CHART MVE 1842P-150, Руководство по эксплуатации и техническому обслуживанию

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MVE Biological Systems
TEC 3000 Operating and Maintenance Freezer Manual
13289499 Rev H •
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7.3. Calibration Procedures
7.3.1. Temperature Sensor Calibration
This section describes how to calibrate the TEC 3000 temperature sensors. There are
two calibration procedures: single point and two point calibration.
For single point calibration, the reference point is LN2. For two point calibration, the
reference points are LN2 and ice water. Unless regulations require a two point
calibration, the single point calibration procedure is recommended. The benefit of two
point calibration is more accurate temperature measurement in near room temperature
environments. The drawback is a longer, more complex calibration procedure. The
benefit of a single point calibration is a simple calibration procedure. The drawback of
single point calibration is less accurate temperature measurement in near room
temperature environments.
All new freezers equipped with TEC 3000 controllers have been calibrated at the factory.
The temperature sensors should only be calibrated if faulty readings are suspected, a
sensor or the TEC 3000 itself has been replaced, following a firmware update, or as a
part of a preventative maintenance schedule.
For an accurate calibration, the LN2 Saturation Temperature (Section 7.2.1.4) needs to
be correctly set based on the altitude of the freezer location.
NOTE: Security Level 2 or higher is required to calibrate temperature sensors.
CAUTION : Always wear protective gloves and face shield when handling
LN2. Refer to the Safety section of this manual.