Voltmeter CM-9940 
voltmeter to measure up to 600 A AC / DC

This voltmeter can measure both direct and alternating current. The CM-9940 Voltmeter also has basic functions of direct and alternating current, resistance, frequency, transit and diodes. The voltmeter is a very useful instrument for the technical service of domestic appliances due to its small size (only 30mm). The CM-9940 voltmeter has overload protection for all functions and ranges. Here you will find an overview of all voltmeters available from PCE Instruments.

• LCD display with 4 positions, 10.8 mm and a maximum of 5000 (frequency range)

• It can measure up to 600 A AC/DC

• Maximum diameter of the conductive element: 30 mm

• Data Hold; automatic change of the measurement range

• Measurement of the transit and the relative value

• Security: IEC-1010-1; CAT III 600 V

• Delivery contents: carrying case, testing cables, batteries and user's manual

CM-9940 Voltmeter

DCV

400 mV            ± 0.5 % + 2 dgt - 0.1 mV
4/40/400/600 V ± 1.0 %+ 2 dgt-0.1mV/0.01/0.1/1V

Overload protection

AC/DC 600 V

ACV

4/40/400/600 V
± 1.2 % + 5 dgt. - 0.1 mV/0.01/0.1/1V

Overload protection

AC/DC 600 V

DCA

400/600 A
± 2 % + 5 dgt. - 0.1 A/ 1A

Overload protection

AC/DC 600 A

ACA

400/600 A
± 2 % + 8 dgt. - 0.1 A/ 1A

Overload protection

AC/DC 600 A

Ohms

400 mΩ/ 4/40/400 kΩ
± 1 % + 5 dgt. - 0.1/ 1/ 10/ 100 Ω
4 MΩ
± 2 % + 2 dgt. - 0.1 Ω
40 MΩ
± 3.5 % + 3 dgt. - 0.1 Ω

Overload protection

AC/DC 400 V

Frequency

5 / 50 / 500 Hz/ 5 / 50 / 100 kHz
± 1 % + 5 dgt. - 0.001/0.01/0.1/1 Hz/ 0.01/0.1 kHz

Acoustic signal

yes

Diode test

yes

Power

2 x 1.5 V (UM3, AA)

Diameter of the conductive element

maximum of 30 mm

Dimensions

178 x 64 x 33 mm

Weight

230 g

The CM-9940 voltmeter measuring the car battery

Definition and information about Voltmeter:

The voltmeter is a meter for electrical quantities that combines various measurement modes and ranges in a single device. The standard features of a voltmeter allow for the measurement of volts and current at different ranges. Usually the voltmeter can switch between the measurements of voltage (DC) and alternating current (AC). The voltmeter also forms part of the basic measurement ranges of resistance and it is usually also a measure of continuity with a beeper. The digital voltmeter is more modernly equipped and thus allows for additional measurements such as frequency, capacitance and temperature measurements.
The analog voltmeter shows the value with an indicator in different scales for different ranges. The reading values ​​are presented with discrete marks. To avoid errors in reading (parallax error), the high quality measuring instruments  have a mirror that contains a scale that allows the measurement value to be read properly. The accuracy of the analog voltmeter can be up to 1% of the reading in high-quality devices. As instruments, they are often used with a  mobile coil. Formerly, they were electromagnetic devices with a mobile palette. The ranges of AC voltage and current are usually not as accurate because you have to pre-connect a rectifier system in the measuring system of mobile coil.

Here you will find an overview of all the measuring instruments available at PCE Instruments.

Contact:
PCE Instruments UK Limited
Units 12/13 Southpoint Business Park
Ensign Way, Southampton
United Kingdom, SO31 4RF
Phone. +44 ( 0 ) 2380 98703 0
Fax +44 ( 0 ) 2380 98703 0

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Below you will find an overview of the different product groups of measuring instruments