Omega Engineering OMB-CHARTSCAN 1400, Руководство пользователя

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ChartScan User’s Manual Calibration 6-5
Calibration Without ScanCal
Password
To perform calibration, the calibration mode must be enabled. The Enter Calibration Mode (
K
) command
enables calibration, where
keyword
is the five-digit keyword (or password) currently configured for the
unit. Your scanning unit is shipped with a default password of
12345
. This password can be modified by
the Change Calibration Keyword (
*K
) command, once Calibration Mode has been entered. Calibration
mode is ended by executing the End Calibration Mode (
E
) command.
Attempts to execute calibration commands without entry into calibration mode will result in a
calibration status error.
If the password is lost or forgotten, a new password can be entered after enabling the calibration mode.
This mode is enabled by indenting the
Calibration Enable/Disable Pushbutton . After pushing in the button,
execute the
*K
command to change the existing password. For more information, refer to the Hardware
Protected RAM section on page 6-2.
Disable writing to RAM after successfully changing the password by setting the Calibration
Enable/Disable Pushbutton to the disable (non-indent) position.
Note to ChartScan users: Early production ChartScan units do not have a Calibration Enable/Disable
Pushbutton . 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).
Mode Indicator
To denote whether or not calibration mode has been activated, bit 7 in the Calibration Status Register will
be set after a valid
K
command has been executed. This bit is cleared by the
E
command (see “
E Command
”
in Appendix A).
You can verify the register status by the
U2
command. A response of
U128
indicates that the unit is in the
calibration mode.
U2,
in the command reference section (Appendix A) contains details regarding this
command.
Command Active Indicators
Since the calibration commands require a few seconds to complete, bit 6 in the Calibration Status
Register will be set and the trigger LED will flash to indicate that a calibration command is active .
When these indicators are off, a subsequent calibration step can be started.