Omega Engineering OMB-CHARTSCAN 1400 User Manual page 111

1. Ensure the main unit is powered "OFF," and has no power sources connected to it.
2. If a signal conditioning card is in slot #1 of the chassis, remove the card.
3. Install Calibration Card into Slot #1 (bottom slot) of the main unit.
4. With all covers in place, allow the main unit and calibration equipment to warm up (powered on) for at
least 1 hour.
5. Place the Calibration Enable/Disable Pushbutton (on main unit rear-panel) in the "enable" (indent)
position to enable writing to RAM.
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).
6. If the calibration password has not been changed, enter
enter the K command and new password. This enables the calibration mode.
7. Type
8. Insert banana plugs of shorting option (shorting bar or 3 linked plugs) into -V, +V, and GND binding
posts of calibration card. This short circuits the analog backplane HI and LO voltage inputs and GND
(see previous figure, Calibration Card and Two Shorting Options).
9. Type
stops, the chassis offset calibration is complete.
10. Type
occurred.
Response codes and meanings applicable to calibration are as follows:
Response to
ChartScan User's Manual
Do not perform calibration until after the main unit and calibration equipment
have been powered on for at least one hour.
ChartScan users: Early production ChartScan units do not have a Calibration Enable/Disable Pushbutton.
to verify calibration mode.
U2X
. The Trigger LED will flash, indicating that offset calibration is in progress. When flashing
H0X
. should appear, indicating the unit is in calibration mode and that no error has
U2X U128
Indication for Calibration Mode
U2X
No error
U128
Read Failure (EEPROM Error)
U129
Write Failure (EEPROM Error)
U130
Chksum Err (EEPROM Error)
U132
Cal Err (offset, gain, or temperature
U136
Invalid password
U144
Invalid command
U160
CAUTION CAUTION CAUTION CAUTION
K12345
should appear, indicating the unit is in calibration mode.
U128
sensor out of range)
. If the password has been changed,
Calibration 6-7