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.
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: 0.8V rms min. @ 20% to 80% duty cycle and <100kHz; 5V rms min @ 20% to 80% duty cycle and > 100kHz
Frequency measurement (electrical)
Range | Resolution | Accuracy |
40,00 Hz...10,000 kHz | 0,01 Hz...0,001 kHz | ± 0,5% m.v. |
- sensitivity: 1V rms
Duty cycle measurement
Range | Resolution | Accuracy |
0,10...99,9% | 0,01% | ±(1,2% m.v. + 2 digits) |
- pulse width: 100μs - 100ms,
- frequency width: 5Hz...150kHz.
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 |
- fr quency range: 50...1000Hz.
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 |
- 20A: 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 | ±(5,0% m.v. + 7 digits) |
400,00 nF | 0,01 nF | |
4,0000 μF | 0,0001 μF | ±(3,0% m.v. + 5 digits) |
40,000 μF | 0,001 μF | |
400,00 μF | 0,01 μF | |
4000,0 μF | 0,1 μF | ±(5,0% m.v. + 5 digits) |
40,000 mF | 0,001 mF |
Other technical data:
- power supply: 9V battery type 6LR61
- diode test: I=0,9mA, U0=2,8V DC
- continuity test: I<0,35mA, sound signal for R<35Ω
- over range indication: 0L displayed
- crest factor: ≤ 3 at full scale up to 500V; decreasing linearly to ≤ 1,5 at 1000V
- PEAK: captures peaks >1ms
- sampling rate: 2 times per second
- input impedance: 10MΩ (V DC), 9MΩ (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: 0,5A/1000V ceramic fast blow; A range: 10A/1000V 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 1000V 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 2000m
„m.v.”- measured value