Appendix A: General Maintenance
All combustion analyzers use consumable items such filters and probes. These
items are user serviceable and can be taken care of by the operator.
The consumable items that will require operator attention are the water trap / fil-
ter assembly, flue probe, pump protection filter, and ambient temperature probe.
The recommended maintenance schedule for your analyzer is as follows:
Maintenance Performed
Frequency
Water trap Check
Once per week (Once per day for analyzers
Filter Check
that see heavy use or are used in oil fired
applications)
Pump Operation Check
Once per month (More often for analyzers
Flue Probe Integrity Check
that see heavy use or are used in oil fired
Thermocouple Probe Check
applications)
Water Trap Check
Visually check the water trap for:
1. Cracks in the bowl.
2. Broken ears on the bowl where the lid locks on.
3. Broken ears on the lid.
4. Worn out o-ring on the lid.
5. Loose connection to the flue probe tubing.
Filter Check
Signs of dirty or water saturated filters are a slow pump, flow error displayed
when the flue probe is connected, and measurements that take longer than nor-
mal.
TPI analyzers use three filters to protect the pump and sensors. The first filter to
check is the A763 mini pump protection filter. (see picture below)
Strain Relief Spring
Inspection Window
A763 Pump Protection Filter
Look in the inspection window to check the filter. When the filter material
becomes dark, pull the black nose cone out of the tubing and replace the ball fil-
ter inside.
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CALIBRATION & SERVICE
It is recommended that your analyzer be calibrated every 12 months. When
calibration is due the analyzer will remind you by flashing “CAL DUE Err” at
start up and then return to normal operation. Please consult Test Products
International for further details or send your analyzer to the address below
for service.
TPI / Attn. Repair
9615 SW Allen Blvd. Suite 104
Beaverton, OR 97005
The following are consumable parts for the instrument:
In-Line Filter Element (pkg of 5)
User Replaceable
A794F
Mini Pump Protection Filter Assem. User Replaceable
A763
**Oxygen Sensor
User / Factory Replaceable
A761
**Carbon Monoxide Sensor
User / Factory Replaceable
A760
**Sensor replacement requires calibration gas.
WARRANTY
Your TPI 708 Flue Gas Analyzer is guaranteed free from defects in materials
and workmanship for 3 Years from the date of purchase. This guarantee does
not affect your statuary rights. For additional information please refer to the
included warranty card or contact TPI at 800-368-5719.
To obtain warranty performance or maintenance on your analyzer: - Include
with the product your name, address, phone number, written description of
the problem and proof of purchase date. Carefully package and return to:
TPI / Attn. Repair
9615 SW Allen Blvd. Suite 104
Beaverton, OR 97005
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