®
70/73
Series III Multimeter
Instruction Sheet
W Read First: Safety Information
To ensure that the meter is used safely, follow these instructions:
• Never use the meter if the meter or test leads look damaged.
• Be sure the test leads and rotary switch are in the correct
position for the desired measurement.
• Never measure resistance in a circuit when power is applied.
• Never touch the probes to a voltage source when the test
leads are plugged into the 10 A or 300 mA input jack.
• To avoid damage or injury, never use the meter on circuits that
exceed 4800 volt-amps.
• Never apply more than the rated voltage between any input
jack and earth ground.
• Be careful when working with voltages above 60 V dc or 30 V
ac rms. Such voltages pose a shock hazard.
• Keep your fingers behind the finger guards on the test probes
when making measurements.
Warning
To avoid false readings, which could lead to
possible electric shock or personal injury, replace
the battery as soon as the battery indicator (N)
appears.
Symbols
Read First: Safety Information
Manual Range or Automatic Touch Hold mode
Double Insulation
W
Z
T
Overvoltage Installation Category per IEC 1010-1.
Typical CAT II locations include main wall outlets,
local appliances, and portable equipment.
CAT II
PN 650454 August 1997 Rev.2, 2/98
1997, 1998 Fluke Corporation. All rights reserved. Printed in U.S.A.
All product names are trademarks of their respective companies.
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Automatic Touch Hold Mode
W Warning
To avoid electric shock, do not use the Touch Hold
to determine if a circuit with high voltage is dead.
The Touch Hold mode will not capture unstable or
noisy readings.
The Touch Hold mode automatically captures and displays
stable readings. Press R for 2 seconds while turning the
meter on.
H
V DC
V DC
V DC
V
V
V
2 seconds
_
_
_
+
+
single
beep
hr3f.eps
When the meter captures a new input, it beeps and a new
reading is displayed. To manually force a new measurement to
be held, press R.
Note
Stray voltages can produce a new reading.
To exit the Touch Hold mode, turn the meter off.
Bar Graph
The bar graph shows readings relative to the full scale value of a
displayed measurement range and indicates polarity.
hr16f.eps
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Standby
If the meter is on but is inactive for an hour (20 minutes in diode
test), the screen goes blank and displays selected bar graph
segments. To resume operation, turn the rotary switch or press
R.
AC and DC Voltage (K L L)
m
Volts AC
Volts DC
Millivolts DC
V AC
V DC
V
V
mV
_
_
_
+
+
+
hr4f.eps
Resistance (e)
Turn off the power and discharge all capacitors. An external
voltage across a component will give invalid resistance readings.
k
_
+
hr6f.eps
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Diode Test (G)
Good Diode
Good Diode
_
_
+
+
Single Beep
Forward Bias
Bad Diode
Reverse Bias
Bad Diode
_
_
+
+
or
Open
Shorted
hr7f.eps
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Continuity Test ( R )
_
_
+
+
hr5f.eps
If continuity exists (resistance < 210 Ω), the beeper sounds
continuously. The meter beeps twice if it is in the Touch Hold
mode.
Current (? A)
W Warning
To avoid injury, do not attempt a current
measurement if the open circuit voltage is above the
rated voltage of the meter.
To avoid blowing an input fuse, use the 10 A jack until you are
sure that the current is less than 300 mA.
Turn off power to the circuit. Break the circuit. (For circuits of
more than 10 amps, use a current clamp.) Put the meter in series
with the circuit as shown and turn power on.
DC
1
70
A
+
4
2
_
3
hr8f.eps
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Holster
The snap-on holster absorbs shocks and protects the meter and
comes with a Flex-Stand . To protect the front of the meter, put
the meter face down in the holster.
hr15f.eps
Maintenance
W Warning
To avoid electric shock, remove the test leads
before opening the case, and close the case before
using the meter. To prevent fire and possible arc-
flash, use fuses with ratings shown on the back of
the meter.
Caution
To avoid damaging meter components, lift up the
end of the battery as shown. To avoid
contamination or static damage, do not touch the
circuit board without proper static protection.
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Internal Fuse Test
70
10 A
300 mA
OK
OK
Ω
OK
OK
<0.5
5-8 Ω
hr10f.eps
Battery and Fuse Replacement
Note
Before opening the case, make sure the test leads are
removed and the rotary switch is turned to OFF.
70
F1
F2
hr11f.eps
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Cleaning
To clean the meter, use a damp cloth and mild detergent; do not
use abrasives or solvents on the meter.
Service and Parts
For service information in the U.S.A. and Canada, call 1-800-44-
FLUKE (1-800-443-5853), in Europe, 31 40 267 8200, from other
countries, 1-425-356-5500.
Item
Description
Fluke
PN
Quan.
