77/75/23/21 English Instruction Sheet

Page 1

77/75/23/21

Series III Multimeter

®

Instruction Sheet

W Read First: Safety Information

•

Never use the meter if the meter or test leads look damaged.

•

Be sure the test leads and 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 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 battery indicator ( M ) appears.

Symbols

W

Y

T

Read First: Safety Information

Dangerous Voltage May Be Present

Double Insulation

Overvoltage Installation Category per IEC 1010:

CAT II

CAT III

Typical locations include; main wall outlets, local appliances, and portable equipment.

Typical locations include switches in the fixed installation and equipment for industrial use permanently connected to the fixed installation.

PN 650512 August 1997 Rev.2, 7/98



1997, 1998 Fluke Corporation. All rights reserved. Printed in U.S.A.

All product names are trademarks of their respective companies

77/75/23/21 English Instruction Sheet

Page 2

Input Jacks

Milliamp

Amp

V

FUSED

600V

1000V

CAT

CAT

Volts, Ohms,

Diode Test

Common

Terminal hc1f.eps

See Specifications for overload protection.

Autorange

The meter defaults to autorange when you turn on the meter.

Manual Range

Manual ranging is available in V ac, V dc, ohms, A ac, and A dc.

MANUAL

MANUAL

RANGE

Momentary

RANGE

CAT

CAT

_

+

To return to autorange, press rotary switch.

hc11f.eps

for 1 second or turn the

77/75/23/21 English Instruction Sheet

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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 for all functions.

HOLD

AUTO HOLD

HOLD

Momentary

RANGE

V V

RANGE

HOLD

V

RANGE

HOLD

+

_

+

_

Single Beep

+

CAT

CAT

_ hc4f.eps

When the meter captures 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 turn the rotary switch.

momentarily or

Bar Graph

The bar graph shows readings relative to the full scale value of the displayed measurement range and indicates polarity.

hc15f.eps

77/75/23/21 English Instruction Sheet

Page 4

Standby

If the meter is on but is inactive for an hour (20 minutes in diode test), the display goes blank and displays four bar graph segments. To resume operation, turn the rotary switch or press a button.

AC and DC Voltage ( K L m L )

Volts AC Volts DC Millivolts DC

V

RANGE

V

RANGE mV RANGE

+

CAT

CAT

_ +

CAT

CAT

_ +

CAT

CAT

_ hc3f.eps

Resistance ( e

)

Turn off the power and discharge all capacitors. An external voltage across a component will give invalid resistance readings.

RANGE

+

CAT

CAT

_ hc7f.eps

77/75/23/21 English Instruction Sheet

Page 5

Diode Test ( G )

Good Diode

RANGE

Good Diode

RANGE

CAT

+

_

Forward Bias

Single Beep

Bad Diode

RANGE

CAT

CAT

_ +

Reverse Bias

Bad Diode

RANGE

+

CAT

CAT

_

Open

+ and

Shorted

CAT

CAT

_ hc5f.eps

77/75/23/21 English Instruction Sheet

Page 6

Continuity Test ( R )

RANGE RANGE

CAT

CAT

_

CAT

CAT

_

+ + hc8f.eps

If continuity exists (resistance < 210

Ω

for Models 21/75 and

<270

Ω

for Models 23/77), the beeper sounds continuously. The meter beeps twice if it is in Touch Hold  mode.

Current ( ?

A )

W

Warning

To avoid injury, do not attempt a current measurement if the open circuit voltage exceeds 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

RANGE

A

4 +

+

_

CAT

CAT

2

3 hc10f.eps

77/75/23/21 English Instruction Sheet

Page 7

Probe Holder

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 contamination or static damage, do not touch the circuit board without proper static protection.

Internal Fuse Test hc14f.eps

RANGE

4-8

300 mA

Ω

OK

OK

<.5

10 A

Ω

OK

OK hc9f.eps

77/75/23/21 English Instruction Sheet

Page 8

Battery Replacement

Note

Before opening the case, make sure the test leads are removed and the rotary switch is turned to OFF.

hc12f.eps

Fuse Replacement

F1

F2

F2

F1

23/77 21/75 hc13f.eps

Cleaning

To clean the meter, use a damp cloth and mild detergent; do not use abrasives or solvents on the meter.

77/75/23/21 English Instruction Sheet

Page 9

Service and Parts

To contact Fluke, call one of the following telephone numbers:

USA and Canada: 1-888-99-FLUKE (1-888-993-5853)

Europe: +31 402-678-200

Japan: +81-3-3434-0181

Singapore: +65* -276-6196

Anywhere in the world: +1-425-356-5500

Or, visit Fluke’s Web site at www.fluke.com.

