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WITT-GASETECHNIK GmbH & Co KG
Salinger Feld 4-8
: +49 (0)2302 89010 www.wittgas.com
Gas safety & process technology
D-58454 Witten,
Germany
Fax: +49 (0)2302 89013 [email protected]
11
Maintenance, care and repair assistance
The OXYBABY
®
will operate reliably for many years with a low maintenance and care requirement
if you observe the following points:
use flawless filters only
Contaminated filters can inhibit the measuring gas flow rate through the measuring cell or it
may fail to sufficiently filter foreign bodies out of the measuring gas.
check the measuring gas passage through the needle occasionally.
If it is clogged up, the measuring gas can no longer access the measuring cell. This will result
in measuring errors. Clogged up or bent needles must be replaced immediately with new ones.
clean the casing of the OXYBABY
®
using a dry or slightly moist cloth only.
Do not use any cleansing agents. Never clean the device with water or other cleaning fluids.
avoid subjecting the casing to any strong vibrations.
calibrate the OXYBABY
®
regularly, for example before starting any measurements.
11.1
Needle or filter clogged up
The OXYBABY
®
needle or filter are clogged up or the device is faulty:
-
when "needle blocked" is shown on the display.
-
where there is no difference in concentration levels between a measurement on packaging and a
measurement of ambient air.
Last measurement
06.04.2009 09:22:28
needle blocked
S
alami
A. Meier
Production line 12
Test in "sample hold" operation mode:
perform measurement on packaging (see.7.3)
Reference measurement using zero gas:
remove filter and needle of OXYBABY
®
(see below and Fig. 2)
perform measurement with zero gas:
use a suitable zero gas cylinder – for each gas (see Technical data). Install a pressure re-
gulating valve onto the zero gas cylinder, then connect a protective sleeve or a loose pie-
ce of hose to the outlet side on the pressure regulating valve.
allow the gas to flow freely at as low a pressure and flow rate as possible through the ho-
se to the environment.
after the pressure regulating valve/hose system has been sufficiently purged (to displace
the ambient air), hold the OXYBABY
®
needle in the hose so that the flow of gas can be
sucked in. Then start the measurement with
.
Insert the needle into the hose far enough to ensure that gas does not accumulate
in the hose and that pressure is not built up.
09051301
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