BT1
F1*
F2*
Battery, 9 V, NEDA 1604/IEC 6F22, or
NEDA 1604A/IEC 6LR61
696534
614487
1
1
1
Fuse, F630 mA, 250 V, Min Interrupt
Rating 1500 A, IEC 127-1
740670
Fuse, F11 A, 1000 VAC/DC, Min
Interrupt Rating 17 kA
943118
* For safety, use exact replacement
Specifications
Accuracy is specified for a period of one year after calibration, at
18°C to 28°C (64°F to 82°F) with relative humidity to 90%. AC
conversions are ac-coupled, average responding, and calibrated
to the RMS value of a sine wave input.
Accuracy specifications are given as:
±([% of reading] + [number of least significant digits])
Maximum Voltage Between
any Terminal and Earth
Ground
600 V
Display
Digital: 3,200 counts, updates 2.5/sec
Analog: 31 segments, updates 25/sec
Response Time of Digital
Display
V ac < 2 s
V dc < 1 s
Ω < 1 s to 320 kΩ, < 2s to 3.2 MΩ,
< 10 s to 32 MΩ
Operating Temperature
Storage Temperature
Temperature Coefficient
0°C to 50°C
-40°C to 60°C
0.1 x (specified accuracy)/°C
(<18°C or >28°C)
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Electromagnetic Compatibility
in RF field of 3 V/m on all
functions except MΩ
Total accuracy = Specified accuracy
plus +2.0% of range for all functions
except:
320.0 mV range: total accuracy =
specified accuracy + 1.0% of range
320.0Ω range: total accuracy =
specified accuracy + 8% of range
Relative Humidity
except 32 MΩ Range:
0% to 90% (0°C to 35°C)
0% to 70% (35°C to 50°C)
0% to 80% (0°C to 35°C)
0% to 70% (35°C to 50°C)
Operating: 2000 meters
Storage: 12,000 meters
32 MΩ Range only:
Altitude
Battery Type
Battery Life
9 V, NEDA 1604 or 6F22 or 006P,
or NEDA 1604A or 6LR61
2000 hrs typical with alkaline
1600 hrs typical with carbon zinc
Continuity Beeper
Shock, Vibration
4096 Hz
per MIL-T-PRF 28800F Class III,
Sinusoidal, Non Operating
Size (H x W x L)
2.8 cm x 7.5 cm x 16.6 cm
(1.12 in x 2.95 in x 6.55 in)
Weight
Safety
340 g (12.0 oz)
600 V CAT II per ANSI/ISA S82.01-
1994, EN 61010-1: 1993, CSA C22.2
No 1010.1-92, UL 3111-1.
EMC Regulations
EN 61326-1: 1997
Certifications/Listings
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Function
Range
Accuracy
3.200 V, 32.00 V, 320.0 V
600 V
±(0.3%+1)
±(0.4%+1)
0L
320.0 mV
±(0.3%+1)
L
m
K (45 to 500 Hz, 3.2V
range. Other ranges 45
to 1 kHz)
3.200 V, 32.00 V,
320.0 V, 600 V
±(2%+2)
±(2%+2)
320.0 Ω
±(0.5%+2)
±(0.5%+1)
±(0.5%+1)
±(2%+1)
3200 Ω, 32.00 kΩ,
320.0 kΩ, 3.200 MΩ
32.00 MΩ
2.0 V
±(1% typical)
Function
Range
Accuracy
Typical
Burden
Voltage
? (45 Hz to 32.00 mA, 320.0 mA
±(2.5%+2)
±(2.5%+2)
6 mV/mA
50 mV/A
1 kHz)
10.00 A *
(73 only)
A
32.00 mA, 320.0 mA
10.00 A *
±(1.5%+2)
±(1.5%+2)
6 mV/mA
50 mV/A
(73 only)
* 10 A continuous, 20 A for 30 seconds maximum.
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Overload protection for all functions and ranges: 600 V.
Function
L, L, K
Input Impedance (Nominal)
>10 MΩ, <50 pF
m
Common Mode
Rejection Ratio (1
kΩ Unbalanced)
Normal Mode
Rejection
>120 dB at dc, 50 Hz,
or 60 Hz
>60 dB at 50 Hz or 60 Hz
L,
L
m
>60 dB dc to 60 Hz
K
Open Circuit Test
Voltage
Full Scale Voltage
To 3.2 MΩ
32 MΩ
<3.1 V dc
<2.8 V dc (typical)
<440 mV dc
<420 mV dc
(typical)
<1.4 V dc
<1.3 V dc
(typical)
e
<3.1 V dc
2.0 V dc
G R
Typical Short Circuit Current
400 µA
500 µA
e
G R
VF
Typical Test Current
G
0.0 V
0.6 V
1.2 V
2.0 V
0.5 mA
0.4 mA
0.3 mA
0.1 mA
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