Commissioning; Running-In Time - ProMinent DULCOTEST PAA 1-mA-200 ppm Operating Instructions Manual

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8

Commissioning

CAUTION
• The power supply for the measuring equipment and the
measuring cell must not be interrupted. If power is inter-
rupted for a long period (>24 hrs) commissioning should
be re-started (run-in and calibrate the sensor).
• Do not switch off the measuring system during interval
operation! After operation without peracetic acid, running-in
periods are to be reckoned with.
If required, switch on metering unit time-delayed!
If no peracetic acid is metered for a longer period of time, the
sensor must be disconnected from the power supply and
stored dry.
• The current signal should not exceed 20 mA!
Otherwise the current signal can drop, the measuring cell
can become damaged and this can cause dangerous over
metering in a control system!
In order to avoid this, install a monitoring system, which turns
off the remaining peracetic acid control and raises an alarm.
The monitoring system should not be automatically reset.
• Avoid installations that can cause air bubbles in the sample
water! Air bubbles clinging to the measuring cell diaphragm
can cause the measured value to be too small and thus lead
to dangerous over metering in a control system!
• After commissioning, the measuring cell should always be
stored in a moist environment.
After successful installation, you can switch on the measuring equip-
ment. After that you need to wait for the designated running-in time
for the measuring cell.
8.1

Running-in time

In order to achieve a stable reading, the measuring cell requires the
following running-in times:
initial commissioning:
after changing the diaphragm:
re-commissioning:
If air between the gauze and the diaphragm was not expelled (see
section 6) then, naturally, running-in times will be longer!
Commissioning
approx. 1-2 hours
approx. 1 hour
approx. 1-2 hours
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