AMC AMC-1228, Инструкция по эксплуатации, Страница: 13 / 15

AMC-1228 Multidrop
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3. Using Span Adjust Trimmer adjust signal voltage to proportional calibration gas
concentration.
I.E. Full Scale = 10ppm NO2 =3VDC/Full Scale X Calibration Gas
Calibration Gas = 5ppm NO2 =3VDC/10ppm X 5ppm
= 1.5VDC
5.2.2 Alarm Adjustment
Alarm Adjustment can be made with the corresponding High or Low Trimmer.
Adjust the corresponding Alarm Voltage to the appropriate fraction of full-scale gas
concentration. Alarm Voltage can be measured from TB3(-) to Low test point and high test point.
(see Figure 4 for location).
I.E. Full Scale 10ppm =3VDC/Full Scale X alarm Trip Point
Alarm Trip Point 1ppm =3VDC/10ppm X 1ppm
=.3VDC
FIGURE 4: Span and alarm adjustment.
CAUTION:
Only qualified personnel should perform the actual calibration. Users are advised to
consult The Armstrong Monitoring Corporation as to the recommended calibration gas
concentration for the application, and any other questions.