Fluke III Series Instruction Sheet
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Fluke III Series Instruction Sheet

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All manuals and user guides at all-guides.com
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.
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
Read First: Safety Information
Y
Dangerous Voltage May Be Present
T
Double Insulation
Overvoltage Installation Category per IEC 1010:
CAT II
Typical locations include; main wall outlets,
local appliances, and portable equipment.
CAT III
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
Series III Multimeter
Instruction Sheet
W
Warning
®

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Summary of Contents for Fluke III Series

  • Page 1 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...

  • Page 2: Input Jacks

    All manuals and user guides at all-guides.com Input Jacks Milliamp Volts, Ohms, Diode Test 600V Common 1000V Terminal FUSED 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...

  • Page 3: Bar Graph

    All manuals and user guides at all-guides.com 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.
  • Page 4 All manuals and user guides at all-guides.com 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.

  • Page 5: Diode Test (G)

    All manuals and user guides at all-guides.com Diode Test (G) Good Diode Good Diode RANGE RANGE Single Beep Reverse Bias Forward Bias Bad Diode Bad Diode RANGE RANGE Open Shorted hc5f.eps...
  • Page 6 All manuals and user guides at all-guides.com Continuity Test ( R ) RANGE RANGE 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.

  • Page 7: Probe Holder

    All manuals and user guides at all-guides.com Probe Holder hc14f.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 arc- flash, use fuses with ratings shown on the back of the meter.

  • Page 8: Battery Replacement

    All manuals and user guides at all-guides.com 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 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.

  • Page 9: Specifications

    All manuals and user guides at all-guides.com 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.
  • Page 10 All manuals and user guides at all-guides.com Electromagnetic Compatibility Total accuracy = Specified accuracy In RF field of 3 V/m on all + 0.1% of range. functions. Relative Humidity except 32 MΩ range 0% to 90% (0°C to 35°C) 0% to 70% (35°C to 50°C) 32 MΩ...
  • Page 11 All manuals and user guides at all-guides.com Function Range Accuracy ±(0.3%+1) 3.200 V, 32.00 V, 320.0 V ±(0.4%+1) 600 V (21/75), 1000 V (23/77) ±(0.3%+1) 320.0 mV ±(2%+2) (45 to 500 Hz, 3.200 V, 32.00 V, 320.0 V ±(2%+2) 3.2 V range. Other 600 V (21/75), 1000 V (23/77) ranges 45 to 1 kHz) 320.0 Ω...
  • Page 12 All manuals and user guides at all-guides.com Overload protection for all functions and ranges: Rated voltage. Function Input Impedance (Nominal) L, m L, K >10 MΩ, <50 pF Common Mode Normal Mode Rejection Rejection Ratio (1 kΩ Unbalanced) L, m L >120 dB at dc, >60 dB at 50 Hz or 60 Hz 50 Hz, or 60 Hz...

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