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PSIM-AC PSIM-DC PSIM-5V
Index
1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
6 Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
PSIM-AC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
PSIM-DC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
PSIM-5V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Environmental . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Approvals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
2 Safety Information . . . . . . . . . . . . . . . . . . . . . . . . .3
Service Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Terms and Symbols in this manual . . . . . . . . . . . . .3
3 General Information . . . . . . . . . . . . . . . . . . . . . . .5
PSIM Variants . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
PSIM General Layout . . . . . . . . . . . . . . . . . . . . . . .6
PSIM used in a small network configuration . . . . . .7
7 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Orbit Network Power Supply Requirements . . . . . .16
Orbit Network Protection . . . . . . . . . . . . . . . . . . . .16
Voltage Drop Estimation . . . . . . . . . . . . . . . . . . . . .17
Application 1: Basic small network connection . . .18
Application 2: Large network with modules close
to computer and at a distance . . . .19
4 PSIM Schematic and Pin-out . . . . . . . . . . . . . . . .8
PSIM Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Application 3: Large network using PSIM-5V and
RS232IM for network control . . . . .21
Application 4: Modules located a long distance
from computer . . . . . . . . . . . . . . . .23
5 Dimensions and Mechanical Installation . . . . . .10
5.1 Power Supply . . . . . . . . . . . . . . . . . . . . . . . . .10
5.2 PSIM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Application 5: Use with RS232 Interface Module
(RS232IM) . . . . . . . . . . . . . . . . . . .24
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PSIM-AC PSIM-DC PSIM-5V
1.0: Introduction
Introduction
This Manual
The Power Supply Interface Module (PSIM) is part of the
Orbit Measurement System. The PSIM provides local
power to the network when required. Example uses:
• Power via the communications cable is not sufficient
due to cable voltage drops.
The manual describes the three types of PSIM.
Technical specifications, safety information and
application notes are detailed for each type.
PSIM-AC
Universal mains input to regulated 5V output.
10 - 30 Vdc input to regulated 5V output.
5 Vdc input (from user regulated supply).
PSIM-AC
PSIM-DC
PSIM-5V
• The controlling computer is not suitable to supply the
Orbit Network.
• An RS232 Interface Module is used to control the
Orbit Network.
Note:
Throughout this manual the Orbit System is referred to as requring a 5V power supply. For any applications, actual
voltages or power supplies may be within the 4.75 to 5.25V range according to configuration. PSIM-AC and PSIM-DC
has a nominal 5.1V output no load voltage. This allows for voltage drops across cables when Orbit Modules are added.
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PSIM-AC PSIM-DC PSIM-5V
2.0: Safety Information
This equipment is designed as safety Class 1 apparatus
to comply with EN61010-1.
CAUTION: Power Source. The PSIM-AC unit should
be connected to the mains supply via a suitable lead
with a IEC320 socket. The user should fuse this
connection with a suitable fuse. Refer to Specification.
Apply no more than 265V rms. (AC) between supply
conductors and ground.
Service Safety
This equipment has been designed and tested to meet
the requirements of the Low Voltage Directive (1997)
and has been supplied in a safe condition. This manual
contains information and warnings that must be followed
by the user to ensure safe operation and to retain the
apparatus in a safe condition.
WARNING: Do not operate in an explosive
atmosphere.
WARNING: Do not remove covers or panels.
To avoid personal injury, do not remove covers
and panels. Do not operate the equipment
without the covers and panels fitted. There are
no internal adjustments required during the
commissioning of the equipment.
Terms and Symbols in this Manual
WARNING statements identify conditions or practices
that could result in personal injury or loss of life.
CAUTION statements identify conditions or practices
that could result in damage to the equipment or
other property.
This symbol indicates where applicable cautionary or
other information is to be found.
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PSIM-AC PSIM-DC PSIM-5V
2.0: Safety Information (continued)
WARNING: Danger arising from loss of
ground. During a fault condition and upon loss
of protective ground (earth), all accessible
conducting parts - including controls that might
appear to be insulated - can render an electric
shock.
