CPS Products CPS Products AC750 Manual

Test Equipment Depot - 800.517.8431

-

99 Washington Street Melrose, MA 02176

TestEquipmentDepot.com

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OWNER'S MANUAL (En

glish}

CONTENTS

1. Safety Information

1.1 Preliminary

1.2 Usage

1.3 Symbols

1.4 General Use

2. Description

2.1 AC750 Layout ............................................................................5

2.2 Switch, Key and Input Jack Description

2.3 LCD Display ........................................................................... 7-8

3. Specifications

3.1 General .......................................................................................9

echnical Data .................................................................... 10-15

3.2 T

4. Operating Instructions

4.1 Reading Hold ...........................................................................16

4.2 Manual Measuring Range

4.3 Frequency Duty/Ratio Switch ...................................................16

4.4 Maximum / Minimum Measurement ........................................17

4.5 Function Key ............................................................................17

4.6 INRUSH Measurement .............................................................17

4.7 Back Light And Clamp Head Light ............................................18

4.8 Automatic Power-Off ................................................................18

4.9 Measurement Preparation ........................................................18

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.........................................................................................2

.....................................................................................3

................................................................................4

.....................................6

........................................................16

2

CONTENTS

4.10 Current Measurement ............................................................19

4.11 Voltage Measurement

4.12 Frequency and Duty Ratio Measurement

4.13 Resistance Measurement .......................................................21

4.14 Diode Test ..............................................................................21

cuit Continuity Test

4.15 Cir

4.16 Capacitance Measurement

4.17 Surge Current Measurement

4.18 Non-Contact Voltage Detection

5. Maintenance

5.1 Calibration

5.2 Battery Replacement ................................................................24

5.3 Probe Replacement ..................................................................24

6. Accessories ...........................................................28

7. Warranty ..............................................................29

................................................................................24

............................................................20

...............................20

............................................................22

.....................................................22

..................................................22

..............................................23

3

1. SAFETY INFORMATION

1.2 USAGE

1.2.1 DO NOT measure voltage greater than 750 V AC, 1000 V DC.

1.2.2 DO NOT measure resistor, capacitor, diode and circuit while

connected to power.

1.2.3 DO NOT measure capacitance before capacitor is discharged

completely.

1.2.4 DO NOT use meter in explosive gas, vapor or dusty environments.

1.2.5

DO NOT store or use meter in direct sunlight, high ambient

temperature or high humidity.

1.2.6 During test of currents, resistors, capacitors, diodes and circuit

connections, DO NOT connect meter to a voltage source.

1.2.7 DO NOT use unless meter bottom case and battery cover are

completely fastened .

1.2.8 During use, select the right function and measuring range.

During measurement, DO NOT

1.2.9
each range.

When measuring a circuit with the meter connected,

1.2.10
contact with probe tip (metal part).

During measurement, if voltage to be measured is more than

1.2.11
60 V DC or 30 V AC (RMS),

protection device

1.2.12 In the manual measuring range mode, when measuring an
unknown value, select the highest measuring range first.

1.2.13 Before rotating Selector Switch to change measuring function,
remove probe from circuit to be measured.

1.2.14 If you find any abnormal phenomena or failure of meter, stop
using immediately.

exceed the indicated value for

DO NOT

always keep fingers behind finger

5

1. SAFETY INFORMATION

1.4 GENERAL USE

1.4.1 Do not open case to adjust or repair (only for technicians who fully

understand this meter and electrical shock hazard).

1.4.2 Before opening case or battery cover, remove probe from circuit to be

measured.

1.4.3 To avoid wrong readings causing electric shock, when “ “ appears on

meter display, replace battery immediately.

1.4.4 Clean meter with damp cloth and mild detergent. Do not use abrasives

or solvents.

1.4.5 Set Selector Switch to OFF position when meter not in use.

1.4.6 If meter is not used for an extended time, remove battery.

2. DESCRIPTION

2. DESCRIPTION

• This meter is a portable, professional multifunction measuring

instrument with LCD display and back light. Selector Switch is
operated with one hand for easy operation.

• This meter is for measuring AC current, DC current, AC voltage,

DC voltage, frequency, duty ratio, resistance, capacitance
measurement, circuit connection, diode test and non-contact
voltage detection.

