7.1.1
Important information on GPP measuring probe
NOTICE
Observe the following information during commissioning of the GPP measuring probe
to avoid damage to the measuring system and to achieve stable measurements.
•
Check the filter surface visually for damage.
•
Warm the measuring probe up for about 30 minutes beforehand so that the tem‐
perature of the window and triple reflector is sufficient to prevent condensation on
the optical surfaces.
•
Gas can escape at the measuring probe during overpressure processes when the
1/4" plug is open or loose. Air is suctioned into the measuring probe during low-
pressure processes. The measured value in the chamber then drops depending on
the low-pressure in the process, possibly down to zero.
•
Do not damage the filter when inserting the measuring probe in the flange.
7.2
Tools required
•
Fork or ring spanner set
•
Optical alignment tool (not included in standard scope of delivery)
7.3
Material required
•
Optics cleaning wipes without detergent
•
Test tool kit for SPAN test (Part No.: 2019639)
7.4
Commissioning steps overview
Commissioning comprises two main steps:
1
Zero adjust:
The sender-receiver unit is prepared for operation with the measuring probe in an
atmosphere free from sample gas.
2
Installation and commissioning at the sampling point:
The purge air unit and the sender-receiver unit are put into operation with the
measuring probe. The control unit is then switched on and checked. This can then
be configured for individual requirements.
Prerequisites
•
Control unit is fitted and wired.
•
Potential equalization is connected to the control unit.
Table 10: Commissioning steps overview
Step
Procedure
Reference
1
Remove the transport safeguards.
see "Removing the transport safety devices
of the measuring probe", page 36
.
2
Fit the T-piece on the measuring probe (if
not already fitted at the factory).
see "Fitting the T-piece on the measuring
probe", page 37
3
Align the sender and receiver on the opti‐
cal axis.
see "Aligning transmitter and receiver opti‐
cally", page 37
.
4
Install the sender and receiver.
see "Fitting the sender and receiver on the
T-piece", page 38
.
5
Connect the sender and receiver with a
signal cable.
see "Connecting the sender and receiver",
page 39
COMMISSIONING
7
8008932/16YT/V4-0/2022-02 | SICK
O P E R A T I N G I N S T R U C T I O N S | GM901-02
35
Subject to change without notice
