ura te (±2% o f full sc a le a t c o nsta nt te m p e ra ture o n
100 p p m , o r 1000 p p m sc a le ; ±1 p p m o n 0–10 p p m sc a le
a t c o nsta nt te m p e ra ture )
Inse nsitive to flo w va ria tio ns
Fa st re sp o nse a nd re c o ve ry
•
•
•
Lo ng life , m a inte na nc e -fre e Mic ro -Fue l Ce ll o xyg e n
se nso r
•
•
•
•
•
•
•
•
•
•
Una ffe c te d b y re d uc ing a g e nts (HC's, CO, SO2, e tc .)
Ea sy to c a lib ra te , no ze ro g a s re q uire d
12VDC Ba tte ry Po we re d w/ 1-5 VDC Outp ut
Rug g e d NEMA 4, b ulkhe a d m o unte d e nc lo sure
Sta inle ss Ste e l sa m p le syste m (nylo n c e ll ho ld e r)
H2S sc rub b e r
Pre ssure re g ula tio n with g a g e
Sa m p le filte r
Flo wm e te r
He a te d c e ll ho ld e r a sse m b ly
1.3
Typ ic a l Ap p lic a tions
Altho ug h the OT-2 Syste m is d e sig ne d in c o njunc tio n with the
TM
Elsa g Ba ily To ta l Flo w
Syste m fo r na tura l g a s p ro d uc tio n, it a lso is
c a p a b le o f m o nito ring o xyg e n a t the p p m le ve l in a va rie ty o f
g a se s. A fe w typ ic a l a p p lic a tio ns inc lud e :
•
•
•
•
•
•
•
•
•
Ga s g a the ring a nd tra nsp o rta tio n
Mo nito ring ine rt g a s b la nke ting
Air se p a ra tio n a nd liq ue fa c tio n
Che m ic a l fe e d sto c k a na lysis
Pe tro c he m ic a l p ro c e ss c o ntro l
He a t tre a ting a nd b rig ht a nne a ling p ro c e sse s
Qua lity a ssura nc e
Ga s c e rtific a tio n
We ld ing a p p lic a tio ns
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Mod e l OT-2 Syste m
Introd uc tion 1
1.4
Op e ra tor Inte rfa c e
The OT-2 Syste m is ho use d in a rug g e d m e ta l NEMA-4 c a se
with the d isp la y visib le fro m the fro nt a nd the c o ntro ls a c c e ssib le
fro m insid e the fro nt d o o r. Se e Fig ure 1-1. The fro nt d o o r ha s a
c le a r Le xa n wind o w fo r vie wing the sa m p le syste m c o m p o ne nts
a nd tra nsm itte r d isp la y.
Figure 1-1 Front View
Ac c e ss Door: Fo r a c c e ss to the Mic ro -Fue l Ce ll a nd tra nsm it-
te r c o ntro ls, the fro nt d o o r swing s o p e n whe n the slo tte d la tc h in
the m id d le rig ht sid e o f the d o o r is turne d c o unte r-c lo c kwise . The
re p la c e a b le Mic ro Fue l Ce ll is ho use d in a nylo n c e ll b lo c k p o si-
tio ne d fo r e a sy a c c e ss.
OT-2 Ele c tronic s & Disp la y: The OT-2 m e te r d isp la y is a LCD
d e vic e tha t p ro d uc e s 3.5 d e c im a l, 7-se g m e nt num b e rs tha t a re
le g ib le in d a ylig ht. It p ro d uc e s a c o ntinuo us re a d o ut o f o xyg e n
c e nc e ntra tio n. Ac c e ssing the tra nsm itte r e le c tro nic s re q uire s
unfa ste ning the sc re ws o f the tra nsp a re nt fro nt c o ve r o f the OT-2
a nd lifting the c o ve r o ff.
Flowm e te r: Mo nito rs the flo w o f g a s p a st the se nso r. Re a d o ut
is 0.1-1 sta nd a rd c ub ic fe e t p e r ho ur (sc fh).
H2S Sc rub b e r: The H2S sc rub b e r p re ve nts H2S g a s fro m a ffe c t-
ing the o xyg e n se nso r.
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1 Introd uc tion
Mod e l OT-2 Syste m
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Mod e l OT-2 Syste m
Op e ra tiona l The ory 2
Op e ra tiona l The ory
2.1
Introd uc tion
The OT-2 Syste m is c o m p o se d o f thre e sub syste m s:
1. Mic ro -Fue l Ce ll Se nso r
2. Ele c tro nic Sig na l Pro c e ssing , Disp la y a nd Co ntro l
3. Sa m p le Syste m
The Mic ro -Fue l Ce ll is a n e le c tro c he m ic a l g a lva nic d e vic e
tha t tra nsla te s the a m o unt o f o xyg e n p re se nt in the sa m p le into a n
e le c tric a l o utp ut.
The e le c tro nic sig na l p ro c e ssing , d isp la y a nd c o ntro l sub -
syste m p ro vid e s o xyg e n c o nc e ntra tio n info rm a tio n b o th visua lly
a nd e le c tro nic a lly.
The sa m p le syste m a c c e p ts the sa m p le g a s a nd re m o ve s the
H2S in the sa m p le p rio r to intro d uc tio n to the se nso r.
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2 Op e ra tiona l The ory
Mod e l OT-2 Syste m
2.2
Mic ro-Fue l Ce ll Se nsor
2.2.1 Princ ip le s of Op e ra tion
The o xyg e n se nso r use d in the Mo d e l OT-2 Syste m is a Mic ro -
fue l Ce ll d e sig ne d a nd m a nufa c ture d b y Ana lytic a l Instrum e nts. It
is a se a le d p la stic d isp o sa b le e le c tro c he m ic a l tra nsd uc e r.
The ke y c o m p o ne nts o f the Mic ro -Fue l Ce ll a re a d iffusio n
b a rrie r in the fo rm o f a thin m e m b ra ne , a c a tho d e , a n a no d e , a nd
a n e le c tro lyte in whic h the y a re im m e rse d .
Oxyg e n fro m the sa m p le g a s d iffuse s thro ug h the thin m e m -
b ra ne a nd is re d uc e d a t the c a tho d e . As a re sult, a n e le c tric a l
c urre nt is p ro d uc e d tha t is p ro p o rtio na l to the c o nc e ntra tio n o f
o xyg e n in the sa m p le g a s.
