Part 2 Installation
2.6
Installing the Oxygen Sensor using H3 Flow Through Sensor Housing
The OMD-501D can accept either a TO2-1x or TO2-2x (CO2 Applications) trace oxygen sensor. For proper
selection with your application, please view our online application guide or contact your local sales rep.
Prior to installing the sensor, it is important to make sure that the analyzer gas lines are hooked up and the
unit is ready to purge with a zero gas. Connect the zero gas line and set your flow between 0.5 - 4.0 SCFH.
To Install the Sensor:
- Remove the cell holder cap by unscrewing the stainless steel collar.
- Lift up on the top of the sensor housing and set to the side.
- Inspect O’ring for cracking, replace if necessary.
Always lube your Orings!
- Remove the sensor from its box. With scissors, open nitrogen purged packaging
and remove the sensor.
- Visually inspect sensor for damage, if damaged notify the factory immediately.
- Remove the shorting pins across the back of the sensor board contacts.
- Place the sensor inside the housing with the metal screen mesh facing down and
the circuit board contacts facing up.
- Return upper portion of the sensor housing to the stainless steel bottom. Tighten
collar. Hand tight is acceptable to create an airtight seal.
- Immediately start purge of zero gas.
- If the analyzer has not been calibrating, refer to section 4.1 for more information.
** Sensor should be exposed to ambient air for no more than 2 minutes. Extended periods of exposure can
damage the low end sensitivity and response time.
CAUTION: Prior to installing the oxygen sensor. Read section 4.1
on performing a span calibration.
H3 Sensor Housing
Top portion of sensor housing
Stainless Steel Collar
Bottom portion of sensor housing
