CM 7 - Multimeter PCE Instruments - Free user manual and instructions

Product Type	Digital Multimeter (DMM)
Model	CM 7
Brand	PCE Instruments
Display	LCD with backlight, 6000 counts
DC Voltage Range	600 mV to 600 V
AC Voltage Range	600 mV to 600 V
DC Current Range	600 μA to 10 A
AC Current Range	600 μA to 10 A
Resistance Range	600 Ω to 60 MΩ
Capacitance Range	60 nF to 60 mF
Frequency Range	60 Hz to 60 kHz
Temperature Measurement	-20°C to 1000°C (with type K thermocouple)
Diode Test	Yes
Continuity Test	Yes, with audible buzzer
Data Hold	Yes
Auto Power Off	Yes, after approx. 15 minutes
Power Supply	2 x AAA 1.5 V batteries
Dimensions	180 x 84 x 50 mm
Weight	Approx. 320 g (including batteries)
Safety Rating	CAT III 600 V, CAT II 1000 V
Accessories Included	Test leads, thermocouple, carrying case, manual
Warranty	2 years

Frequently Asked Questions - CM 7 PCE Instruments

How do I measure DC voltage with the PCE Instruments CM 7?

Set the rotary switch to V⎓ (DC voltage). Connect the black test lead to COM and red to VΩmA. Touch the probes to the circuit and read the display.

What is the maximum voltage the CM 7 can measure?

The CM 7 can measure up to 600 V in DC and AC. For higher voltages, use a suitable voltage divider or probe.

How do I measure current with the CM 7?

For current up to 600 mA, connect the red lead to μAmA jack; for up to 10 A, use the 10A jack. Set the rotary switch to A⎓ or A~ and connect in series.

Does the CM 7 have a continuity test?

Yes, select the continuity function (usually a diode/continuity symbol). The buzzer sounds if resistance is less than 50 Ω.

How do I replace the batteries in the CM 7?

Turn off the meter, remove the screw at the back, lift the battery compartment cover, and replace the two AAA 1.5 V batteries. Reattach the cover.

What does 'CAT III 600 V' mean?

It means the meter is rated for Category III installations up to 600 V, suitable for measuring on distribution circuits, fixed equipment, and branch circuits.

Can I measure temperature with the CM 7?

Yes, using the included type K thermocouple. Set the rotary switch to °C/°F, insert the thermocouple, and touch the probe to the object.

How do I use the data hold function?

Press the HOLD button once to freeze the current reading on the display. Press again to release and continue measuring.

What should I do if the display shows 'OL'?

'OL' means Overload, the input exceeds the selected range. Switch to a higher range if available, or avoid measuring such high values with this meter.

How do I clean the CM 7?

Use a soft, damp cloth with a mild detergent to clean the casing. Do not use abrasive cleaners or immerse in water. Dry before use.

USER MANUAL CM 7 PCE Instruments

This meter is a double impedance high performance true RMS digital clamp meter, which integrates multiple functions, makes your work easier, more efficient and safer.

It can measure AC/DC voltage, AC/DC current, frequency, duty, resistance, capacitance, temperature, diode, NCV, VFD, inrush current, etc.

High Input Impedance Voltage Measurement:

When measuring in a circuit, it has little effect on circuit performance. This is the desired effect for most voltage measurement applications and is especially important for sensitive electronic or control circuits.

Low Input Impedance Voltage Measurement(LoZ V):

It can safely troubleshoot sensitive electronic or control circuits and circuits that may contain false voltages, and can more reliably determine whether there is a voltage on the circuit.

SAFETY INFORMATION

Warning

Please read this manual carefully before using this product.

"WARNING" mark indicates the condition and operation which may cause danger to users.

"CAUTION" mark refers to the condition and operation which may cause damage to the instrument or equipment.

Warning

»Please read this manual carefully.

» Use the instrument strictly according to this instruction, otherwise the protection function provided by the instrument may be damaged or weakened.

» Please be careful if the measurement exceeds 30V AC true RMS, 42V AC peak or 60V DC. There may be danger of electric shock at this kind of voltage.