Other features include:

•

Automatic measuring range and manual measuring range

• Overload protection

• Reading hold function

• Max and Min measuring function

• Clamp head frequency measurement function

• Auto power-off function

• Relative measuring function

• Low battery indicator

7

2. DESCRIPTION

2.2 SWITCH, KEY AND INPUT JACK DESCRIPTION

BL/HOLD Back light or reading hold key

FUNC Function key (use with Selector Switch)

RANGE For switching manual measuring range state

REL For entering relative measurement state

Hz/% For frequency and duty ratio measurement function switch

MAX/MIN For maximum/minimum measurement function switch

OFF For turning power OFF

INPUT Jack

COM Jack

Selector
Switch

99 Washington Street Melrose, MA 02176

-

Voltage, resistance, frequency, duty ratio, capacitance, diode,
circuit connection input wire connecting terminal

Voltage, resistance, frequency, duty ratio, capacitance, diode,
circuit connection common wire connecting terminal

For selecting function and measuring range

Test Equipment Depot - 800.517.8431

TestEquipmentD

epot.com

9

3. SPECIFICATIONS

3.1 GENERAL

Maximum Input Current 1000A AC; 1000A DC
Maximum Input Voltage 750V AC (RMS); 1000V DC

AC Volts

DC Volts

AC Amps 60/600/1000 (+/- 2% reading)
DC Amps 60/600/1000 (+/- 2% reading)

OHMs

Frequency

(Through Jaw Clamp)

Frequency

(Through Mode V)

Frequency

(Through Mode HZ/DUTY)

Measuring Range Overload Protection Yes (Full Range)
Sampling Rate Approx. 3 times/sec.
LCD Display Auto-Off After 15 minutes (if no operation)
Test Leads (Red, Black) 39" (1 m), Included
Battery Undervoltage Indication
Polarity Indication Automatic ("-" = negative polarity)
Display Indication

(Exceeds Max Range)

Temperature Coefficient <0.1 X accuracy/°C
Clamp, Max Opening 1.6" (42 mm)
Full measuring range overload

protection
Battery One 9V DC (Included)
Operation Temperature 32°F~122°F (0°C ~ 50°C)
Storage Temperature -14°F~122°F (-10°C ~ 50°C)
Size (H x W x D) 9.4˝ x 1.9˝ x 3.6˝ (238 x 50 x 92 mm)
Weight (Including Battery) 0.92 lb (420 g)

6mV/600mV/6V/60V/600V/750V (+/-

0.6% reading); 750V (+/-0.8% reading)
6mV/600mV/6V/60V/600V/1000V (+/-

0.5% reading); 1000V (+/-0.8% reading)

600/6K/60K/600K/6M/60M (+/- 2%
reading)

99.99 Hz to 999.9 Hz

99.99 Hz to 9.999kHz

9.999 Hz to 9.999 MHz

Display shows

"OL" or "-OL"

Yes

11

3. SPECIFICATIONS

3.2.1 TRUE RMS ZERO INPUT CHARACTERISTIC

3.2.1.1 For measuring non-sinusoidal wave signals, use true RMS
measuring method, which has less error than traditional
average response measuring method.

This true RMS meter can accurately measure non-sinusoi-

3.2.1.2
dal wave signals, but in AC function mode, when there is
no signal to be measured (input terminal short circuit in AC
voltage mode), clamp meter may show a reading from 1 to

50. These deviating readings are normal. In the designated
measurement range, they will not affect the accuracy for
multimeter measuring AC.

3.2.1.3 True RMS can be measured only when input signal reaches
a certain level. Therefore, the measuring range of AC
voltage and current should be specified at 2% ~100% of
full range.

