Omega Engineering OMB-CHARTSCAN 1400 User Manual page 160

API Commands
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 Gain (
constants for a given slide-in card. The channel gain value is necessary in order for the internal firmware to
accurately interpret readings coming from the input channels. This command will take the parameters
and will calculate the gain based on the present channel input voltage.
type
Note: To achieve correct results, this command must be issued twice. First with a negative input voltage and
Each time the command has been issued, the precision voltage source must remain at its value until the trigger
LED stops flashing. For further details on channel calibration, see Chapter 6.
EXAMPLE
PRINT#1, "OUTPUT07;K12345X"
PRINT#1, "OUTPUT07;G17,1"
PRINT#1, "OUTPUT07;G17,1"
PRINT#1, "OUTPUT07;EX"
A-34
- Calibrate Channel Gain
G
Calibration
Immediate
Calibrate the correction gain constants for given option card where
Gchan,
type
where max = 128 for ChartScan/1400. The chassis is
type
normal, everyday operation.
then with a positive input voltage.
the channel number such that
is the channel type.
) command is used to calibrate the correction gain
G
' Enter Calibration Mode
' Apply negative precision voltage
' Calculate (-) gain for T/C card, card #2
' Wait for command to complete
' Apply positive precision voltage
' Calculate (+) gain for T/C card, card #2
' Wait for command to complete
' Remove precision voltage
' End Calibration Mode
< < ,
1 chan max
chan = 0
ChartScan User's Manual
Appendix A
is
chan
.
and
chan