protech QM1634 AC and DC Clampmeter User Manual

: August 5, 2024
: protech

SPECIALIST

1000 Amp

AC/DC Clampmeter

User Manual

QM1634

Thank you for purchasing this 1000 Amp AC/DC Clampmeter. The reading range of up to 1000A makes this clampmeter ideal for electrical fitters and contractors working with high currents. Autoranging by default, the clampmeter also features true RMS for accurate readings. Utilise the data hold and relative measurement modes to log and compare data. The backlight will assist you to view various readings in low light conditions.

Please familiarise yourself with the functions of the clampmeter before use.
We recommend retaining this manual for ease of reference.

Improper use of this meter can cause damage, shock, injury or death.
Before using the meter, please inspect the condition of the test leads and the meter itself for any damage. If damage is present, please discontinue use.
Do not measure voltage if the voltage on the terminals exceeds 1000V above earth ground.
Use great care if voltages are greater than 30VAC RMS. Anything above this is considered a shock hazard.
Do not apply voltage to the meter when the resistance is selected.
Do not exceed the maximum limits of the input values shown in the specification tables on pages 10-12 of this manual.
Remove the batteries from the meter if it will be unused for an extended period of time.

FUNCTIONS

NCV Sensor
Current Clamp
LED Indicator Data Hold
Function Switch
LCD Screen
Hz% Button
Relative Button
V/TEMP Input Jack
Auto/Manual
Ranging Button
Function Button
COM Input Jack
Backlight Button
Clamp Trigger
Flash Light

The battery compartment is at the rear of the multimeter.

FUNCTIONS

NCV Detection| Move the rotary switch to NCV position, hold the meter once detect the voltage, meter will be alarmed and LED flash
Current Clamp| Clamp the cable once measuring the current, the current reading will be displayed in LCD
Flash Light| Turn on the flash light and the light bulb will be lighted
NCV Indicator| Once NCV function detect the voltage, the LED indicator will be twinkled
Data Hold| Push this button to hold the readings in LCD, push one more time to exit the data hold function
Clamp Opening Trigger| The max. jaw opening size is 23mm
Rotary Switch| Move the rotary switch for selecting proper range and function
Backlight Button| Push the button to activate the LCD backlight, push one more time to exit. Once rotary switch move to current measurement range, push this button can also turn on the flash light
LCD Display| Readings and measurements taken by the clampmeter appear in this area.
Input Jacks|

V/TEMP: Positive input jack
COM: Negative input jack

FUNCTION BUTTONS

SEL| Push SEL to shift AC/DC, °C / °F, resistance, diode & continuity test
RAN| Push this button to switch proper range under voltage and resistance measurement mode
HOLD| Push this button to hold the readings in LCD, press again to exit the data hold function
Hz/%| Under AC voltage measurement, press Hz/% to selection function from voltage frequency to duty cycle
REL| Under DC current measurement, press to measure relative current. Under AC current measurement hold the button down to activate inrush/surge current measurement. Hold button down again to exit the function.

SYMBOL

| DESCRIPTION| SYMBOL| DESCRIPTION
---|---|---|---
| Data Hold| |

Low Voltage Indication

Inrush Current

mV
V

Unit of Capacitance

DC

Centigrade Temperature

%

| Duty Cycle Measurement| REL| Relative Value Measurement
TRMS|

True RMS Measurement

| |

OPERATING INSTRUCTIONS

NOTE: Read and understand all Warning and Caution statements in this operation manual prior to using this meter. Set the rotary switch to the OFF position when the meter is not in use.

CURRENT MEASUREMENTS

WARNING:

Disconnect the test leads before making clamp measurements
To avoid electrical shock and/or damage to the meter, do not attempt to take any voltage measurement that might exceed 600V

Set the rotary switch to proper current range, select the correct range based on measurement
Press the clamp opening trigger to open the jaws and fully enclose one conducting wire
Read the measured current value in the LCD display
If display shows “ OL “, means overload, should select the higher range of measurements
To shift the AC or DC current by pressing SEL button

DC VOLTAGE MEASUREMENTS

WARNING:

The max. input DC voltage is 600V DC, to avoid electrical shock and/or damage the meter, do not attempt to take any voltage measurement that might exceed 600V DC

Set the rotary switch to the V position.
Insert the black test lead banana plug into COM jack, insert the red test lead banana plug into INPUT jack.
Touch the black test probe tip to the negative side of the circuit; touch the red test lead probe tip to the positive side of circuit.
Read the voltage value in the display.

NOTE: Unstable display may occur, especially at the low voltage range measurement (like 200mV range), even no test leads insert at input terminals, and it is the normal situation and not influences the accuracy.

AC VOLTAGE MEASUREMENTS

WARNING:

The max. input DC voltage is 600V DC, to avoid electrical shock and/or damage the meter, do not attempt to take any voltage measurement that might exceed 600V DC

Set the function switch to the V position.
Insert the black test lead banana plug into COM jack, insert the red test lead banana plug into INPUT jack.
Touch the black test probe tip to the negative side of the circuit; touch the red test lead probe tip to the positive side of circuit.
Read the voltage value in the display.

