Fluke 177, 175 Operating Manual

May 2003 Rev. 2, 10/15
© 2003-2015 Fluke Corporation. All rights reserved. Specifications are subject to change without notice.
All product names are trademarks of their respective companies.

175, 177, 179

True-rms Multimeters

Users Manual

Lifetime Limited Warranty

Each Fluke 20, 70, 80, 170 and 180 Series DMM will be free from defects in material and workmanship for its lifetime. As used herein, “life­time” is defined as seven years after Fluke discontinues manufacturing the product, but the warranty period shall be at least ten years from
the date of purchase. This warranty does not cover fuses, disposable batteries, damage from neglect, misuse, contamination, alteration,
accident or abnormal conditions of operation or handling, including failures caused by use outside of the product’s specifications, or normal
wear and tear of mechanical components. This warranty covers the original purchaser only and is not transferable.

For ten years from the date of purchase, this warranty also covers the LCD. Thereafter, for the lifetime of the DMM, Fluke will replace the
LCD for a fee based on then current component acquisition costs.

To establish original ownership and prove date of purchase, please complete and return the registration card accompanying the product, or
register your product on http://www.fluke.com. Fluke will, at its option, repair at no charge, replace or refund the purchase price of a defective
product purchased through a Fluke authorized sales outlet and at the applicable international price. Fluke reserves the right to charge for
importation costs of repair/replacement parts if the product purchased in one country is sent for repair elsewhere.

If the product is defective, contact your nearest Fluke authorized service center to obtain return authorization information, then send the
product to that service center, with a description of the difficulty, postage and insurance prepaid (FOB Destination). Fluke assumes no risk
for damage in transit. Fluke will pay return transportation for product repaired or replaced in-warranty. Before making any non-warranty re­pair, Fluke will estimate cost and obtain authorization, then invoice you for repair and return transportation.

THIS WARRANTY IS YOUR ONLY REMEDY. NO OTHER WARRANTIES, SUCH AS FITNESS FOR A PARTICULAR PURPOSE, ARE
EXPRESSED OR IMPLIED. FLUKE SHALL NOT BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAM­AGES OR LOSSES, INCLUDING LOSS OF DATA, ARISING FROM ANY CAUSE OR THEORY. AUTHORIZED RESELLERS ARE NOT
AUTHORIZED TO EXTEND ANY DIFFERENT WARRANTY ON FLUKE’S BEHALF. Since some states do not allow the exclusion or limita­tion of an implied warranty or of incidental or consequential damages, this limitation of liability may not apply to you. If any provision of this
warranty is held invalid or unenforceable by a court or other decision-maker of competent jurisdiction, such holding will not affect the validity
or enforceability of any other provision.

Fluke Corporation Fluke Europe B.V.
P.O. Box 9090 P.O. Box 1186
Everett, WA 98206-9090 5602 BD Eindhoven
U.S.A. The Netherlands

2/02

Table of Contents

Title Page

Introduction .............................................................................................................................. 1

How to Contact Fluke .............................................................................................................. 1

Safety Information .................................................................................................................... 1

Symbols ................................................................................................................................... 3

Unsafe Voltage ........................................................................................................................ 5

Test Lead Alert ........................................................................................................................ 5

Terminals ................................................................................................................................. 5

Product Buttons ....................................................................................................................... 6

Rotary Switch Positions ........................................................................................................... 6

Display ..................................................................................................................................... 7

Battery Saver (Sleep Mode) .................................................................................................... 9

MIN MAX AVG Recording Mode ............................................................................................. 9

Display HOLD and AutoHOLD Modes ..................................................................................... 10

Manual Range and Autorange ................................................................................................. 10

Power-Up Options ................................................................................................................... 11

Basic Measurements ............................................................................................................... 11

Measure AC and DC Voltage ............................................................................................. 12

Measure Resistance ........................................................................................................... 12

Measure Capacitance ......................................................................................................... 12

Test for Continuity............................................................................................................... 13

Measure Temperature (179 Only) ...................................................................................... 13

Test Diodes ......................................................................................................................... 13

Measure AC or DC Current ................................................................................................ 14

AC Zero Input Behavior of True-rms Meters ...................................................................... 14

Measure Frequency ............................................................................................................ 15

AC/DC Voltage Frequency ................................................................................................. 15

AC Current Frequency ........................................................................................................ 15

Use the Bar Graph ................................................................................................................... 16

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Users Manual

Maintenance ............................................................................................................................ 16

Clean the Product ............................................................................................................... 17

Test the Fuses .................................................................................................................... 17

Replace the Battery and Fuses .......................................................................................... 17

Specifications ........................................................................................................................... 18

Electrical Specifications ........................................................................................................... 20

ii

Introduction

The Fluke 175, 177, and 179 are battery-powered, True-rms
multimeters (the Product) with a 6000-count, 3 3/4-digit display
and a bar graph. This manual applies to all three models. All
figures show the 179.

