User's Manual
Table Of Contents
- Models 175, 177, 179 True RMS Multimeters
- Models 175, 177 & 179 True RMS Multimeters
- Contacting Fluke
- "Warning" and "Caution" Statements
- Unsafe Voltage
- Test Lead Alert
- Battery Saver ("Sleep Mode")
- Terminals
- Rotary Switch Positions
- Display
- MIN MAX AVG Recording Mode
- Display HOLD and AutoHOLD Modes
- YELLOW Button
- Display Backlight (Model 177 and 179 Only)
- Manual Ranging and Autoranging
- Power-Up Options
- Making Basic Measurements
- Using the Bar Graph
- Cleaning
- Testing the Fuses
- Replacing the Battery and Fuses
- Specifications

ii
Warning. Read before using the Meter:
To avoid possible electrical shock or personal injury, follow these guidelines:
⇒ Use the Meter only as specified in this manual or the protection provided by the Meter might be impaired.
⇒ Do not use the Meter or test leads if they appear damaged, or if the Meter is not operating properly. If in doubt, have the
Meter serviced.
⇒ Always use the proper terminals, switch position, and range for measurements.
⇒ Verify the Meter’s operation by measuring a known voltage.
⇒ Do not apply more than the rated voltage, as marked on the Meter, between the terminals or between any terminal and earth
ground.
⇒ Use caution with voltages above 30 V ac rms, 42 V ac peak, or 60 V dc. These voltages pose a shock hazard.
⇒ Replace the battery as soon as the low battery indicator (
b ) appears.
⇒ Disconnect circuit power and discharge all high-voltage capacitors before testing resistance, continuity, diodes, or
capacitance.
⇒ Do not use the Meter around explosive gas or vapor.
⇒ When using the test leads, keep your fingers behind the finger guards.
⇒ Remove test leads from the Meter before opening the Meter case or battery door.
Symbols
B
AC (Alternating Current)
I
Fuse
F
DC (Direct Current)
Conforms to European Union directives
F
B
DC/AC
Canadian Standards Association
Earth ground
T
Double insulated
Important Information; see manual Underwriters Laboratories, Inc.
Meter in accordance with IEC 61010-1. 54CJ
b
Battery (Low battery when shown on
display.)
;
N10140
Conforms to relevant Australian standards
Inspected and licensed by TÜV
(Technischer Überwachungs Verein)
Product Services
VDE (Verband Deutscher Electroniker)