Checking the Gain Adjusting the Gain 1. Press and hold the LIGHT/INC and MODE switches until "CHEC" is flashing on the meter. Before adjusting the gain perform the following steps: 1. Confirm the suspension oil and nitrogen charges are at the levels specified in the shop manual. 2. Press and hold the LIGHT/INC switch until "ALL0" is flashing on the display. "A.FUL" may also be displayed. 2. Weigh the empty truck and then calibrate the payload meter. Do both in succesion to ensure the weights are nearly identical. 3. Weigh at least 10 different loads to get an accurate deviation from actual scale weight and the pay- load calculation from the payload meter.
Com- plete the gain adjustment worksheet at the end of this module. The worksheet is an accurate way to calculate the necessary gain adjustment. 3. Press the LIGHT/INC switch14 times. The number displayed will be the current G t gain. Press MODE twice to return to normal operation. