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13.4 Calibration
Adjustment
Thermo Scientific Recvo Blood Bank Refrigerators
This recorder has been accurately calibrated at the factory and retains
calibration even during power interruptions. If required, however, adjustments
can be made as follows:
1. Run the unit continuously at the control setpoint temperature.
Continue steady operation for at least two hours to provide adequate
time for recorder response.
2. Measure cabinet solution temperature with a calibrated temperature
monitor. (Solution temperature is measured inside the sensor bottles
— refer Section 11.2.)
3. Compare the recorder temperature to the solution temperature. If
necessary, adjust the recorder by pressing the left (#1) or right (#2)
chart buttons for five seconds.
Note The stylus does not begin to move until the button is held for five seconds.
Chart Recorders
Installation and Operation
27
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