How to Contact Fluke

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

• Technical Support USA: 1-800-44-FLUKE (1-800-443-5853)

• Calibration/Repair USA: 1-888-99-FLUKE (1-888-993-5853)

• Canada: 1-800-36-FLUKE (1-800-363-5853)

• Europe: [phone]

• Japan: [phone]

• Russia: [phone]

• Singapore: [phone]

• Anywhere in the world: [phone]

Or, visit Fluke's website at www.fluke.com.

To register your product, visit http://register.fluke.com.

To view, print, or download the latest manual supplement, visit

http://us.fluke.com/usen/support/manuals.

Safety Information

In this manual, a Warning identifies conditions and procedures
that are dangerous to the user. A Caution identifies conditions
and procedures that can cause damage to the Product or the
equipment under test.

XW Warning

To prevent possible electrical shock, fire, or personal
injury:

• Read all safety information before you use the

Product.

• Carefully read all instructions.

• Use the Product only as specified, or the protection

supplied by the Product can be compromised.

1

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Users Manual

• Examine the case before you use the Product. Look

for cracks or missing plastic. Carefully look at the
insulation around the terminals.

• Do not use the Product around explosive gas, vapor,

or in damp or wet environments.

• Do not work alone.

• Limit operation to the specified measurement

category, voltage, or amperage ratings.

• Comply with local and national safety codes. Use

personal protective equipment (approved rubber
gloves, face protection, and flame-resistant clothes)
to prevent shock and arc blast injury where
hazardous live conductors are exposed.

• Use Product-approved measurement category (CAT),

voltage, and amperage rated accessories (probes,
test leads, and adapters) for all measurements.

• Do not exceed the Measurement Category (CAT)

rating of the lowest rated individual component of a
Product, probe, or accessory.

• Do not touch voltages >30 V ac rms, 42 V ac peak, or

60 V dc.

• Keep fingers behind the finger guards on the probes.

• Use only current probes, test leads, and adapters

supplied with the Product.

• Connect the common test lead before the live test

lead and remove the live test lead before the
common test lead.

• Disable the Product if it is damaged.

• Do not use the Product if it is damaged.

• Do not use the Product if it operates incorrectly.

• Only use probes, test leads, and accessories that

have the same measurement category, voltage, and
amperage ratings as the Product.

• Remove the batteries if the Product is not used for an

extended period of time, or if stored in temperatures
above 50 °C. If the batteries are not removed, battery
leakage can damage the Product.

2

True-rms Multimeters
Symbols

• The battery door must be closed and locked before

you operate the Product.

• Use only cables with correct voltage ratings.

• Remove all probes, test leads, and accessories

before the battery door is opened.

• Replace the batteries when the low battery indicator

shows to prevent incorrect measurements.

• Do not apply more than the rated voltage, between

the terminals or between each terminal and earth
ground.

• Measure a known voltage first to make sure that the

Product operates correctly.

• Use the correct terminals, function, and range for

measurements.

• Do not use test leads if they are damaged. Examine

the test leads for damaged insulation, exposed metal,
or if the wear indicator shows. Check test lead
continuity.

• Do not touch the probes to a voltage source when

the test leads are connected to the current terminals.

• Do not use test leads if they are damaged. Examine

the test leads for damaged insulation and measure a
known voltage.

• Do not use in CAT III or CAT IV environments without

the protective cap installed on test probe. The
protective cap decreases the exposed probe metal to
<4 mm. This decreases the possibility of arc flash
from short circuits.

Symbols

Table 1 is a list of the symbols used on the Product and in this
manual.

Table 1. Symbols

Symbol Description

 Consult user documentation.

W WARNING. RISK OF DANGER.

X

WARNING. HAZARDOUS VOLTAGE. Risk of
electric shock.

 Earth

AC (Alternating Current)



DC (Direct Current)



Both direct and alternating current



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Users Manual

Table 1. Symbols (cont.)

Symbol Description

 Earth




Capacitance

Fuse

P Conforms to European Union directives.
T Double Insulated





Low battery. Replace battery.

