MNA0010, Revision B October 2014
19
CAUTION:
The Model 7100P Portable analyzer features a heated
mini-Zirconia sensor. Do not attempt to access the sensor or
sensor control board until power has been removed from the unit
and you have allowed sufficient time for the heater to cool down,
about 5 minutes.
DANGER:
Electrical connections on the rear of the Model 7100P
Portable analyzer may have hazardous voltages present once power
has been applied to the unit. High voltages may be still remain for a
short time even after power has been disconnected from the
analyzer. Take care in observing standard electrical practices
when making electrical connections to the Model 7100P Portable
analyzer.
DANGER:
The model 7100P Portable analyzer is not rated intrinsically safe or explosion
proof. Be certain that all flammable and toxic gases are not present in the area where the
Model 7100P Portable analyzer will be installed.
CAUTION:
The model 7100P Portable analyzer housing is not rated waterproof. Do not
mount the analyzer or the sensor in an area where it may contact water or other liquid
elements.
❑
High Purity Welding [checking the shield gas]:
When high purity welds are made, a
shielding gas of nitrogen or argon is used to purge oxygen out of the tubes or pipes to be
welded together. To ensure the oxygen has been effectively purged out, the use of the
7100P oxygen analyzer can be easily used. Install the external sintered metal Prefilter to
make sure no partic
ulates [metal filings…] enter the sample line. Additionally, to speed up
the purging of the tubes to be welded, the use of a 3 way high flow bypass valve can be
used. See figure 19.
For welding exotic metals [titanium, hastelloy,…] it may be desirable to monitor and
!
Figure 19
High Purity
Welding
Neutronics Inc.
