PortaSens II
Gas Detector
C16 Leak Detector
O & M Manual
Rev. G, 11/07
- 18 -
SENSOR MODULE EXCHANGE
The versatility of the
PortaSens II
leak detector stems from its ability to use a variety of
sensor modules. These interchangeable modules allow one instrument to measure a wide
variety of gases with extended range capabilities as described in the Introduction section.
Exchanging one sensor module for another is a simple procedure. On the back of the
instrument are two stainless steel thumb screws which hold the flow manifold in place. Loosen
these two screws and remove the manifold lid. The installed sensor is a black cylinder with white
membrane in the cavity recess. To remove, simply grab the sides of the sensor module and pull
it straight back. The sensor is held in place with a miniature connector for easy removal.
To insert a new sensor module, place the module connector first into the recess and
rotate as needed until the module key lines up with the guide on the bottom of the recess. The
sensor module can then be pressed in place, fully engaging the connector. When fully inserted,
the face of the sensor module will be flush with the outer surface of the cavity.
Replace the manifold lid and tighten the thumb screws securely (hand tight is sufficient).
After a module change, verify the flow through the sampling wand using the flowmeter supplied
with the unit. See Figure 4 on Page 19.
The detector can be on or off during a sensor module change. If the power is on during a
change, the display will indicate “SENSOR MISSING” when the sensor module is removed.
When the module is replace or a new one is inserted, the display will display a “LOADING”
message, indicating that sensor module data is being transferred from the sensor module into the
detector.
NOTE:
Sensors can take up to 12 hours to stabilize (bias) if not previously parked in the
sensor keeper or installed in the sensor chamber in the PortaSens II.
