VACUUBRAND DVR 3 - Manual (Page 14)

Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check carefully
the validity of this document with respect to his product. Manual: 999072 / 12/01/2011
page 14 of 18
Technical data of the power supply unit:
Approval: II 2 G Ex ia IIC T5
Type: BVE 9V
PTB 98 ATEX 2206
U
N
= 9 V
I
N
= 23 mA
U
0
= 11.1 V
I
0
= 28.8 mA
P
0
= 79.8 mW
C
0
= 1.9 µF
L
0
= 50 µH
The user can replace the sealed power supply unit of vacuum gauges DVR 3 within the hazardous area
of category 2 (according to the approvals of power supply unit and vacuum gauge).
Note: Some of the components on the printed circuit board are sensitive to electrostatic discharge.
Do not touch components. Ground printed circuit board and person replacing power supply unit suit-
ably.
Attention: Use only genuine power supply unit BVE 9V. When using other power supply units the ap-
proval for use in explosive atmosphere is void!
The power supply unit must not be charged. Do not open the battery. Do not throw the battery into fire.
Do not heat over 100°C and do not bring in contact with water.
➨ Unscrew the four countersunk head screws
at the rear side of the housing by using a Phil-
lips screw driver.
➨ Open the housing carefully.
Attention: The two housing parts are con-
nected by the sensor cable.
➨ Remove the power supply unit from the hous-
ing rear part.
➨ Remove the two contact springs and insert
the springs into the new power supply unit.
➨ Insert the new power supply unit in the hous-
ing rear part.
☞ When reassembling the vacuum gauge,
make sure that the switch pad and the printed
circuit board are positioned correctly.
➨ Carefully screw both parts of the housing to-
gether.
power supply unit
switch pad pcb
contact spring
Replacement of power supply unit