The c ho ic e o f e le c tro lyte , a nd he nc e the se nso r typ e , d e -
p e nd s o n the e xa c t c o nstitue nts o f the sa m p le g a s. Fo r sa m p le
g a se s tha t c o nta in a hig h c o nc e ntra tio n o f CO2, fo r e xa m p le , a n
a c id e le c tro lyte will b e the m o re o p tim a l c ho ic e .
2.2.2 Ana tom y of a Mic ro-Fue l Ce ll
The Mic ro -fue l Ce ll is a p p ro xim a te ly 1¼ inc he s in d ia m e te r.
The c e ll b o d y is m a d e o f a n ine rt p la stic tha t is c o m p a tib le with a
wid e va rie ty o f sa m p le stre a m s. Oxyg e n fro m the sa m p le g a s
d iffuse s thro ug h a thin m e m b ra ne lo c a te d a t o ne e nd o f the
se nso r. The o the r e nd o f the c e ll is a c o nta c t p la te c o nsisting o f
two c o nc e ntric fo il ring s. The ring s m a te with sp ring -lo a d e d c o n-
ta c ts in the se nso r b lo c k a sse m b ly a nd p ro vid e the e le c tric a l
c o nne c tio n to the re st o f the a na lyze r. Fig ure 2-1 illustra te s the
e xte rna l fe a ture s.
Figure 2-1: Micro-Fuel Cell
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Mod e l OT-2 Syste m
Op e ra tiona l The ory 2
Re fe r to Fig ure 2-2, Cro ss Se c tio n o f a Mic ro -Fue l Ce ll, whic h
illustra te s the fo llo wing inte rna l d e sc rip tio n.
Fig ure 2-2. Cro ss Se c tio n o f a Mic ro -Fue l Ce ll (no t to sc a le )
At the to p e nd o f the c e ll is a d iffusio n m e m b ra ne o f Te flo n.
Be ne a th the d iffusio n m e m b ra ne lie s the o xyg e n se nsing e le -
m e nt—the c a tho d e .
The a no d e p ro vid e s the e le c tric a l d riving fo rc e fo r the re d uc -
tio n o f o xyg e n a t the c a tho d e .
At the re a r o f the c e ll, just b e lo w the a no d e struc ture , is a
fle xib le m e m b ra ne d e sig ne d to a c c o m m o d a te the inte rna l vo l-
um e c ha ng e s tha t o c c ur thro ug ho ut the life o f the c e ll. This fle xib il-
ity a ssure s tha t the se nsing m e m b ra ne re m a ins in its p ro p e r p o si-
tio n, ke e p ing the e le c tric a l o utp ut c o nsta nt.
The e ntire sp a c e b e twe e n the d iffusio n m e m b ra ne , a b o ve the
c a tho d e , a nd the fle xib le re a r m e m b ra ne , b e ne a th the a no d e , is
fille d with e le c tro lyte . Ca tho d e a nd a no d e a re sub m e rg e d in this
c o m m o n p o o l. The y e a c h ha ve a c o nd uc to r c o nne c ting the m to
o ne o f the e xte rna l c o nta c t ring s o n the c o nta c t p la te , whic h is o n
the b o tto m o f the c e ll.
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2 Op e ra tiona l The ory
Mod e l OT-2 Syste m
2.2.3 Ele c troc he m ic a l Re a c tions
The sa m p le g a s d iffuse s thro ug h the Te flo n m e m b ra ne . Fo r a
se nso r tha t e m p lo ys KOH a s e le c tro lyte , o xyg e n in the sa m p le g a s
is re d uc e d o n the surfa c e o f the c a tho d e a c c o rd ing to the fo llo w-
ing HALF REACTION:
O 2 + 2H2O + 4e – ® 4OH–
(c a tho d e )
(Fo ur e le c tro ns c o m b ine with o ne o xyg e n m o le c ule —in the
p re se nc e o f wa te r fro m the e le c tro lyte —to p ro d uc e fo ur hyd ro xyl
io ns.)
Whe n the o xyg e n is re d uc e d a t the c a tho d e , le a d is sim ulta -
ne o usly o xid ize d a t the a no d e b y the fo llo wing HALF REACTION:
Pb + 2OH– ® Pb +2 + H2O + 2e –
(a no d e )
(Two e le c tro ns a re tra nsfe rre d fo r e a c h a to m o f le a d tha t is
o xid ize d . The re fo re it ta ke s two o f the a b o ve a no d e re a c tio ns to
b a la nc e o ne c a tho d e re a c tio n a nd tra nsfe r fo ur e le c tro ns.)
The e le c tro ns re le a se d a t the surfa c e o f the a no d e flo w to the
c a tho d e surfa c e whe n a n e xte rna l e le c tric a l p a th is p ro vid e d . The
c urre nt is p ro p o rtio na l to the a m o unt o f o xyg e n re a c hing the
c a tho d e . It is m e a sure d a nd use d to d e te rm ine the o xyg e n c o n-
c e ntra tio n in the g a s m ixture .
The o ve ra ll re a c tio n fo r the fue l c e ll is the SUM o f the ha lf
re a c tio ns a b o ve , o r:
2Pb + O2 ® 2Pb O
(The se re a c tio ns will b e the d o m ina nt se nso r c urre nt c o m p o -
ne nt a s lo ng a s no g a se o us c o m p o ne nts c a p a b le o f o xid izing
le a d —suc h a s io d ine , b ro m ine , c hlo rine a nd fluo rine —a re p re se nt
in the sa m p le .)
In the a b se nc e o f o xyg e n, the o utp ut o f the se nso r is a p p ro xi-
m a te ly ze ro .
Wa rning :The se nsor use d in the Mod e l OT-2 Syste m use s e le c tro-
lyte s whic h c onta in sub sta nc e s tha t a re ha rm ful if
touc he d , swa llowe d , or inha le d . Avoid c onta c t with
ANY fluid or p owd e r in or a round the unit. Wha t m a y
a p p e a r to b e p la in wa te r c ould c onta in one of the se
ha rm ful sub sta nc e s. In c a se of e ye c onta c t, im m e d i-
a te ly flush e ye s with wa te r for a t le a st 15 m inute s. Ca ll
p hysic ia n. (Se e Ap p e nd ix - Ma te ria l Sa fe ty Da ta She e t
(MSDS)).
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Mod e l OT-2 Syste m
Op e ra tiona l The ory 2
2.2.4 The Effe c t of Pre ssure
The Mic ro -Fue l Ce ll re sp o nd s to the p a rtia l p re ssure o f o xyg e n
p re se nt insid e the c e ll ho ld e r.
