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to stabilize and then take a temperature reading from a calibrated thermometer inside the chamber
bath. If the thermometer reads the same as the controller display, the temperature controller is
calibrated correctly. If there is a temperature variance, the temperature controller needs to be
calibrated.
As an example, if a calibrated thermometer reads 35.5
º
C and the Temperature Controller reads 36.5
º
C,
then the controller display ("CAL" function) needs to be reduced by 1.0
º
C. If the thermometer reads
37.5
º
C and the Temperature Controller reads 36.5
º
C, then the controller display ("CAL" function)
needs to be increased by 1.0
º
C.
To recalibrate the Temperature Controller:
1) Press and hold the Up and Down arrow keys until a controller program is displayed. (If the
"CnFg" prompt appears first, the Controller will need to be unlocked - refer to "Accessing the
Program Lockout").
2) Press the Down arrow key until the "PId" Menu prompt appears.
3) While pressing the SET key in (the digital readout will display "no"), press the Down arrow
key to display "yes", and then release the SET key.
4) Press the Up arrow once to display the "CAL" prompt.
5) While holding the SET key down, press either the Up or Down arrow keys to alter the
calibration program value.
6) To exit back to the main operating mode, release the set key and press the Up and Down
arrow keys simultaneously until the operating temperature appears on the digital display.
After making any calibration changes to the Temperature Controller allow the chamber temperature to
stabilize and make a new reading to verify that the controller is properly calibrated. Make any
additional adjustments as needed until the controller readout is properly calibrated.
B -Alarm System Test
To test that the High Alarm System is working properly, it is recommended to follow methods that
may be recommended by the AABB or other governing organizations for such alarm system checks.
A suggested method to activate an actual high alarm test condition is as follows:
