Fluke 75, 21, 77, 23 User Manual

77/75/23/21
Series III Multimeter
Instruction Sheet
W Read First: Safety Information
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.
WWarning
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
Overvoltage Installation Category per IEC 1010:
CAT II CAT III
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
Read First: Safety Information Dangerous Voltage May Be Present Double Insulation
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.

Input Jacks

Milliamp
Amp
FUSED
600V
1000V
CAT CAT
V
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
RANGE
Momentary
MANUAL
RANGE
CAT CAT
+
_
To return to autorange, press for 1 second or turn the rotary switch.
hc11f.eps
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 unstable or noisy readings.
The Touch Hold mode automatically captures and displays stable readings for all functions.
HOLD
AUTO
HOLD
HOLD
RANGE
Momentary
V V V
+
__
When the meter captures new input, it beeps and a new reading is displayed.
Stray voltages can produce a new reading.
To exit the Touch Hold mode, press momentarily or turn the rotary switch.
mode will not capture
HOLD HOLD
RANGE
+
Single Beep
Note
RANGE
CAT CAT
+
hc4f.eps
_

Bar Graph

The bar graph shows readings relative to the full scale value of the displayed measurement range and indicates polarity.
hc15f.eps

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
Volts AC
RANGE
V
CAT CAT
+
Resistance
__
(e)
(K L mL)
Volts DC
RANGE
V
+
Millivolts DC
RANGE
mV
CAT CAT
+
CAT CAT
_
hc3f.eps
Turn off the power and discharge all capacitors. An external voltage across a component will give invalid resistance readings.
RANGE
CAT CAT
+
_
hc7f.eps
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