Parameter Adjustments; Moisture Sensor Fuse - Raychem EMDR-10 Handbuch

3.2 Parameter adjustments

The following parameters can be set by means of the respective dial:
Adjustment of the air temperature threshold.
1 2
0 3
The moisture sensor is being put into operation below this value.
–1 4
–2 5
–3 6
°C
Adjustment of the moisture threshold.
5 6
4 7
Above this value the heating cable is being energized, if the air temperature is below
3 8
the setpoint.
2 9
1 10
1 = max. sensitivity, 10 = min. sensitivity
Adjustment of the lower temperature limit.
–15
–20
Below this value the heating cable will be switched off. At the same time the mois-
–10
–25 ture measurement will be switched off.
–5
TEST
In addition this dial can be used to test the unit by turning the potentiometer shaft
°C
to the left stop. After that the heating cable (resp. contactor) will be energized for
max. 10 minutes. If the shaft is turned to the right again during these 10 minutes
then the TEST will be stoped and the unit works in normal operation mode with the
adjusted lower temperature limit.
If the potentiometer is left in the TEST position then the unit will automatically
return to normal operation mode after the test period of 10 minutes and works with
a lower temperature limit of –25°C
This lower temperature limit can be set to a different value at any time.
A new test period can be activated by turning the shaft from the left stop to the right
(minimum to –20°C) and then back again to the left stop.
Adjustment of the post-heating period.
20 30 40
The correct adjustment of the post-heating period is dependent on the local weather
50
10
conditions, the location, and the requested heating power.
60
0
The conditions have to match with the requirements for an economical operation.
min
Minimum time over which the heating cable stays activated when the conditions of
temperature and humidity are no longer met e.g. temperature increases above set
level or moisture is lower than set level.
Use the following table as a guide:
Description
Air temperature threshold
Moisture threshold
Lower temperature limit
Post-heating period
Periodic inspection: It is recommended to inspect and test the control unit as well as the heating
cable circuits annually.

3.3 Moisture Sensor Fuse

The control unit is equipped with a fuse in the output for the moisture sensor which protects
this output against overload and short circuit. In case this fuse has to be replaced you may
exclusively use a fuse (5 x 20 mm) type T1A according to IEC127-2/V. Other fuse types are not
permissible and may lead to serious damage of the unit.
Suggested setting
+2°C
5
–15°C
60 minutes
9