Electronics International TC-1P - Manual (Page 14)

2. CHT Probe Installation Installation Instructions
2. CHT Probe Installation:
Most engines have a port just below the lower spark plug for the CHT probe. Replace your existing Primary
CHT probe with one of Electronics International’s CHT probes. It is important to install the same type of
CHT probe as was removed from the engine. A bayonet and screw-in type probe may be interchanged.
Your current CHT probe was installed in the hottest cylinder determined by extensive flight testing. If you
suspect your current probe was not installed on the correct cylinder or the probe type is incorrect, contact
your airframe service department for this information.
3. TIT Probe Installation:
Electronics International offers a variety of TIT probes. The following describes the steps for installing each
of these probes.
A. Hose Clamp EGT/TIT Probe - Remove the existing TIT probe and drill this hole out using a
13/64 inch drill bit. This will insure easy installation and removability of the probe. Insert the EGT
probe and tighten the hose clamp. As the hose clamp is heated and cooled it will become loose as it
conforms to the exhaust stack. After the first 10 hours of operation, retighten this clamp.
B. Screw-in TIT Probe - This probe has an adjustable depth so it can be adjusted for any application,
but it can only be adjusted once. Once the ferrule has been compressed, the probe depth cannot be
changed. Perform the following steps:
1. Remove your current TIT probe and check that your E.I. probe and compression fitting will fit
and work properly. E.I. offers three screw-in TIT probes (1/8" NPT, 1/4" NPT and 7/16" - 20).
2. Determine the correct depth the probe sheath should extend beyond the compression fitting.
Do this by checking it against your current TIT probe (1" is standard).
3. Set the compression fitting by tightening the cap into the body using a wrench.
4. Install your E.I. TIT probe into the exhaust stack and tighten.
4. EGT Probe Installation:
Look at each exhaust stack and determine the best location at which all of the EGT probes can be mounted at
the same distance down from the exhaust ports. The ideal location is 1 1/2", but ease of installation should
prevail. Drill a 13/64" diameter hole in each exhaust stack. Insert the probe and tighten the hose clamp. As
the hose clamp is heated and cooled, it will become loose as it conforms to the exhaust stack. After the first
10 hours of operation, each hose clamp should be retightened.
IMPORTANT NOTE: For Cessna 210’s or any aircraft using a slip joint in the exhaust system, install the
EGT probes ABOVE OR BELOW THE SLIP JOINT. Installing a EGT probe in the slip joint can damage
the probe.
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