E-1
Z MED Medical Air System
4107 9022 67.00
E.1 General Information
CAUTION:
This manual is designed to serve as
the operation and maintenance guide for your
Dewpoint Transmitter. The contents of this man-
ual should be carefully read BEFORE attempting
any phase of operation or maintenance. Failure
to follow the operating and maintenance proce-
dures of the instruction manual could result in
personal injury or property damage.
E.2 Introduction
The dewpoint transmitter is a continuous, on-line
instrument that measures the absolute moisture
content in the final air line. The transmitter
measures dewpoint with excellent long term
stability. The Advanced Ceramic Moisture sensor
is durable and has been designed for ruggedness
and simplicity. The transmitter is fully calibrated
at the factory prior to shipment.
E.3 Specifications
1. Dewpoint Temperature: -100
°
to 20
°
C (-148
°
to 68
°
F)
2. Operating Temperature: 0
°
to 60
°
C (32
°
to
140
°
F)
3. Dewpoint accuracy: ±2
°
C (±3.6
°
F)
4. Air Consumption: 0.75 LPM (1.6 SCFH)
E.3.1 Output
1. Analog output: 4 - 20 mA.
E.3.2 General
1. Operation Voltage: 12 - 28 VDC
2. Probe material: Stainless Steel (316)
3. Sensor protection: Ceramic
E.4 Operation
Although the correct operation of the transmit-
ter is not sample flow dependent, it is important
that flow velocity through the sample source to
the sample block is high enough to avoid long
lead time lags in response to changes in mois-
ture at the sample source. A flowmeter has been
installed and set at 1.0 - 2.0 SCFH to ensure
proper flow velocity. This flowmeter should be
checked weekly to see if it has any blockages.
Appendix E - Dewpoint Transmitter
WARNING!
Before starting any installation,
maintenance or service procedure,
disconnect ALL power to the system to
prevent electrical shock.
Before making or breaking any medical
gas line connections, make sure the
system is depressurized in order to avoid
personal injury.
Before removing the dewpoint
transmitter, verify that the source of
line pressure has been closed and the
line pressure reduced to atmospheric
pressure.
An alarm condition on dewpoint
indicates a dewpoint level exceeding the
maximum setpoint, or a faulty dew point
transmitter. Immediate action should be
taken to reduce the possibility of high
dewpoint in the Medical Air line.
If the dewpoint transmitter flowmeter
becomes clogged, dewpoint readings
may be inaccurate, allowing moisture to
accumulate undetected.