3.2.2 AC CURRENT

Measuring range Resolution Accuracy

60A 0.01A

1000A 1A

Maximum input current: 1000A AC

•

• Maximum input current: 0~600A: 40~400Hz;
600A~1000A: 40~60Hz

±(2.5% reading + 8 digits)600A 0.1A

12

3. SPECIFICATIONS

3.2.3 DC CURRENT

Measuring range Resolution Accuracy

60A 0.01A

1000A 1A

•

Maximum input current: 1000A DC

3.2.4 SURGE CURRENT

Measuring range Resolution Accuracy

60A 0.01A < 60A for reference only

600A 0.1A ±(5% reading + 60 digits)

1000A 1A

Time of integration:
Measurement range: 20-1000A
Frequency range: 40-400Hz

3.2.5 DC VOLTAGE

Measuring range Resolution Accuracy

600mV 0.1mV

6V 0.001V

60V 0.01V

600V 0.1V

1000V 1V ±(0.8% reading + 4 digits)

• Input impedance: 10M

• Maximum input voltage: 750V AC (RMS) or 1000V DC

Note: In the small voltage measuring range, the probe is not
connected with the circuit to be tested, and the meter may have
fluctuating readings, which is normal and caused by the meter’s
high sensitivity. This does not affect actual measurement results.

100ms;

±(2.0% reading + 8 digits)600A 0.1A

±(0.5% reading + 5 digits)

13

3. SPECIFICATIONS

3.2.6 AC VOLTAGE

Measuring range Resolution Accuracy

600mV 0.1mV

6V 0.001V

60V 0.01V

600V 0.1V
750V 1V ±(0.8% reading + 4 digits)

•

Input impedance: 10M

• Maximum input voltage: 750V AC (RMS) or 1000V DC

• Frequency range: 40 - 400Hz

Note: In the small voltage measuring range,the probe is not connected with the circuit to
be tested, and the meter may have fluctuating readings, which is normal and caused by
the meter’s high sensitivity. This does not affect actual measurement results.

3.2.7 FREQUENCY

3.2.7.1 Clamp head measuring frequency (through range A):

Measuring range Resolution Accuracy

99.99Hz 0.01Hz

999.9Hz 0.1Hz

• Measuring scope: 10Hz-1kHz

• Input signal range: 20A AC (RMS) (input current will increase

when the frequency to be measured increases)

• Maximum input current: 1000A (RMS)

3.2.7.2 Through mode V:

Measuring range Resolution Accuracy

99.99Hz 0.01Hz

9.999Hz 0.001kH

• Measuring scope: 10Hz - 10kHz

• Input signal range: 20A AC (RMS) (input current will increase when

the frequency to be measured increases)

• Input impedance: 10M

14

• Maximum input voltage :750V AC (RMS)

±(0.8% reading + 5 digits)

±(1.5% reading + 5 digits)

±(1.5% reading + 5 digits)999.9Hz 0.1Hz

3. SPECIFICATIONS

3.2.7.3 Through mode HZ/DUTY:

Measuring range Resolution Accuracy

9.999Hz 0.01Hz

99.99Hz 0.1Hz

999.9Hz 0.001kHz

9.999kHz 0.01kHz

99.99kHz 0.1kHz

999.9kHz 0.001MHz

9.999MHz 0.001kH

• Overload protection: 250V DC or AC (RMS)

• Input voltage range: 2V (input voltage will increase when the
frequency to be measured increases)

3.2.8 Duty Ratio

Measuring range Resolution Accuracy

0.1-99.9% 0.1% ±3.0%

3.2.8.1 Through mode A (from clamp head):

• Frequency response:10-1kHz

• Input current range: ≥ 20A AC (RMS)

• Maximum input current: AC 1000A

3.2.8.2 Through mode V:

• Frequency response: 10-10kHz

• Input voltage range: ≥ 60mV AC

• Input impedance: 10M

• Maximum input voltage: 750V AC (RMS)

3.2.8.2 Through mode HZ/DUTY:

• Frequency response: 10 - 10MHz

• Input voltage range: ≥ 2V AC (RMS) (input voltage will increase
when the frequency to be measured increases)

• Maximum input voltage: 250V AC (RMS)

±(0.3% reading + 5 digits)

15

3. SPECIFICATIONS

3.2.9 RESISTANCE
Measuring range Resolution Accuracy

600Ω 0.1Ω

6kΩ 0.001kΩ

60kΩ 0.01kΩ

600kΩ 0.1kΩ

6MΩ 0.001MΩ

60MΩ 0.1MΩ

• Open circuit voltage: about 0.4 V

• Overload protection: 250 V DC or AC (RMS)

3.2.10 CIRCUIT CONTINUITY TEST
Measuring range Resolution Function

0.1Ω

• Overload protection: 250 V DC or AC (RMS)

3.2.11 CAPACITANCE

Measuring range Resolution Accuracy

9.999nF 0.001nF

99.99nF 0.01nF

999.9nF 0.1nF

9.999μF 0.001μF

99.99μF 0.01μF

999.9μF 0.1μF

9.999mF 0.001mF

99.99mF 0.01mF

• Overload protection: 250 V DC or AC (RMS)

±(0.8% reading + 3 digits)

±(2.0% reading + 5 digits)

If the resistance of circuit to
be measured is less than 50Ω,
the meter’s built-in buzzer may
sound.