Minimum fuse interrupt rating.

R Continuity test or continuity beeper tone.

P Conforms to European Union directives.

)

Certified by CSA Group to North American safety
standards.

 Certified by TÜV SÜD Product Service.



Ã

Conforms to relevant Australian Safety and EMC
standards.

Conforms to relevant South Korean EMC
Standards.

Table 1. Symbols (cont.)

Symbol Description

Measurement Category II is applicable to test and







~

measuring circuits connected directly to utilization
points (socket outlets and similar points) of the
low-voltage MAINS installation.

Measurement Category III is applicable to test and
measuring circuits connected to the distribution
part of the building’s low-voltage MAINS
installation.

Measurement Category IV is applicable to test and
measuring circuits connected at the source of the
building’s low-voltage MAINS installation.

This product complies with the WEEE Directive
marking requirements. The affixed label indicates
that you must not discard this electrical/electronic
product in domestic household waste. Product
Category: With reference to the equipment types in
the WEEE Directive Annex I, this product is
classed as category 9 "Monitoring and Control
Instrumentation" product. Do not dispose of this
product as unsorted municipal waste.

4

True-rms Multimeters
Unsafe Voltage

Unsafe Voltage

During a voltage measurement, the Product alerts you to the
presence of a potentially hazardous voltage. When the Product
detects a voltage ≥30 V or a voltage overload (), the
shows on the display to alert you to the presence of a potentially
hazardous voltage.

Y symbol

Test Lead Alert

To remind you to check that the test leads are in the correct
terminals,  momentarily shows on the display when you move
the rotary switch to or from the mA or A position.

XW Warning

Attempting to make a measurement with a test lead in an
incorrect terminal might blow a fuse, damage the
Product, and cause serious personal injury.

Terminals

Table 2 shows the terminals on the Product.

Table 2. Terminals

1

V

FUSED

2

Item Description

Input terminal for ac and dc milliamp measurements to



400 mA and frequency measurements.

Input terminal for ac and dc current measurements to



10 A and frequency measurements.

Input terminal for voltage, continuity, resistance, diode,



capacitance, frequency, and temperature (179 only)
measurements.

 Common (return) terminal for all measurements.

3

4

aik01f.eps

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Users Manual

Product Buttons

Table 3 identifies the basic functions of the buttons on the Product.
The buttons have other functions described later in the manual.

Table 3. Product Buttons

MIN MAX

RANGEHOLD

1 2 3 4 5

Item Description

Toggles the backlight on and off. The backlight



automatically turns off after 2 minutes (177 and 179
only).

In MIN MAX AVG mode, push to pause or continue
MIN MAX AVG recording.

In the Display HOLD mode, the Product holds the
reading on the display.



In the AutoHOLD mode, the Product holds the
reading on the display until it detects a new stable
reading. Then the Product beeps and displays the
new reading.

aik14.eps

Table 3. Product Buttons

Item Description

 Activates MIN MAX AVG mode.

Toggles between Auto Range and Manual Range
modes.



In Manual Range mode, increments the range. After
the highest range, the Product wraps to the lowest
range.

(Yellow button) Selects alternate measurement
functions on a rotary switch setting, for example, to



select dc mA, dc A, Hz, temperature (179 only),
capacitance, diode test.

Rotary Switch Positions

Table 4 identifies the switch positions on the Product.

Table 4. Rotary Switch Positions

Switch

Position



Hz



Hz

AC voltage from 30.0 mV to 1000 V.
Frequency from 2 Hz to 99.99 kHz.
DC voltage 1 mV to 1000 V.
Frequency from 2 Hz to 99.99 kHz.

Measurement Function

6

True-rms Multimeters
Display

Table 4. Rotary Switch Positions

Switch

Position





R





A

DC mV 0.1 mV to 600 mV.
Temperature −40 °C to +400 °C.

−40 °F to +752 °F.
Beeper turns on at <25 Ω and turns off at >250 Ω.

Diode test. Displays  above 2.4 V.
AC A from 0.300 A to 10 A.

DC A from 0.001 A to 10 A.

Measurement Function

>10.00, display flashes.
>20 A,  is displayed.

Hz

e





mA

Hz

Note: AC voltage and current AC-coupled, true-rms, up to 1 kHz.

Frequency of ac A 2 Hz to 30 kHz.
Ohms from 0.1 Ω to 50 MΩ.
Farads from 1 nF to 9999 μF.
AC mA from 3.00 mA to 400 mA.
DC mA from 0.01 mA to 400 mA.
Frequency of ac mA 2 Hz to 30 kHz.

