69-0896—1
4
C7089 OUTDOOR SENSOR
Home and Building Control
Honeywell Limited-Honeywell Limitée
740 Ellesmere Road
Scarborough, Ontario
M1P 2V9
69-0896—1 J.H. Rev. 6-95 Printed in Mexico
CHECKOUT
Allow the C7089 Outdoor Sensor to soak in the outdoor air
for a minimum of five minutes before taking a reading.
With an accurate thermometer (
±
1
°
F [0.5
°
C]), measure the
temperature at the sensor location, allowing time for the
thermometer to stabilize before reading. Press the CHECK
key on the PC8900 until the display shows OUT followed
by the temperature reading. See Fig. 4. The PC8900
reading should match the reading taken outdoors.
To verify the resistance of the sensor, remove one wire
from one of the C7089 wiring terminals. Use an ohmmeter
to measure the resistance across the sensor. Then verify
sensor accuracy with the temperature/resistance curve of
Fig. 3.
CALIBRATION
The C7089 Outdoor Sensor is calibrated in the factory and
cannot be recalibrated in the field.
CHECK
SYSTEM
PC8900
M7515
Fig. 4. Outdoor temperature display on the PC8900.
Home and Building Control
Honeywell Inc.
1985 Douglas Drive
Golden Valley, MN 55422
