Omega Engineering OMB-NETSCAN 1500 User Manual page 107

1. Connect HI, LO, -S, and +S lines from the precision calibrator to the binding posts of the calibration
card, as indicated in the figure above.
2. Apply -4.4 VDC (minus 4.4 VDC) from the calibrator to the calibration card. Use a precision digital
multimeter to verify voltage accuracy.
Note: You can view the main unit calibration constants by typing:
C#0X QC?
To monitor the chassis calibration voltage type:
*B
C3,90X
T1,1,0,0X;@X
U13X
Voltage will appear in counts. For 4.4 volts the reading should be 32038.844 counts.
Note that
3. Type
flashing stops, the chassis gain calibration is complete.
4. Type
occurred.
5. Apply +4.4 VDC (positive 4.4 VDC) from the calibrator to the calibration card. Use a precision digital
multimeter to verify voltage accuracy.
6. Type
flashing stops, the chassis gain calibration is complete.
7. Type
occurred.
Response codes and meanings applicable to calibration are as follows:
Response to
8. Type
9. Position the Calibration Enable/Disable Pushbutton in the "non-indent" (disable) position.
Note to
For these units the calibration mode is enabled by positioning the DIP switch right-most micro-switch (#9) to the "1"
(up) position. Note that ChartScan units with the pushbutton have it located on the rear panel, as indicated in the
NetScan figure (page 6-2).
10. Remove power from the main unit and all connected devices.
11. Remove the calibration card from the chassis.
You are now ready to calibrate the signal conditioning cards as described in the following sections of this
chapter.
NetScan User's Manual
... selects the main unit (chassis)
...to clear the buffer
...to address the backplane
...to trigger the acquisition (Trigger LED flashes);
...very entry of U13X results in an updated value of voltage in counts
can be used to start or stop the acquisition.
@X
. The Trigger LED will flash, indicating that gain calibration is in progress. When
G0,91X
. should appear, indicating the unit is in calibration mode and that no error has
U2X U128
. The Trigger LED will flash, indicating that gain calibration is in progress. When
G0,91X
. should appear, indicating the unit is in calibration mode and that no error has
U2X U128
U2X Indication for Calibration Mode
U128 No error
U129
Read Failure (EEPROM Error)
U130
Write Failure (EEPROM Error)
U132
Chksum Err (EEPROM Error)
U136
Cal Err (offset, gain, or temperature
U144
Invalid password
U160
Invalid command
. The calibration mode is disabled.
EX
ChartScan users: Early production ChartScan units do not have a Calibration Enable/Disable Pushbutton.
sensor out of range)
starts acquisition
@X
Calibration 6-9