MSA 47K Series, Руководство по эксплуатации

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ACCESSORIES MSA
28
Series 47K Gas Detector [SIL 2]
6.6.2 Operation
Calibration procedure can be carried out as described in chapter 5.1 of this
manual.
Note: To compensate for possible deviations during measurement of flammable
gases a calibration factor of 1.05 shall be applied when using the CalGard for
remote calibration.
Note: When using the CalGard for a remote calibration, the response time of the
system increases depending on the length of the test gas tubes used. If the
calibration is done automatically via controller, set the calibration setup with
sufficiently long countdown times for zero gas and calibration gas.
Example: When using a 10 metre long tube with an internal diameter of 5 mm
and applying a gas flow of 1 litre/min, the test gas takes a minimum of 20 sec to
reach the CalGard. For safe flushing of CalGard, an additional 10 seconds has to
be added to this calculation.
Note: If the CalGard is being used with a control system (i.e. SUPREMA), please
ensure the manual for the controller has been read and understood.
Note: The pressure in the test gas tube increases with rising test gas flow rates.
A flow rate of 1500 ml/min results in a pressure up to 600 hPa. This has to be
considered if a flow meter is used which is affected by the media pressure.
Material:
Stainless steel. 316
Dimensions: 60 x 122 [mm] dia. x height
Weight 0,6 kg
Working temperature: -30 °C to +70 °C
Storage temperature: -30 °C to +70 °C
Maximum wind speed: up to 6 m/s
Applicable test gases: H
2
, CH
4
, C
3
H
8
in air (approval of other gases
by MSA on request)
Recommended flow rate: 1.0 l / min
Minimum flow rate: 0,8 l / min
Maximum flow rate: 1.5 l / min
Response times: CH
4
t
50
≤ 15 s, t
90
≤ 40 s
C
3
H
8
t
50
≤ 20 s, t
90
≤ 55 s
For Part-No. of CalGard refer to Section 8.5 of this manual.
For mechanical installations of CalGard refer to Section 9.7 of this manual.