NOTE: Unstable display may occur, especially at the low voltage range measurement (like 2V range), even no test leads insert at input terminals, and it is the normal situation and not influences the accuracy.

RESISTANCE MEASUREMENT

WARNING:

To avoid electric shock, disconnect power to the unit under test and discharge all capacitors before taking any resistance measurements

Set the function switch to position and press the SEL button to select the Ω range
Insert the black test lead banana plug into COM jack, insert the red test lead banana plug into INPUT jack.
Touch the black test probe tip to one side of the resistance of under test; touch the red test probe tip to the other side.
Read the resistance value in the display.

DIODE TEST

WARNING:

To avoid electric shock, disconnect power to the unit under test and discharge all capacitors before taking diode test

Set the function switch to position and press the SEL button to choose diode test mode
Insert the black test lead banana plug into COM jack, insert the red test lead banana plug into INPUT jack.
Place the red test lead on the anode of diode and black test lead on the cathode of diode.
The meter will show the approx. forward voltage of diode. Reverse voltage will indicate OL.

CONTINUITY CHECK

WARNING:

To avoid electric shock, disconnect power to the unit under test and discharge all capacitors before taking continuity check

Set the function switch to position and press the SEL button to choose continuity check mode
Insert the black test lead banana plug into COM jack, insert the red test lead banana plug into INPUT jack.
Touch the test probe tips across the circuit or component under test.
If the resistance is <30Ω, the audible signal will be sounded.

TEMPERATURE MEASUREMENT

Set the function switch to °C °F position, the value of environmental temperature shows in display. Press SEL button to shift °C mode or °F mode.
Insert the red terminal of temperature probe into the INPUT jack, black terminal into COM jack, place the temperature probe tip where needed to measure.
Read the temperature on the display

RESISTANCE MEASUREMENT

WARNING:

Due to external interference source, this function may cause wrong voltage detection, the detection result is for reference only.
Set the function switch to NCV position, contact the top part of meter with the circuit under test, the indicating LED will be flashed and audible signal will be sounded once detecting the voltage, the signal strength showed in LCD display.

NOTE:

The detection result is for reference, do not determine the voltage by NCV detection ONLY
Detection may interfere by socket design, insulation thickness and other variable conditions
The external interference sources, such as flashlight, motor, etc, may cause the wrong detection

LINE (LIVE WIRE RECOGNITION) TEST

Set the rotary switch to LINE position, connect the black test lead to COM jack and red test lead to V jack, hold the insulation part of black test lead and not put into circuit under measurement; contact the red test lead to live wire, the buzzer of meter will be activated and red LED will be flickered, when the red test lead connect the earth line, the buzzer does not sound and LED will not flicker.

NOTE: When the circuit is in serious leakage (approx. over 15V), the red test lead even contact earth line, the buzzer of meter will be sounded and LED will be flickered.

CAPACITANCE MEASUREMENT

WARNING:

To avoid electric shock, disconnect power to the unit under test and discharge all capacitors before taking capacitance measurement.

Set the rotary switch to position and press the SEL button to choose mode.
Insert the black test lead banana plug into COM jack, insert the red test lead banana plug into INPUT jack.
Touch the test probe tips across the capacitance under test.
Read the capacitance value in the display

MEASUREMENT SPECIFICATIONS

Accuracy: ±(%readings + digit), warranty period: 12 months)
The following guide is based on an environmental temperature of 18-28°C and humidity <80%.

DC VOLTAGE

RANGE

| RESOLUTION| ACCURACY
---|---|---
600mV| 0.1mV|

±(0.5% reading + 3 digits)

6V

| 0.001V| ±(0.8% reading + 5 digits)
60V|

0.01V

600V

| 0.1V
1000V| 1V|

±(1.0% reading + 5 digits)

Input impedance: 10MΩ; Max. input voltage: 1000V DC / 750V AC RMS

AC VOLTAGE

RANGE

| RESOLUTION| ACCURACY
---|---|---
600mV| 0.1mV|

±(1.0% reading + 10 digits)

6V

| 0.001V| ±(1.0% reading + 5 digits)
60V|

0.01V

600V

| 0.1V
750V| 1V|

±(1.2% reading + 5 digits)

Input impedance: 10MΩ; Max. input voltage: 1000V DC / 750V AC RMS
Frequency response: TRMS40Hz-1kHz

DC CURRENT

RANGE

| RESOLUTION| ACCURACY
---|---|---
60A| 0.01A|

±(2.5% readings + 10 digits)

600A

| 0.1A
1000A|

1A

AC CURRENT

RANGE

| RESOLUTION| ACCURACY
---|---|---
60A| 0.01A|

±(2.5% readings + 10 digits)

