INSTRUCTION MANUAL
Sahara Moisture Transmitter
Reference 085
Rev 2
Page 14 of 14
06/06/2013
VII. Helpful Information (continued)
b. Conductive Particulates (i.e. metallic, carbon, or conductive liquid droplets)
i. Since the probe reading is inversely proportional to the impendance, a
decrease in resistance will cause an increase in meter reading. Thus,
conductive particles across the sensor leads or on the sensor surface
can lead to a reduced impendance with a subsequently erroneous high
dew point. The most common particulates of this type are carbon (from
furnaces), iron scale (from pipe walls), and glycol droplets (from glycol
dehydrators).
ii. On rare occasion, the conductive contaminant may cause a low
resistance to occur from ground to one of the sensor leads. In this
instance, a reduction in meter reading will occur. This phenomena is
readily observed, since it not only influences the reading of the
contaminated sensor, but will also harmfully influence all other sensors
connected to the same readout. Henderson Engineering Co.
recommends return of the probe to the factory for cleaning.
c. Corrosive Particulates (i.e. sodium chloride, sodium hydroxide, etc.)
i. The active sensor element is constructed of aluminum. Any material that
will corrode aluminum will harmfully affect the operation of the sensor.
The combination of this particulate and water will lead to pitting or severe
corrosion of the element. In such instances, the sensor cannot be
cleaned or repaired.
E. Aluminum Oxide Probe Maintenance
1. If for some reason an electrically conductive liquid or any other temporary
contaminant is on the aluminum oxide sensor, the ambient moisture will be
incorrect. Henderson Engineering Co. recommends return of the probe to the
factory for analysis and cleaning.
2. For optimum performance, Henderson Engineering Co. recommends having
the probe calibrated annually.
Summary of Contents for Sahara-Pak HC-1260
Page 40: ...INSTRUCTION MANUAL Model HC Reference 219 Rev 2 Page 40 of 46 06 20 2013 SECTION 4 WARRANTY...
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Page 87: ...INSTRUCTION MANUAL Model HC Reference 219 Rev 2 Page 45 of 46 06 20 2013 SECTION 7 CUT SHEETS...
Page 128: ...INSTRUCTION MANUAL Model HC Reference 219 Rev 2 Page 46 of 46 06 20 2013 SECTION 8 DRAWINGS...
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