» Voltage applied between terminals or between each terminal and grounding point shall not exceed the rated value.

» By measuring the known voltage to check whether the meter work is normal, if it is not normal or damaged, do not use it again.

» Before using the instrument, please check whether there are cracks in the instrument shell or plastic parts damaged. If so, please do not use again.

» Before using the instrument, please check whether the probe is cracked or damaged. If so, please replace the same type and the same electrical specifications.

» Do not exceed the lowest rated Category of Measurement (CAT) rating in products, probes or accessories.

» Do not measure the current when the probe is inserted into the input jack.

»Don't work alone.

»Please comply with local and national safety code.

» Wear personal protection equipment (such as approved rubber gloves, masks and flame retardant clothes, etc.) to prevent being damaged by electric shock and electric arc due to exposed hazardous live conductor.

» When it shows low battery indicator, please replace the battery in time in case of any measurement error.

» Do not use the instrument around explosive gas, steam or in wet environment.
» When using the probe, please put your fingers behind the finger protector of the probe.
» When measuring, please connect the neutral wire or the ground wire firstly, then connect the live wire; When disconnecting, please disconnect the live wire firstly, then disconnect the neutral wire and ground wire.
» Before opening the outer cabinet or battery cover, please remove the probe on the instrument. Do not use the instrument in the circumstances that the instrument is taken apart or battery cover is opened.
» It only meets the safety standards when the instrument is used together with the supplied probe. If the probe is damaged and needs to replace, the probe with same model number and same electrical specifications must be used for replacement.

SAFETY SYMBOLS

used	High voltage warning
	AC
	DC
	AC or DC
swarmal	Warning, danger
	Ground
	Double insulation/reinforced insulation protection
	Low battery
	Product complies with all relevant European laws
	Frequency converter
	Inrush current measurement
[zcz8]	Low Input Impedance Voltage Measurement
	The additional product label shows that do not discard this electrical/electronic product into household garbage.

PANEL DESCRIPTION

1. N CV senser
2. Clamp
3. Flashlight
4. Knob switch
5. Function key
6. Display
7. Measuring input jack
8. Trigger

1 2 3 4 5 6 7 8 9 00/600A WED INTUSS 1000A OFF VDD Hz% FUNC LPG NGLI/PE MAX MAX SET ZERO TRUE RMS AC/DC CLAMP METER MAXIMUM -18.8.8V AIDS ZERO WED MAXIMUM -18.8.8V CAT W 1000V MAX 1000V COM 750V~ INPUT

FUNCTION OPERATION

Function selection key

When there are multiple functions in one position, press this key to switch.

Range selection key

When the meter is turned on, the meter defaults to the AUTO range mode and displays the "auto" character.

It is effective in 60/600A, ACV, DCV and resistor functions. Press this key to enter the manual range mode, continue to press to enter the higher range until the highest range, and press again to return to the lowest range. In manual range mode, press this key for more than 2 seconds to return to automatic range.

Max/Min View Key

At current, voltage, resistance and temperature functions. Press this key to cycle through the maximum and minimum values; Press this key for more than 2 seconds to exit this mode. After entering this mode, the meter will automatically switch to manual range. When entering the maximum/minimum viewing mode, first press the range key to switch to the most suitable range.

Relative Value On/DC Current Zero Key

In DC current measurement mode, this key is zero. Before measuring DC current, if the display is not ZERO, press this key to turn on ZERO function first, and the display screen will display the „zero“ character In the current, voltage, resistance, capacitance and temperature, this key is the relative value key. Press this key to turn on relative value measurement, the display screen will display „REL“, and press it again to exit the relative value measurement function.

Data Hold/Flashlight Key

Press this key to turn on data hold, and the display screen displays „H“ character to show data locking. Press again to cancel; Press this key for more than 2 seconds to turn on or off the flashlight.

OPERATIONS

Auto power off

» No operation in 15 minutes. The meter will power off automatically to save battery energy. After automatic power off, press any key to power on.
» If you press the „FUNC“ key and keep, Then turn on the meter power, the auto power off function will be cancelled.

