Proline Low-temperature Thermostats
92
Starting up
YACE0072 / 21.08.07
Setting the overtemperature cut-off: Recommended setting: 5°C
above desired bath temperature.
Caution!!
The overheat switch-off point T
max
is controlled by a system
functioning independently of the bath control. Setting of the nominal
temperature, however, can be limited via the functions T
ih
and T
il
(
Ì
7.8.3) independently of T
max
.
−
The cut-off point is displayed in the LED display on pressing the
key
.
Changing the overtemperature cut-off point:
−
For safety, and to guard against unintentional adjustment, the key
must be held pressed during all the following entries. Now,
briefly press
. The display flashes and the overtemperature cut-
off can be set with the keys
or
.
−
Quit the change mode by pressing
for a few seconds or
automatically after 5 seconds, while you keep
pressed.
−
This somewhat complicated procedure is intended to prevent
unintentional adjustment.
−
Not higher than 25 °C below the fire point of the heat carrier liquid used (
Ì
Section
−
The setting range is restricted to 5°C above the upper limit of the working
temperature range ( Tih
Ì
kk
−
If the bath temperature rises above the overtemperature cut-off:
1. Alarm sounds as dual-tone signal.
2.
rDLMO
for overtemperature appears in the display.
3. The red LED
above the fault triangle
flashes.
Æ
Heater switches off on both poles,
Æ
Pump and refrigerating unit are switched off electronically.
−
Rectify cause of fault.
−
Wait until the bath temperature has cooled below the cut-off point
or set the cut-off point higher than the bath temperature. When
rDLMO
is shown in the display:
−
Unlock with the
key.
Unlocking is not possible on the Command Console!
−
Before longer periods of unsupervised operation, the
overtemperature protection
should be checked. To do this
Overtemp. cut-off
8/
°C
Overtemp. alarm
rDLMO
°C
Summary of Contents for RP 1290
Page 2: ......
