How is a thermal calibration performed on an All Weather Refrigerated Sampler (AWRS)?

Document ID

Document ID TE9324

Version

Version 1.0

Status

Status Published

Published Date

Published Date 02/20/2018
Question
How is a thermal calibration performed on an All Weather Refrigerated Sampler (AWRS)?
Summary
AWRS Thermal Calibration
Answer
Prerequisites:
Ice bath in a 500 mL beaker, using a 50/50 mix of crushed ice and water
Lab grade thermometer
 
Common (AS 950, SD 900 and 900 MAX) Procedure:
1. Turn off the sampler controller
2. Remove pull out tray from refrigerator cabinet.
3. Remove the Refrigerator Temperature Sensor (CRTS) from the bracket, and place the
beaker/ice bath next to the bracket.
4. Place the sensor and the lab grade thermometer in the beaker/ice bath.
5. With the sampler controller off and the door closed, wait approximately 30 minutes for
the refrigerator temperature sensor and lab thermometer to stabilize with the ice bath
temperature.
6. After waiting 30 minutes, mix (swirl) the ice bath.
7. Turn on the sampler controller.
8. Continue calibration procedure based on controller
 
AS 950 controller
1. From the Main Menu select Hardware Setup, Thermal, Calibrate Thermal.
2. The screen displays the current temperature read by the controller. Use the arrow
keys to enter the reading indicated on the thermometer in the ice bath to the nearest
hundredth degree AC and select OK. This completes the calibration procedure.
3. Install the CRTS.
 
SD 900 controller
1. From the Main Menu, select SYSTEM SETUP, THERMAL SETUP, CALIBRATION.
2. The screen displays the current temperature read by the controller. In degrees AC,
enter the reading indicated on the thermometer in the Ice bath, to the nearest one
tenth degree, next to the ACTUAL temperature display and press ENTER. This
completes the calibration procedure.
3. Install the CRTS.
 
900 MAX controller
1. Go to MAIN MENU, OPTIONS, ADVANCED OPTIONS, CALIBRATION. Press
SELECT.
2. Highlight THERMAL SETUP and press SELECT.
3. Highlight THERMAL CALIBRATE and press SELECT.
4. The screen displays the current temperature read by the controller. In degrees AC,
enter the reading indicated on the thermometer in the ice bath, to the nearest one
tenth degree, next to the actual temperature display and press ACCEPT. This
completes the calibration procedure.
5. Install the CRTS.

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