Changing The Fuses; Technical Data; General Data; Measurement Category As Per En 61010 - Bosch MMD 302 Original Instructions Manual

en 24 | MMD 302 | Maintenance
5.6

Changing the fuses

The fuses may only be changed when the
MMD 302 is not connected to a measurement
object!
!
Only fuses with the following specifications may be used:
$
Fuse F1: 1 A/600 V IR 10KA fast acting fuse (Buss-
mann BBS-1, Littelfuse BLS 1 A or similar rating)
Dimensions: 10.3 x 35 mm
$
Fuse F2: 15 A/600 V IR 10KA fast acting fuse
(Bussmann KTK 15, Littelfuse KLK 15A or similar
rating)
Dimensions: 10.3 x 38 mm
Fig. 3: Changing the fuses
1 Housing upper section
2 Housing lower section
3 F1 (1A/600V)
4 F2 (15A/600V)
1. Disconnect the measuring cables from the measure-
ment object and the MMD 302.
2. Turn the measurement-mode switch to the OFF position.
3. Remove the three screws from the back of the appliance.
4. Lift the lower end of the housing lower section until
it clicks out of the housing upper section.
5. Remove the battery holder.
6. Lift the PCBs vertically out of the housing upper
section.
7. Replace faulty fuse.
8. Reinsert PCBs.
9. Reinsert the battery holder in the appliance. During
reassembly, ensure that the battery cables are not
crushed.
10. Check the o-rings and the rubber seal are positioned cor-
rectly between the housing upper and lower sections.
11. Reattach the housing lower section. Ensure that it
clicks into position at the upper end of the housing.
12. Reinsert and tighten the three screws.
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6.

Technical Data

6.1

General data

Designation
Measurement speed
Automatic appliance shut-off
Operating temperature
Storage temperature
Temperature coefficient
Relative humidity
Maximum usage altitude
Type of protection
Voltage supply
Battery life
Dimensions
Without protective rubber cover:
with protective rubber cover:
Weight
Without protective rubber cover
with protective rubber cover
6.2 Measurement category as per
EN 61010
EN 61010-2-033:2012 specifies the general safety re-
quirements for hand-held measuring instruments and
defines the measurement categories from 0 to IV.
Both the MMD 302 and the terminals and measurement
cables supplied are designed for test and measurement
circuits of category III. The maximum permissible volt-
ages for CAT III = 600 V must never be exceeded.
Value
Digital displays 2 second
analog displays 20/second
Approx. 30 minutes after
last switch is pressed
10 °C bis +40 °C
-20 °C bis +60 °C
0.1 x specific accuracy/°C
(<18 °C or <28 °C)
0 % to 80 %
(0 °C to 50 °C)
2000 m
IP 20
2 commercially available
dry batteries, 1.5 V Type Mi-
cro / AAA / AM4 / LR03 /
MN2400-1.5 V
Approx. 1,000 hours with al-
kaline-manganese batteries
185 mm x 86 mm x 32 mm,
200 mm x 98 mm x 52 mm
370 g
600 g
Robert Bosch GmbH