Item

Operating Temperature

Storage Temperature

Temperature Coefficient

Description

BT1

F1*

F2*

F1*

F2*

Battery, 9 V, NEDA 1604/IEC 6F22, or

NEDA 1604A/IEC 6LR61

Models 21/75:

Fuse, F630 mA, 250 V, Min Interrupt

Rating 1500 A or IEC 127-1

Fuse, F11 A, 1000 VAC/DC,

Min Interrupt Rating 17 kA

Models 23/77:

Fuse, F44/100 A, 1000 VAC/DC,

Min Interrupt Rating 10 kA

Fuse, F11 A, 1000 VAC/DC,

Min Interrupt Rating 17 kA

* For safety, use exact replacement

Maximum Voltage Between any Terminal and Earth

Ground

Display

Response Time of Digital

Display

Rated voltage

Fluke

PN

696534

614487

740670

943118

943121

943118

Quan.

1

1

1

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])

Digital: 3,200 counts, updates 2.5/sec

Analog: 31 segments, updates 25/sec

V ac < 2 s

V dc < 1 s

Ω

< 1s to 320 k

Ω

, < 2s to 3.2 M

Ω

,

< 10 s to 32 M

Ω

0

°

C to 50

°

C

-40

°

C to 60

°

C

0.1 x (specified accuracy)/

°

C

(<18

°

C or >28

°

C)

77/75/23/21 English Instruction Sheet

Page 10

Electromagnetic Compatibility

In RF field of 3 V/m on all functions.

Relative Humidity except 32 M

Ω

range

32 M

Ω

range only

Altitude

Battery Type

Battery Life

Continuity Beeper

Shock, Vibration

Size (H x W x L)

Weight

Safety

EMC Regulations

Certifications/Listings

Total accuracy = Specified accuracy

+ 0.1% 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

9 V NEDA 1604 or 6F22 or 006P, or NEDA 1604A or 6LR61

2000 hrs typical with alkaline

1600 hrs typical with carbon zinc

4096 Hz per MIL-T-PRF 28800F Class III,

Sinusoidal, Non Operating

3.7 cm x 8.9 - 7.8 cm x 19 cm

(1.5 in x 3.5 - 3.1 in x 7.49 in)

365 g (12.9 oz)

Models 21/75 Series III: 600 V CAT III,

Models 23/77 Series III: 600 V CAT III and 1000 V CAT II per ANSI/ISA

S82.01-1994, EN 61010-1: 1993, CSA

C22.2 No 1010.1-92, UL 3111-1.

EN 61326-1 1997.

77/75/23/21 English Instruction Sheet

Page 11

Function

L m

L

K

(45 to 500 Hz,

3.2 V range. Other ranges 45 to 1 kHz) e

21/75:

G R

23/77:

Range

3.200 V, 32.00 V, 320.0 V

600 V (21/75), 1000 V (23/77)

320.0 mV

3.200 V, 32.00 V, 320.0 V

600 V (21/75), 1000 V (23/77)

320.0

Ω

3200

Ω

, 32.00 k

Ω

,

320.0 k

Ω

3.200 M

Ω

32.00 M

Ω

320.0

Ω

3200

Ω

, 32.00 k

Ω

,

320.0 k

Ω

3.200 M

Ω

32.00 M

Ω

2.0 V

Accuracy

±

(0.3%+1)

±

(0.4%+1)

±

(0.3%+1)

±

(2%+2)

±

(2%+2)

±

(0.5%+2)

±

(0.5%+1)

±

(0.5%+1)

±

(2%+1)

±

(0.5%+3)

±

(0.5%+1)

±

(0.5%+1)

±

(2%+1)

±

(1% typical)

Function

?

(45 Hz to 1 kHz)

A

Range

32.00 mA, 320.0 mA

10.00 A *

32.00 mA, 320.0 mA

10.00 A *

Accuracy

±

(2.5%+2)

±

(2.5%+2)

±

(1.5%+2)

±

(1.5%+2)

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

Burden

Voltage

(typical)

6 mV/mA

50 mV/A

6 mV/mA

50 mV/A

77/75/23/21 English Instruction Sheet

Page 12

Overload protection for all functions and ranges: Rated voltage.

Function Input Impedance (Nominal)

L , m L , K

>10 M

Ω

, <50 pF

Common Mode

Rejection Ratio

(1 k

Ω

Unbalanced)

Normal Mode Rejection

L , m L

>120 dB at dc,

50 Hz, or 60 Hz

>60 dB at 50 Hz or 60 Hz

K

>60 dB dc to 60 Hz

Open Circuit Test

Voltage

Full Scale Voltage

To 3.2 M

Ω

32 M

Ω 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)

Full Scale Voltage

G R

Open Circuit Test

Voltage

<3.1 V dc 2.0 V dc

Short Circuit Current (typical) e

G

G

R

21/75:

400

µ

A

500

µ

A

V

F

0.0 V

0.6 V

1.2 V

2.0 V

23/77:

300

µ

A

400

µ

A

21/75:

0.5 mA

0.4 mA

0.3 mA

0.1 mA

Current (typical)

23/77:

0.4 mA

0.3 mA

0.2 mA

0.1 mA