Measurement Computing TempScan/1100 - Manual (Page 124)

6-8 System Calibration 879596 TempScan / MultiScan User's Manual
These multiple channel values are indicated in the third table. Make sure that the channels selected with
the calibration command matches the channels connected to the precision thermocouple-calibration source.
Note: The following text discusses the manual method of calibration. However, we strongly
suggest using ChartView’s internal automated calibration method. To do so, from
ChartView navigate as follows, then follow the on screen instructions.
⇒ Device ⇒ Select Status ⇒ Calibration [then follow on screen prompts]
CAUTION
Scanning card calibration requires the use of a calibrated master unit chassis.
Calibration of Thermocouple Scanning Cards
Note: Prior to each calibration session, disable calibration protection by setting the rear panel DIP
microswitch 9 to the up (1) position. Then enable Calibration Mode via the Enter
Calibration Mode (
K ) command with a valid password. If the default calibration password
has not been changed, enter K12345 .
Note: At the end of each calibration session, disable Calibration Mode with the End Calibration
Mode ( E ) command. Then re-enable calibration protection by resetting DIP microswitch 9 to
the down (0) position.
To Calibrate a Thermocouple Card for Offset
1. Connect a Copper Short to Channel 1 on the scanning card being calibrated. Use standard copper
hookup wire. Do not use thermocouple wire. Slide the scanning card into the previously-calibrated
master chassis.
2. Power up the unit and wait at least one hour before continuing.
3. Send the Calibrate Channel Offset ( H ) command Hchan – where
chan
refers to the first channel
number on the scanning card being calibrated (refer to the previous table for valid offset channel
numbers) – and wait for the command to complete. The TRIGGER LED indicator will flash for a few
seconds.
4. Monitor the Calibration Status Register ( CSR ) to ensure that the Calibrate Channel Offset ( H )
command completed without error. Refer to the User Status ( U ) command U2 to monitor and decode
the Calibration Status Register ( CSR ).