Alpha Omega Instruments OXY-SEN Buku Petunjuk - Halaman 8
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Halaman CetakALPHA OMEGA INSTRUMENTS CORP.
OXY-SEN OXYGEN MONITOR
Routine Span Gas Calibration Checks
The OXY-SEN Oxygen Monitor has been calibrated at the factory prior to shipment. However,
due to the rigors of shipping, it is advisable to check the calibration of the OXY-SEN upon
receipt (see below). This can easily be accomplished by powering up the instrument and placing
the sensor in a source of fresh air. The reading on the meter should be approximately 20.9%. If
an adjustment needs to be made, use the span adjustment screw located on the side of the
instrument. The measurement error associated with the OXY-SEN is + 1% of full scale which
translates into + 1%. This specification does not differ if the optional 25% analog output is used.
The oxygen sensor used in the OXY-SEN is very stable and will provide exceptional
performance over long periods. It is advisable to check the calibration of any gas phase
instrument. Alpha Omega Instruments recommends checking the calibration of the OXY-SEN
every 2-3 months.
Calibration Gas
The oxygen sensor used in the OXY-SEN Oxygen Monitor has a linear output. As a result, it
can be calibrated using a source of fresh air, which contains 20.9 % O
expected to be over 20.9%, a calibration gas at or above the anticipated measurements may
improve calibration accuracy.
An optional calibration fixture (P/N OS-1CAL) is available to enable use of bottled calibration
gases.
Procedure for Checking Calibration
Insure that the sensor input is exposed to a source of fresh air, or to a flowing gas from a
calibration gas bottle (must have optional flow through gas housing). Insure that pressure
does not exceed 1.0 PSIG and flow does not exceed 0.5 to 1.0 liters/min when utilizing the
optional flow through gas housing. If the reading on the meter differs markedly from the
calibration source, an adjustment to the instrument should be made. To accomplish this,
locate the span calibration potentiometer located on the right side of the electronics
enclosure. With a small blade screw driver, adjust the front panel reading of the instrument
until it matches that of the calibration medium.
Zero Adjustment
No zero calibration is required.
SECTION 5.0
CALIBRATION PROCEDURES
5
Instruction Manual
. For gas measurement
2