Multimeter Maintenance; Fuse Self-Test; Battery Self-Test - Metrix MX 57 EX Manual De Instrucciones

Chapter II
3.5.

Multimeter maintenance

Any internal intervention can only be performed outside the danger zone.

3.5.1. Fuse self-test

F1 Fuse: When the switch is set to the µA mA position and the (0.500 A, 125 V) F1 fuse
of intrinsic safety is cut, the display shows "FUSE".
Replace it by a fuse of identical model.
F2 Fuse : The (1 A, 600 V, 30 kA) F2 fuse does not have automatic control. To check it,
set the switch to the continuity test position, connect the COM input and the V
input by a cord; if the buzzer is active, the (1 A) F2 fuse is in good condition, if
the buzzer is not active, F2 is out of order.
Replace it by a fuse of identical model.
Note When the F2 fuse is cut, replace it : voltage measurements are possible,
but the specifications are not guaranteed any more. The other types of
measurements are not possible any more.

3.5.2. Battery self-test

When the "BAT" indication is displayed continuously on the display, the instrument still has
approximately 10 hours of operation (in V
guaranteed.
Replace the battery.
3.5.3. Replacing the battery or one fuse
When changing parts (performed outside the danger zone only, EX class), check
that a fuse of the correct calibre and specified type is used.
Use of a non-compliant fuse and short-circuiting of the fuse holder are strictly prohibited.
Use only a 9 V battery (6LF22, 6LR61) verified as being on the certified list. It is prohibited
to use batteries other than those specified.
Certified batteries : See the list on page 43 of this user manual.
Certified fuse :
Open the multimeter casing as follows (refer to last page of the manual) :
1. Remove the stand from the back of the instrument.
2. Remove the front cover using the stand as a lever.
3. Remove the flexible seal.
4. Unscrew the screw maintaining the sealed casing located under the movable panel.
5. Replace the battery or fuse.
Before using the unit, check that the flexible seal and the upper case cover are carefully
repositioned.
3.5.4. Cleaning
Clean the multimeter using a damp cloth and soap. Let it dry before using. Do not use
abrasives or solvents.
Intrinsically safe portable digital multimeter
mode), but specifications can no longer be
DC
CAUTION: The temperature class depends on the battery used.
F1 intrinsically safe fuse 0.5 A, 125 V
LITTLEFUSE : part-number 259.500
F2 fuse 1 A, 600 V, 30 kA, 6 x 32 mm
X02137C00 - Ed. 5 - 05/12
Figures 1 and 2
Figure 3
31