Fluke III Series User manual

English 73 Series III Instruction Sheet.
Panel
1
®
73
Series III Multimeter
Instruction Sheet
Read First: Safety Information
WTo avoid damage to the meter, electric shock or injury:
•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.
•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.
WWarning
To avoid false readings, which could lead to possible
electric shock or personal injury, replace the battery
as soon as the low battery indicator (M) appears.
Symbols
WCaution: Important Information. See instruction sheet.
MAN Manual Range.
TDouble Insulation.
MLow battery. Replace battery.
CAT II Overvoltage Installation Category per IEC 61010-1-95.
CAT II instruments protect against transients from
equipment supplied from the fixed installation, e.g., TV,
PC, and household appliances.
PN 1646063 February 2002 (English)
1997, 1998,2002Fluke Corporation. All rightsreserved. Printed inChina.
99 Washington Street
Melrose, MA 02176
Phone [phone]
Toll Free 1-800-517-8431
Visit us at www.TestEquipmentDepot.com

English 73 Series III Instruction Sheet.
Panel
2
Terminals
300
mA
10A
FUSED
600V CAT
V
COM
Milliamps
Amps Volts, Ohms, Diode Test
Common Terminal
hr2f.eps
See Specifications for overload protection.
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.
The manual range mode and Touch Hold mode are mutually
exclusive. MAN is displayed when the meter is in the manual
range mode.
Momentary
+_
V
MAN
hr14f.eps
To return to autorange, press Rfor 1 second or change the
measurement function.

English 73 Series III Instruction Sheet.
Panel
3
Automatic Touch Hold Mode
WWarning
To avoid electric shock, do not use the Touch Hold
mode 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 Rfor 2 seconds. HOLD is displayed when
the meter is in the Touch Hold mode.
2 seconds
+_
V DC V DC
_+_
single
beep
V V V
HOLD HOLD
V DC
HOLD
hr3f.eps
When the meter captures a new input, it beeps and a new
reading is displayed.
Note
Stray voltages can produce a new reading.
To exit the Touch Holdmode, press Ror change the
measurement function. The Touch Hold mode and manual range
mode are mutually exclusive.
Bar Graph
The bar graph shows readings relative to the full scale value of a
displayed measurement range and indicates polarity.
hr16f.eps

English 73 Series III Instruction Sheet.
Panel
4
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 (KLmL)
+_+_
V AC V DC
+_
Volts AC Volts DC Millivolts DC
V
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

English 73 Series III Instruction Sheet.
Panel
5
Diode Test (G)
Forward Bias
Single Beep
Reverse Bias
Shorted
Open or
Good Diode
Bad Diode
+_
+_
Bad Diode
+_
Good Diode
+_
hr7f.eps

English 73 Series III Instruction Sheet.
Panel
6
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)
WWarning
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
4
3
2
V
A
hr8f.eps

English 73 Series III Instruction Sheet.
Panel
7
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
WWarning
To avoid electric shock, personal injury, or damage to
the meter:
•Do not service this product other than as described
in this Instruction Sheet unless you are a qualified
technician and have the required equipment and
service information.
•Remove any input signals prior to removing test
leads and opening case.
•When servicing the meter, use only specified
replacement parts.
•Do not allow water to get in the case.
WCaution
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.
For maintenance procedures not described in this Instruction
Sheet, contact a Fluke Service Center.

English 73 Series III Instruction Sheet.
Panel
8
Internal Fuse Test
300 mA
Ω
5-8 Ω
<0.5
OK OK
10 A
OK OK
hr10f.eps
Battery and Fuse Replacement
WWarning
To avoid false readings, which could lead to
possible electric shock or personal injury, replace
the battery as soon as the low battery indicator (M)
appears.
Note
Before opening the case, make sure the test leads are
removed and the rotary switch is turned to OFF.
F1 F2
hr11f.eps

English 73 Series III Instruction Sheet.
Panel
9
Cleaning
To clean the meter, use a damp cloth and mild detergent; do not
use abrasives or solvents on the meter.
Contacting Fluke
To contact Fluke, call:
1-888-99-FLUKE (1-888-993-5853) in U.S.A
1-800-36-FLUKE in Canada
[phone] in Europe
[phone] Japan
[phone] Singapore
[phone] from other countries
Visit Fluke’s web site at:
www.fluke.com.
Register your meter online at:
http://register.fluke.com.
Item Description Part No. Qty.
BT1 Battery, 9 V,
NEDA 1604/IEC 6F22
NEDA 1604A/IEC 6LR61
696534
614487
1
F1* Fuse, F630 mA, 250 V,
Min Interrupt Rating 1500 A, IEC 127-1 740670 1
F2* Fuse, F11 A, 1000 VAC/DC,
Min Interrupt Rating 17 kA 803293 1
* For safety, use exact replacement

English 73 Series III Instruction Sheet.
Panel
10
General Specifications
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 0°C to 50°C
Storage Temperature -40°C to 60°C
Temperature Coefficient 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
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
320.0Ωrange: total accuracy =
specified accuracy + 8 % of range
Relative Humidity
except 32 MΩRange:
32 MΩRange only:
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)
Altitude Operating: 2000 meters
Storage: 12,000 meters
Battery Type 9 V, NEDA 1604 or 6F22 or 006P,
or NEDA 1604A or 6LR61
Battery Life 2000 hrs typical with alkaline
1600 hrs typical with carbon zinc
Continuity Beeper 4096 Hz
Shock, Vibration 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 340 g (12.0 oz)
Safety 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

English 73 Series III Instruction Sheet.
Panel
11
Accuracy 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 ] )
Function Range Accuracy
L3.200 V, 32.00 V, 320.0 V
600 V ±(0.3 %+1) ±(0.4 %+1)
mL320.0 mV ±(0.3 %+1)
K(45 to 500 Hz, 3.2 V
range. Other ranges 45
Hz to 1 kHz)
3.200 V, 32.00 V,
320.0 V, 600 V ±(2 %+2) ±(2 %+2)
e
320.0 Ω
3200 Ω, 32.00 kΩ,
320.0 kΩ, 3.200 MΩ
32.00 MΩ
±(0.5 %+2)
±(0.5 %+1)
±(0.5 %+1)
±(2 %+1)
G R
2.0 V ±(1% typical)
Function Range Accuracy Typical Burden
Voltage
?(45 Hz to
1 kHz) 32.00 mA, 320.0 mA 10.00 A * ±(2.5 %+2) ±(2.5 %+2) 6 mV/mA 50 mV/A
A32.00 mA, 320.0 mA
10.00 A * ±(1.5 %+2) ±(1.5 %+2) 6 mV/mA 50 mV/A
* 10 A continuous, 20 A overload for 30 seconds maximum.

English 73 Series III Instruction Sheet.
Panel
12
Overload protection for all functions and ranges: 600 V.
Function Input Impedance (Nominal)
L, mL, K>10 MΩ, <50 pF
Common Mode
Rejection Ratio
(1 kΩUnbalanced) Normal Mode Rejection
L, mL>120 dB at dc, 50 Hz,
or 60 Hz
K>60 dB dc to 60 Hz >60 dB at 50 Hz or 60 Hz
Open Circuit Test
Voltage
Full Scale Voltage
To 3.2 MΩ32 MΩ
e<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)
GR<3.1 V dc 2.0 V dc
Typical Short Circuit Current
e400 µA
GR500 µA
GVFTypical Test Current
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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