68
8014084/ZWT7/V3-1/2020-06 | SICK
O P E R A T I N G I N S T R U C T I O N S | TRANSIC111LP
Subject to change without notice
6
ADJUSTMENT
6.1.2.3
Adjusting gas flow
1
Open the gas cylinder valve with care to avoid pressure surges.
2
Completely open the flowmeter.
3
Slowly increase the pressure setting of the controller until the gas flow can be detected
with the rotameter
4
Use the flowmeter to adjust the volume flow to the desired value.
5
Pay attention to the volume flow for optimum adjustment precision.
For further information on adjustment precision and volume flow,
adjustment in the process”, page 67
.
6
for adjustment without flowmeter. Information on the relation
between span gas volume flow and span gas pressure of the optional test gas inlet can
be found there.
0511-052
Fig. 34: Volume flow against pressure, Swagelok SS-CHSM2-KZ-25 non-return valve
6.1.3
Information on calibration gases
●
Factory calibration: Mixtures of dry N
2
and O
2
.
●
Humidity / CO
2
concentration of calibration gases: 0%.
●
Gases recommend for adjustment: Nitrogen gas mixtures
●
A gas flow rate of about 5 l/min is adequate for TRANSIC111LP calibration and adjust-
ment. Shorter response times during calibration and adjustment require a higher volume
flow. The higher the gas volume, the higher the gas pressure. Select an adequate tubing
size for the escaping gas.
Pressure (bar)
Volume flow (l/min)
NOTICE:
Allow enough time for the gas concentration to stabilize when doing calibrations/
adjustments.
