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
W
Z
T
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.
Read First: Safety Information
Manual Range or Automatic Touch Hold mode
Double Insulation
Overvoltage Installation Category per IEC 1010-1.
Typical CAT II locations include main wall outlets,
local appliances, and portable equipment.
Input Jacks
Amps
70
70
10A
300
mA
!
FUSED
Milliamps
See Specifications for overload protection.
Volts, Ohms, Diode Test
V
600V
COM
Common Terminal
hr2f.eps
Pushbutton
Use the pushbutton to either select a fixed range or put the meter
in the Automatic Touch Hold
mode.
Autorange
The meter defaults to autorange when first turned on.
Manual Range
Manual ranging is available in V ac, V dc, ohms, A ac, and A dc.
Momentary
+
V
_
To return to autorange, press R for 1 second or turn the
rotary switch.
hr14f.eps
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
noisy readings.
The Touch Hold mode automatically captures and displays
stable readings. Press R for 2 seconds while turning the
meter on.
mode will not capture unstable or
2 seconds
V DC
V V V
+
_
H
V DC
_
single
beep
V DC
+
_
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
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
Volts AC Volts DC Millivolts DC
V AC
V
+
Resistance
_
(e)
(K L mL)
+
V DC
V
V
_
+
mV
_
hr4f.eps
Turn off the power and discharge all capacitors. An external
voltage across a component will give invalid resistance readings.
k
+
_
hr6f.eps
Diode Test
Good Diode
(G)
Good Diode
+
Forward Bias
Bad Diode
+
Open
_
Single Beep
_
+
Reverse Bias
Bad Diode
+
or
Shorted
_
_
hr7f.eps
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.
1
DC
70
A
V
4
2
3
+
_
hr8f.eps
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 arcflash, 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.
Internal Fuse Test
70
300 mA
OK OK
Ω
5-8
Battery and Fuse Replacement
Note
Before opening the case, make sure the test leads are
removed and the rotary switch is turned to OFF.
<0.5
OK
10 A
Ω
OK
hr10f.eps
F1
70
F2
hr11f.eps
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 1-800-44FLUKE (1-800-443-5853), in Europe, 31 40 267 8200, from other
countries, 1-425-356-5500.
Item Description FlukePNQuan.
BT1 Battery, 9 V, NEDA 1604/IEC 6F22, or
NEDA 1604A/IEC 6LR61
F1* Fuse, F630 mA, 250 V, Min Interrupt
Rating 1500 A, IEC 127-1
F2* Fuse, F11 A, 1000 VAC/DC, Min
Interrupt Rating 17 kA
* For safety, use exact replacement
696534
614487
740670 1
943118 1
1
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
Display Digital: 3,200 counts, updates 2.5/sec
Response Time of Digital
Display
Operating Temperature 0°C to 50°C
Storage Temperature -40°C to 60°C
Temperature Coefficient
600 V
Analog: 31 segments, updates 25/sec
V ac < 2 s
V dc < 1 s
Ω < 1 s to 320 kΩ, < 2s to 3.2 MΩ,
< 10 s to 32 MΩ
0.1 x (specified accuracy)/°C
(<18°C or >28°C)
Electromagnetic Compatibility
in RF field of 3 V/m on all
functions except MΩ
Relative Humidity
except 32 MΩ Range:
32 MΩ Range only:
Altitude
Battery Type 9 V, NEDA 1604 or 6F22 or 006P,
Battery Life 2000 hrs typical with alkaline
Continuity Beeper 4096 Hz
Shock, Vibration per MIL-T-PRF 28800F Class III,
Size (H x W x L) 2.8 cm x 7.5 cm x 16.6 cm
Weight 340 g (12.0 oz)
Safety 600 V CAT II per ANSI/ISA S82.01-
EMC Regulations EN 61326-1: 1997
Certifications/Listings
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
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
or NEDA 1604A or 6LR61
1600 hrs typical with carbon zinc
Sinusoidal, Non Operating
(1.12 in x 2.95 in x 6.55 in)
1994, EN 61010-1: 1993, CSA C22.2
No 1010.1-92, UL 3111-1.
Function Range Accuracy
0L
L
m
K (45 to 500 Hz, 3.2V
range. Other ranges 45
to 1 kHz)
e
G R
Function Range Accuracy Typical
? (45 Hz to
1 kHz)
(73 only)
A
(73 only)
* 10 A continuous, 20 A for 30 seconds maximum.
32.00 mA, 320.0 mA
10.00 A *
32.00 mA, 320.0 mA
10.00 A *
3.200 V, 32.00 V, 320.0 V
600 V
320.0 mV ±(0.3%+1)
3.200 V, 32.00 V,
320.0 V, 600 V
320.0 Ω
3200 Ω, 32.00 kΩ,
320.0 kΩ, 3.200 MΩ
32.00 MΩ
2.0 V ±(1% typical)
±(2.5%+2)
±(2.5%+2)
±(1.5%+2)
±(1.5%+2)
±(0.3%+1)
±(0.4%+1)
±(2%+2)
±(2%+2)
±(0.5%+2)
±(0.5%+1)
±(0.5%+1)
±(2%+1)
Burden
Voltage
6 mV/mA
50 mV/A
6 mV/mA
50 mV/A
Overload protection for all functions and ranges: 600 V.
Function Input Impedance (Nominal)
L, mL, K
L,
L
m
K
e
G R
e
G R
G
>10 MΩ, <50 pF
Common Mode
Rejection Ratio (1
kΩ Unbalanced)
>120 dB at dc, 50 Hz,
or 60 Hz
>60 dB dc to 60 Hz
Open Circuit Test
Voltage
<3.1 V dc
<2.8 V dc (typical)
<3.1 V dc 2.0 V dc
Typical Short Circuit Current
V
F
0.0 V
0.6 V
1.2 V
2.0 V
Normal Mode
Rejection
>60 dB at 50 Hz or 60 Hz
Full Scale Voltage
To 3.2 MΩ 32 MΩ
<440 mV dc
<420 mV dc
(typical)
400 µA
500 µA
Typical Test Current
0.5 mA
0.4 mA
0.3 mA
0.1 mA
<1.4 V dc
<1.3 V dc
(typical)
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