Inrush current measurement

» Turn the knob to à ,and select Proper range(60/600A or 1000A), Press „FUNC“ key until the “inrush” character is displayed
» Then press the trigger to open the clamp, clamp the conductor to be tested, and then slowly release the trigger until the clamp are completely closed, and determine whether the conductor to be tested is clamped in the center of the pliers, if the conductor is not in the center of the pliers, additional errors will occur.
» Turn on the equipment to be tested (such as motor) and then trigger the meter by inrush current.
»Read the measurement results on the display.

WARNING

» Before use, use the meter to test the known voltage or current, and confirm that the meter is in good condition.
» Pay special attention to safety when measuring high voltage to avoid electric shock or personal injury.

NOTE

» Please place the measured conductor in the center of the clamp head, otherwise additional error will occur.
»The measuring time of inrush current is about 100ms.

VFD current measurement

» Turn the knob to Ã, and select Proper range (60/600A or 1000A), Press „FUNC“ key until the „VFD“ character is displayed.
» Then press the trigger to open the clamp, clamp the conductor to be tested, and then slowly release the trigger until the clamp are completely closed, and determine whether the conductor to be tested is clamped in the center of the pliers, if the conductor is not in the center of the pliers, additional errors will occur.
»Read the measurement results on the display

WARNING

» Before use, use the meter to test the known voltage or current, and confirm that the meter is in good condition.
» Pay special attention to safety when measuring high voltage to avoid electric shock or personal injury.
» Please do not use VFD function to verify the presence of dangerous voltage or current, which may exceed the indicated value to avoid electric shock or personal injury.

NOTE

» Please place the measured conductor in the center of the clamp head, otherwise additional error will occur

AC/DC current measurement

» Turn the knob to Â, and select proper range (60/600A or 1000A), Press „FUNC“ key until the “DC” / „AC“, character is displayed.
» When measuring DC current and the display screen shows that it is not ZERO, first press the "REL/ZERO" key to clear it. The display screen shows the character „Zero“
» Then press the trigger to open the clamp, clamp the conductor to be tested, and then slowly release the trigger until the clamp are completely closed, and determine whether the conductor to be tested is clamped in the center of the pliers, if the conductor is not in the center of the pliers, additional errors will occur.
»Read the measurement results on the display.

WARNING

» Before use, use the meter to test the known voltage or current, and confirm that the meter is in good condition.
» Pay special attention to safety when measuring high voltage to avoid electric shock or personal injury
» Please do not use VFD function to verify the presence of dangerous voltage or current, which may exceed the indicated value to avoid electric shock or personal injury.

VFD Voltage measurement

» Turn the knob to V or LoZ V, Press „FUNC“ key until the „VFD“ character is displayed.
» Insert red probe to "INPUT" jack, insert black probe to "COM" jack.
» Connect the probe with voltage source or both ends of load in parallel for measurement.
»Read the measurement results on the display.

WARNING

» Before use, use the meter to test the known voltage or current, and confirm that the meter is in good condition.
» Pay special attention to safety when measuring high voltage to avoid electric shock or personal injury.
» Please do not use VFD function to verify the presence of dangerous voltage or current, which may exceed the indicated value to avoid electric shock or personal injury.

CAUTION

» When using LoZ V (low input impedance) measurement, the continuous measurement time cannot exceed 1 minute.
» Do not use LoZ mode to measure voltage in circuits that may be damaged by the low impedance of this mode.

AC/DC Voltage measurement

» Turn the knob to V or LoZ V,Press key „FUNC“ until the AC or DC character is displayed.
» Insert red probe to "INPUT" jack, insert black probe to "COM" jack.
» Connect the probe with voltage source or both ends of load in parallel for measurement.
»Read the measurement results on the display.

WARNING

» Before use, use the meter to test the known voltage or current, and confirm that the meter is in good condition.
» Pay special attention to safety when measuring high voltage to avoid electric shock or personal injury.
» Please do not use VFD function to verify the presence of dangerous voltage or current, which may exceed the indicated value to avoid electric shock or personal injury.

