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 (
⇒ 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.
B
F
F
B
J
W
b
s
AC (Alternating Current)
DC (Direct Current)
DC/AC
Earth ground
Important Information; see manual
Battery (Low battery when shown on
display.)
Inspected and licensed by TÜV
(Technischer Überwachungs Verein)
Product Services
b ) appears.
Symbols
I
P
$
T
!
;
#
Fuse
Conforms to European Union directives
Canadian Standards Association
Double insulated
Underwriters Laboratories, Inc.
Meter in accordance with IEC 61010-1. 54CJ
Conforms to relevant Australian standards
The Meter enters the "Sleep mode" and blanks the display if there
is no function change or button press for 20 minutes. To disable
the Sleep mode, hold down the YELLOW button while turning the
Meter on. The Sleep mode is always disabled in the MIN MAX
AVG mode and the AutoHOLD mode.
Terminals
.
1
V
FUSED
2
Item Description
Input terminal for AC and DC milliamp measurements to
1
400 mA and frequency measurements.
Input terminal for AC and DC current measurements to
2
10 A and frequency measurements.
Input terminal for voltage, continuity, resistance, diode,
3
capacitance, frequency, and temperature (Model 179
only) measurements.
Common (return) terminal for all measurements.
4
3
4
AIK01F.EPS
Rotary Switch Positions
Switch
Position
AC voltage from 30.0 mV to 1000 V.
K
Hz
Hz
m
E
R
G
F
mA
Hz
F
BA
Hz
Note: AC voltage and current AC-coupled, true RMS, up to 1 kHz.
Frequency from 2 Hz to 99.99 kHz.
DC voltage 1 mV to 1000 V.
L
Frequency from 2 Hz to 99.99 kHz.
DC mV 0.1 mV to 600 mV.
L
Temperature − 40 °C to + 400 °C
T
Ohms from 0.1 Ω to 50 MΩ.
e
Farads from 1 nF to 9999 μF.
Beeper turns on at <25 Ω and turns off at >250 Ω.
Diode test. Displays OL above 2.4 V.
B
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.
AC A from 0.300 A to 10 A
DC A from 0.001 A to 10 A
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 Meter 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.
To use MIN MAX AVG recording:
⇒ Make sure that the Meter is in the desired measurement
function and range. (Autoranging is disabled in the MIN MAX
AVG mode.)
⇒ Press MIN MAX to activate MIN MAX AVG mode.
and MAX light, and the highest reading detected
since entering MIN MAX AVG is displayed.
⇒ Press MIN MAX to step through the low (MIN), average
(AVG), and present readings.
⇒ To pause MIN MAX AVG recording without erasing stored
values, press HOLD. h is displayed.
To resume MIN MAX AVG recording, press HOLD again.
h turns off.
⇒ To exit and erase stored readings, press MIN MAX for 1
second or turn the rotary switch.
±
12 counts for changes longer than
±
40 counts for changes longer than
Display HOLD and AutoHOLD Modes
XW Warning
To avoid electric shock, 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 Meter holds the reading on the
display.
In the AutoHOLD mode, the Meter holds the reading on the display
it detects a new stable reading. Then the Meter beeps and
until
displays the new reading.
⇒ Press HOLD to activate Display HOLD. h lights.
⇒ Press HOLD again to activate AutoHOLD. Ah lights.
⇒ Press HOLD again to resume normal operation.
To resume normal operation at any time, press HOLD for 1
second or turn the rotary switch.
YELLOW Button
Press the YELLOWbutton to select alternate measurement
functions on a rotary switch setting, e.g., to select DC mA, DC A,
Hz, temperature (Model 179 only), capacitance, diode test.
Display Backlight (Model 177 and 179 Only)
Press S to toggle the backlight on and off. The backlight
automatically turns off after 2 minutes.
The figures on the following pages show how to make basic
measurements.
When connecting the test leads to the circuit or device, connect
the common (COM) test lead before connecting the live lead;
when removing the test leads, remove the live lead before
removing the common test lead.
XW Warning
To avoid electric shock, injury, or damage to the Meter,
disconnect circuit power and discharge all high-voltage
capacitors before testing resistance, continuity, diodes,
or capacitance.
measurement when the open-circuit potential to earth
is >1000 V.
• Check the Meter's fuses before testing. (See “Testing
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.
Turn power OFF, break circuit, insert Meter in series, turn power
on.
DC
MIN MAX
RANGEHOLD
mA
+
+
A
CATCAT
AIK08F.EPS
Understanding 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:
To avoid electrical shock, disregard the bar graph for
frequencies > 1 kHz. If the frequency of the measured
signal is > 1 kHz, the bar graph is unspecified.
The Meter measures the frequency of a signal. The trigger level is
0 V, 0 A AC for all ranges.
AC/DC Voltage FrequencyAC Current Frequency
Hzx 2
MIN MAX
RANGEHOLD
V
V
+
Hz
+
MIN MAX
RANGEHOLD
mA
A
AIK09F.EPS
⇒ To exit frequency, press YELLOW button or turn the rotary
switch.
⇒ 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.
Using 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, 15, 30, 45, and 60 V. An input of −30 V
lights the negative sign and the segments up to the middle of the
scale.
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 DC or AC RMS
Surge Protection: 8 kV peak per IEC 61010
W Fuse for mA inputs:
W Fuse for A input:
Display: Digital: 6000 counts, updates 4/sec
Altitude: Operating: 2000 m; Storage: 12,000 m
Temperature: Operating: −10 °C to +50 °C;
Temperature coefficient: 0.1 X (specified accuracy / °C
Electromagnetic
Compatibility
(EN 61326-1:1997):
Relative Humidity: Maximum Noncondensing
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 Compliances: ANSI/ISA S82.02.01, CSA C22.2-1010.1, IEC 61010 to 1000 V Measurement Category III, 600 V Measurement
DC mV 600.0 mV 0.1 mV 0.15 % + 2 0.09 % + 2 0.09 % + 2
DC Volts
1000 V 1 V 0.15 % + 2 0.15 % + 2 0.15 % + 2
Continuity 600 Ω 1 Ω Meter beeps at < 25 Ω, beeper turns off at > 250 Ω; detects opens or shorts of 250 μs or
Ohms
Diode test 2.400 V 0.001 V 1 % + 2
Capacitance 1000 nF
AC Amps
(True RMS)
(45 Hz to 1
kHz)
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.