600A

| 0.1A
1000A|

1A

Frequency response: TRMS 40Hz-1kHz

RESISTANCE

RANGE

| RESOLUTION| ACCURACY
---|---|---
600Ω| 0.1Ω|

±(1.0% reading + 10 digits)

6kΩ

| 0.001kΩ| ±(0.8% reading + 5 digits)
60kΩ|

0.01kΩ

600kΩ

| 0.1kΩ
6MΩ|

0.001MΩ

60MΩ

| 0.01Ω|

±(2.0% reading + 10 digits)

Overload protection: 250V DC or 250V AC RMS

DIYODE AND CONTINUITY

RANGE

| FUNCTION
---|---
|

Display approximate forward voltage of diode, reverse shows OL

|

Built-in buzzer will be sounded if resistance is less than 30Ω

CAPACITANCE

RANGE

| RESOLUTION| ACCURACY
---|---|---
10nF| 0.01nF|

±(4.0% reading + 25 digits)

100nF

| 0.1nF| ±(4.0% reading + 15 digits)
1µF|

0.001µF

10µF

| 0.01µF
100µF|

0.1µF

1mF

| 1µF| ±(5.0% reading + 25 digits)
10mF|

10µF

100mF

|

100µF

Overload protection: 250V DC or 250V AC RMS

FREQUENCY

RANGE

| RESOLUTION| ACCURACY
---|---|---
10Hz|

0.01Hz

| ±(0.5% reading + 2 digits)

100Hz

| 0.1Hz
1kHz|

0.001kHz

10kHz

| 0.01kHz
100kHz|

0.1kHz

1MHz

| 0.001MHz
10MHz|

0.01MHz

Overload protection: 250V DC or 250V AC RMS

TEMPERATURE

RANGE

| -20°C – 1000°C
---|---
Resolution|

1°C

Accuracy

| -20°C – 0°C| ±(5% reading + 4 digits)
0°C – 400°C|

±(2% reading + 3 digits)

400°C – 1000°C

| ±(3% reading + 3 digits)
RANGE|

0°F – 1800°F

Resolution

| 1°F
Accuracy| -0°F – 50°F|

±(5% reading + 4 digits)

50°F – 750°F

| ±(2% reading + 3 digits)
750°F – 1800°F|

±(3% reading + 3 digits)

Overload protection: 250V DC or 250V AC RMS

MAINTENANCE

WARNING:

To avoid electric shock, disconnect the test leads from any source of voltage before removing the back cover or the battery cover
To avoid electric shock, do not operate the meter until the battery cover is in place and fastened securely

CLEANING AND STORAGE

Periodically wipe the case with a damp cloth and mild detergent, do not use abrasives or solvents. If the meter is not be used for a long time, remove the battery and shore it separately.

BATTERY INSTALLATION

To avoid the false readings, replace the battery as soon as the battery indicator appears.

Turn power off and disconnect the test leads from the meter.
Open the rear battery cover by using screwdriver.
Insert the battery into battery holder, observing the correct polarity.
Put the battery cover back in place, secure with the screws.

SPECIFICATIONS

Operating Temperature:	0~40°C
Operating Humidity:	< 80%RH
Storage Temperature:	-10°C~60°C
Storage Humidity:	< 70%RH (Remove Battery)
Max Input Voltage	1000VRMS
Measuring Principle	Double Integral A/D Conversion
Measurement Rate:	2 per second, nominal
Display	3 3/4 LCD display, max. reading 5999
Range Selection	Auto Range Selection
Over Range Indication	“OL”
Power Supply:	3 x AAA
Clamp Size:	23mm opening (approx)
Dimensions:	194(H) x 72(W) x 35(D)mm
Weight:	230g (including battery)

BOX CONTENTS

1 x Clampmeter
1 x Test Leads
1 x Carry Case
1 x Temperature Probe
1 x User Manual

WARRANTY

This product is protected by a lifetime warranty (from the date of purchase) covering all product manufacturing defects/faults that may occur within this timeframe. This warranty does not cover damage caused by neglect, misuse, contamination, alteration, accident or abnormal conditions of operation or handling, including failures caused by use outside of the product’s specifications, or the normal wear and tear of mechanical components.

In the event that you suspect your product is defective/faulty, cease using the product when the suspected defect/fault arises and return the product along with proof of purchase to the place of purchase or distributor for assessment. Distributor contact details are available below.

If the assessment concludes that the product is indeed defective/faulty, the product will either be repaired or replaced at no cost to you.

Our goods come with guarantees that cannot be excluded under the Australian Consumer Law. You are entitled to a replacement or refund for a major failure and compensation for any other reasonably foreseeable loss or damage. You are also entitled to have the goods repaired or replaced if the goods fail to be of acceptable quality and the failure does not amount to a major failure.

Distributed by: Electus Distribution Pty Ltd
46 Eastern Creek Dr, Eastern Creek NSW 2766 Australia
1300 738 555 | www.electusdistribution.com.au

Made in China