Display

Table 5 shows the items on the Product display.

Table 5. Display

5

4

3

2

1

13

12

14

Item Symbol Description

  Continuity test.
  Diode test.
  Negative readings.

 Y

6

11

Unsafe voltage. Voltage ≥30 V, or
voltage overload ().

7

8

7

9

10

15

aik02f.eps

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Users Manual

Table 5. Display (cont.)

Item Symbol Description













 DC, AC Direct current, alternating current.
  Low battery. Replace battery.
 610000mV All possible ranges.
 Bar graph Analog display.

MAX, MIN,

AVG

nμ F, °F, °C
mVA, Mke,

kHz

Display HOLD is enabled. Display
freezes present reading.

In MIN MAX AVG mode, MIN MAX
AVG recording is interrupted.

AutoHOLD is enabled. Display holds
present reading until it detects new
stable input. Then the Product beeps
and displays the new reading.

MIN MAX AVG enabled.
Maximum, minimum, average or

present reading.

Measurement units.

Table 5. Display (cont.)

Item Symbol Description




  The input out of range.

 

Table 6 identifies error messages that can show on the display.

Error Description

 Replace the battery immediately.









 Open thermocouple is detected.

Auto Range

Manual Range

±

Table 6. Error Messages

In the capacitance function, too much electrical charge
is present on the capacitor being tested.

Invalid EEPROM data. Have Product serviced.

Invalid calibration data. Calibrate Product.

The Product selects the range with
the best resolution.

The user selects the range.
Bar graph polarity.

W

Test lead alert. Displayed when
the rotary switch is moved to or
from the mA or A position.

8

True-rms Multimeters
Battery Saver (Sleep Mode)

Battery Saver (Sleep Mode)

The Product enters the Sleep mode and the display goes blank if
there is no function change or button press for 20 minutes. To
disable the Sleep mode, hold down
on. The Sleep mode is always disabled in the MIN MAX AVG
mode and the AutoHOLD mode.

 while turning the Product

MIN MAX AVG Recording Mode

The MIN MAX AVG recording mode captures the minimum and
maximum input values and calculates a running average of all
readings. When a new high or low is detected, the Product beeps.

Note

For dc functions, accuracy is the specified accuracy of the
measurement function
350 ms in duration.

For ac functions, accuracy is the specified accuracy of the
measurement function
900 ms in duration.

±

12 counts for changes longer than

±

40 counts for changes longer than

To use MIN MAX AVG recording:

1. Set the desired measurement function and range.
(Autoranging is disabled in the MIN MAX AVG mode.)

2. Press

3. To step through the low (MIN), average (AVG), and present

4. To pause MIN MAX AVG recording without erasing stored

5. To continue MIN MAX AVG recording, press

6. To erase stored readings and exit, press

 to activate MIN MAX AVG mode.

 and MAX come on, and the highest reading detected

since entering MIN MAX AVG shows on the display.

readings, press

values, press

 comes on.

.

.

 again.

 turns off.

 for 1 second or

turn the rotary switch.

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Users Manual

Display HOLD and AutoHOLD Modes

XW Warning

To avoid electric shock, fire, or personal injury, do not
use the Display HOLD or AutoHOLD mode to determine
if a circuit is live. Unstable or noisy readings will not be
captured.

In the Display HOLD mode, the Product holds the reading on the
display.

In the AutoHOLD mode, the Product holds the reading on the
display until it detects a new stable reading. Then the Product
beeps and displays the new reading.

1. Press

2. Press

3. To continue normal operation at any time, press

 to activate Display HOLD.

 comes on.

 again to activate AutoHOLD.

 shows on the display.

 for

1 second or turn the rotary switch.

Manual Range and Autorange

The Product has both Manual range and Autorange modes.

• In the Autorange mode, the Product selects the range with
the best resolution.

• In the Manual Range mode, override Autorange and select
the range yourself.

When you turn the Product on, it defaults to Autorange and Auto
Range shows.

1. To enter the Manual Range mode, press .

Manual Range shows.

2. In the Manual Range mode, press  to increment the
range. After the highest range, the Product wraps to the lowest
range.

Note

You cannot manually change the range in the MIN MAX
AVG, or Display HOLD modes.

If you press  while in MIN MAX AVG, or Display HOLD,
the Product beeps twice, indicating an invalid operation,
and the range does not change.