CAUTION

» When using LoZ V (low input impedance) measurement, the continuous measurement time cannot exceed 1 minute.
» Do not use LoZ mode to measure voltage in circuits that may be damaged by the low impedance of this mode.

NOTE

»High input impedance: approx. 10MΩ.
»Low input impedance: approx. 300kΩ.

Frequency/duty measurement

»Turn the knob to Hz%

» Insert red probe to "INPUT" jack, insert black probe to "COM" jack.

» Connect the probe with voltage source or both ends of load in parallel for measurement.

»Read the measurement results on the display.

WARNING

» Before use, use the meter to test the known voltage or current, and confirm that the meter is in good condition.

» Pay special attention to safety when measuring high voltage to avoid electric shock or personal injury.

Resistance measurement

»Turn the knob to

» Insert red probe to "INPUT" jack, insert black probe to "COM" jack.

» Connect the probe to the both ends of resistor or circuit to be tested for measurement.

»Read the measurement results on the display.

WARNING

» When measuring circuit impedance, determine that the power supply is disconnected and the capacitor in the circuit is completely discharged.

Continuity test

» Turn the knob to ⬤️, Press key „FUNC“ until the Symbol ➕ is displayed.

» Insert red probe to "INPUT" jack, insert black probe to "COM" jack.

» Connect the probe to the both ends of resistor or circuit to be tested for measurement.

» If the resistance value of the tested resistor or circuit is less than about 30Ω, and the LED indicator light is on at the same time, The resistance value will be displayed.

WARNING

» When measuring circuit continuity, determine that the power supply is disconnected and the capacitor in the circuit is completely discharged.

Diode test

» Turn the knob to 📂, Press key „FUNC“ until the Symbol ➤ is displayed.
» Insert red probe to "INPUT" jack, insert black probe to "COM" jack.
» Connect the red probe to diode anode and connect the black probe to diode cathode.

»Read the measurement results on the display.

WARNING

» When measuring diode, determine that the power supply is disconnected and the capacitor in the circuit is completely discharged.

Capacitance measurement

» Turn the knob to ^-1 , Press key „FUNC“ until capacitance function.
» Insert red probe to "INPUT" jack, insert black probe to "COM" jack.
» Connect the probe to the both ends of capacitance to be tested for measurement.

»Read the measurement results on the display.

WARNING

» When measuring capacitance, determine that the power supply is disconnected and the capacitor in the circuit is completely discharged.

Temperature measurement

»Turn the knob to °C / °F

» Insert the K-type thermocouple, the positive pole (red) of the thermocouple into the "INPUT" jack, and the negative pole (black) into the "COM" input.

»Contact the thermocouple probe with the measured object.

»Read the measurement results on the display.

WARNING

» When measuring temperature with thermocouple, the probe of thermocouple can't touch the charged object, otherwise it may damage the instrument and may suffer electric shock or personal injury.

NOTE

» It takes a long time for the cold end of thermocouple to be restored in the meter to achieve thermal balance with the environment.

Non-contact AC Voltage (NCV) Detection

»Turn the knob to NCV/LIVE, the "NCV" symbol is displayed
»Then NCV sensor gradually approaches the detected point.

» When a weak electromagnetic field signal is sensed, the „---L“ character is displayed, the buzzer emits a slow beep sound, and the green LED indicator light is on.

» When a strong electromagnetic field signal is sensed, the „---H“ character is displayed, the buzzer emits a quick beep sound, and the red LED indicator light is on

NOTE

» When using NCV function, please remove the probe, otherwise the detection Sensitivity will be affected.

Live Detection

» Turn the knob to NCV/LIVE, Press key „FUNC“ until the “LIVE” Symbol is displayed.

»Insert red probe to "INPUT" jack.

» Connect the red probe to the conductor to be tested for measurement.

» When a low voltage is detected, the „---L“ character is displayed, the buzzer emits a slow beep sound, and the green LED indicator light is on.

» When a high voltage is detected, the „---H“ character is displayed, the buzzer gives a quick beep sound, and the red LED indicator light is on.

»In general, the fire line detected at this time

NOTE

» When using Live function, please remove the black probe, otherwise the detection Sensitivity will be affected.