By d e sig n, the to ta l g a s p re ssure insid e the c e ll ho ld e r is ke p t
a p p ro xim a te ly the sa m e a s the a tm o sp he ric p re ssure . As the
a tm o sp he ric p re ssure c ha ng e s, the p a rtia l p re ssure o f o xyg e n in
the c e ll ho ld e r will c ha ng e a c c o rd ing ly.
The im p a c t d ue to c ha ng e s in a tm o sp he ric p re ssure is usua lly
lim ite d to le ss tha n 3% o f re a d ing .
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2 Op e ra tiona l The ory
Mod e l OT-2 Syste m
2.2.5 Ca lib ra tion Cha ra c te ristic s
Give n tha t the to ta l p re ssure o f the sa m p le g a s o n the surfa c e
o f the Mic ro -Fue l Ce ll inp ut is c o nsta nt, a c o nve nie nt c ha ra c te ris-
tic o f the c e ll is tha t the c urre nt p ro d uc e d in a n e xte rna l c irc uit is
d ire c tly p ro p o rtio na l to the ra te a t whic h o xyg e n m o le c ule s re a c h
the c a tho d e , a nd this ra te is d ire c tly p ro p o rtio na l to the c o nc e n-
tra tio n o f o xyg e n in the g a se o us m ixture . In o the r wo rd s it ha s a
line a r c ha ra c te ristic c urve , a s sho wn in Fig ure 2-3. Me a suring
c irc uits d o no t ha ve to c o m p e nsa te fo r no nline a ritie s.
In a d d itio n, sinc e the se nso r o utp ut is a p p ro xim a te ly ze ro in the
a b se nc e o f o xyg e n, the c ha ra c te ristic c urve ha s c lo se to a n
a b so lute ze ro (within ± 1 p p m o xyg e n o r b e tte r, d e p e nd ing o n the
se nso r typ e a nd m o d e l). In p ra c tic a l a p p lic a tio n, ze ro ing m a y still
b e use d to c o m p e nsa te fo r the c o m b ine d ze ro o ffse ts o f the c e ll
a nd the e le c tro nic s.
Fig ure 2-3. Cha ra c te ristic Inp ut/ Outp ut Curve fo r a Mic ro -Fue l Ce ll
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Mod e l OT-2 Syste m
Op e ra tiona l The ory 2
2.3
Ele c tronic s a nd Sig na l Proc e ssing
The OT-2 c irc uitry c o nsists o f thre e sta g e s: a n inp ut sta g e , a
te m p e ra ture c o m p e nsa tio n/ g a in sta g e a nd a n o utp ut sta g e .
The inp ut sta g e c o nsists o f a c urre nt to vo lta g e c o nve rte r
p ro d uc ing a vo lta g e sig na l tha t is p ro p o rtio na l to the o xyg e n
c o nc e ntra tio n a s d e te c te d b y the se nso r.
The te m p e ra ture c o m p e nsa tio n sta g e c o nta ins c irc uitry tha t
c o m p e nsa te s fo r the te m p e ra ture e ffe c ts o n the o utp ut c urre nt o f
the O2 c e ll. A the rm isto r m o unte d in the se nso r a sse m b ly m o nito rs
the se nso r te m p e ra ture .
The o utp ut sta g e p ro vid e s a 1-5 vo lt sig na l into a lo a d >10K
o hm s c o rre sp o nd ing to 0-100% o f full sc a le o f the se le c te d ra ng e .
The tra nsm itte r c irc uitry o p e ra te s with a p o we r sup p ly vo lta g e
ra ng e o f 9-16 VDC. It is re c o m m e nd e d tha t the o utp ut c a b le b e
no lo ng e r tha n 10 fe e t. A shie ld e d c a b le sho uld b e use d whe n-
e ve r p o ssib le to m inim ize e le c tric a l no ise p ic kup .
2.4
Oxyg e n Ce ll Bloc k He a te r
The OT-2 syste m is e q uip p e d with a n insula te d a nd e le c tric a lly
he a te d c e ll b lo c k. The he a te r is switc he d o n whe n the e nc lo sure
te m p e ra ture d ip s b e lo w 1oC. The 3 wa tt he a te r is c o ntro lle d b y the
e le c tro nic c o ntro l unit.
Note : The c e ll b loc k insula tion m ust b e in p la c e for the
he a te r syste m to b e e ffe c tive .
2.5
EMI/ RFIProte c tion
The OT-2 Syste m is we ll shie ld e d fro m EMI/ RFI. The tra nsm itte r
e le c tro nic s a re m o unte d within a g ro und e d m e ta llic e nc lo sure ,
a nd the e le c tro nic s is ho use d within the m a in syste m e nc lo sure . Fo r
o p tim a l tra nsm itte r p e rfo rm a nc e , the m a in syste m e nc lo sure
sho uld b e we ll g ro und e d .
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2 Op e ra tiona l The ory
Mod e l OT-2 Syste m
2.6
Sa m p le Syste m
The syste m c o nsists o f a shut o ff va lve , p a rtic ula te filte r, p re s-
sure re g ula to r, sc rub b e r, c a lib ra tio n se le c to r va lve , flo w c o ntro l
va lve , O2 tra nsm itte r a nd a sa m p le flo w m e te r a nd inc o rp o ra te s ¼
inc h tub e fitting s fo r sa m p le inle t a nd o utle t c o nne c tio ns a t the
sid e o f the e nc lo sure .
H2S fro m the sa m p le g a s c a n d iffuse into the Mic ro -Fue l Ce ll
le a d ing to the fo rm a tio n o f le a d sulp hid e with the a no d e m a te ria l.
To e lim ina te the d e le te rio us e ffe c t o f H2S o n the se nso r, the sc rub -
b e r is fille d with Pura fil®.
Sa m p le Flow De sc rip tion: (Se e Fig ure 2-4)
1. The sa m p le e nte rs the tra nsm itte r syste m via the shut o ff va lve
a t 6-40 p sig a nd p a sse s thro ug h the filte r whe re p a rtic ula te s, to
90 m ic ro ns, a re tra p p e d .
2. A p re ssure re g ula to r, whic h ha s b e e n p re se t a t the fa c to ry to
a p p ro xim a te ly 5 p sig e nsure s a c o nsta nt g a s flo w to the se nso r.
3. Afte r the p re ssure re g ula to r, the sa m p le g a s p a sse s thro ug h the
sc rub b e r to the c a lib ra tio n se le c to r va lve .
4. Whe n the sa m p le ha s b e e n se le c te d , it flo ws thro ug h the flo w
c o ntro l va lve to the O2 se nso r.
