Reference Conditions; Dc Voltage - Metrix MX1 Notice De Fonctionnement

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Reference conditions

Reference
conditions
Specifications

DC voltage

Multimeter MX1
•
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.
•
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 0.5V
(1)
Range 15 (a) 50 (b)
(indication)
Reading x 10 x 0.01
coefficient
Internal
3kΩ 10kΩ
resistance
(2)
Accuracy (3)
Admissible 440V (fus.)
overload
(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
1.5V 5V 15V
15 (a) 50 (b) 15 (a)
x 0.1 x 0.1 x 1
30kΩ 100kΩ 300kΩ
2%
320V (4) 500V
440V (5)
50V 150V 500V
50 (b) 15 (a) 50 (b)
x 1 x 10 x 10
1MΩ 3MΩ 10MΩ
1000V 1500V
1500V
15 (a)
x 100
30MΩ
15