B&C CL 7685 Operator's Manual page 7

B&C Electronics CL 7685
- Simulated operation (SIM.):
This mode of operation would normally only be used for control system troubleshooting.
The unit does not provide the measuring values, but will allows the relays to be manually activated and
the analog output corresponding to the values on the display, to be manually selected by the operator.
The display does not indicate the measuring units (PPM) and access to calibration of the parameters is
not allowed.
The message "SIM" is shown on the display, indicating the current operation mode of the instrument.
Calibration mode
The instrument may be programmed for the immediate or postponed calibration.
The immediate calibration mode allows the operator to calibrate the unit immediately against a field
measurement on the same sample that the sensor is measuring.
The postponed calibration mode allows the operator to calibrate the unit against a laboratory
measurement on the same sample that the sensor is measuring.
The calibration may be performed later even if the sample concentration
that the sensor is measuring has changed.
Software filter
The unit is provided with a programmable software filter, to be inserted when the readout is not stable.
In order to maintain a satisfactory speed of response of the system it is suggested to insert a time value
which is equal to 1/2 or 1/4 the response time of the sensor itself.
Configuration
The electronics for the monitor is designed to be as flexible as possible.
A number of programming functions are provided in the Configuration menu and are protected by an
access number, which must be entered to allow changes in this setting.
The routine allows programming of a custom access code number.
Front panel lock
The keys on the front panel of the monitor can be used for both changing the display and for
calibrations and set-point adjustments.
When the monitor is shipped, all functions are accessible.
However, the adjustment and calibration functions may be locked in order to prevent unauthorized
adjustments to the instrument.
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Operator's Manual - Rev. C - 05/05 7