5. Fina lly, the sa m p le flo ws thro ug h the flo w m e te r a nd e xits the
syste m thro ug h the ve nt line to a sa fe a re a a t a tm o sp he ric
p re ssure .
No te :
The flow c ontrol va lve should b e a d juste d until the
flow m e te r ind ic a te s a flow ra te of 0.4 sc fh.
H2S
SCRUBBER
FLOWMETER
.1-1.0 SCFH
SAMPLE IN
FILTER
6-40 PSIG
VENT TO
ATMOSPHERE
PRESSURE
(SAFE AREA)
O2 XMTR
0-10 PPM
SPAN GAS IN
Fig ure 2-4 Flo w Dia g ra m
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Mod e l OT-2 Syste m
Op e ra tiona l The ory 2
Fig ure 2-5 Pip ing La yo ut
Fig ure 2-5 is the Pip ing La yo ut o f the sa m p ling syste m . In the
sta nd a rd instrum e nt, c a lib ra tio n g a se s (ze ro a nd sp a n) a re c o n-
ne c te d d ire c tly to the Sp a n G a s In p o rt b y te e ing to the p o rt with
a p p ro p ria te va lve s. The sa m p le g a s is c o nne c te d to the Sa m p le
Ga s In p o rt in the sa m e m a nne r a s the Sp a n Ga s.
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2 Op e ra tiona l The ory
Mod e l OT-2 Syste m
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Mod e l OT-2 Syste m
Op e ra tion 3
Op e ra tion
Op e ra tio n o f the Mo d e l OT-2 Syste m invo lve s insta lling the unit,
m a king a p p ro p ria te sa m p le g a s c o nne c tio ns, a nd c a lib ra tio n.
3.1 Insta lla tio n
WARNING: Safe operation of the system requires the user to
properly ground the system, install the wiring and
power the transmitter.
It is the user's responsibility to determine and in-
stall, should a safety barrier be required.
Insta lla tion of the Mod e l OT-2 Syste m inc lud e s:
1. Unp a c king
2. Mo unting
3. Ga s c o nne c tio ns
4. Ele c tric a l c o nne c tio ns
5. Insta lling the Mic ro -Fue l Ce ll
6. Te sting the syste m .
3.1.1 Unp a c king the Ana lyze r
Ca re fully unp a c k the a na lyze r a nd insp e c t it fo r d a m a g e .
Im m e d ia te ly re p o rt a ny d a m a g e to the ship p ing a g e nt.
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3 Op e ra tion
Mod e l OT-2 Syste m
3.1.2 Mounting the Ana lyze r
The OT-2 Syste m is d e sig ne d fo r b ulkhe a d m o unting . Fig ure 3-1
is a n illustra tio n o f the OT-2 Syste m a nd m o unting ho le d im e nsio ns.
The re a re fo ur m o unting ho le s—o ne in e a c h o f the insid e c o rne rs
o f the rig id e nc lo sure .
Fig ure 3-1 Mo unting De ta ils
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Mod e l OT-2 Syste m
Op e ra tion 3
All o p e ra to r c o ntro ls a re lo c a te d insid e the syste m e nc lo sure ,
whic h is hing e d o n the le ft e d g e a nd p ro vid e s e a sy a c c e ss to the
tra nsm itte r, se nso r a nd c e ll b lo c k insid e the instrum e nt. The m a in
e nc lo sure d o o r will swing o p e n whe n the slo tte d la tc h a t the rig ht
c e nte r o f the d o o r is turne d c o unte r-c lo c kwise . Allo w c le a ra nc e
fo r the d o o r to o p e n in a 90-d e g re e a rc a t a ra d ius o f 16 inc he s.
Se e Fig ure 3-1.
3.1.3 Syste m Conne c tions
Fig ure 3-2 sho ws the Mo d e l OT-2 Syste m . The re a re p o rts fo r
g a s inle t a nd o utle t, p o we r a nd a na lo g c o nc e ntra tio n o utp ut.
Figure 3-2 Front View of OT-2 System
3.1.3.1 Gas Connections
1
The unit is m a nufa c ture d with /
insta lla tio ns.
4
inc h tub e fitting s fo r syste m
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3 Op e ra tion
Mod e l OT-2 Syste m
To c o nne c t g a s line s to the Mo d e l OT-2 Syste m :
1. Inse rt the tub e into the tub e fitting , a nd fing e r-tig hte n the
nut until the tub ing c a nno t b e ro ta te d fre e ly, b y ha nd , in
the fitting . (This m a y re q uire a n a d d itio na l 1/ 8 turn
b e yo nd fing e r-tig ht.)
2. Ho ld the fitting b o d y ste a d y with a wre nc h, a nd with
a no the r wre nc h ro ta te the nut a no the r 1-1/ 4 turns.
All g a s c onne c tions, Sa m p le In, Sa m p le Re turn a nd Sp a n Ga s
In a re m a d e a t the c onne c tors loc a te d on the le ft sid e of the
syste m e nc losure a s shown in Fig ure 3-2.
SAMPLE IN: The g a s c o nne c tio n fo r the sa m p le is m a d e a t the
SAMPLE IN c o nne c to r.
The inte rna l g a s p re ssure re g ula to r is fa c to ry p re se t to a p p ro xi-
m a te ly 3 p sig whic h will ke e p the syste m flo wm e te r re a d ing in a n
a c c e p ta b le ra ng e (0.1-1 sc fh). The sa m p le in p re ssure c a n b e 6-40
p sig .
SAMPLE RETURN: Exha ust c o nne c tio ns m ust b e c o nsiste nt with
the ha za rd le ve l o f the c o nstitue nt g a se s. Che c k Lo c a l, Sta te , a nd
Fe d e ra l la ws, a nd e nsure tha t the e xha ust stre a m ve nts to a n
a p p ro p ria te ly c o ntro lle d a re a if re q uire d .
SPAN GAS IN: This is the p o rt fo r inp utting sp a n g a s a nd ze ro
g a s. The sp a n g a s so urc e sho uld b e re g ula te d a t 3 p sig .
3.1.3.2 Ele c tric a l Conne c tions
All e le c tric a l c o nne c tio ns fo r the OT-2 Syste m a re m a d e o n a
te rm ina l b lo c ks in the tra nsm itte r b o x lo c a te d o n the insid e o f the
syste m e nc lo sure , se e Fig ure 3-3.
1. To a c c e ss the te rm ina l b lo c k re m o ve the fo ur sc re ws
se c uring the tra nsm itte r b o x c o ve r a nd re m o ve it.