±(3.0% reading + 5 digits)

16

3. SPECIFICATIONS

3.2.12 DIODE TEST

Measuring

range

• Forward DC current is about 1mA

• Backward DC voltage is about 3.3V

• Overload protection: 250V DC or AC (RMS)

4.1 READING HOLD

1. During measurement, if reading hold is required, press “HOLD/BL”
key and the value on the display will be locked. Press “HOLD/BL”
key again to cancel reading hold state.

4.2 MANUAL MEASURING RANGE

1. RANGE key is automatic/manual measuring range key to trigger
mode. The preset range is automatic measuring range. Press to
switch to manual measuring range. In manual measuring range
mode, click once to change to upper range. Continue to the top
range, then continue to press this key to change to the bottom
range, followed by recycling. If this key is pressed more than 2
seconds, it will switch back to automatic measuring range state.

Note: In capacitance and frequency measurement state, rhw manual
measuring range key is invalid.

4.3 FREQUENCY/DUTY RATIO SWITCH

1. When meter is in AC voltage mode, if “Hz/%” key is pressed,

the meter will measure Hz, and measure AC voltage, AC current
signal frequency. Click “Hz/%” key again and meter will measure
DUTY cycle, voltage and current signal duty ratio. If in HZ/DUTY
position, pressing HZ % key will switch between HZ and DUTY
by recycling.

2. If “Hz/%” key is pressed again, meter will revert to voltage,

current measurement state.

Resolution Function

0.001V

Display approximate diode

forward voltage value

17

4. OPERATING GUIDANCE

Note: If meter is in maximum/minimum value measurement state,
it can not switch to frequency, duty ratio measurement mode.

4.4 MAX/MIN MEASUREMENT CHOICE

1. Press “MAX/MIN” key to enter MAX mode, and always keep
measurement maximum value; press “MAX/MIN” key again, to
enter minimum value measurement state; press “MAX/MIN”
key for the third time and the meter will display the difference of
maximum and minimum value; press “MAX/MIN” key to repeat
the above operations by recycling.

2. After entering MAX or MIN mode, meter will automatically save
the measured maximum or minimum value.

3.

If the user presses “MAX/MIN” key more than 2 sec, meter will

restore normal measuring range.

Note:
a) When meter is in maximum/minimum value measurement
state, it is in manual measuring range mode.
b) When meter is in frequency
can not switch to maximum/ minimum value measurement mode.

4.5 FUNCTION SWITCH

1.

In resistance mode, press

among resistance, diode and continuity detection by recycling.

2.

In voltage and current mode, press

between AC and DC.

4.6 REL/INRUSH MEASUREMENT

1.

REL/INRUSH key is relative value measurement key

this key will enter relative value measurement mode. The
current display value can be stored in the memory as reference
value. When the user measures later, the display value is
the difference for input value minus reference value. ie.
REL (current reading)= Input value - Reference value.

2.

The relative value measurement can only be performed in

manual mode.

18

, duty ratio measurement state, it

FUNC key and meter will switch

FUNC key to switch

. Pressing

4. OPERATING GUIDANCE

3. In AC current measurement state, press REL/INRUSH more than

2 seconds to enter surge measuring state.

4.7 BACKLIGHT AND CLAMP HEAD LIGHT

1. During measurement, if ambient light is too dark to read the
display, press and hold “BL/HOLD” key to activate backlight.
Backlight will automatically turn off after 30 seconds.

2. During this period, pressing “BL/ HOLD” key more than two
seconds will turn OFF backlight.

3. In the current mode, meter will turn backlight and clamp head
light on. Backlight uses an LED with high current draw. Backlight
will turn off after 30 seconds. Using backlight often will shorten
battery life.

