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AC/DC True RMS Clamp Meter
ACM-2056
USER’S MANUAL
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AC/DC True RMS Clamp Meter User Manual
Contents Page
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AC/DC True RMS Clamp Meter User Manual
1.Safety
International Safety Symbols
This symbol, adjacent to another symbol or terminal, indicates
the user must refer to the manual for further information.
This symbol, adjacent to a terminal, indicates that, under
normal use, hazardous voltages may be present.
| Double insulation.
2.Safety Notes
*Do not exceed the maximum allowable input range of any function
*Do not apply voltage to meter when resistance function is selected.
*Set the function switch OFF when the meter is not in use.
Warnings
*Set function switch to the appropriate position before measuring.
*When measuring volts do not switch to current/resistance modes.
* When changing ranges using the selector switch always disconnect
the test leads from the circuit under test.
*Do not exceed the maximum rated input limits.
Cautions
Improper use of this meter can cause damage, shock, injury or death.
Read and understand this user manual before operating the meter.
Always remove the test leads before replacing the battery.
Inspect the condition of the test leads and the meter itself for any
damage before operating the meter. Repair or replace any damage
before use.
Use great care when making measurements if the voltages are greater
than 25VAC rms or 35VDC. These voltages are considered a shock
hazard.
Remove the battery if the meter is to be stored for long periods.
Always discharge capacitors and remove power from the device under
test before performing Diode, Resistance or Continuity tests.
*Voltage checks on electrical outlets can be difficult and misleading
AC/DC True RMS Clamp Meter User Manual
because of the uncertainty of connection to the recessed electrical
contacts. Other means should be used to ensure that the terminals
are not "live".
* |f the equipment is used in a manner not specified by the manufacturer,
the protection provided by the equipment may be impaired.
Input Limits
Function Maximum Input
AACDC oo 1000A
V DC, V AC 1000V DC/AC
Frequency, Resistance, Diode, 1000V DC/AC
Continuity, Capacitance Test
Temperature (°C/°F) | 1000V DC/ AC
3.Meter Description
1-Current clamp
2-Non-contact AC voltage indicator light
3-Clamp trigger
4-Data Hold and Backlight button
5-Rotary Function swith 7
6-Hz% Hlod button
7-RANGE select button
8-Relative/USB Button
9-MIN/MAX Hlod button 2
10-MODE select button
11-LCD display
12-COM input jack 3
13-VQCAP TEMPHz jack
14-Battery Cover
O a
11 — —
12 13
14
AC/DC True RMS Clamp Meter User Manual
HOLD
AUTO
°F and °C
n, m,u, М, К
. 1)
Data Hold AT A
Autoranging
Direct Current nr
Alternating Current pe Mk
Max reading вой
Min reading
Low battery
Relative
Wireless USB
Volts (Voltage)
Ohms (Resistance)
Amperes (Current)
Farad (Capacitance)
Hertz (Frequency)
Duty Ratio
Fahrenheit and Celsius units (Temperature)
Unit of measure prefixes: nano, milli, micro, mega,
and kilo
Continuity test
Diode test
AC/DC True RMS Clamp Meter User Manual
4.Specifications
Function
Range & ResolutionlAccuracy (% of readina)
AC Current(50/60Hz) 600.0 AAC + (2.8 % + 8 digits)
1000 AAC + (3.0 % + 8 digits)
AC Current(400Hz) |600.0 AAC + (5.0 % + 10 diaits)
1000 AAC +(5.0 % + 10 digits)
DC Current 600.0 ADC +(2.8 % + 5 digits)
1000 ADC +(3.0 % + 5 digits)
600.0 mVDC +(0.8% + 2 digits)
DC Voltage 6.000 VDC
60.00 VDC +(1.5% + 2 digits)
600.0 VDC
AC Voltage 6.000 VAC
(50-400HZ) 60.00 VAC +(1.8% + 8 digits)
600.0 VAC
600.00 +(1.0% + 4 digits)
Resistance 6.000KQ
60.00KQ +(1.5% + 2 digits)
600.0KQ
6.000MQ +(2.5% + 3 digits)
60.00MQ +(3.5% + 5 digits)
40.00nF +(4.0% reading +20 digits)
400.0nF
4.000 u Е +(3% reading +5 digits)
Capacitance 40.00 u F
400.0 u Е +(4.0% reading +10 digits)
4000 u Е +(5.0% reading +10 digits)
Frequency 10-10kHz +(1.5% reading +2 digits)
Sensitivity:15Vrms
Temp -20.0 to 760.0°C _|+(3%rdg+5°C)
(type-K) -4.0 to 1400.0°F | +(3%rdg+9°F)
(probe accuracy not
included)
AC/DC True RMS Clamp Meter User Manual
Specifications Transmitter Unit Receiver Unit
Display _1U88 — LED
Controls Relative/USB Button a
Carrier Frequency |916.0MHz N/A
(ISM Band)
RF O/P Power 10dBm
Receive Sensitivity -109dBm
Communication >100m in an N/A
Distance unobstructed field | 1
Clamp size Opening 1.5" (40mm) approx
Diode Test Test current of 0.3MA typical;
Open circuit voltage 1.5V DC typical.