2. Co nne c t the 4 wire s a nd shie ld to the te rm ina l b lo c k a s
sho wn in Fig ure 3-4.
3. Re p la c e the c o ve r a nd sc re ws.
Fo r sa fe c o nne c tio ns, e nsure tha t no uninsula te d wire e xte nd s
o utsid e o f the c o nne c to rs the y a re a tta c he d to . Strip p e d wire
e nd s m ust inse rt c o m p le te ly into te rm ina l b lo c ks. No uninsula te d
wiring sho uld b e a b le to c o m e in c o nta c t with fing e rs, to o ls o r
c lo thing d uring no rm a l o p e ra tio n.
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Mod e l OT-2 Syste m
Op e ra tion 3
Transmitter Cover
Screws (4 places)
Display
Electrical
Connections
To Sensor
Span
Fig ure 3-3 Fro nt Vie w o f Tra nsm itte r
Syste m Powe r Re q uire m e nts:
The Mo d e l OT-2 Syste m re q uire s a 12 VDC (no m ina l), re ve rse
p o la rity p ro te c te d p o we r so urc e .
Ob se rve g ood wiring p ra c tic e s. For ha za rd ous a re a
a p p lic a tions, the Mod e l OT-2 Syste m m ust b e p ow-
e re d b y a sourc e tha t is c onsiste nt with intrinsic a lly
sa fe op e ra tion.
Ana log Outp uts:
1-5 VDC: Vo lta g e inc re a se s line a rly with inc re a sing o xyg e n,
fro m 1 VDC a t 0 p p m to 5 VDC a t full sc a le p p m .
Fig ure 3-4: Tra nsm itte r Ele c tric a l Co nne c tio ns
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3 Op e ra tion
Mod e l OT-2 Syste m
3.2 Insta lling the Mic ro-Fue l Ce ll
The Mic ro -Fue l Ce ll is no t insta lle d in the c e ll b lo c k whe n the
instrum e nt is ship p e d . Insta ll it b e fo re the a na lyze r is p la c e d in
se rvic e .
Whe n the m ic ro -Fue l Ce ll ne e d s to b e insta lle d o r re p la c e d ,
fo llo w the p ro c e d ure s in c ha p te r 5, Ma inte na nc e , fo r re m o ving
a nd insta lling c e lls.
Re c om m e nd a tion: During insta lla tion, m inim ize the tim e the
se nsor is e xp ose d to a tm osp he ric oxyg e n, i.e . the tim e b e twe e n
re m ova l of the se nsor from the se a le d b a g to insta lla tion into the
c e ll hold e r.
3.3 Ca lib ra tio n
The c a lib ra tio n p ro c e ss c o nsists o f:
•
•
Co nne c ting sp a n g a s to Sp a n In Po rt
Se tting the sp a n
Se tting the sp a n o f the tra nsm itte r re q uire s a d justm e nt o f the
p ote ntiome te r loc a te d on the tra nsmitte r b ox.
The se nso r will re sp o nd to c ha ng e s in o xyg e n c o nc e ntra tio n
im m e d ia te ly a fte r insta lla tio n. Fo r m a xim um p e rfo rm a nc e (a c c u-
ra c y a nd se nsitivity) TET/ AI re c o m m e nd s tha t the se nso r b e p urg e d
with a ze ro (0% o xyg e n) g a s fo r a b o ut 24 ho urs a fte r the se nso r is
insta lle d a nd the n c a lib ra te with sp a n g a s with a va lue o f a p p ro x.
80-100% o f the a na lytic a l ra ng e o f inte re st. The fo llo wing se c tio ns
d e sc rib e the c a lib ra tio n p ro c e d ure .
3.3.1
Ca lib ra tion Ga s Conne c tions
Prio r to insta lla tio n o f the O2 c e ll, a ze ro g a s (p urg e g a s) c o n-
ta ining le ss tha n 1 p p m O2, sho uld b e c o nne c te d to the syste m
a nd b e re a d y to p urg e the O2 c e ll. To fa c ilita te sp a nning the ze ro
a nd sp a n g a s so urc e c a n b e c o nne c te d to a c o m m o n m a nifo ld
via a thre e wa y va lve . This m a nifo ld the n c o nne c ts d ire c tly to the
"Sp a n Ga s In" p o rt o n the syste m (Fig . 3-5). It is im p orta nt tha t the
op e ra tor b le e d s a ny tra p p e d a ir in the tub ing p rior to insta lla tion
of the se nsor to m inim ize the a m ount of a tm osp he ric oxyg e n
introd uc e d into the syste m .
NOTE: In ord e r to m inim ize the tim e re q uire d to p urg e the c e ll
a fte r e xp osure to a ir, lim it the tim e the c e ll is e xp ose d to
a ir to 1 m inute or le ss, if p ossib le .
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Mod e l OT-2 Syste m
Op e ra tion 3
The sp a n g a s c ylind e r m ust b e e q uip p e d with a p re ssure
re g ula to r with a m e ta llic d ia p hra g m . The re g ula to r sho uld b e se t to
a p p ro xim a te ly 3-5 p sig . Ro ta te the se le c to r va lve (a ) to the sp a n
p o sitio n a nd o b se rve the flo w m e te r (b ) whic h sho uld ind ic a te a
flo w o f a b o ut 0.4 sc fh. Fo r c a lib ra tio n p urp o se s the flo w c a n b e
inc re a se d to a s m uc h a s 1 sc fh in o rd e r to re d uc e the tim e re -
q uire d to sta b ilize .
Allo w the sp a n g a s to p a ss thro ug h the O2 se nso r until the
re a d ing ha s sta b ilize d (a p p ro x. 10 m in.). The O2 tra nsm itte r c a n
the n b e a d juste d (se e instruc tio ns e lse whe re in this se c tio n) to
m a tc h the a na lyze d c o nte nt o f the sp a n g a s. Whe n the c a lib ra tio n
is c o m p le te , re turn the se le c to r va lve (a ) to the sa m p le p o sitio n
a nd re a d just the flo w va lve (c ), (if ne c e ssa ry) so tha t flo w m e te r
(b ) re a d s 0.4 sc fh.
Figure 3-5 Sample System Component Locations
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3 Op e ra tion
Mod e l OT-2 Syste m
NOTE: This procedure is more critical on the 0-10 ppm range and
less critical on the 0-100 or 0-1000 ppm range.
3.3.2 Se tting the Sp a n Pot
1. Switc h the syste m fro m ze ro g a s to sp a n g a s a nd a llo w
tim e fo rsta b iliza tio n.
