Thermo Scientific 3960, Руководство по эксплуатации и техническому обслуживанию

Страница: 16 / 54

29 cu ft Environmental Chamber 2-1 Thermo Scientific
Section 2
Calibration
After the unit has stabilized, several different systems can be calibrated. In
the calibration mode, the air temperature, CO2 and RH levels can be
calibrated to reference instruments. To access the calibration mode, press
the Mode key until the Cal indicator lights. Press the right and/or left
arrow until the proper parameter appears in the message center. See Chart
2-1 at the end of this section for more detail.
Calibration frequency is dependent on use, ambient conditions and
accuracy required. A good laboratory practice would require at least an
annual calibration check. On new installations, all parameters should be
checked after the stabilization period.
Prior to calibration, the user should be aware of the following system
functions. While the unit is in Calibration mode, all system control
functions are stopped so the unit remains stable. Readout of the system
being calibrated will appear on the message center. If no keys are pressed
for approximately five minutes while in Calibration mode, the system will
reset to Run mode so control functions are reactivated.
Caution
Before making any calibration or adjustments to the unit, it is
imperative that all reference instruments be properly calibrated.
s
Before calibration, allow the cabinet temperature to stabilize. Place the
calibrated instrument in the center of the chamber. The instrument should
be in the airflow, not against the shelf.
Calibrate the
Temperature