10

True-rms Multimeters
Power-Up Options

3. To exit Manual Range, press  for 1 second or turn the
rotary switch.

The Product returns to Autorange and Auto Range shows.

Power-Up Options

Table 7 shows the Power-Up Options. To select a Power-Up
Option, hold down the button indicated while turning the Product
from OFF to any switch position.

Power-Up Options are cancelled when the Product is turned OFF.

Table 7. Power-Up Options

Button Power-Up Options

AutoHOLD











 switch position turns on all LCD segments.
 switch position displays the software version

number.

 switch position displays the model number.

Disables beeper. ()

Enables "Smoothing" mode. ()
Dampens display fluctuations of rapidly changing

inputs by digital filtering.
(Yellow button) Disables automatic power-down

(Sleep mode). ()
Sleep mode is also disabled while the Product is in

a MIN MAX AVG Recording mode, or the
AutoHOLD mode.

Disables automatic 2-minute backlight timeout.
() (177 and 179 Only)

Basic Measurements

The figures on the following pages show how to make basic
measurements.

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Users Manual

XW Warning

To avoid electric shock, fire, or personal injury:

• Connect the common test lead before the live test

lead and remove the live test lead before the
common test lead.

• Disconnect power and discharge all high-voltage

capacitors before you measure resistance,
continuity, capacitance, or a diode junction.

Measure AC and DC Voltage

Volts AC

MIN MAX

RANGEHOLD

V

V

Volts DC

MIN MAX

+

Millivolts DC

RANGEHOLD

mV

_

+

MIN MAX

RANGEHOLD

AIK03F.EPS

Measure Resistance

MIN MAX

RANGEHOLD

AIK04F.EPS

Measure Capacitance

MIN MAX

RANGEHOLD

_

+

_

+

AIK05F.EPS

12

True-rms Multimeters
Basic Measurements

Test for Continuity

MIN MAX

RANGEHOLD

Measure Temperature (179 Only)

MIN MAX

RANGEHOLD

RANGE

80BK-A Integrated

Type K DMM

Temperature Probe

XW

Warning: Do not connect 80BK-A to live circuits.

MIN MAX

Vent

or

Pipe

Test Diodes

Good Diode Good Diode

RANGEHOLD

AIK06F.EPS

AIK10F.EPS

MIN MAX

RANGEHOLD

+

Forward Bias

Bad Diode

MIN MAX

RANGEHOLD

CAT

+

Open

MIN MAX

RANGEHOLD

__

+

Single Beep

Reverse Bias

Bad Diode

MIN MAX

RANGEHOLD

_

+

_

and

Shorted

AIK07F.EPS

13

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Users Manual

Measure AC or DC Current

XW Warning

To prevent possible electrical shock, fire, or personal
injury:

• Never attempt to make an in-circuit current

measurement when the open-circuit potential to
earth is >1000 V.

• Check the Product's fuses before testing. (See Test

the Fuses.)

• Use the proper terminals, switch position, and range

for your measurement.

• Never place the probes in parallel with a circuit or

component when the leads are plugged into the
current terminals.

To measure current:

1. Turn power OFF.

2. Break circuit.

3. Insert Product in series.

4. Turn power on.

DC

MIN MAX

RANGEHOLD

mA

+

+

A

CAT
CAT

aik08f.eps

AC Zero Input Behavior of True-rms Meters

Unlike averaging meters, which can accurately measure only pure
sinewaves, True-rms meters accurately measure distorted
waveforms. Calculating True-rms converters require a certain level
of input voltage to make a measurement. This is why ac voltage
and current ranges are specified from 5 % of range to 100 % of
range. Non-zero digits that are displayed on a True-rms meter
when the test leads are open or are shorted are normal. They do
not affect the specified ac accuracy above 5 % of range.

Unspecified input levels on the lowest ranges are:

• AC voltage: below 5 % of 600 mV ac, or 30 mV ac

• AC current: below 5 % of 60 mA ac, or 3 mA ac

14

True-rms Multimeters
Basic Measurements

Measure Frequency

XW Warning

To prevent possible electrical shock, fire, or personal
injury, disregard the bar graph for frequencies >1 kHz. If
the frequency of the measured signal is >1 kHz, the bar
graph is unspecified.

The Product measures the frequency of a signal. The trigger level
is 0 V, 0 A ac for all ranges.

AC/DC Voltage Frequency

MIN MAX

RANGEHOLD

V

+

Hz

aik15.eps

AC Current Frequency

• In frequency, the bar graph shows the ac/dc voltage or ac
current accurately up to 1 kHz.

