Measurement Computing TempScan/1100 - Manual (Page 232)

A-36 API Command Reference 889897 TempScan / MultiScan User’s Manual
H
- Calibrate Channel Offset
TYPE Calibration
EXECUTION Immediate
SYNTAX Hchan Calibrate the correction offset constants for given option card where chan is
the channel number such that 1 < chan < max , where max = 992 for the
TempScan/1100 and max = 744 for the MultiScan/1200. The chassis is
chan = 0 .
DESCRIPTION
Note: This command is only for advanced users who perform their own calibration. It is not necessary
for normal, everyday operation.
Active only in Calibration Mode, the Calibrate Channel Offset ( H ) command is used to calibrate the correction
offset constants for a given scanning card. The channel offset values are necessary in order for the internal
firmware to accurately interpret readings coming from the input channels. This command will take the parameter
chan and calculate the offsets based on the present channel input voltage.
For more information on manual calibration, see chapter System Calibration.
Note: To achieve correct results, a short must be connected across the desired channel before performing this
command. After the command has been issued, the precision voltage source must remain at its value at
least until the TRIGGER LED indicator stops flashing.
EXAMPLE
PRINT#1, “OUTPUT07;K12345X” ‘ Enter Calibration Mode
‘ Connect short across the desired channel
PRINT#1, “OUTPUT07;H524X” ‘ Calculate offsets for slave card 16 (TempScan/1100)
‘ Wait for command to complete
‘ Remove precision voltage
PRINT#1, “OUTPUT07;EX” ‘ End Calibration Mode