Calibration Memory Write Enable/Disable

ChartScan’s constants for chassis calibration and the calibration password are stored by ChartScan in Non-Volatile RAM (NV-RAM). The password is a safety feature used to prevent unauthorized personnel from entering calibration mode and altering the calibration constants.

As a safeguard, the calibration password and chassis calibration constants are hardware protected by use of a Calibration Enable/Disable switch (pushbutton, or micro-switch, as described in the following notices). Calibration mode disabled is the factory default setting. This setting should not be changed, unless you want to change the password or chassis calibration constants.

CAUTION

Ensure calibration mode is “disabled” during normal ChartScan operation. Otherwise, the calibration password and calibration constants may become corrupt and normal operation may be disrupted.

Standard ChartScan units have a Calibration Enable/Disable Pushbutton.

If it is necessary to change the calibration password (via the *K command) or to calibrate the chassis, the calibration mode can be enabled by indenting the pushbutton. For details on calibration, refer to Chapter 6, ChartScan Calibration.

Early production ChartScan units do not have a Calibration Enable/Disable Pushbutton. These units enable and disable the calibration mode using micro-switch number 9 (on the DIP switch).

If it is necessary to change the calibration password (via the *K command) or to calibrate the chassis, the calibration mode can be enabled by setting micro-switch 9 to the “up” (1 position). For details on calibration, refer to Chapter 6, ChartScan Calibration.

RS-232/422 Interface Configurations

Configuring RS-232/422 Parameters

CAUTION

The RS-232/422 interface is only to be used for serial communications. Cable length should not exceed 50 feet (15 meters).

•The DIP switch is only read when power is first applied to ChartScan, and for that reason must be set before applying power to the unit.

•RS-232 configuration is required when using a Net232 ethernet/RS-232 converter.

Note: Unless an interface option is used, ChartScan’s serial port operation will be with RS-232 electrical characteristics. For serial port use, ChartScan’s rear panel DIP switch settings determine the baud rate, stop bits, parity, and handshake.

Use the following steps when you desire to change RS-232/RS-422 serial port parameters. Note that there are separate steps for early production units.

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ChartScan User’s Manual

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Omega Vehicle Security 1400 manual RS-232/422 Interface Configurations, Calibration Memory Write Enable/Disable
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1400 specifications

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