Henny Penny HHC-980 Technical Manual page 25

3-3. HUMIDITY SENSOR
CALIBRATION AND
REPLACEMENT
(Continued)
Figure 3-6
904
6. Using the hidden buttons, (Figure 3-5), enter code of
11221122. (Hidden buttons 1 through 5 left to right)
Figure 3-5
7. Press to step through menu to step 13.
8. Insert the two prongs of the calibration board marked 20%
into the humidity sensor. Figure 3-6.
9. Press and hold the hidden button
Release both buttons. 20% should then show in display.
10. Reverse calibration board and insert the two prongs marked
80% into humidity sensor.
11. Push and hold the hidden button
Release both buttons. 80% should then show in display.
12. Push the (P) button to step 14 on models 983 & 980, or to
step 16 on models 993, 990, 996, & 998.
13. Find the offset number on the mounting plate of the humidity
sensor.
When changing the control board on units with serial number
IV178JB and below, no offset will be found. Leave offset at 0.
14. Push and hold the hidden button "2", then push the UP or
DOWN arrows to enter the offset number.
12. Press and hold
13. Reinstall two pronged sensor into humidity sensor.
14. Reinstall silver cap and sensor cover, and unit is now ready
for use.
Model HHC-980/983
, then press
then press
to exit TECH mode.
.
.
3-3