MSA 47K Series User Manual

GB
MAINTENANCE AND SERVICE MSA
16 Series 47K Gas Detector [SIL 2]
5.1.1 Zero Calibration
 Apply zero gas to the sensor using the appropriate calibration adapter.
 Wait for approximately 2 minutes or until the sensor reading has stabilised.
 Adjust the controller until the correct reading is obtained.
Gas flow rate : 1.0 l/min
Zero gas : synthetic air or component-free ambient air
5.1.2 Span Calibration
See also Section 5.3.
 Apply span calibration gas to the sensor using the appropriate calibration
adapter.
 After the reading has stabilised adjust the controller until the correct reading is
obtained.
 Remove calibration adapter.
Gas flow rate : 1.0 l/min
Stabilisation time : depending on gas type between 2 and 4 min
Caution
Use span gas with a concentration of approximately 50% of the
measuring range. In no case should the span gas concentration be
less than 25% of the full scale value of the measuring range.
If possible, the span gas [the gas used to calibrate the sensor] and the
measurement gas [the gas to be monitored] should be identical. If this
is not the case and a reference gas is used, the response factor of the
gas used must be known.
5.1.3 Calibration with Accessories
Calibration of Gas detectors used with duct mount flange, flow through adapter or
weather protection cap should be carried out as described above using the
particular gas inlets of the accessories.
Gas flow rate : 1.0 l/m

MSA 47K Series Specifications

General

Brand	MSA
Model	47K Series
Category	Gas Detectors
Language	English