Instruction Manual StackGuard
32
10266E/1
5.2
Checking the zero and reference points
When working on parts of the system that are not insulated, it is imperative
that temperature-resistant gloves are worn!
The zero and reference point check is for ongoing quality assurance and should
be performed when the unit is warm!
Be sure to use the checking rod supplied for this particular instrument. Make
sure that the checking rod is in the photometer only for a short time, since the
heat in the measuring cell changes the checking rod value and may result in an
incorrect adjustment.
Action Display
(example)
Remarks
1.
Activate service
mode
* SENSORCHECK *
* *
→
Section 4.1.3
2.
n
* RECALIBR. *
* *
3.
p
check the adjust-
ment nominal
value.
Nominal value
must correspond
to the value on the
checking rod!
- Adjust. Nominal
-
7.52 PLA
If the nominal value does not
match the value on the
checking rod, contact your
service partner.
4.
p
- Reading <
0.0010
5.
Disconnect the sample supply from the
photometer.
6.
Check the glasses on the checking rod for
cleanliness. Clean them if dirty with a non-
fluffy cotton cloth.
7.
If a
zero air filter
is present:
Screw it in place of the inlet tube (A)
directly onto the measuring cell inlet.
If
no
zero air filter is present:
Remove the sample return line at position
(B) and close it with a temperature
resistant plug.
Zero and reference
point check
