Operating Manual
Page 35
9. Care and Maintenance
Only qualified personal shall be carrying out repair and maintenance work.
Always wear required personal protection equipment.
Opening covers or removing parts may expose live (electrical) connections.
9.1. Sensor & Module Service
For detailed maintenance and repair work on probes, follow separate sensor instructions in
the supplement packages.
9.2. Setting the Display Contrast
The contrast of the back-lit display depends on the viewing angle and the operating
temperature. In very poor conditions it is possible that there is very little contrast (high
operating temperature, flat viewing angle). In these cases, it is possible to adjust the contrast
using a potentiometer on the display board.
The Unit is connected to power.
Loosen the 4 cover screws and open the housing.
Adjust contrast potentiometer (P1) on the display board.
Close and fasten housing cover.
For following operations, the power must be disconnected from the unit. Strictly follow
all safety requirements.
9.3. Replacing the Main Power Fuse (F1)
The main power fuse (F1) is located on the mother board left side above the power terminals.
Disconnect power
Loosen the 4 cover screws and open the housing.
Replace fuse (F1), see section 4.5.
Close and fasten housing cover.
Connect power.
When closing the housing, ensure that the seal is not damaged and that it is sitting exactly
in the seal groove.
9.4. Replacing a Module
When inserting a new module, take care to ensure that all the pins are lined up with the socket
positions
Disconnect power
Loosen the 4 cover screws and open the housing.
Loosen and remove the fastening screw in the center of the module.
Remove the module.