Note: When battery voltage ≤ 7.2 V, the LCD displays “ ” under­voltage symbol. If using backlight and battery voltage drops below

7.2 V due to high working current, the symbol may appear and

measurement accuracy is not guaranteed. Continue to use meter
normally without using the backlight. Do not replace battery until

symbol shows under normal conditions.

4.8 AUTOMATIC POWER-OFF

1. After powering on, and if meter isn’t used for 15 minutes, meter
will enter suspended state, automatically powering off to save the
battery. Within 1 minute before shutdown, buzzer will sound five
times. Meter will then enter a dormant state.

2. After automatic power-off, press FUNC key, to turn meter on
again.

3. Holding FUNC key when powering on cancels automatic power­off function.

19

4. OPERATING GUIDANCE

4.9 MEASUREMENT PREPARATION

1. Rotate the Selector Switch to turn on power. When battery voltage
is low (about ≤ 7.2 V), LCD displays symbol. Replace
battery.

2. means that voltage or current should not be more than the
specified value to protect internal line from damage.

3. Set Selector Switch to required measuring function and range.

4. When connecting line, first connect common test line, then
charged test line. When removing the line, remove charged test
line first.

4.10 CURRENT MEASUREMENT

WARNING

ELECTRIC SHOCK HAZARD. REMOVE PROBE FROM METER BEFORE
MEASURING WITH CURRENT CLAMP.

1. Set Selector Switch to position A. At this time, meter is in AC current
measurement state. Choose appropriate measuring range.

2. If you want to measure DC current, press FUNC key to enter direct
current measurement state.

3. Hold trigger, open clamp head, clip one lead of measurement circuit to
be tested in the clamp.

4. Read current value on LCD display.

Note:

1. Clamping two or more leads of circuit to be tested simultaneously will
not give correct measuring results.

2. To get accurate readings, connect lead to be tested at center of current
clamp.

3. indicates that maximum input AC current is 1000 A

4. To improve measurement precision, in DC current measurement state,
if LCD display is not zero, press REL to return to zero, then measure.

20

4. OPERATING GUIDANCE

4.11 VOLTAGE MEASUREMENT

WARNING

ELECTRIC SHOCK HAZARD. PAY SPECIAL ATTENTION TO AVOID
SHOCK WHEN MEASURING HIGH VOLTAGE. DO NOT INPUT
VOLTAGE MORE THAN AC750 RMS.

1. Insert black probe to COM jack, insert red probe to INPUT jack,

choose appropriate measuring range.

2. Place Selector Switch to AC voltage V or mV position. At this

time, meter is in the DC voltage measurement state. To measure
AC voltage, press FUNC key to enter AC voltage measurement
state.
Connect probe with voltage source or both ends of load in

3.
parallel for measurement.

4. Read the voltage on the LCD.

Note:

1. In small voltage measuring range, probe is not connected with

circuit to be tested and meter may have fluctuating readings,
which is normal and caused by the meter’s high sensitivity
When meter is connected with circuit to be tested, you will get
actual measured value.
In relative measurement mode, automatic measuring range is

2.

invalid.

3. Indicates maximum input AC current is 750V AC or 1000V

DC Maximum input voltage is mode mV is 600 mV DC or AC.

4. If readings measured by meter are more than 750C RMS AC, a

“beep” alarm will sound.

.

21

4. OPERATING GUIDANCE

4.12 FREQUENCY AND DUTY RATIO MEASUREMENT

A) Clamp head measuring frequency (through AC current):

WARNING

ELECTRIC SHOCK HAZARD. REMOVE PROBE FROM METER
BEFORE MEASURING WITH CURRENT CLAMP.

1. Set Selector Switch to position A .

2. Hold trigger, open clamp head, clip one lead of measurement
circuit to be tested in the clamp.

3. Press Hz/% key to switch to frequency measuring state.

4.

Read current value on the LCD display.

5. Pressing Hz/% again enters duty ratio measuring state.

Note:

1. Clamping two or more leads of circuit to be tested simultaneously
will not get correct measuring results.

2. Frequency measurement range is 10Hz~1kHz the frequency to
be tested is less than 10Hz, or if frequency is higher than 10 kHz,
accuracy is not guarantee

3. Duty ratio measuring range is 10 ~ 95%.

4. “ ”means that maximum input current is 1000A AC (RMS).