• Select progressively lower ranges using manual ranging for a
stable reading.

• To exit frequency, press  or turn the rotary switch.

Hzx 2

MIN MAX

RANGEHOLD

mA

+

A

aik16.eps

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Users Manual

Use the Bar Graph

The bar graph is like the needle on an analog meter. It has an
overload indicator () to the right and a polarity indicator (±) to the
left.

Because the bar graph updates about 40 times per second, which
is 10 times faster than the digital display, the bar graph is useful
for making peak and null adjustments and for observing rapidly
changing inputs.

The bar graph is disabled when measuring capacitance or
temperature. In frequency, the bar graph accurately indicates the
voltage or current up to 1 kHz.

The number of lit segments indicates the measured value and is
relative to the full-scale value of the selected range.

In the 60 V range, for example (see below), the major divisions on
the scale represent 0 V, 15 V, 30 V, 45 V, and 60 V. An input of

−30 V lights the negative sign and the segments up to the middle
of the scale.

AIK11F.EPS

Maintenance

XW Warning

To prevent possible electrical shock, fire, personal
injury, or damage to the Product:

• Repair the Product before use if the battery leaks.

• Do not operate the Product with covers removed or

the case open. Hazardous voltage exposure is
possible.

• Remove the input signals before you clean the

Product.

• Use only specified replacement parts.

• Have an approved technician repair the Product.

• Use only specified replacement fuses.

• Replace a blown fuse with exact replacement only for

continued protection against arc flash.

16

True-rms Multimeters
Maintenance

Clean the Product

Wipe the case with a damp cloth and mild detergent. Do not use
abrasives or solvents. Dirt or moisture in the terminals can affect
readings.

Test the Fuses

Test fuses as shown below.

11 A 440 mA

Ω

<12

MIN MAX

RANGEHOLD

V

OK

<.5

Ω

OKOK

OK

AIK12F.EPS

Replace the Battery and Fuses

XW Warning

To prevent possible electrical shock, fire, personal
injury, or damage to the Product:

• Remove the test leads and any input signals before

replacing the fuse.

• Use ONLY fuses with the amperage, interrupt,

voltage, and speed ratings specified.

• Replace the battery as soon as the low battery

indicator () appears.

Table 8 lists the replacement battery and fuses.

17

175, 177, 179

Users Manual

Table 8. Replacement Battery and Fuses

B1

F1

F2

Item Part Number

W F1 Fuse, 440 mA, 1000 V, FAST 943121
W F2 Fuse, 11 A, 1000 V, FAST 803293

B1 Battery, 9 V Alkaline
NEDA 1604 / 1604A

614487

aik13f2.eps

Specifications

Accuracy is specified for 1 yr after calibration, at operating
temperatures of 18 °C to 28 °C, with relative humidity at 0 % to
90 %. Accuracy specifications take the form of: ±([% of Reading] +
[Counts])

Maximum voltage between any

terminal and earth ground ................. 1000 V

W Fuse Protection for mA inputs ..... 0.44 A, 1000 V, IR 10 kA

W Fuse Protection for A input .......... 11 A, 1000 V, IR 17 kA

Display ................................................ Digital: 6000 counts, updates 4/sec

Bar Graph........................................ 33 segments, Updates 40x/sec

Frequency ....................................... 10,000 counts

Capacitance .................................... 1000 counts

Altitude

Operating ........................................ 2000 m

Storage ........................................... 12,000 m

Temperature

Operating ........................................ −10 °C to +50 °C

Storage ........................................... −40 °C to +60 °C

Temperature coefficient .................... 0.1 X (specified accuracy / °C,

(<18 °C or >28 °C)

18

True-rms Multimeters
Specifications

Relative Humidity .............................Maximum Non-condensing:

Battery Life .......................................Alkaline: 400 hrs typical

Size (H x W x L) ................................4.3 cm x 9 cm x 18.5 cm

Weight ...............................................420 g

Safety

General .........................................IEC 61010-1: Pollution Degree 2

Measurement ................................IEC 61010-2-033: CAT IV 600 V,

Electromagnetic Compatibility (EMC)

International ..................................IEC 61326-1: Portable

Group 1: Equipment has intentionally generated and/or uses
conductively-coupled radio frequency energy that is necessary for the
internal function of the equipment itself.

