1 689 979 642
2014-11-03
|
Robert Bosch GmbH
24 | MMD 302 | Maintenance
en
6. Technical Data
6.1
General data
Designation
Value
Measurement speed
Digital displays 2 second
analog displays 20/second
Automatic appliance shut-off
Approx. 30 minutes after
last switch is pressed
Operating temperature
10 °C bis +40 °C
Storage temperature
-20 °C bis +60 °C
Temperature coefficient
0.1 x specific accuracy/°C
(<18 °C or <28 °C)
Relative humidity
0 % to 80 %
(0 °C to 50 °C)
Maximum usage altitude
2000 m
Type of protection
IP 20
Voltage supply
2 commercially available
dry batteries, 1.5 V Type Mi-
cro / AAA / AM4 / LR03 /
MN2400-1.5 V
Battery life
Approx. 1,000 hours with al-
kaline-manganese batteries
Dimensions
Without protective rubber cover:
with protective rubber cover:
185 mm x 86 mm x 32 mm,
200 mm x 98 mm x 52 mm
Weight
Without protective rubber cover
with protective rubber cover
370 g
600 g
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.
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.
