System Testing and Verification
Adjusting sheet guide and air wipe heat levels
3.
Terminate the two wires to pins 1 and 5. Terminating the wires
connects all the heater strips in parallel and powers them on.
!
CAUTION
:
Terminate the wires only as instructed here
(to pins 1 and 5).
4.
Repeat steps 1 – 3 for the other head.
5.
Check the results of the additional heating provided by the heaters
by observing at the console the offsheet air-gap temperatures in the
single-point mode.
!
CAUTION
:
Be sure that the temperature is noted while
the head is offsheet
6.
Adjust the setpoints of the air wipe heaters if necessary. Use the
controllers on top of the ECUs to make these adjustments, as
described in the next subsection.
4.5.2. Adjusting the setpoint of air wipe heaters
The air wipe heater in the ECU of each head controls the temperature of
the air that heats the sensor windows and sheet guide. The air wipe heater
is controlled by the controller on top of the ECU, which receives feedback
from the thermistor within the air gap sensor.
For each head, the setpoint for the air wipe heater determines the heat
level produced by the heater. The setpoint is set by Honeywell before the
Precision Platform is shipped. Under most conditions, the setpoint will
not require readjustment. Under some site conditions, however, it may be
necessary to change the setpoint (for example, where there are extreme
variations in temperature).
The setpoint for each sheet guide is controlled by the controller on top of
the ECU. The controller has settings numbered 1 – 10. To change the
setpoint:
P/N 6510020208
10/4/07
4-17
Summary of Contents for 4022
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