Knick Stratos Pro A401B PH, User Manual

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Diagnostics
Display of calibration data, display of sensor data, performing a device
self-test, viewing the logbook entries, display of hardware/software ver-
sions 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 digital 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 cor-
rect 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 displays 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
The analyzer must be configured for the respective measurement
task. In the “Configuration“ mode you select 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), IrDA
operation, passcode assignment, reset to factory settings, enabling of
options (TAN).
Operating Modes