
5.4 Operating mode: HOLD
HOLD operating mode is provided for the maintenance of the
device and contains the outputs and alarms. In this operating mode
the 4 ... 20 mA and alarms are frozen. This operating mode can be
used to ensure that no accidental changes are made to the device.
This operating mode switches off after 15 minutes and returns to
AUTO operating mode.
Call up the HOLD operating mode of the device by pressing the UP
or DOWN arrow keys until the arrow lights up beside
‘HOLD’ and
then press the EXIT key.
Once this has been selected, the letters at the top change from
‘OFF’ to ‘ON’ .
A3414
Fig. 9: OFF
HOLD operating mode can be used during all maintenance func‐
tions, such as, for example, replacing the cuvette or dessicant,
without the alarms or the 4... 20 mA output signals being adversely
affected.
Operating diagram
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