Envent 330S-Ex, Руководство пользователя

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Envent Engineering Ltd. Page 26 Revision 1
H
2
S Range Aperture Strip Envent PN
50 ppb to 1 ppm ppb style 330110
1 ppm to 16 ppm None (1/4" (0.635 cm) fixed
aperture size)
N/A
16 ppm to 30 ppm 1/16" (0.1588 cm) 330103
30 ppm to 50 ppm 1/32" (0.080 cm) 330102
50 ppm to 100 ppm Pin Holes 330100
100 ppm to 500 ppm Laser Dot 330109
Over 500 ppm Addition of a dilution panel. Consult Factory.
Table 3. Aperture Strips & Ranges
Aperture strips can be changed to accommodate for a different range application.
Refer to the table shown above to select the best option on the new
concentration application. Contact Envent Engineering Ltd to purchase an
aperture strip.
Remember: gain and span values on analog outputs will have to change based
on new range application. Please re-calibrate analyzer. Refer to "H
2
S Gas
Calibration" on page 32.
The adhesive used to glue the aperture strip in its place is RTV108 Translucent
Adhesive. RTV102, RTV103, and RTV109 could also be used.
Humidifier Unit
For the H
2
S to adhere to the surface of the H
2
S Sensing tape, it needs to be
humidified. The humidifier unit helps having constant moisture content in the
sample which increases the chemical reaction on the H
2
S Sensing tape. Envent
Engineering Ltd offers a unique design of humidifiers meant to meet the
requirements for humidification of the sample before it gets into contact with the
H
2
S sensing tape; refer to Figure 13 .