GENERAL TECHNICAL SPECIFICATIONS

»Environment condition of using:

Safety: IEC 61010-1, Pollution level 2

IEC 61010-2-032: CAT III 1000V / CAT IV 600V

IEC 61010-2-033: CAT III 1000V / CAT IV 600V

Altitude < 2000m.

Working environment temperature and humidity:

0 ... 40°C (<80% RH, <10°C non condensing);

Storage environment temperature and humidity:

-10 ... 60°C (<70% RH, remove the battery);

» Temperature coefficient: 0.1 accuracy/°C (<18°C or >28°C);

MAX. Voltage between terminals and earth ground: AC750V or DC1000V;

» Display: 6000 counter readout. Automatically display the unit symbols according to the shift of the measurement function;

»Over range indication: displays "OL";

» Low battery indication: when the battery voltage is lower than the normal working voltage, “☐” will be displayed;

»Input polarity indication: automatically display “-”.

»Clamp opening size: 40mm;

»Auto power off: approx. 15 minutes;

»Power: 2 x 1.5V AAA alkaline batteries.

ACCURACY SPECIFICATIONS

The accuracy applies within one year after the calibration.

Reference condition: the environment temperature 18^ C to 28^ C, the relative humidity is no more than 80% accuracy: ±(% reading + word).

DC current

Range Resolution Accuracy
60A 0.01A		±(2.5%reading+8)
600A 0.1A
1000A 1A

MAX current: 1000A

NOTE: Press ZERO key to clear before measurement.

AC current

Range Resolution Accuracy
60A 0.01A ±(2.5%reading+8)
600A 0.1A VFD: ±(5.0%reading+10)
1000A 1A INRUSH: ±(5.0%reading+10)

MAX current: 1000A; True RMS

Frequency range: 0.1 ... 600A; 40Hz ... 400Hz; 600 ... 1000A; 40Hz ... 60Hz.

DC voltage

Range Resolution Accuracy
600mV 0.1mV		±(0.5%reading+5)
6V 0.001V
60V 0.01V
600v 0.1V
1000V 1V ±(0.8%reading+5)

Input impedance: 10MΩ (LoZ:300kΩ)

Overload protection: AC750V / DC1000V

Maximum input voltage: AC750V / DC1000V

Note: In the small voltage range, when the probe is not connected to the measuring circuit, the meter display reading may not be zero, which is normal and will not affect the normal measurement.

AC voltage

Range Resolution Accuracy
600mV 0.1mV		±(0.8%reading+5)
6V 0.001V
60V 0.01V
600v 0.1V
750V 1V ±(1.0%reading+5)
VDF(750V) 0.1V ±(2.0%reading+5)

Input impedance: 10MΩ (LoZ:300kΩ)

Overload protection: AC750V / DC1000V

Maximum input voltage: AC750V / DC1000V

Frequency range: 40Hz ... 1kHz; True RMS

Note: In the small voltage range, when the probe is not connected to the measuring circuit, the meter display reading may not be zero, which is normal and will not affect the normal measurement.

Resistance

Range Resolution Accuracy
600Ω 1Ω		±(1.0%reading+5)
6KΩ 0.001 KΩ
60KΩ 0.01 KΩ
600KΩ 0.1KΩ
6MΩ 0.001 MΩ
60MΩ 0.01 MΩ

Overload protection: 250V

Diode/Continuity

		Test Voltage Approx. 1VOverload protection: 250V
	It displays the approximate forward voltage value of the diode	Forward DC current is about 1.5mAOverload protection: 250V

Capacitance

Range Resolution Accuracy
10nF 0.001nF		±(4.0%reading+5)
100nF 0.01nF
1000nF 0.1nF
10μF 0.001μF
100μF 0.01μF
1000μF 0.1μF
10mF 0.001mF
100mF 0.01mF ±(5.0%reading+10)

Overload protection: 250V

Frequency/duty

Range Resolution Accuracy
10Hz 0.001Hz		±(1.0%reading+3)
100Hz 0.01Hz
1000Hz 0.1Hz
10KHz 0.001KHz
100kHz 0.01kHz
1000kHz 0.1kHz
10MHz 0.001MHz ±(3.0%reading+3)
1~99% 0.1%

Overload protection: 250V;

Hz/Duty:

Range: 0 ... 10MHz

Voltage sensitivity: 0.5 ... 10V AC

(As the frequency increases, the voltage should increase accordingly.)