CAUTION
This equipment contains no user serviceable parts. This
equipment must be returned to original supplier for all
service and repair. Dismantling the unit will invalidate the
warranty.
CAUTION
WARNING: Grounding the equipment. The
unit is grounded through the mains lead: to
avoid electric shock, plug the power lead into a
properly-wired receptacle before connecting to
the input or output terminals. A protective
ground connection by way of the grounding
conductor in the power lead is essential for safe
operation.
To avoid a fire hazard, use the correct fuse type, voltage
and current rating as specified for the equipment. Refer
fuse replacement to qualified personnel.
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PSIM-AC PSIM-DC PSIM-5V
3.0: General Information
PSIM Variants
PSIM-AC
To power Orbit Modules
from a local mains supply
IEC plug
mains input
Power Supply
OUTPUT
Input: 90 - 230 VAC
9
6
Output: 5 VDC to Orbit Network
5
1
PSIM-DC
To power Orbit Modules
from a local DC supply,
such as 24V
5m flying lead
Input: 10 - 30 VDC (customer supply)
Output: 5 VDC to Orbit Network
Power Supply
OUTPUT
9
6
5
1
PSIM-5V
To power Orbit Modules
from a local 5V regulated
supply
5m flying lead
Input: 5 VDC (customer supply)
Output: 5 VDC to Orbit Network
Power Supply
OUTPUT
9
6
5
1
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PSIM-AC PSIM-DC PSIM-5V
3.0: General Information (continued)
PSIM General Layout
*Cable Lengths
• PSIM-AC and PSIM-DC have a fixed 2m cable
2m*
between PIE and power supply.
PSIM-AC
• PSIM-DC and PSIM-5V input cables are supplied 5m
long. This may be cut to length as required.
5m*
2m*
PSIM-DC
5m*
PSIM-5V
Power Supply Interface
Module (PSIM)
Socket side 5V
from external power
supply introduced
Plug side 5V
connection is
interrupted
T-CON is permanently
attached, module does
not separate
Power Supply
OUTPUT
Power Supply
OUTPUT
6
9
9
6
5
1
5
1
Orbit Network
Orbit Network
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PSIM-AC PSIM-DC PSIM-5V
3.0: General Information (continued)
PSIM used in a small network configuration
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PSIM-AC PSIM-DC PSIM-5V
4.0: PSIM Schematic and Pin-out
The 5V power supply line from the network is isolated at the PSIM.
All modules before the PSIM are powered from the network. Example: Orbit Network Card.
All modules after the PSIM are powered from the external power supply connected via the PSIM. 0 V is common.
From External
Power Supply
PLUG Side
SOCKET Side
5 V from Orbit Network
(no pins on connector)
5 V to Orbit
Network
0 V
0 V
RS485
RS485
PSIM Schematic
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PSIM-AC PSIM-DC PSIM-5V
4.0: PSIM Schematic and Pin-out (continued)
Plug Pin-out
1 = No connection
2 = RS485 (A)
3 = RS485 (B)
4 = 0V
View into plug
Socket Pin-out
View into socket
9
8
7
6
1 = No connection
2 = RS485 (A)
3 = RS485 (B)
4 = 0V
5 = 0V
6 = +5V
7 = +5V
8 = +5V
9 = 0V
shell = case / 0V
6
7
8
9
5 = 0V
5
4
3
2
1
6
= No connection (no pin)
1
2
3
4
5
7 = No connection (no pin)
8 = No connection (no pin)
9 = 0V
Connection to PSIM from
Orbit Network
Connection from PSIM to
Orbit Network
shell = case / 0V
The PSIM will only supply power to the Orbit Modules that follow the PSIM. Some typical configurations are shown. For
more information about PSIM and Orbit Network connection, refer to the Applications section.
Orbit Modules are designed to work from a supply voltage of 4.75 to 5.25 Vdc and care must be taken to ensure that all
modules have the right working voltage applied. See application notes.
