24 GOSSEN METRAWATT GMBH
Setpoint Ramps
Function Parameters SPuP and SPdn cause a gradual temperature change
(rising / falling) in degrees per minute.
Activation – When auxiliary power is switched on
– When the current setpoint is changed
– When setpoint 2 is activated
– After switching from manual to automatic operation
Setpoint display The targeted setpoint is displayed (not the currently valid setpoint) with a blinking r at the
left-hand digit.
Limit values Relative limit values make reference to the ramp, not the targeted setpoint. As a rule, no
alarm is triggered for this reason.
Balancing
Thermocouple Correction (parameter: CAL)
The correction value is selected in °C or °F. The displayed correction value is added to the measured
temperature.
Cable Compensation for Pt 100 with 2-Wire Connection (parameter: CAL)
The correction value can be determined automatically in the “Off” mode:
– Short circuit the sensor at the measuring point.
–Set the CAL value to Auto.
Measured cable resistance is converted to temperature change and is entered as the CAL value.
Balancing can also be performed manually if the sensor temperature is known:
CAL = known sensor temperature – displayed temperature value
Scaling for Heating Current Monitoring (parameter: A H)
The default setting for the GTZ 4121 is 42.7 A. If the GTZ 4121 current transformer is not used for acquiring
heating current, the current value must be selected at which the utilized transformer generates an output
voltage of 10 V DC.
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