AMI INSPECTOR pH
Maintenance
A-96.250.761 / 161017 35
6.5.2 Pre-test
Reference instrument: AMI INSPECTOR pH:
– Check certificate; reference instrument certificate not older
then one year.
– Check battery; Battery of the AMI INSPECTOR pH should
be completely charged. Remaining operating time on
display minimum 20 hours.
– Disable temperature compensation (set to “none”)
On-line instrument: Monitor AMI pH/Redox:
– Good order and condition; Flow cell free of particles,
Sensor surface free of deposits.
– Check message list; Review the message list in menu 1.3
and check for frequently alarms (as for example flow
alarms). If alarms occur frequently remove cause before
starting the procedure.
6.5.3 Connect instruments
The AMI Inspector pH sample inlet is equipped with a serto fitting
for stainless steel pipes. To connect the sample stream to the AMI
Inspector pH proceed according to chapter Serto Fitting Stainless
Steel, S. 32. The choice of sampling depends strongly on local con-
ditions on site. Possible sampling:
via Sample point,
via T-fitting or
as piggyback / downstream
NOTICE: Important for correct measurements are in any case:
• sample as near as possible to the process monitor,
• wait approx. 10 minutes, whilst measurement is running,
until measurement value and temperature are stabilized.
Example:
Sampling via
T-fitting
The reference instrument, AMI Inspector pH, is connected parallel
to the Monitor AMI pH-Redox by installing a T-Fitting at the sample
inlet tube and dividing the sample stream to each instrument.
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