Fluke 73 II User Manual

73

Series III Multimeter

Instruction Sheet

Read First: Safety Information

W To 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.

W Warning

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

W

MAN

T

M

CAT II

PN 1646063 February 2002 (English)

1997, 1998, 2002 Fluke Corporation. All rights reserved. Printed in China.



Caution: Important Information. See instruction sheet.
Manual Range.
Double Insulation.
Low battery. Replace battery.
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.

Terminals

Amps

Volts, Ohms, Diode Test

FUSED

600V

V

CAT

COM

Common Terminal

hr2f.eps

Milliamps

10A

300
mA

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.

MAN

Momentary

+

V

_

hr14f.eps

To return to autorange, press R for 1 second or change the
measurement function.

Automatic Touch Hold Mode

W Warning

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 R for 2 seconds. HOLD is displayed when
the meter is in the Touch Hold mode.

2 seconds

HOLD HOLD

V DC

V V V

+

_

V DC

_

single
beep

HOLD

V DC

+

_

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 R or 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

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

(G)

Good Diode

+

Forward Bias

Bad Diode

+

_

Single Beep

_

Good Diode

+

Reverse Bias

Bad Diode

+

_

_

Open

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

A

V

DC

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, 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.
W 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.

For maintenance procedures not described in this Instruction
Sheet, contact a Fluke Service Center.

Internal Fuse Test

300 mA

5-8

OK OK

Ω

<0.5

OK

Ω

Battery and Fuse Replacement

W Warning

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.

10 A

OK

hr10f.eps

F1

F2

hr11f.eps

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

BT1 Battery, 9 V,

NEDA 1604/IEC 6F22
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

Part

No. Qty.

696534
614487
740670 1

803293 1

1

General Specifications

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 0.1 x (specified accuracy) / °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 Operating: 2000 meters

Battery Type 9 V, NEDA 1604 or 6F22 or 006P,

Battery Life

Continuity Beeper 4096 Hz
Shock, Vibration per MIL-T-PRF 28800F Class III,

Size (H x W x L)

Weight 340 g (12.0 oz)
Safety 600 V CAT II per ANSI/ISA S82.01-

EMC Regulations EN 61326-1: 1997
Certifications/Listings

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

(<18°C or >28°C)
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)

Storage: 12,000 meters

or NEDA 1604A or 6LR61
2000 hrs typical with alkaline

1600 hrs typical with carbon zinc

Sinusoidal, Non Operating

2.8 cm x 7.5 cm x 16.6 cm
(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.

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

L

L

m

K (45 to 500 Hz, 3.2 V

range. Other ranges 45
Hz to 1 kHz)

e

G R

Function Range Accuracy

? (45 Hz to

1 kHz)

32.00 mA, 320.0 mA

10.00 A *

A 32.00 mA, 320.0 mA

10.00 A *

* 10 A continuous, 20 A overload for 30 seconds maximum.

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)

Typical Burden

6 mV/mA
50 mV/A

6 mV/mA
50 mV/A

Voltage

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

400 µA
500 µA

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)

Typical Test Current

0.5 mA

0.4 mA

0.3 mA

0.1 mA

<1.4 V dc
<1.3 V dc
(typical)