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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, "M#0X"
PRINT#1, "W#32X"
PRINT#1, "D#12X"
PRINT#1, "Y0,10,0X"
PRINT#1, "C1-128,1X
PRINT#1, "T1,8,0,0X"
PRINT#1, "@X"
TYPE
EXECUTION
SYNTAX
DESCRIPTION
Note: This command is only for advanced users who perform their own calibration. It is not necessary for
To use this command the unit must be in Calibration Mode. The End Calibration Mode (
used to take the unit out of Calibration Mode. Once this command has been executed the unit will no longer be
in Calibration Mode and the Enter Calibration Mode command (
Chapter 6, Calibration contains additional information.
EXAMPLE
PRINT#1, "K12345X"
PRINT#1, "H17X"
PRINT#1, "G17,1X"
PRINT#1, "G17,1X"
PRINT#1, "J1,2,90.0X"
PRINT#1, "EX"
NetScan User's Manual
D#
System
Deferred
D#make
Specify how long to wait after closing a channel relay before reading valid
D#
) command allows the user to increase the delay between closing a relay and
- End Calibration Mode
E
Calibration
Immediate
E
Terminate Calibration Mode
normal, everyday operation.
- Set Relay Make Time
data, where
is the number of 520.833-microsecond intervals.
make
make
' 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 – 128 for J type thermocouples
' Arm the unit
' Trigger unit and collect scans
K
) must be issued to re-enter Calibration Mode.
' Enter Calibration Mode
' Apply precision voltage
' Will calculate offsets for card #2
' Wait for command to complete
' Apply precision voltage of -50.0 mV
' Calibrate negative gain for TC for card #2
'Wait for command to complete
' Apply precision voltage of +50.0 mV
' Calibrate positive gain for TC for card #2
' Wait for command to complete
' Apply temperature of 90.0 °C
' Calibrate cold junction offset for channel 1 on card 1
' Wait for command to complete
' Remove precision voltage
' End Calibration Mode
API Command Reference
=
6
= 3.125 milliseconds.
command as shown
D#
E
) command is then
A-21
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