Procedure 5.3 - Troubleshooting Hand Held Heart Rate - Precor 9.33 Manual

9.33, 9.35 240V Treadmill

Procedure 5.3 - Troubleshooting Hand Held Heart Rate

Circuit Description
The hand held heart rate system is actually a dual system, that is, it can accept a heart rate
signal from either the hand held heart rate contacts on the unit's handlebar or from a Polar heart
rate chest strap transmitter. The PCA is configured for hand held priority. That is, if both a chest
strap and hand heart rate signal are being received, the system will accept the hand held signal
and ignore the chest strap signal. If a hand held signal is not being received, the system will
accept the chest strap signal.
Note:
There are four typical failure modes for the hand held/chest strap heart rate system. They are:
hand held is normal - no chest strap reading; no hand held reading - chest strap normal; no hand
held or chest strap reading or constant or intermittent readings when neither hand held or chest
strap are in use.
Diagram 5.5 - Hand held/chest strap heart rate PCA
43579-108 or higher
Heart Rate PCA
Normal hand held reading - No chest strap reading
1. Access the diagnostic program (Procedure 3.2). Advance to the heart rate display
portion of the diagnostic program. Verify that a chest strap signal is not being accepted
with either a Polar heart rate test transmitter or a known good chest strap transmitter. If
this reading is good, skip to step 3.
2. Using a known good Polar heart rate chest strap, verify that the heart rate operates
with the known good chest strap. If the known good Polar chest strap does corrects the
problem, replace the original chest strap transmitter.
3. If the above procedures did not correct the problem, replace the heart rate PCA.
J3
HR Output
5 Vdc
Gnd
J1
Lower Right
Upper Right
Upper Left
Lower Left
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