sewerin EX-TEC Combi, Руководство по эксплуатации

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5 Testing / maintenance
5.1 Function testing, testing display accuracy, maintenance
Please consider the necessary and prescribed instruments con-
trol according to:
EN 50073
EN 45544-4
BGI 518 (T023)
BGI 836 (T021)/Applicable only in Germany
DVGW worksheet G 465-4/Applicable only in Germany
Testing must also cover accessories used. Tests carried out and
other activities must be documented and the documentation re-
tained for at least one year. The instrument tests required and
prescribed by DVGW G 465-4 (Technical Communications, re-
ference) are divided into the following sections:
What ? Who ? When ?
function testing user prior to start working
testing display accu-
racy (adjustment)
specialist or special-
ist company
daily to half-yearly
servicing
(maintenance, any
repairs required)
SEWERIN,
specialist or author-
ised company
annual;
on defective instru-
ments
Function testing
This is the simplest form of instrument test, which must be car-
ried out by the user before starting work. It covers the following
items:
external condition including probe systems
function-testing the controls
battery charge
inspecting the pump and suction inlet
pump function
zero point
display of test gas feeding
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