Continuity Check Threshold <40€; Test current <0.5mA
Low Battery Indication
Overrange Indication
Measurements Rate
Input Impedance
Display
AC Current
AC Voltage bandwidth
Operating Temperature
Storage Temperature
Operating Humidity
Storage Humidity
Operating Altitude
Over voltage
Battery
Auto OFF
Dimensions/Weight
Safety
" À" is displayed
"OL" is displayed
2 per second, nominal
10MQ (VDC and VAC)
6000 counts LCD
50-400Hz (AAC)
50-400Hz (VAC)
5 to 40°C(41 to 104°F)
-20 to 60°C(-4 to 140°F)
Max 80% up to 31°C(87°F) decreasing
linearly to 50% at 40°C(104°F)
<80% |
7000ft. (2000meters) maximum.
Category lll 600V
One 9V Battery
approx. 15 minutes
232x77x39mm/271g
For indoor use and in accordance with
Overvoltage Category Il, Pollution
Degree 2. Category Il includes local
level, appliance, portable equipment,
etc., with transient overvoltages less
than Nuarnnltana Cat Ill
AC/DC True RMS Clamp Meter User Manual
5.0peration
Notices: Read and understand all warning and precaution statements
listed in the safety section of this operation manual prior to using
this meter. Set the function select switch to the OFF position when
the meter is not in use.
AC/DC Current Measurements
Warning: Ensure that the test leads are disconnected from the meter
before making current clamp measurements.
*Set the Function switch to the 1000ADC, 600ADC, 1000AAC or
600AAC range.
e|f the range of the measured is not known, select the higher range
first then move to the lower range if necessary.
* Press the trigger to open jaw. Fully enclose one conductor to be
measured.
The clamp meter LCD will display the reading.
AC/DC True RMS Clamp Meter User Manual
DC/AC Voltage Measurements
* Insert the black test lead into the negative COM terminal and the
red test lead into the positive V terminal.
* Set the function switch to the V position.
* Select AC or DC with the MODE button.
*Connect the test leads in parallel to the circuit under test.
*Read the voltage measurement on the LCD display.
Resistance Measurements
* Insert the black test lead into the negative COM terminal and the
red test lead into the positive terminal.
*Set the function switch to the Q »+-) CAP position.
*Touch the test probe tips across the circuit or component under test.
It is best to disconnect one side of the device under test so the rest
of the circuit will not interfere with the resistance reading.
*For Resistance tests, read the resistance on the LCD display.
AC/DC True RMS Clamp Meter User Manual
Diode and Continuity Measurements
* Insert the black test lead banana plug into the negative COM jack
and the red test lead banana plug into the positive diode jack.
* Turn the rotary switch to the £ >) CAP position.
* Press the MODE button until "++" appears in the display.
*Touch the test probes to the diode under test. Forward voltage will
indicate 0.4V to 0.7V. Reverse voltage will indicate "OL". Shorted
devices will indicate near OmV and an open device will indicate "OL"
in both polarities.
Red Black Black Red
Probe Probe Probe Probe
Forwardtest Reverse test
For Continuity tests, if the resistance is <40Q, a tone will sound.
