Rae MiniRAE Plus PGM-76, Руководство по эксплуатации и обслуживанию

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SECTION 4 PROGRAMMING IN HYGIENE MODE
4 - 23
1) Direct reading of a specific gas in ppm:
step 1: Obtain the calibration factor of a given organic
vapor. For example, benzene has a calibration factor of
0.57 relative to the standard 100 ppm isobutylene gas.
step 2: Multiply the standard calibration gas value ( such as
100 ppm of isobutylene) by the calibration factor to obtain a
compensated calibration standard value for the given gas, i.e.
cal factor x standard value = compensated value
( 0.57 x 100 ppm
= 57 ppm for benzene )
step 3: Enter the compensated calibration standard value,
instead of the actual calibration standard value in step 3 of
section 4.7.2. For example, enter 57 ppm instead of 100
ppm in step 3. Continue to finish gas calibration using the
standard calibration gas ( 100 ppm isobutylene ).
After the calibration is completed, the unit will give direct
reading in ppm when exposed to a specific gas. In this
example, the instrument will display 100 ppm when exposed
to 100 ppm benzene gas.
2) Manual conversion of readings for a specific gas:
step 1: Calibrate the instrument using standard calibration
gas as described in sections 4.7.2 - 4.7.3.
step 2: Obtain the calibration factor of a given organic
vapor (see the list in Appendix C ). For example, benzene
has a calibration factor of 0.57.