B) In Voltage Measurement Mode:

WARNING

ELECTRIC SHOCK HAZARD. PAY SPECIAL ATTENTION TO AVOID
SHOCK WHEN MEASURING HIGH VOLTAGE. DO NOT INPUT
VOLTAGE MORE THAN AC 750 RMS.

1. Insert black probe to COM jack, insert red probe to INPUT jack.

2. Place Selector Switch to V or mV position, press FUNC to enter

AC voltage measurement state.

3. Press Hz/% key to switch to frequency measuring state.

22

4. OPERATING GUIDANCE

4. Connect probe with signal or both ends of load in parallel for
measurement.

5. VRead on LCD.

6. Pressing Hz/% again enters duty ratio measuring state.

Note:

1. Frequency measurement range is 10Hz~1kHz When the frequency
to be tested is less than 10Hz,the LCD will show 00.0 Measuring
frequency higher than 10kHz is possible, but accuracy is not
guaranteed.

2. Duty ratio measuring range is 10 ~ 95%.

3.

means maximum input voltage is 750V AC (RMS).

C) In HZ/DUTY Measurement Mode:

WARNING

PAY SPECIAL ATTENTION TO AVOID SHOCK WHEN MEASURING
HIGH VOLTAGE. DO NOT INPUT VOLTAGE MORE THAN AC 250V

RMS.

1. Insert black probe to COM jack, insert red probe to INPUT jack.

2. Set Selector Switch to position HZ.

3. Connect probe with signal or both ends of load in parallel for
measurement.

4. Read LCD.

5. Press Hz/% again to enter duty ratio measuring state.

Note:

1. Frequency measurement range is 10Hz~1kHz When frequency
to be tested is more than 10Hz, LCD will show 00.0. Measuring
frequency higher than 10 kHz is possible, but accuracy is not
guaranteed.

23

4. OPERATING GUIDANCE

4.13 RESISTANCE TEST

WARNING

ELECTRIC SHOCK HAZARD. WHEN MEASURING CIRCUIT
IMPEDANCE, DETERMINE THAT THE POWER SUPPLY IS
DISCONNECTED AND THE CAPACITOR IN THE CIRCUIT IS
COMPLETELY DISCHARGED.

1. Insert black probe to COM jack, insert red probe to INPUT

jack.

2. Place Selector Switch to Ω position. At this time, meter

is in the measurement state.
Connect probe to the both ends of resistor or circuit to be

3.
tested for measurement.

4. LCD will show readings.

Note:

1. When input end is open, LCD shows “0L” out-of-range state.

2. When resistance to be tested > 1MΩ, the meter reading
will be stable after a few seconds, which is normal for high
resistance readings.

4.14 DIODE TEST

1. Insert black probe to COM jack, insert red probe to

jack.

Set Selector Switch to

2.

3. Press FUNC key to switch to measuring state.

4. Connect red probe to diode anode and connect black probe

to diode cathode.

5. Read the LCD.

Note:

1. Meter will show approximation of diode forward voltage

drop.

2. If probe has reverse connection or probe is open, LCD will

show “0L”.

24

Ω

INPUT

4. OPERATING GUIDANCE

4.15 CIRCUIT CONTINUITY TEST

WARNING

ELECTRIC SHOCK HAZARD. WHEN MEASURING CIRCUIT
CONTINUITY, DETERMINE THAT THE POWER SUPPLY IS
DISCONNECTED AND THE CAPACITOR IN THE CIRCUIT IS
COMPLETELY DISCHARGED.

1. Insert black probe to COM jack, insert red probe to INPUT jack.

2. Set Selector Switch to Ω

3. Press FUNC key to switch to circuit continuity measuring state.

4. Connect probe to both ends of circuit to be tested.
If resistance of circuit to be measured is less than 30Ω

5.
may sound.
Read circuit resistance value on the LCD.

6.

Note: If probe is open or circuits resistance to be tested is more than
600

Ω, display will show “0L”.

