Protech QM1634 1000 Amp AC/DC Clampmeter

Introduction

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.

Safety Warnings

• ⚠️ 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.
• ⚠️ Remove the batteries from the meter if it will be unused for an extended period of time.

Functions Overview

Meter Description

The clampmeter features the following components:

• NCV Sensor: Detects non-contact voltage.
• Current Clamp: Used to measure current by clamping around a conductor.
• Clamp Trigger: Opens the jaws of the current clamp.
• Flash Light: Provides illumination.
• Backlight Button: Activates the LCD backlight. Can also turn on the flashlight when in current measurement mode.
• Auto/Manual Ranging Button: Selects autoranging or manual ranging.
• Function Button: Used for various functions depending on the mode.
• COM Input Jack: Negative input jack for test leads.
• LED Indicator: Provides visual feedback, e.g., for NCV detection.
• Data Hold: Freezes the current reading on the display.
• Function Switch (Rotary Switch): Selects measurement range and function.
• LCD Screen: Displays readings and measurements.
• Hz% Button: Selects between frequency and duty cycle under AC voltage measurement.
• Relative Button: Used for relative measurements or inrush/surge current measurement.
• V/TEMP Input Jack: Positive input jack for voltage and temperature measurements.

The battery compartment is located at the rear of the multimeter.

LCD Display Symbols

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.

1. Set the rotary switch to the proper current range, select the correct range based on measurement.
2. Press the clamp opening trigger to open the jaws and fully enclose one conducting wire.
3. Read the measured current value in the LCD display.
4. If display shows "OL", it means overload; select a higher range of measurements.
5. To shift between AC or DC current, press the 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.

1. Set the rotary switch to the V≈ position.
2. Insert the black test lead banana plug into the COM jack, insert the red test lead banana plug into the INPUT jack.
3. 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 the circuit.
4. Read the voltage value in the display.

NOTE: Unstable display may occur, especially at the low voltage range measurement (like 200mV range), even with no test leads inserted at input terminals; this is a normal situation and does not influence 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.

1. Set the function switch to the V≈ position.
2. Insert the black test lead banana plug into the COM jack, insert the red test lead banana plug into the INPUT jack.
3. 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 the circuit.
4. Read the voltage value in the display.

NOTE: Unstable display may occur, especially at the low voltage range measurement (like 2V range), even with no test leads inserted 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.

1. Set the function switch to the Ω position and press the SEL button to select the Ω range.
2. Insert the black test lead banana plug into the COM jack, insert the red test lead banana plug into the INPUT jack.
3. 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.
4. Read the resistance value in the display.

NOTE: Due to external interference sources, 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. External interference sources, such as flashlight, motor, etc., may cause the wrong detection.

Diode Test

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

1. Set the function switch to the + position and press the SEL button to choose diode test mode +.
2. Insert the black test lead banana plug into COM jack, insert the red test lead banana plug into INPUT jack.
3. Place the red test lead on the anode of diode and black test lead on the cathode of diode.
4. 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.

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

Temperature Measurement

1. 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.
2. 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.
3. Read the temperature on the display.

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 VΩ jack. Hold the insulation part of the black test lead and do not put it into the circuit under measurement. Contact the red test lead to the live wire; the buzzer of the meter will be activated and the red LED will be flickered. When the red test lead connects 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 contacting the earth line, the buzzer of the 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.

1. Set the rotary switch to the appropriate position and press the SEL button to choose the mode.
2. Insert the black test lead banana plug into COM jack, insert the red test lead banana plug into INPUT jack.
3. Touch the test probe tips across the capacitance under test.
4. 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

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

AC Voltage

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

DC Current

AC Current

Frequency response: TRMS 40Hz-1kHz

Resistance

Overload protection: 250V DC or 250V AC RMS

Diode and Continuity

Capacitance

Overload protection: 250V DC or 250V AC RMS

Frequency

Overload protection: 250V DC or 250V AC RMS

Temperature

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 to be used for a long time, remove the battery and store it separately.

Battery Installation

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

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

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.

Protech 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. Phone: 1300 738 555 | Website: www.electusdistribution.com.au