Through mode V:

Range: 10Hz ... 10 kHz

Voltage sensitivity: >0.5V AC

(As the frequency increases, the voltage should increase accordingly).

Clamp measuring frequency:

Range: 10Hz ... 1 kHz

Current sensitivity: >20A

(As the frequency increases, the current should increase accordingly).

Temperature

Unit Accuracy
°C -20 °C ... 0 °C ±3 °C
	0 °C ... 400 °C ±1.0% or ±2 °C
	400 °C ... 1000 °C ±2.0%
°F -4 °F ... 32 °F	±6 °F
	32 °F ... 752 °F	±1.0% or ±4 °F
	752 °F ... 1832 °F	±2.0%

Note: The above precision does not include the error of thermocouple probe.

MAINTENANCE

To avoid electric shock, remove the probe before opening the battery cover or back cover. General maintenance.

» Maintenance and service of this instrument must be carried out by professional qualified maintenance personnel or maintenance department.
» Use wet cloth or mild detergent regularly to clean the shell. Do not use abrasives or solvents. Wipe the contacts in the socket with a clean cotton swab soaked in alcohol.

BATTERY INSTALLATION OR REPLACEMENT

The meter uses three AAA 1.5V alkaline batteries.

Please install or replace the batteries according to the following steps.

»Turn off the power of the meter and remove theprobe.

» Use screwdriver to unscrew the screw that fixes the battery cover and remove the battery cover.

» Remove the old battery and install the new battery according to the polarity of the battery marked in the battery box.

» After installing the new battery, cover the battery cover and lock the screw.

» To avoid the possibility of electric shock or personal injury caused by incorrect reading, replace the battery immediately when the BATTERY sign is displayed on the display screen.

» Please use the same type of batteries, do not use substandard batteries.

» In order to ensure safe operation and maintenance of the instrument, please take out the battery when not in use for a long time, in order to prevent damage to the product caused by battery leakage.

DISPOSAL

For the disposal of batteries in the EU, the 2006/66/EC directive of the European Parliament applies. Due to the contained pollutants, batteries must not be disposed of as household waste. They must be given to collection points designed for that purpose. In order to comply with the EU directive 2012/19/EU we take our devices back. We either re-use them or give them to a recycling company which disposes of the devices in line with law. For countries outside the EU, batteries and devices should be disposed of in accordance with your local waste regulations. If you have any questions, please contact PCE Instruments.

PCE INSTRUMENTS CONTACT INFORMATION

Germany France Spain

PCE Deutschland GmbH PCE Instruments France EURL PCE Ibérica S.L.

Im Langel 26 23, rue de Strasbourg Calle Mula, 8

D-59872 Meschede 67250 Soultz-Sous-Forets 02500 Tobarra (Albacete)

Chester Rd, Old Trafford

Manchester M32 ORS Capannori (Lucca)

United Kingdom

Tel: [phone]

Fax: [phone]

[e-mail]

www.pce-instruments.com/english

Italy

PCE Italia s.r.l.

Via Pesciatina 878 / B-Interno 6

55010 Loc. Gragnano

Pehlivan Sok. No.6/C

Türkiye

Tel: [phone]

www.pce-instruments.com/turkish

The Netherlands

PCE Brookhuis B.V.

Twentepoort West 17

7609 RD Almelo

Nederland

Telefoon: [phone]

[e-mail]

www.pce-instruments.com/dutch

United States of America

PCE Americas Inc.

1201 Jupiter Park Drive, Suite 8

Jupiter / Palm Beach

33458 FL

USA

Tel: [phone]

Fax: [phone]

[e-mail]

www.pce-instruments.com/us

Denmark

PCE Instruments Denmark ApS

Birk Centerpark 40

7400 Herning

Denmark