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7 Maintaining the product
7
Maintaining the product
7.1.
Cleaning the measuring instrument
> If the housing of the measuring instrument is dirty, clean it with
a damp cloth. Do not use any aggressive cleaning agents or
solvents! Mild household cleaning agents and soap suds may
be used.
7.2.
Regular calibration
Leakage measuring instruments must be calibrated once a year in
accordance with DVGW guideline G5952. Calibration is performed
by Testo Customer Services or a service centre authorised by
testo.
7.3.
Replacing the gas bladder
The gas bladder for the feeding unit must be replaced every 5
years (production date stated on barcode sticker on the case). It is
replaced by Testo Customer Service or a service centre authorized
by Testo.
Identifying the production date
Barcode sticker 1
1 Year of production (example: 5 stands for the year 2015)
2 Month of production (example: 04 stands for the month of April)
74
After replacing the gas bladder, flushing is required (fill and
empty the feeding unit once).
Barcode sticker 2
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