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CMM-40 Multimeter CAT III/1000V TRMS AC/DC

Regular price $252.00

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Industrial multimeter CMM-40 was designed for the purpose of measurements of AC/DC voltage, AC/DC current, resistance, capacitance, frequency (electrical and electronic), duty cycle, temperature and also for testing diodes and continuity.


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The most important features of CMM-40 are:


  • autoranging/manual range selection,

  • „DATA HOLD” function, for holding measured values,

  • „REL” function, which allows you to make measurements relative to a stored reference value,

  • „MAX/MIN” function,

  • „PEAK HOLD” function,

  • memory for 2000 measurement resultS,

  • continuity test with acoustic signalling (beeper),

  • „AUTO-OFF” function,

  • display 4¾ digits (40000 max),

  • double molded, waterproof casing.


Frequency measurement (electronic)











































Range Resolution Accuracy
40,000 Hz 0,001 Hz
±(0,1% m.v. + 1 digit)
400,00 Hz 0,01 Hz
4,0000 kHz 0,0001 kHz
40,000 kHz 0,001 kHz
400,00 kHz 0,01 kHz
4,0000 MHz 0,0001 MHz
40,000 MHz 0,001 MHz
100,00 MHz 0,01 MHz not speccified


  • Sensitivity: 0.8 V rms min. @ 20% to 80% duty cycle and <100 kHz; 5 V rms min @ 20% to 80% duty cycle and > 100 kHz



Frequency measurement (electrical)














Range Resolution Accuracy
40,00 Hz...10,000 kHz 0,01 Hz...0,001 kHz ± 0,5% m.v.


  • sensitivity: 1 V rms


Duty cycle measurement













Range Resolution Accuracy
0,10...99,00% 0,01% ±(1,2% m.v. + 2 digits)


  • pulse width: 100μs - 100 ms,

  • frequency width: 5 Hz...150 kHz.


Temperature measurement



















Range Resolution Accuracy
-50,0°C...+1200,0°C 0,1°C ±(1% m.v. + 2,5°C)
-58,0°F...+2192,0°F 0,1°F ±(1% m.v. + 4,5°F)

DC voltage measurement































Range Resolution Accuracy
400,0 mV 0,01 mV ±(0,06% m.v. + 4 digits)
4,0000 V 0,0001 V
40,000 V 0,001 V
400,00 V 0,01 V
1000,0 V 0,1 V ±(0,1% w.m. + 5 cyfr)


AC voltage measurement (True RMS)































Range Resolution Accuracy
400,00 mV 0,01 mV ±(1% m.v. + 40 digits)
4,0000 V 0,0001 V ±(1% m.v. + 30 digits)
40,000 V 0,001 V
400,00 V 0,01 V
1000,0 V 0,1 V


  • frequency range: 50...1000 Hz.



AC/DC current measurement (True RMS)






























Range Resolution Accuracy
400,00 μA 0,01 μA dla DC ±(1,0% m.v. + 3 digits)

dla AC ±(1,5% m.v. + 30 digits)

4 000,0 μA 0,1 μA
40,000 mA 0,001 mA
400,00 mA 0,01 mA
10,000 A 0,001 A


  • 20 A: 30 sec max with reduced accuracy.


Resistance measurement




































Range Resolution Accuracy
400,00 Ω 0,01 Ω ±(0,3% m.v. + 9 digits)
4,0000 kΩ 0,0001 kΩ ±(0,3% m.v. + 4 digits)
40,000 kΩ 0,001 kΩ
400,00 kΩ 0,01 kΩ
4,0000 MΩ 0,0001 MΩ
40,000 MΩ 0,001 MΩ ±(2,0% m.v. + 10 digits)

Capacitance measurement







































Range Resolution Accuracy
40,000 nF 0,001 nF ±(3,5% m.v. + 40 digits)
400,00 nF 0,01 nF
4,0000 μF 0,0001 μF ±(3,5% m.v. + 10 digits)
40,000 μF 0,001 μF
400,00 μF 0,01 μF
4000,0 μF 0,1 μF ±(5% m.v. + 10 digits)
40,000 mF 0,001 mF

Other technical data:


  • power supply: 9 V battery type 6LR61

  • diode test: I=0,9 mA, U0 = 2,8 V DC

  • continuity test: I<0,35 mA, sound signal for R<35 Ω

  • over range indication: 0L displayed

  • crest factor: ≤ 3 at full scale up to 500 V; decreasing linearly to ≤ 1,5 at 1000 V

  • PEAK: captures peaks >1 ms

  • sampling rate: 2 times per second

  • input impedance: 10 MΩ (V DC), 9 MΩ (V AC)

  • display: 40000 counts backlit LCD with bargraph, 4¾ digits

  • store capacitance: 2000

  • dimensions: 187 x 81 x 55 mm

  • weight: 342 g

  • fuses: mA, µA range: 0,5 A/1000 V ceramic fast blow; A range: 10 A/1000 V ceramic fast blow

  • auto power OFF: 15 min.

  • accordance with following standards: EN 61010 - 1:2004, EN 61010 - 2 - 032


Electric security:


  • type of insulation: double, according to EN 61010 - 1 and IEC 61557

  • measurement category: CAT III 1000 V acc. to EN 61010 - 1:2004

  • protection class acc. to EN 60529: IP67


Rated operational conditions:


  • operating temperature: 0...+40°C

  • storage temperature: -20...+60°C

  • operating humidity: max 80% up to 87°F (31°C); decreasing linearly to 50% at 104°F (40°C)

  • operating altitude: max 2000 m


„m.v.”- measured value