Omega Engineering OMB-CHARTSCAN 1400 User Manual page 161

Appendix A
TYPE
EXECUTION
SYNTAX
DESCRIPTION
Note: This command is only for advanced users who perform their own calibration. It is not necessary for
Active only in calibration mode, the Calibrate Channel Offset (
offset constants for a given slide-in 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
and calculate the offsets based on the present channel input voltage.
chan
Note: To achieve correct results 0.0 mV must be present at the desired channel prior to performing the
After the command has been issued, the precision voltage source must remain at its value at least until the
trigger LED stops flashing in order to achieve accurate results. Refer to Chapter 6 for more information
calibration.
EXAMPLE
PRINT#1, "OUTPUT07;K12345X"
PRINT#1, "OUTPUT07;H17X"
PRINT#1, "OUTPUT07;EX"
ChartScan User's Manual
- Calibrate Channel Offset
H
Calibration
Immediate
Calibrate the correction offset constants for given option card where
Hchan
where max = 128 for ChartScan/1400. The chassis is
normal, everyday operation.
command. The 0.0 mV value is obtained by placing a "short" across the applicable channel. Chapter 6,
Calibration, provides illustrations of various channel shorts.
the channel number such that
) command is used to calibrate the correction
H
' Enter Calibration Mode
' Connect short across applicable channel
' Calculate offsets for T/C card, card #2
' Wait for command to complete
' Remove precision voltage
' End Calibration Mode
< < ,
1 chan max
chan = 0
API Commands
is
chan
.
A-35