Pb= 2.01C Proportional band setting
Tochange the proportional band press “UP” or “DOWN”.
Pb=3.50C New proportional band setting
Toaccept the new setting and access the cut-out set-point press “SET”.
Pressing“EXIT” will exit the secondary menu ignoring any changes just made
to theproportional band value.
SAccept the new proportional band setting
8.10 Cut-out
As a protection against softwareor hardware fault or user error, the calibrator is
equipped withan adjustable cut-out device that will shut off power to the heater
if the well temperature exceedsa set value. This protects the instrument and
probes from excessivetemperatures. The cut-out temperature is programmable
by the operator from thefront panel of the controller.
If the cut-out is activatedbecause of excessive well temperature then power to
the heater willbe shut off and the instrument will cool. The well will cool until
it reaches a fewdegrees below the cut-out set-point temperature. At this point
the action of the cut-out is determined by the setting of the cut-out mode pa-
rameter.The cut-out has two modes — automatic reset or manual reset. If the
mode is set to automatic, then the cut-out will automatically reset itself when
the temperature falls belowthe reset temp erature allowingthe w ellto heat up
again. If the mode is set to manual, then the heater will remain disabled until
the user manually resets the cut-out.
The cut-outset-point may be accessed within the secondary menu. Press “SET”
and “EXIT” toenter the secondary menu and show the heater power. Then
press “SET” twice to access the cut-out set-point.
S+E Access heater power in secondary menu
-12 Pct Heater power in percent
SAccess proportional band
Pb= 2.01C Proportional band setting
SAccess cut-out set-point
36 HartScientific
8Controller Operation