Page 228 - Womens Pavilion
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“Oil-Less” Scroll Medical Air
Appendix B: Dew Point Transmitter
B.1 General Information B.2 Introduction
CAUTION: This manual is designed to serve as The dew point transmitter is a continuous, on-line
the operation and maintenance guide for your instrument that measures the absolute moisture
Dew Point Transmitter, if equipped. The contents content in the fi nal air line. The transmitter
of this manual should be carefully read BEFORE measures dew point with excellent long term
attempting any phase of operation or maintenance. stability. The Advanced Ceramic Moisture sensor
Failure to follow the operating and maintenance is durable and has been designed for ruggedness
procedures of the instruction manual could result and simplicity. The transmitter is fully calibrated at
in personal injury or property damage. the factory prior to shipment.
WARNING: B.3 Specifi cations
Before starting any installation, 1. Dew point Temperature: -100° to 20°C (-148°
maintenance or service procedure, to 68°F)
disconnect ALL power to the system to
prevent electrical shock. 2. Operating Temperature: 0° to 60°c (32° to
140°F)
Before making or breaking any medical 3. Dew point accuracy: ±2°C (±3.6°F)
gas line connections, make sure the 4. Air Consumption: 0.75 LPM (1.6 SCFH)
system is depressurized in order to avoid
personal injury. B.3.1 Output
Before removing the dew point transmitter, Analog output: 4 - 20 mA
verify that the source of line pressure has
been closed and the line pressure reduced B.3.2 General
to atmospheric pressure.
1. Operation Voltage: 12 - 28 VDC
An alarm condition on dew point 2. Probe material: Stainless Steel (316)
indicates a dew point level exceeding the 3. Sensor protection: Ceramic
maximum set point, or a faulty dew point
transmitter. Immediate action should be B.4 Operation
taken to reduce the possibility of high
dew point in the Medical Air line. Although the correct operation of the transmitter
is not sample fl ow dependent, it is important that
If the dew point transmitter fl owmeter fl ow velocity through the sample source to the
becomes clogged, dew point readings sample block is high enough to avoid long lead
may be inaccurate, allowing moisture to time lags in response to changes in moisture at the
accumulate undetected. sample source.
B-1 4107 9000 69.06