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PSIM-AC PSIM-DC PSIM-5V
5.0: Dimensions and Mechanical Installation
5.1 Power Supply
The mounting plate must not
be removed. The mounting
plate is isolated and does not
need to be at earth potential.
The power supply may be mounted in
any orientation.
The power supply must not be
exposed to fluids or excessive dust.
Power supply cooling is by convection;
allow room for air to flow around the
unit.
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PSIM-AC PSIM-DC PSIM-5V
5.0: Dimensions and Mechanical Installation
(continued)
5.2 PSIM
T-CON is permanently attached, module does not
separate.
For more information on mounting, refer to the Orbit
Measurement System Manual.
Power Supply
OUTPUT
Power Supply
OUTPUT
9
6
6
9
5
1
5
1
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PSIM-AC PSIM-DC PSIM-5V
6.0: Specification
All specifications are for a PSIM supplying a full network of probes.
PSIM-AC
Input
Voltage
Current
85 to 264 Vac @ 47 Hz to 440 Hz.
0.8 A
Connection
Isolation
via IEC320 connector
2500 Vac input/output
Protection
Recommended Line Fuse
Input fuse and filter (not user replaceable)
2A T (slo-blo) 250 V rating
DC Output
Output Voltage
Output Current
Output Regulation
Transient Response
Ripple and Noise
Efficiency
5.1 Vdc Nominal
1.8 A max (i.e. 31 Orbit Modules)
3% (Line / Load)
Max. 4% deviation recovers to 1% within 500 ms
< 1% p-p
65% to 70% typical
Protection
see note 2
Thermal Derating
The output current shall be derated from 40 °C
to 60 °C by 50%. (ie. Max. output at 60 °C
is 0.9A or 15 Orbit Modules.)
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PSIM-AC PSIM-DC PSIM-5V
6.0: Specification (continued)
All specifications are for a PSIM supplying a full network of probes.
PSIM-DC
Input
Line Voltage
Current
Connection
Isolation
10 to 30 Vdc.
1.1 A @ 12 Vdc; 0.5 A @ 24 Vdc (nominal).
5m flying lead (Red = positive, White = negative)
>500 VDC input/output
see note 3
Protection
Input fuse and filter (not user replaceable)
Over voltage and under voltage shut down
Reverse connection
DC Output
Output Voltage
Output Current
Output Regulation
Transient Response
Ripple and Noise
Efficiency
5.1 Vdc. Nominal
1.8 A max. (i.e. 31 Orbit Modules)
3% (Line / Load)
200us to 1% (FL to 1/2L)
< 1% p-p
80% to 86% typical
Protection
see note 2
Thermal Derating
The output current shall be derated from 40 °C
to 60 °C by 50%. (ie. Max. output at 60 °C
is 0.9A or 15 Orbit Modules.)
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PSIM-AC PSIM-DC PSIM-5V
6.0: Specification (continued)
PSIM-5V
Line Voltage
see note 1
5.1 Vdc Nominal as supplied by user
5.25 Vdc MAX
Input Current
Connection
Isolation
1.8 A MAX
see note 3
see note 2
5m flying lead (Red = positive, White = negative)
None
Current limiting resettable fuse
Over voltage 112% to 132% of nominal
Reverse connection
Protection
Transient
Note 1: No isolation or regulation is provided by the PSIM-5V. The voltage required should be set as required
to ensure correct operating voltage for each PIE that follows the PSIM-5V. See application notes for
further information.
Note 2: If there is a fault condition caused, for example, by a short circuit or transient, the protection circuits
will operate. The power must be removed and the fault corrected before the power is reinstated.
Under a fault condition, Orbit modules will not function correctly and a power on reset is required.
See application notes for further information.
Note 3: Supplied with 5m input cable as standard. This may be cut to length as required.
