Operating Manual - John Morris Scientific

Ultra-Low Refrigerated Circulators
-OFF-
S xx.xx
E xx.xx
ControlType: Can only be adjusted in the -OFF- condition
Possible parameters:
intern internal temperature control
extern external temperature control with external Pt100 sensor
ext.
Pt100
IMPORTANT:
Additional measures for external temperature control.
Connect a Pt100 sensor to the socket on the rear of the circulator.
Sensor calibration of the external Pt100 sensor is carried out in the menu
>ATCalibration Status< set to >no< (see page 59).
Suggested adjustments for external temperature control:
AreaUp/ AreaDown and IntMax / IntMin
see chapter >Limits< on page 56.
External temperature control does not allow for setpoint setting via the
socket „ext. Pt100“ (see page 32).
Notice:
Place the external sensor into the bath medium and securely fix the sensor.
Selftuning:
When performing an selftuning for the controlled system (temperature
application system), the control parameters Xp, Tn and Tv are automatically
determined and stored.
Possible parameters:
off - no selftuning.
The control parameters ascertained during the last identification are used
for control purposes.
once – single selftuning (factory setting)
The instrument performs a single selftuning of the controlled system after
each start with the start/stop key or after receiving a start command
via the interface.
always – continual selftuning
The instrument performs a selftuning of the controlled system whenever
a new setpoint is to be reached.
Use this setting only when the temperature application system changes
permanently.
37