90 % to 35 °C,
75 % to 40 °C,
45 % to 50 °C

CAT III 1000 V

Electromagnetic Environment
CISPR 11: Group 1, Class A,
IEC 61326-2-2

Class A: Equipment is suitable for use in all establishments other than
domestic and those directly connected to a low-voltage power supply
network that supplies buildings used for domestic purposes. There
may be potential difficulties in ensuring electromagnetic compatibility
in other environments due to conducted and radiated disturbances.

Emissions that exceed the levels required by CISPR 11 can occur
when the equipment is connected to a test object. The equipment
may not meet the immunity requirements of this standard when test
leads and/or test probes are connected.

Korea (KCC) ..................................Class A Equipment (Industrial

Class A: Equipment meets requirements for industrial electromagnetic
wave equipment and the seller or user should take notice of it. This
equipment is intended for use in business environments and not to be
used in homes.

USA (FCC) ....................................47 CFR 15 subpart B. This product is

Broadcasting & Communication
Equipment)

considered an exempt device per
clause 15.103.

19

175, 177, 179

Users Manual

Electrical Specifications

Function Range

[2] [3]

AC Volts

DC mV 600.0 mV 0.1 mV 0.15 % + 2 0.09 % + 2 0.09 % + 2

DC Volts

Continuity 600 Ω 1 Ω

Ohms

[1]

Resolution

600.0 mV

6.000 V

60.00 V

600.0 V

1000 V

6.000 V

60.00 V

600.0 V

1000 V 1 V 0.15 % + 2 0.15 % + 2 0.15 % + 2

600.0 Ω

6.000 kΩ

60.00 kΩ

600.0 kΩ

6.000 MΩ

50.00 MΩ

0.1 mV

0.001 V

0.01 V

0.1 V

1 V

0.001 V

0.01 V

0.1 V

0.1 Ω

0.001 kΩ

0.01 kΩ

0.1 kΩ

0.001 MΩ

0.01 MΩ

1.0 % + 3

(45 Hz to 500 Hz)

2.0 % + 3

(500 Hz to 1 kHz)

0.15 % + 2 0.09 % + 2 0.09 % + 2

Product beeps at <25 Ω, beeper turns off at >250 Ω; detects opens or shorts of
250 μs or longer.

0.9 % + 2

0.9 % + 1

0.9 % + 1

0.9 % + 1

0.9 % + 1

1.5 % + 3

Accuracy ±( [ % of Reading ] + [ Counts ] )

175 177 179

1.0 % + 3

(45 Hz to 500 Hz)

2.0 % + 3

(500 Hz to 1 kHz)

0.9 % + 2

0.9 % + 1

0.9 % + 1

0.9 % + 1

0.9 % + 1

1.5 % + 3

1.0 % + 3

(45 Hz to 500 Hz)

2.0 % + 3

(500 Hz to 1 kHz)

0.9 % + 2

0.9 % + 1

0.9 % + 1

0.9 % + 1

0.9 % + 1

1.5 % + 3

20

True-rms Multimeters
Electrical Specifications

Function Range

[1]

Resolution

Accuracy ±( [ % of Reading ] + [ Counts ] )

175 177 179

Diode test 2.400 V 0.001 V 1 % + 2

Capacitance

AC Amps

[5]

(True-rms)
(45 Hz to 1 kHz)

DC Amps

[5]

Hz
(AC- or DC- coupled,

[8] [9]

V or A

input )

1000 nF

10.00 μF

100.0 μF

[4]

9999 μF

60.00 mA

400.0 mA

6.000 A

[7]

10.00 A

60.00 mA

400.0 mA

6.000 A

10.00 A

99.99 Hz

999.9 Hz

9.999 kHz

99.99 kHz

1 nF

0.01 μF

0.1 μF
1 μF

0.01 mA

[6]

0.1 mA

0.001 A

0.01 A

0.01 mA

[6]

0.1 mA

0.001 A

[7]

0.01 A

0.01 Hz

0.1 Hz

0.001 kHz

0.01 kHz

1.2 % + 2

1.2 % + 2

1.2 % + 2

10 % typical

1.2 % + 2

1.2 % + 2

1.2 % + 2

10 % typical

1.5 % + 3 1.5 % + 3 1.5 % + 3

1.0 % + 3 1.0 % + 3 1.0 % + 3

0.1 % + 1 0.1 % + 1 0.1 % + 1

1.2 % + 2

1.2 % + 2

1.2 % + 2

10 % typical

21

175, 177, 179

Users Manual

Function Range

Temperature

[10]

-40 °C to +400 °C

-40 °F to +752 °F

[1]

