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Operating Modes
Diagnostics
Display of calibration data, display of sensor data, sensor monitor, performing a
device self-test, viewing the logbook entries, display of hardware/software versions
of the individual components. The logbook can store 100 events (00...99). They can
be displayed directly on the device.
HOLD
Manual activation of HOLD mode, e.g., for replacing a sensor.
The signal outputs adopt a dened state. HOLD can also be activated via the exter-
nal input (see next page).
Calibration
Every sensor has typical characteristic values, which change in the course of the
operating time. Calibration is required to supply a correct measured value. The
device checks which value the sensor delivers when measuring in a known solution.
When there is a deviation, the device can be “adjusted“. In that case, the device dis-
plays the “actual“ value and internally corrects the measurement error of the sensor.
Calibration must be repeated at regular intervals. The time between the calibration
cycles depends on the load on the sensor. During calibration the device is in HOLD
mode.
During calibration the device remains in the HOLD mode until it is stopped by the
operator.
Conguration
You must congure the analyzer for the respective measurement task. In the “Cong-
uration“ mode you select the connected sensor, the measuring range to be transmit-
ted, and the conditions for warning and alarm messages. During conguration the
device is in HOLD mode.
Conguration mode is automatically exited 20 minutes after the last keystroke.
The device returns to measuring mode.
Service
Maintenance functions (current source, relay test), assigning passcodes, selecting
the device type (pH/oxy/conductivity), resetting to factory settings.
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