Omega Engineering OMB-CHARTSCAN 1400 User Manual page 153

Appendix A
TYPE
EXECUTION
SYNTAX
DESCRIPTION
The Set Relay Make Time (
reading valid channel data. The system powerup default is:
If common mode voltages on adjacent channels are widely dissimilar, reading inaccuracies can result. This
inaccuracy is due to inadequate settling time at the instrumentation amplifier when the unit is scanning between
channels. To eliminate these inaccuracies, the settling time can be increased using the
in the example below.
EXAMPLE
PRINT#1, "OUTPUT07;M#0X"
PRINT#1, "OUTPUT07;W#32X"
PRINT#1, "OUTPUT07;D#12X"
PRINT#1, "OUTPUT07;Y0,10,0X"
PRINT#1, "OUTPUT07;C1-360,1X
PRINT#1, "OUTPUT07;T1,8,0,0X"
PRINT#1, "OUTPUT07;@X"
ChartScan User's Manual
- Set Relay Make Time
D#
System
Deferred
Specify how long to wait after closing a channel relay before reading valid
D#make
data, where
) command allows the user to increase the delay between closing a relay and
D#
is the number of 520.833-microsecond intervals.
make
= = 3.125 milliseconds.
make 6
' Select Normal mode
' Select number of samples = 32
' Set Relay Make Time = 12 = 6.25 milliseconds
' Setup to read 10 past trigger scans
' Enable channels 1 - 360 for J type thermocouples
' Arm the unit
' Trigger unit and collect scans
API Commands
command as shown
D#
A-27