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PSIM-AC PSIM-DC PSIM-5V
6.0: Specification (continued)
Environmental
Operational temperature
Storage temperature
Humidity
0 to 60 °C
-20 to 60 °C
5% to 95% non-condensing
Convection
Cooling
Protection Rating
Protection Rating
Power supply unit
PSIM module
IP40
IP53
Approvals
EMC Susceptibility EN 50082-1
EMC Emission
Safety
EN 50081-2 (note: ferrite block on cable must not be removed)
EN61010-1
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PSIM-AC PSIM-DC PSIM-5V
7.0: Applications
Orbit Network Power Supply Requirements
All Orbit Modules are designed to work from a supply
voltage of 4.75V to 5.25 Vdc. When power is applied to
a module its current consumption will cause a slight
voltage drop across cables. Care must be taken to
ensure that all modules have the right working voltage
applied.
Orbit Network Protection
Each PSIM provides a high level of protection for an
Orbit Network. Protection for mis-connection, over
voltage and transients is provided.
If a transient or other over voltage occurs, the protection
circuits will short circuit (crow bar) the power supply. At
this time, the voltage levels to each Orbit Module will be
below the working limit. When the fault condition has
been removed, Orbit power must be removed and re-
applied to allow a full hardware reset to take place. A
software reset is not possible under these conditions.
This section is for guidance only. Since every application
is different, it is not possible to give precise information
that covers all installations.
Your original supplier will be able to provide further
advice, if required.
Note:
Throughout this manual the Orbit System is referred to as requring a 5V power supply. For any applications, actual
voltages or power supplies may be within the 4.75 to 5.25V range according to configuration. PSIM-AC and PSIM-DC
has a nominal 5.1V output no load voltage. This allows for voltage drops across cables when Orbit Modules are added.
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PSIM-AC PSIM-DC PSIM-5V
7.0: Applications (continued)
Voltage Drop Estimation
The following information is for guidance only when planning an installation. Voltage measurements must still be made
to ensure the right working voltage for each Orbit Module.
Power Supply
OUTPUT
6
9
5
1
PSIM-AC
PSIM-DC
volt drop
(from no load output)
V = 5.3 x N (mV)
PSIM-5V
volt drop
Orbit Module with T-CON
volt drop
Standard 2m Comms
see note 1
see note 3
cable
volt drop
see note 2
V = 2 x N x ( L+1 ) (mV)
V = 0.04 x 1+2+3+...+N
V = 15.2 x N (mV)
Where N = number of Orbit Modules with T-CON following any particular part above
L = cable length for PSIM-5V input cable
Note 1 Input cable length has no affect on this calculation.
Note 2 1 + 2 + 3 + ....... + N = N(N+1)/2.
Note 3 The cable supplied with the Orbit Network Card.
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PSIM-AC PSIM-DC PSIM-5V
7.0: Applications (continued)
Application 1: Basic Small Network Connection.
• Power supplied to network from PC via network card, no PSIM used.
• Modules connected using standard communication cables.
Volt drop total in mV
= cable 1 + module (3 off) + cable 2 + module (3 off)
= (15.2 x 6) + 0.04(6+5+4+3+2+1) + (15.2 x 3) + 0.04(3+2+1)
= 138 mV
Then approximate voltage at end of network = nominal supply voltage - calculated volt drop
= 5.1 - 0.138
= 4.96 V
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PSIM-AC PSIM-DC PSIM-5V
7.0: Applications (continued)
Application 2: Large network with modules close to computer and at a distance.
• Power supplied from PC and PSIM (located at a distance from PC).
• Communications via standard communications cable and custom cable.
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PSIM-AC PSIM-DC PSIM-5V
7.0: Applications (continued)
Volt drop V1 is calculated in a similar way to the previous example except there is only a single cable and 3 Orbit
modules. The PSIM supplies power to remaining modules and are calculated separately. The long communications
cable does not carry supply current and so has no affect on volt drops.
Calculation for V1 volt drop = cable + module (3 off)
= (15.2 x 3) + 0.04(3+2+1)
= 46 mV
Then approximate voltage at end of network
= nominal supply voltage - calculated volt drop
= 5.1 - 0.046
= 5.054 V
i.e. greater than 4.75 Vdc; the minimum working voltage.
