Operating Manual - John Morris Scientific

Ultra-Low Refrigerated Circulators
1. Use the keys to select the menu item.
2. With the keys select the parameter (parameter blinks)
or
use the numeral keypad to enter the numbers (number segment
blinks).
3. Press enter to store the new parameter or value.
Examples:
T T = 80.00 °C
T M = 79.73 °C
T T = 120.00 °C
T M = 119.51 °C
T T = 160.00 °C
T M = 159.34 °C
Control
>ControlType: intern
Selftuning: once
nein Dynamic : aperio
Example:
3-point calibration for internal control.
In the temperature range of 80 °C to 160 °C the calibration curve of the
temperature sensor (T T ) should be assimilated to the actual temperatures
on the measuring point (T M ).
Press the button. Under the menu >Control< set >ControlType<
to >intern< and press enter .
(ControlType: Can only be adjusted in the –OFF– condition)
Press start/stop .
Calibration procedure:
Setpoints
>Setpoint1: 80.00°C
Setpoint2: 37.00°C
Setpoint3: 70.00°C
1. Press and set the first temperature value under
>Setpoint1< for example (example 1 st value = 80 °C).
2. Wait until this temperature is maintained constant in the bath for
about 5 minutes.
3. Press the button and open the menu >ATCalibrationSensor : intern
Status : no
Type : 3.point
TmpValue1: 80.00°C
CalValue1: 79.73°C
TmpValue2: xx.xx°C
CalValue2: xx.xx°C
TmpValue3: xx.xx°C
CalValue3: xx.xx°C
4. Set the following:
Menu item >Sensor< to >intern< ,
Menu item >Status< to >no< ,
Menu item >Type< to >3-pointCalValue 1< (79.73 °C) using the
numeral keypad.
Press enter and the circulator also stores the value of T T as
value for >TmpValue 1< (80.00 °C) .
The first of the 3 points is now calibrated.
6. Repeat the calibration procedure for 120 °C and 160 °C.
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