User Manual

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16 Multimeter MX1
Reference conditions
Reference
conditions
• Temperature : 23°C ± 2K
• Humidity : 45% RH ± 5%
• Position : horizontal ± 2°
Ensure that the pointer is at zero before starting any measurements.
Zero adjustment: open the device. Mechanical zero adjustment is carried
out by turning the transparent cover on the back of the null meter.
Ensure that the switch is correctly positioned.
When an estimated measurement is unknown, place the switch at the
highest calibre, then gradually reduce it until the appropriate calibre is
achieved: the reading should preferably be in the upper 2/3 of the range.
Specifications
DC voltage • Connect the leads to the multimeter (be careful of switch position, see
below) and connect to the circuit to be controlled.
• When an estimated measurement is unknown, place the switch at the
highest calibre, then gradually reduce it until the appropriate calibre is
achieved.
• To obtain voltage in V, multiply the appropriate range value by the
reading coefficient indicated in the table.
V DC
150mV
(1)
0.5V 1.5V 5V 15V 50V 150V 500V 1500V
Range
(indication)
15 (a) 50 (b) 15 (a) 50 (b) 15 (a) 50 (b) 15 (a) 50 (b) 15 (a)
Reading
coefficient
x 10 x 0.01 x 0.1 x 0.1 x 1 x 1 x 10 x 10 x 100
Internal
resistance
(2)
3kΩ 10kΩ 30kΩ 100kΩ 300kΩ 1MΩ 3MΩ 10MΩ 30MΩ
Accuracy (3) 2%
Admissible
overload
440V (fus.) 320V (4)
440V (5)
500V 1000V 1500V
(1) Inputs between "COM" and "A" terminals, the other calibres between "COM" and "V Ω" terminals.
(2) specific R: 20kΩ/V
(3) in % of end of range
(4) for 1 minute
(5) for 20 seconds