Calculation for V2 volt drop = PSIM + module (3 off)
= (5.3 x 3) + 0.04(3+2+1)
= 16 mV
Then approximate voltage at end of network
= nominal supply voltage - calculated volt drop
= 5.1 - 0.016
= 5.084 V
i.e. greater than 4.75 Vdc; the minimum working voltage.
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PSIM-AC PSIM-DC PSIM-5V
7.0: Applications (continued)
Application 3: Large Network using PSIM-5V and RS232IM for network control.
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PSIM-AC PSIM-DC PSIM-5V
7.0: Applications (continued)
The PSIM-5V is powering the whole Orbit Network. PSIM-5V volt drop is calculated using 12 as the total number of
Orbit modules; the RS232IM is included in this number.
Total Voltage drop
= PSIM-5V + modules (6 off) + Cable 1 + Modules (6 off)
= (2 x 12 x [3+1]) + 0.04 (1+2+3+4+5+6+7+8+9+10+11+12)+ (15.2 x 6) + 0.04
(1+2+3+4+5+6)
= 96 + 3.12 + 91.2 + 0.84
= 191 mV
Then approximate voltage at end of network
= nominal supply voltage - calculated volt drop
= 5.25 - 0.191
= 5.06 V
i.e. greater than 4.75 Vdc the minimum working voltage. In this example the input supply to the PSIM-5V could be
reduced to 5.1 V (the Orbit nominal value).
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PSIM-AC PSIM-DC PSIM-5V
7.0: Applications (continued)
Application 4: Modules located a long distance from computer.
• Also for a computer that is not suitable for supplying power to Orbit Modules.
• Power supplied from PSIM to modules.
• Connection via long cable providing RS485, 0V reference and screening.
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PSIM-AC PSIM-DC PSIM-5V
7.0: Applications (continued)
Application 5: Use with RS232 Interface Module (RS232IM).
• Communication is via a RS232IM.
• Power to the RS232IM and Orbit Modules is via PSIM.
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WARRANTY/DISCLAIMER
RETURN REQUESTS/INQUIRIES
Direct all warranty and repair requests/inquiries to the OMEGA Customer
Service Department. BEFORE RETURNING ANY PRODUCT(S) TO
OMEGA, PURCHASER MUST OBTAIN AN AUTHORIZED RETURN (AR)
NUMBER FROM OMEGA’S CUSTOMER SERVICE DEPARTMENT (IN
ORDER TO AVOID PROCESSING DELAYS). The assigned AR number
should then be marked on the outside of the return package and on any
correspondence.
OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and
workmanship for a period of 13 months from date of purchase. OMEGA’s Warranty adds
an additional one (1) month grace period to the normal one (1) year product warranty to
cover handling and shipping time. This ensures that OMEGA’s customers receive
maximum coverage on each product.
If the unit malfunctions, it must be returned to the factory for evaluation. OMEGA’s Customer
Service Department will issue an Authorized Return (AR) number immediately upon phone
or written request. Upon examination by OMEGA, if the unit is found to be defective, it will
be repaired or replaced at no charge. OMEGA’s WARRANTY does not apply to defects
resulting from any action of the purchaser, including but not limited to mishandling, improper
interfacing, operation outside of design limits, improper repair, or unauthorized modification.
This WARRANTY is VOID if the unit shows evidence of having been tampered with or shows
evidence of having been damaged as a result of excessive corrosion; or current, heat,
moisture or vibration; improper specification; misapplication; misuse or other operating
conditions outside of OMEGA’s control. Components which wear are not warranted,
including but not limited to contact points, fuses, and triacs.
The purchaser is responsible for shipping charges, freight, insurance and
proper packaging to prevent breakage in transit.