Resolution

0.1 °C

0.1 °F

For dc functions, accuracy is the specified accuracy of the measurement function ±12 counts for changes longer than 350 ms in

MIN MAX AVG

duration.
For ac functions, accuracy is the specified accuracy of the measurement function ±40 counts for changes longer than 900 ms in

duration.
[1] All ac voltage and ac current ranges are specified from 5 % of range to 100 % of range.
[2] Crest factor of ≤3 at full scale up to 500 V, decreasing linearly to crest factor ≤1.5 at 1000 V.
[3] For non-sinusoidal waveforms, add -(2 % reading + 2 % full scale) typical, for crest factors up to 3.
[4] In the 9999 μF range for measurements to 1000 μF, the measurement accuracy is 1.2 % + 2 for all models.
[5] Amps input burden voltage (typical): 400 mA input 2 mV/mA, 10 A input 37 mV/A.
[6] 400.0 mA accuracy specified up to 600 mA overload.
[7] >10 A unspecified.
[8] Frequency is specified from 2 Hz to 99.99 kHz in Volts and from 2 Hz to 30 kHz in Amps.
[9] Below 2 Hz, the display shows zero Hz.
[10] In RF field of 3 V/m specified accuracy ±5 °C (9 °F).
[11] Does not include error of the thermocouple probe.

Accuracy ±( [ % of Reading ] + [ Counts ] )

175 177 179

NA NA

1 % + 10
1 % + 18

[11]

[10]

22

True-rms Multimeters
Electrical Specifications

Input Impedance

Function Overload Protection

[1]

(Nominal)

Volts ac 1000 V rms >10 MΩ < 100 pF >60 dB @ dc, 50 Hz or 60 Hz

Volts dc 1000 V rms >10 MΩ < 100 pF >120 dB @ dc, 50 Hz or 60 Hz >60 dB @ 50 Hz or 60 Hz

mV/ 1000 V rms

Ohms/Capacitance 1000 V rms

Continuity/Diode test 1000 V rms

[2]

>10 MΩ < 100 pF >120 dB @ dc, 50 Hz or 60 Hz >60 dB @ 50 Hz or 60 Hz

Open Circuit Test

Voltage

[2]

<8.0 V dc <660 mV dc <4.6 V dc <1.1 mA

[2]

<8.0 V dc 2.4 V dc <1.1 mA

[1] 107 V-Hz maximum.
[2] For circuits <0.3 A short circuit. 660 V for high energy circuits.

Function Overload Protection Overload

mA Fused, 44/100 A, 1000 V FAST Fuse 600 mA overload for 2 minutes maximum, 10 minutes rest minimum

A Fused, 11 A, 1000 V FAST Fuse 20 A overload for 30 seconds maximum, 10 minutes rest minimum

Common Mode Rejection Ratio

(1 kΩ Unbalanced)

Full Scale Voltage To:

600 kΩ 50 MΩ

Normal Mode Rejection

Short Circuit Current

23

175, 177, 179

Users Manual

Frequency Counter Sensitivity

Input Range

[1] [2]

2 Hz to 45 Hz 45 Hz to 10 kHz 10 kHz to 20 kHz 20 kHz to 50 kHz 50 kHz to 100 kHz

600 mV Unspecified

[3]

80 mV 150 mV 400 mV Unspecified

6 V 0.5 V 0.6 V 1.0 V 2.8 V Unspecified

Volts ac

60 V 5 V 3.8 V 4.1 V 5.6 V 9.6 V

600 V 50 V 36 V 39 V 45 V 58 V

1000 V 500 V 300 V 320 V 380 V NA

6 V 0.5 V 0.75 V 1.4 V 4.0 V Unspecified

Volts dc

60 V 4 V 3.8 V 4.3 V 6.6 V 13 V

600 V 40 V 36 V 39 V 45 V 58 V

1000 V 500 V 300 V 320 V 380 V NA

AC/DC Amps

mA 5 mA 4 mA 4 mA 4 mA

A 0.5 A 0.4 A 0.4 A 0.4 A

[1] Maximum input for specified accuracy = 10X Range or 1000 V.
[2] Noise at low frequency and amplitude may exceed the frequency accuracy specification.
[3] Unspecified but usable depending on quality and amplitude of signal.
[4] In mA and A ranges, frequency measurement is specified to 30 kHz.

Typical Sensitivity (RMS Sine Wave)

[3]

[3]

[3]

[4]

NA

[4]

NA

24