Display
Span
Span Pot
Figure 3-6: Span Pot Location
NOTE: The span gas should have an O2 concentration of 80% -
100% of full scale. For example, if the range is set at 0-100
ppm, the span gas should be a certified grade gas of
about 90 ppm O2 in N2 or Argon.
2. If 90 p p m g a s is use d , a d just the sp a n p o t (Fig ure 3-6)
to re a d 90.0 p p m o n the LCD d isp la y. The o utp ut to
the Elsa g Ba ily To ta l Flo w TM c o m p ute r will ha ve a
sig na l o f 4.6VDC (into a >10K o hm lo a d ).
The fo rm ula fo r this is:
Span Gas % F.S. x 4
+ =
1
Output in VDC
100
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Mod e l OT-2 Syste m
Op e ra tion 3
3.3.3 H2S Sc rub b e r
The life e xp e c ta nc y o f the sta inle ss ste e l H2S sc rub b e r, in-
c lud e d in this syste m , is d e te rm ine d b y the a m o unt o f H2S p a ssing
thro ug h it.
With the m a xim um c o nc e ntra tio n o f 200 PPM H2S a nd a flo w
ra te o f 0.2 sc fh the e xp e c te d sc rub b e r life will b e o ve r 6 m o nths
with Purifil® a nd o ve r 11 m o nths with Purifil® II.
This sc rub b e r life e xp e c ta nc y inc re a se s with lo we r H2S c o n-
c e ntra tio n o r g a s sa m p le flo w ra te s. It is re c o m m e nd e d tha t the
flo w ra te b e se t no hig he r tha n 0.4 sc fh initia lly. The flo w ra te
sho uld b e inc re a se d o nly if a fa ste r syste m re sp o nse tim e is d e -
sire d .
It is sug g e ste d tha t a sp a re sc rub b e r b e ke p t o n ha nd a nd
re p la c e d e ve ry 6 m o nths. Whe n the sc rub b e r ne e d s to b e re -
p la c e d , fo llo w the p ro c e d ure in se c tio n 4, Ma inte na nc e , "Sc rub -
b e r Re p la c e m e nt".
WARNING: IF SCRUBBER IS NOT PROPERLY MAINTAINED THE
O2 SENSOR LIFE WILL BE SHORTENED.
3.3.4 Exha ust/ Ve nt Line (Sa m p le Re turn)
It is re c o m m e nd e d tha t a lo ng ve nt line (a p p ro x. 4 ft.) b e
insta lle d to the "Sa m p le Re turn" c o nne c to r a t the sid e o f the sys-
te m e nc lo sure . The e xte nd e d ve nt line will m inim ize b a c k d iffusio n
fro m the a tm o sp he re b a c k to the se nso r. The m inim um re c o m -
m e nd e d tub ing d ia m e te r is 1/ 4" to m inim ize b a c k p re ssure .
3.4 Te sting the Syste m
Be fo re c o nne c ting the instrum e nt into the p o we r so urc e :
•
Che c k the inte g rity a nd a c c ura c y o f the g a s
c o nne c tio ns. Ma ke sure the re a re no le a ks.
•
Che c k the inte g rity a nd a c c ura c y o f the e le c tric a l
c o nne c tio ns. Ma ke sure the re a re no e xp o se d
c o nd uc to rs.
•
•
Che c k tha t inle t sa m p le p re ssure is within the
a c c e p ta b le ra ng e (se e se c tio n 3.3.1).
Po we r up the syste m , a nd te st it.
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Model OT-2 System
Maintenance
4
Maintenance
4.1
Routine Ma inte na nc e
Asid e fro m no rm a l c le a ning a nd c he c king fo r le a ks a t the g a s
c o nne c tio ns, ro utine m a inte na nc e inc lud e s se rvic ing the filte r, the
sc rub b e r, insta lling re p la c e m e nt Mic ro -Fue l c e lls a nd re c a lib ra tio n.
Fo r re c a lib ra tio n, se e se c tio n 3.3 Ca lib ra tio n.
4.2
Ce ll Re p la c e m e nt
The Mic ro -Fue l Ce ll is a se a le d e le c tro c he m ic a l tra nsd uc e r
with no e le c tro lyte to c ha ng e o r e le c tro d e s to c le a n. Whe n the
c e ll re a c he s the e nd o f its use ful life , it is re p la c e d . The sp e nt fue l
c e ll sho uld b e d isc a rd e d a c c o rd ing to lo c a l re g ula tio ns.
The c ha ra c te ristic s o f the Mic ro -Fue l Ce ll a re sim ila r to tho se
o f a m e rc ury b a tte ry in tha t b o th p ro vid e a n a lm o st c o nsta nt
o utp ut (whe n the se nso r is e xp o se d to a c o nsta nt le ve l o f o xyg e n)
thro ug ho ut the ir use ful life , a nd the n fa ll o ff sha rp ly to wa rd s ze ro a t
the e nd . Ce ll fa ilure , in the Mo d e l OT-2 Syste m , will p ro b a b ly b e
ind ic a te d b y the ina b ility to p ro p e rly sp a n c a lib ra te the tra nsm itte r,
o r e xc e ssive ly lo ng re sp o nse tim e to c ha ng e s in o xyg e n c o nc e n-
tra tio n.
To e nsure a va ila b ility, TAI re c o m m e nd s tha t a sp a re c e ll b e
p urc ha se d sho rtly a fte r the instrum e nt is p la c e d in se rvic e , a nd
e a c h tim e the c e ll is re p la c e d .
The sp a re c e ll sho uld b e c a re fully sto re d in a c o o l, a nd ne a r
c o nsta nt te m p e ra ture , a re a if p o ssib le .
NOTE: Do not d isturb the inte g rity of the c e ll p a c ka g e until the
c e ll is to a c tua lly b e use d . If the c e ll p a c ka g e is p unc ture d
a nd ha s b e e n e xp ose d to a tm osp he ric a ir ove r a n e x-
te nd e d p e riod , the se nsor m a y not func tion p rop e rly.
Powe r m ust b e re m ove d from the OT-2 p rior to re m oving or
insta lling the se nsor.
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4
Maintenance
Model OT-2 System
To re p la c e the c e ll: Fig ure 4-1
1. Op e n the e nc lo sure d o o r.
2. Und o the ve lc ro stra p s.
3. Re m o ve the insula tio n.
4. The c e ll b lo c k is lo c a te d in the c e nte r o f the unit.
Unsc re w the c a p o n the b o tto m o f the c e ll b lo c k. The
B-2C se nso r sho uld d ro p d o wn o nc e the c a p is
re m o ve d .
INSULATION
B-2C
SENSOR
CAP
Figure 4-1 Cell Block
NOTE: Be fore the c e ll is re m ove d from its p a c ka g e , a ze ro g a s
with low p p m oxyg e n flowing a t a re la tive hig h ra te
throug h the c e ll b loc k c a n le sse n the tim e it will ta ke the
ne wly insta lle d c e ll to d rop to a ze ro re a d ing .
3. Re m o ve the ne w c e ll fro m its p a c ka g e , a nd c a re fully
re m o ve the sho rting c lip .
WARNING: The se nsor use d in the Mod e l OT-2 Syste m use s
e le c trolyte s whic h m a y c onta in sub sta nc e s tha t a re
ha rm ful if touc he d , swa llowe d , or inha le d . Avoid
c onta c t with ANY fluid or p owd e r in or a round the
unit. Wha t m a y a p p e a r to b e p la in wa te r c ould
c onta in one of the se toxic sub sta nc e s. In c a se of
e ye c onta c t, im m e d ia te ly flush e ye s with wa te r for
a t le a st 15 m inute s. Ca ll p hysic ia n. {Se e Ap p e nd ix -
Ma te ria l Sa fe ty Da ta She e t (MSDS)}.
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4
4. Pla c e the ne w c e ll o n the c a p with the se nsing surfa c e
fa c e d o wn a nd the g o ld c o nta c t ring s up .
5. Po sitio n the c e ll a nd c a p so tha t the c e ll is insid e the c e ll
b lo c k. Pre ss up o n the c a p a nd ro ta te . Tig hte n the c a p
sc re ws.
4.2.1 Ce ll Wa rra nty
The c e ll wa rra nty is se nso r sp e c ific . Ple a se c o nta c t Te le d yne
Ele c tro nic Te c hno lo g ie s/ Ana lytic a l Instrum e nts o n e xp lic it wa r-
ra nty o n se nso rs.
NOTE: Evid e nc e of d a m a g e d ue to ta m p e ring or m isha nd ling will
re nd e r the c e ll wa rra nty null a nd void .
4.3
Sc rub b e r Re p la c e m e nt
To e nsure p ro p e r o p e ra tio n o f the OT-2 Syste m , it is re c o m -
m e nd e d to re p la c e the sc rub b e r e ve ry 6 m o nths o r m o re fre -
q ue ntly if the se nso r is re a c hing e nd o f life p re m a ture ly.
It is im p o rta nt tha t the re p la c e m e nt o f the sc rub b e r b e c o m -
p le te d within o ne ho ur o f it's re m o va l to p re ve nt b a c k d iffusio n o f
o xyg e n fro m the a tm o sp he re to the se nso r.
During sc rub b e r re p la c e m e nt, it is re c o m m e nd e d tha t the 3-
wa y va lve is switc he d to "Sp a n Ga s". This will m inim ize the syste m
re c o ve ry tim e .
NOTE: If the se nsor is e xp ose d to a ir throug h b a c k d iffusion, from
the a tm osp he re it m a y c a use the se nsor to re -sta b ilize
slo wly.
4.4
Filte r Se rvic ing
To e nsure the p ro p e r p e rfo rm a nc e a nd sa m p le flo w, it is
re c o m m e nd e d tha t the sa m p le filte r b e insp e c te d whe n the c e ll is
re p la c e d . The filte r re q uire s b o th a 1" a nd a 11/16" o p e n e nd
wre nc h to re m o ve the filte r b o wl. Turn o ff the sa m p le flo w va lve
p rio r to se rvic ing filte r. The filte r sho uld b e c le a ne d o r re p la c e d a s
re q uire d .
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4
Maintenance
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Appendix
Appendix
Specifications:
SystemEnclosure: NEMA 4 Rated, bulkhead mounted
Power Requirements: 9-16 VDC and 16-275mA.
Ranges: 0–10ppm and 0–100ppm Oxygen
or 0-100 ppm and 0-1000 ppm O2.
Accuracy: ± 2% of full scale at constant temperature and
pressure (temperature and pressure of calibra-
tion), except ± 1ppm on 0–10ppm range.
± 5% of full scale over operating temperature
range (once thermal equilibrium has been
reached), except ± 1ppm on 0–10ppm range.
Response Time (90%): Sensor Response Time = 61 seconds @ 77°F
(25°C).
Overall system response time is flow rate
dependent.
OperatingTemperature: 5-113°F(-15–45°C)
Stability: ± 1% in 24 hours (at constant temperature)
Reproducibility: ± 1% of full scale at constant temperature
Sensor Type: Micro-Fuel Cell class B2C
Optional(applicationdependent):Micro-Fuel
Cell class A2C if CO2 concentration consis-
tently exceeds 1000 ppm.
SignalOutput: 1-5 VDC
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Appendix
Model OT-2 System
Re c om m e nd e d Sp a re Pa rts List
Qty.
Part Number
Description
1
C71345A & C71345B
Ce ll Blo c k Insula tio n Se t
1
1
1
1
1
1
1
1
1
C70976B
C70976A
B71343
P396
PC Bo a rd — 1-5V Tra nsm itte r (0-100/ 0-1000 p p m )
PC Bo a rd — 1-5V Tra nsm itte r (0-10/ 0-100 p p m )
Sc rub b e r Asse m b ly (c o m p le te )
Sc rub b e r Ma te ria l
C6689-B2C
C6689-A2C
F688
Mic ro -Fue l Ce ll B2C Cla ss
Mic ro -Fue l Ce ll A2C Cla ss
Filte r
H517
He a te r
C71272
Ce ll Ho ld e r Asse m b ly
A m inim um c ha rg e is a p p lic a b le to sp a re p a rts o rd e rs.
NOTE: Ord e rs for re p la c e m e nt p a rts should inc lud e the p a rt num b e r (if a va ila b le ) a nd the
m od e l a nd se ria l num b e r of the instrum e nt for whic h the p a rts a re inte nd e d .