4.16 CAPACITANCE MEASUREMENT

, a buzzer

WARNING

ELECTRIC SHOCK HAZARD. TO AVOID ELECTRIC SHOCK,
BEFORE MEASURING CAPACITANCE, DISCHARGE CAPACITANCE
COMPLETELY.

1. Insert black probe to COM jack, insert red probe to INPUT jack.

2. Set Selector Switch to .

3. After discharging capacitance completely, connect probe to both

ends of capacitor to be tested.

4. Read capacitance on the LCD.

Note: To improve accuracy below 10nF measuring value, subtract the
distributed capacitance of meter and cable.

25

4. OPERATING GUIDANCE

4.17 SURGE CURRENT MEASUREMENT

WARNING

ELECTRIC SHOCK HAZARD. REMOVE THE PROBE FROM THE
METER BEFORE MEASURING WITH CURRENT CLAMP.

4.10.1 Set Selector Switch to position A.

4.10.2 Hold trigger, open clamp head, clip one lead of

measurement circuit to be tested in the clamp.

4.10.3 Press REL/INRUSH key more than 2 sec. to enter surge

current measurement mode. LCD will show “- - - -”, until
motor start is detected. Meter shows and keeps surge
current value.

Read current surge value on LCD display.

4.10.4

Note:

1. Clamping two or more leads of circuit to be tested
simultaneously will not get correct measuring results.

2. To get accurate reading, connect lead to be tested at center of
current clamp.

3. In manual measuring range mode, if LCD shows “OL”, which
indicates over-range, choose a higher measuring range.

4. In manual measuring range mode, if you do not know value to
be measured in advance, choose highest measuring range.

5. “ ”means maximum input current is 1000A AC (RMS).

4.18 NCV MEASUREMENT

1. Turn Selector Switch to NCV.

2. Place meter top close to the conductor. When test voltage is
greater than 110 VAC (RMS) when meter is close to conductor,
meter induction voltage indicator will turn on and buzzer will
sound.

26

5. MAINTENANCE

Note:

1. Even if no indication, voltage may exist still. Do not use non-contact voltage
detector to judge whether there is voltage in the wire. Detection operation could
be affected by socket design, insulation thickness, type and other factors.

2. When inputting voltage on meter input terminal, due to existence of induced
voltage, voltage induction indicator also may light.

3. External sources of interference (such as flashlight, motor, etc.) may incorrectly
trigger non-contact voltage detection.

5.1 CALIBRATION

This meter should be recalibrated annually( within a temperature range
of 65°F to 83°F (18°C to 28°C) and relative humidity less than 75%) .

5.2 BATTERY REPLACEMENT

WARNING

TO AVOID ELECTRIC SHOCK, MAKE SURE THAT THE TEST LEADS
HAVE BEEN CLEARLY MOVE AWAY FROM THE CIRCUIT UNDER
MEASUREMENT BEFORE OPENING THE BATTERY COVER.

1. When appears, battery should be replaced immediately.

2. Remove screw from battery cover.

3. Replace battery.

4. Replace battery cover and screw.

Note: Do not reverse battery polarity.

5.3 PROBE REPLACEMENT

Replace test leads if damaged or worn.

WARNING

USE MEETS EN 61010-031 STANDARD, RATED CAT III 1000V, OR
BETTER TEST LEADS.

WARNING

TO AVOID ELECTRIC SHOCK, MAKE SURE THE PROBES ARE DIS­CONNECTED FROM THE MEASURED CIRCUIT BEFORE REMOVING
THE REAR COVER. MAKE SURE THE REAR COVER IS TIGHTLY
SCREWED BEFORE USING THE INSTRUMENT.

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6. ACCESSORIES

6. ACCESSORIES

Description Part # Qty

Test Probe Set DMXTL 1 pair

WARRANTY

CPS Products, Inc. guarantees that all products are free of manufacturing
and material defects to the original owner for one year from the date
of purchase. If the equipment should fail during the guarantee period it
will be repaired or replaced (at our option) at no charge. This guarantee
does not apply to equipment that has been altered, misused or solely
in need of field service maintenance. All repaired equipment will carry
an independent 90-day warranty. This repair policy does not include
equipment that is determined to be beyond economical repair.

Test Equipment Depot - 800.517.8431

- 99 Washington Street Melrose, MA 02176

TestEquipmentDepot.com

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AC750_OM111816