Download DIGITAL PRESSURE CONTROLLER

CAUTION: The DPC should only be opened by qualified electrical/mechanical service
technicians. Lethal voltages are present and exposed in the power supply and
display.
1. Identify which dual range sensor requires mechanical zeroing.
2. Remove the DPC’s top cover.
3. Locate and remove the plastic zeroing plug located in the side of the sensor oven
assembly.
4. Enter the Zeroing screen by selecting MENU | CALIBRATE.
5. Select the Primary sensor by pressing the Sensor [F6] key until the words Primary
is displayed above the calibration coefficients.
6. Select Zero [F1]. Do NOT press the Calibrate button.
7. Select the Mechanical Zero [F1] key.
8. Referring to Figure 6-5, slightly loosen the Allen screw on the back of the sensor
bracket, making sure to maintain a snug fit on the screw. Using the T-shaped
Photocell Centering Tool (RIC # 7250sys-111), adjust the photocells by placing
the tool in the hole in the back of the sensor and turning the tool slightly. The
screen will show a number of horizontal lines. The top yellow bar represents the
current zero setting. The bottom portion of the bar has a green bar in the center
and two red bars on either end. If the top yellow bar is over the red bar, then
mechanical zeroing is required. If the yellow bar is over the green bar, then no
adjustment is required.
MAINTENANCE
6-14