Orders should be sent to:
Teledyne Analytical Instruments
16830 Che stnut Stre e t
City o f Ind ustry, CA 91749-1580
Pho ne (626) 934-1500, Fa x (626) 961-2538
TWX (910) 584-1887 TDYANLY COID
We b : www.te le d yne -a i.c o m
o r yo ur lo c a l re p re se nta tive
Dra wing List
C71020 Outline Dia g ra m
B71018 Inte rc o nne c tio n Dia g ra m
D70975 Sc he m a tic — 1-5V Tra nsm itte r
B71019 Pip ing Dia g ra m
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Model OT-2 System
Appendix
Material Safety Data Sheet
Se c tio n I – Pro d uc t Id e ntific a tio n
Prod uc t Na m e :
Mic ro -Fue l Ce lls
Mini-Mic ro -Fue l Ce lls, a ll c la sse s
Sup e r Ce lls, a ll c la sse s e xc e p t T–5F
Ele c tro c he m ic a l Oxyg e n Se nso rs, a ll c la sse s.
Ma nufa c ture r:
Ad d re ss:
Te le d yne Ana lytic a l Instrum e nts
16830 Che stnut Stre e t, City o f Ind ustry, CA
91749
Pho ne :
(626) 934-1500
Da te Pre p a re d o r La st Re vise d : 08/ 08/ 91
Em e rg e nc y Pho ne Num b e r: (626) 934-1500
Se c tio n II – Physic a l a nd Che m ic a l Da ta
Che m ic a l a nd Co m m o n
Na m e s:
Po ta ssium Hyd o xid e (KOH), 15% (w/ v)
Le a d (Pb ), p ure
CAS Num b e r:
KOH 1310–58–3
Pb 7439–92–1
KOH (15%)
–10 to 0 °C
100 to 115 °C
1.09 @ 20 °C
>14
Pb (p ure )
328 °C
1744 °C
11.34
Me lting Po int/ Ra ng e :
Bo iling Po int/ Ra ng e :
Sp e c ific G ra vity:
p H:
N/ A
So lub ility in Wa te r:
Pe rc e nt Vo la tile s b y Vo lum e : No ne
Ap p e a ra nc e a nd Od o r: Co lo rle ss, o d o rle ss so lutio n
Co m p le te ly so lub le
Inso lub le
N/ A
Gre y m e ta l,
o d o rle ss
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Model OT-2 System
Section III – Physical Hazards
Pote ntia l for fire a nd e xp losion: The e le c tro lyte in the Mic ro -Fue l Ce lls is
no t fla m m a b le . The re a re no fire o r e xp lo sio n ha za rd s a sso c ia te d with Mi-
c ro -Fue lCe lls.
Pote ntia l for re a c tivity: The se nso rs a re sta b le und e r no rm a l c o nd itio ns o f
use . Avo id c o nta c t b e twe e n the se nso r e le c tro lyte a nd stro ng a c id s.
Section IV – Health Hazard Data
Prim a ry route of e ntry:
Exp osure lim its: OSHA PEL:
ACGIH TLV:
Ing e stio n, e ye / skin c o nta c t
.05 m g ./ c u.m . (Pb )
2 m g ./ c u.m . (KOH)
Effe c ts of ove re xp osure
Ing e stio n:
The e le c tro lyte c o uld b e ha rm ful o r fa ta l if
swa llo we d .
Ora l LD50 (RAT) = 3650 m g ./ kg
The e le c tro lyte is c o rro sive ; e ye c o nta c t c o uld
re sult in p e rm a ne nt lo ss o f visio n.
The e le c tro lyte is c o rro sive ; skin c o nta c t c o uld
re sult in a c he m ic a l b urn.
Eye :
De rm a l:
Inha la tio n:
Liq uid inha la tio n is unlike ly.
Sig ns/ sym p tom s of e xp osure : Co nta c t with skin o r e ye s will c a use a b urning
se nsa tio n a nd / o r fe e l so a p y o r slip p e ry to
to uc h.
Me d ic a l c o nd itio ns
a g g ra va te d b y e xp osure :
No ne
Ca rc ino g e nic ity:
NTP Annua l Re p o rt o n Ca rc ino g e ns: No t liste d
LARC Mo no g ra p hs: No t liste d
OSHA: No t liste d
Othe r he a lth ha za rd s:
Le a d is liste d a s a c he m ic a l kno wn to the Sta te
o f Ca lifo rnia to c a use b irth d e fe c ts o r o the r re -
p ro d uc tive ha rm .
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Section V – Emergency and First Aid Procedures
Eye Conta c t:
Flush e ye s with wa te r fo r a t le a st 15 m inute s a nd g e t im m e d i-
a te m e d ic a l a tte ntio n.
Skin Conta c t: Wa sh a ffe c te d a re a with p le nty o f wa te r a nd re m o ve c o n-
ta m ina te d c lo thing . If b urning p e rsists, se e k m e d ic a l a tte n-
tio n.
Ing e stio n:
Inha la tio n:
G ive p le nty o f c o ld wa te r. Do no t ind uc e vo m iting . Se e k
m e d ic a l a tte ntio n. Do no t a d m iniste r liq uid s to a n unc o n-
sc io us p e rso n.
Liq uid inha la tio n is unlike ly.
Section VI – Handling Information
NOTE: The oxyg e n se nsors a re se a le d , a nd und e r norm a l c irc um sta nc e s,
the c onte nts of the se nsors d o not p re se nt a he a lth ha za rd . The
following inform a tion is g ive n a s a g uid e in the e ve nt tha t a c e ll
le a ks.
Pro te c tive c lo thing :
Rub b e r g lo ve s, c he m ic a l sp la sh g o g g le s.
Cle a nup p ro c e d ure s: Wip e d o wn the a re a se ve ra l tim e s with a we t p a p e r
to we l. Use a fre sh to we l e a c h tim e .
Pro te c tive m e a sure s
d uring c e ll re p la c e m e nt: Be fo re o p e ning the b a g c o nta ining the se nso r
c e ll, c he c k the se nso r c e ll fo r le a ka g e . If the se nso r
c e ll le a ks, d o no t o p e n the b a g . If the re is liq uid
a ro und the c e ll while in the instrum e nt, p ut o n g lo ve s
a nd e ye p ro te c tio n b e fo re re m o ving the c e ll.
Disp o sa l:
Sho uld b e in a c c o rd a nc e with a ll a p p lic a b le sta te ,
lo c a l a nd fe d e ra l re g ula tio ns.
NOTE: The a b ove inform a tion is d e rive d from the MSDS p rovid e d b y the
m a nufa c ture r. The inform a tion is b e lie ve d to b e c orre c t b ut d oe s not
p urp ort to b e a ll inc lusive a nd sha ll b e use d only a s a g uid e .
Te le d yne Ana lytic a l Instrum e nts sha ll not b e he ld lia b le for a ny
d a m a g e re sulting from ha nd ling or from c onta c t with the a b ove
p ro d uc t.
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