WMA-5 Operation Manual V. 1.01 11 support@ppsystems.com
Optional Sensors for use with WMA-5
O
2
Sensor
An optional electrochemical O
2
sensor can be used with the WMA-5 for measurement of oxygen in
addition to CO
2
.
• Range: 0-100%
• Response Time: ≤ 15 seconds at 23 ± 2
o
C
• Linearity: ± 1.0% of full scale
The O
2
sensor is mounted into a manifold located inside the terminal block enclosure and is fitted in-line
to sample the incoming gas stream. Recalibration should not be necessary and based on our experience
with this sensor it should have a working life of approximately 4-5 years.
H
2
O Sensor
An optional solid state H
2
O sensor can be used with the WMA-5 for measurement of H
2
O in addition to
CO
2
.
• Range: 0-Dewpoint (mb)
• Accuracy: < 2% RH
The humidity sensor is mounted into a manifold located inside the terminal block enclosure and is fitted
in-line to sample the incoming gas stream. Readings are displayed and recorded in absolute vapor
pressure (mb). Recalibration of this sensor is not necessary.
Mechanical Specifications & Mounting
Instructions
The WMA-5 is very easy to mount. The rear of the enclosure has convenient markings showing where to
place mounting screws. All dimensions are in centimeters (cm).
System Power
The WMA-5 is supplied with its own power supply to allow operation from local mains power. The
specification of the power supply is as follows:
Input: 12 VDC, 1.5A or 100-240 VAC, 50-60 Hz, 0.6A (AC adapter included)
The WMA-5 can be powered by 12V if required via direct connection to the terminal block. It requires a
12V DC input at 1.5A. Connect the positive to +12V and the negative to GND. The terminal block is
clearly marked for ease of connection.
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