FOR WARRANTY RETURNS,
please have the following
information available BEFORE
contacting OMEGA:
1. Purchase Order number under
which the product was
PURCHASED,
FOR NON-WARRANTY REPAIRS,
consult OMEGA for current repair
charges. Have the following
information available BEFORE
contacting OMEGA:
1. Purchase Order number to cover
the COST of the repair,
2. Model and serial number of the
product under warranty, and
3. Repair instructions and/or
specific
OMEGA is pleased to offer suggestions on the use of its various products. However,
OMEGA neither assumes responsibility for any omissions or errors nor assumes liability
for any damages that result from the use of its products in accordance with information
provided by OMEGA, either verbal or written. OMEGA warrants only that the parts
manufactured by it will be as specified and free of defects. OMEGA MAKES NO OTHER
WARRANTIES OR REPRESENTATIONS OF ANY KIND WHATSOEVER, EXPRESS OR
IMPLIED, EXCEPT THAT OF TITLE, AND ALL IMPLIED WARRANTIES INCLUDING ANY
WARRANTY OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
HEREBY DISCLAIMED. LIMITATION OF LIABILITY: The remedies of purchaser set forth
herein are exclusive, and the total liability of OMEGA with respect to this order, whether
based on contract, warranty, negligence, indemnification, strict liability or otherwise, shall
not exceed the purchase price of the component upon which liability is based. In no event
shall OMEGA be liable for consequential, incidental or special damages.
2. Model and serial number of the
product, and
3. Repair instructions and/or specific
problems relative to the product.
problems relative to the product.
OMEGA’s policy is to make running changes, not model changes, whenever an
improvement is possible.
This affords our customers the latest in technology and engineering.
OMEGA is a registered trademark of OMEGA ENGINEERING, INC.
© Copyright 2004 OMEGA ENGINEERING, INC. All rights reserved. This
document may not be copied, photocopied, reproduced, translated, or reduced to
any electronic medium or machine-readable form, in whole or in part, without the
prior written consent of OMEGA ENGINEERING, INC.
CONDITIONS: Equipment sold by OMEGA is not intended to be used, nor shall it be used:
(1) as a “Basic Component” under 10 CFR 21 (NRC), used in or with any nuclear
installation or activity; or (2) in medical applications or used on humans. Should any
Product(s) be used in or with any nuclear installation or activity, medical application, used
on humans, or misused in any way, OMEGA assumes no responsibility as set forth in our
basic WARRANTY/ DISCLAIMER language, and, additionally, purchaser will indemnify
OMEGA and hold OMEGA harmless from any liability or damage whatsoever arising out of
the use of the Product(s) in such a manner.
M-3340/1206
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Process Measurement and Control?
OMEGA…Of Course!
TEMPERATURE
DATA ACQUISITION
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Thermocouple, RTD & Thermistor Probes, Connectors,
Panels & Assemblies
Wire: Thermocouple, RTD & Thermistor
Calibrators & Ice Point References
Recorders, Controllers & Process Monitors
Infrared Pyrometers
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Data Acquisition & Engineering Software
Communications-Based Acquisition Systems
Plug-in Cards for Apple, IBM & Compatibles
Datalogging Systems
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Recorders, Printers & Plotters
HEATERS
PRESSURE, STRAIN AND FORCE
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Heating Cable
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Transducers & Strain Gauges
Load Cells & Pressure Gauges
Displacement Transducers
Cartridge & Strip Heaters
Immersion & Band Heaters
Flexible Heaters
Instrumentation & Accessories
Laboratory Heaters
ENVIRONMENTAL
MONITORING AND CONTROL
FLOW/LEVEL
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Rotameters, Gas Mass Flowmeters & Flow Computers
Air Velocity Indicators
Turbine/Paddlewheel Systems
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Metering & Control Instrumentation
Refractometers
Pumps & Tubing
Air, Soil & Water Monitors
Industrial Water & Wastewater Treatment
pH, Conductivity & Dissolved Oxygen Instruments
Totalizers & Batch Controllers
pH/CONDUCTIVITY
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pH Electrodes, Testers & Accessories
Benchtop/Laboratory Meters
Controllers, Calibrators, Simulators & Pumps
Industrial pH & Conductivity Equipment
LDN-PS
M-3340/1206
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