GREEN INSTRUMENTS G3600, Руководство пользователя, Страница: 19 / 28

G
3600
/G
3601
Inert Gas Sampling Boards
Ver.2.3 – Revision April 2022
19
4 Commissioning
Before starting the system for the first time after completing the installation, please check
the installation of the system.
4.1 Installation Checks of the Sampling Board
•
Check that the span and zero calibration gases are connected, and that all connec-
tions are secured and not leaking. A leaking connection will result in loss of calibration
gas and may result in poor calibration.
•
Check that the sample gases are connected, and that the connections are secured
and not leaking. Sample gas connections should be as close to the process as possible,
preferably made from 6 mm stainless piping in order to reduce the dead volume in the
sampling system. If the sample gas is heavily contaminated with particles, a pre-filter
should be installed. The sample gas has to be taken from a suitable location representa-
tive for the gas to be tested.
4.2 Commissioning of the Analyzer
Check the connection and settings of the analyzer by following the instructions in sec-
tions 3 to 5 in the oxygen analyzer manual. When working with a double sampling board,
this step needs to be carried out for each analyzer separately.
4.3 Start of the System
•
Start the analyzer following the instructions in chapter 5 in the analyzer manual.
•
Fill the bubble glass with clean (preferably distilled) water to the water line marked
on the glass.
•
Introduce sample gas to a sample port and turn the selector valve to the selected
sample port (1-3).
•
Open the flow control valve slowly until bubbles are noted. Open the flow control
valve until there is a steady stream of bubbles from both the by-pass and sample return
pipes inside the bubble glass. The longest pipe is for by-passing of sample gas against the
water static pressure to secure a sufficient flow rate and constant sample pressure at the
sensor. The short pipe is the return of sample gas from the sensor(s). Increased gas flow
indicated by more bubbles from both pipes will reduce the sampling delay time. Howev-