Knick Stratos Evo A402, User Manual

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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. The logbook can be extended to 200 entries
using a TAN (Option).
HOLD
Manual activation of HOLD mode, e.g., for replacing a sensor. The signal outputs
adopt a defined state.
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.
Configuration
You must configure the analyzer for the respective measurement task. In the “Con-
figuration“ mode you select the adjusted measuring function, the connected sensor,
the measuring range to be transmitted, and the conditions for warning and alarm
messages. During configuration the device is in HOLD mode.
Configuration mode is automatically exited 20 minutes after the last keystroke.
The device returns to measuring mode.
Service
Maintenance functions (current source, relay test, controller test), passcode assign-
ment, device type selection, reset to factory settings, enabling of options (TAN).