
GOSSEN-METRAWATT GMBH
36
Set point ramps
Function
The parameters
SPuP
/
SPdn
cause a gradual change in temperature (rising/falling) in degrees per minute.
Activation when:
– The auxiliary voltage is turned on
– An actual set point is changed
– The second set point is activated
– Changing from manual to automatic mode
Set point display
The default set point is shown by a flashing
r
in the left digit, not the actually valid value.
Limit values
Relative
limit values make reference to the ramp, not the target value. For this reason, no alarm is triggered
as a rule.
Heating current monitor
Function
The heating current is acquired via an external transformer (e.g. GTZ 4121).
An alarm is issued when, with the heater switched on (control output I active), the current set point is fallen below by more
than 20 %, or when, with the heater switched off, the current is not "off". The alarm is only cleared when, with output I
active, the heating current is high enough and no current flows with output I inactive.
The monitor is inactive if the controller is switched to
oFF
and with continuous and step controller.
Current set point
AMPS
The nominal phase current of the heater must be entered for this parameter. For automatic setting,
AMPS
must be set to
Auto
with the heater switched on. The actually measured current is stored.
Содержание R2600
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