Capacitance Measurements
Warning: To avoid electric shock, disconnect power to the unit under
test and discharge all capacitors before taking any capacitance
measurements. Remove the batteries and unplug the line cords.
*Set the rotary function switch to the Q #9) CAP position.
*Insert the black test lead banana plug into the negative (COM) jack.
Insert the red test lead banana plug into the positive (V) jack.
* Touch the test leads to the capacitor to be tested.
*Read the capacitance value in the display.
Frequency/duty Cycle Measurements (electronic)
*Set the rotary function switch to "V" position.
*Select ACV with the MODE button
* Press the Hz/% button to indicate "Hz" in the display.
* Insert the black lead banana plug into the negative COM jack and
the red test lead banana plug into the positive Hz jack.
Touch the test probe tips to the circuit under test.
* Read the frequency on the display.
* Press the Hz/% button again to indicate "%" on the display.
Read the % of duty cycle on the display.
AC/DC True RMS Clamp Meter User Manual
Temperature Measurements
Warning: To avoid electric shock, disconnect both test probes from
any source of voltage before making a temperature measurement.
Set the function switch to TEMP.
* Insert the Temperature Probe into the negative (COM) and the V
jacks, making sure to observe the correct polarity.
Select °C or °F with the MODE button.
* Touch the Temperature Probe head to the part whose temperature
you wish to measure. Keep the probe touching the part under test
until the reading stabilizes (about 30 seconds).
*Read the temperature in the display. The digital reading will indicate
the proper decimal point and value.
Warning: To avoid electric shock, be sure the thermocouple has been
removed before changing to another measurement function.
Non-Contact AC Voltage Measurements
Warning: Risk of Electrocution. Before use, always test the Voltage
Detector on a known live circuit to verify proper operation.
*Touch the probe tip to the hot conductor or insert into the hot side
of the electrical outlet.
*|f AC voltage is present, the detector light will illuminate.
NOTE: The conductors in electrical cord sets are often twisted. For
best results, rub the probe tip along a length of the cord to assure
placing the tip in close proximity to the live conductor.
NOTE: The detector is designed with high sensitivity. Static electricity
or other sources of energy may randomly trip the sensor. This is
normal operation.
AC/DC True RMS Clamp Meter User Manual
6.Mode Button
To select DC/ACV,OHM/ Diode/Continuity/CAP, °C/°F.
MIN & MAX Recording Button
Press MIN/MAX to enter MIN, MAX Recording mode (manual range
only ). Select the proper range before selecting MIN MAX to ensure
that the MIN/MAX reading will not exceed the testing range. Press
once to select MIN. Press again to select MAX. and press again release
MIN/MAX recording function.
Rel Button
For DCA Zero & Offset adjustment.
Data Hold Button
To freeze the LCD meter reading, press the data hold button. The
data hold button is located on the left side of the meter (top button).
While data hold is active, the HOLD display icon appears on the LCD.
Press the data hold button again to return to normal operation.
Note: The HOLD feature will activate when the Backlight is turned
on. Press the HOLD key again to exit Hold.
Range Button
When the meter is first turned on, it automatically goes into
AutoRanging. This automatically selects the best range for the
measurements being made and is generally the best mode for most
measurements. For measurement situations requiring that a range
be manually selected, perform the following:
* Press the RANGE button. The “Auto Range” display indicator will
turn off, The “Manual Range” display indicator will turn on
* Press the RANGE button to step through the available ranges until
you select the range you want.
* Press and hold the RANGE button for 2 seconds to exit the Manual
Ranging mode and return to AutoRanging.
AC/DC True RMS Clamp Meter User Manual
Wireless USB
The Wireless USB for long-distance communications. Press and USB
the REL/USB button for 2 seconds to turn the Wireless USB on. The
USB icon appears on the LCD.
Press the REL/USB button again for 2 seconds to return to normal
operation.
Backlight Button
The backlight function illuminates the display and is used when the
ambient light to too low to permit viewing of the displayed readings.
Press the :%: button for two seconds to turn the backlight on and
press the button a second time to turn the backlight off.
Battery Replacement
* Remove the one rear Phillips head screw.
* Open the battery compartment.
* Replace the Requires One 9V battery.
* Re-assemble the meter.
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