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RUSKA 7750i
Users Manual
4. Select the Primary sensor by pressing the Sensor [F6] key until the words Ps Primary
5. Select Zero [F1]. Do NOT press the Calibrate button.
6. Select the Mechanical Zero [F1] key.
7. Referring to Figure 6-8, slightly loosen the Allen screw on the back of the sensor
6-10
or Qc Primary depending on the desired sensor is displayed, above the calibration
coefficients.
bracket, making sure to maintain a snug fit on the screw. Using the T-shaped
Photocell Centering Tool (part number 7750-111) 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.
Figure 6-6. Mechanical Zeroing Screen
Figure 6-5. ZeroSet Screen
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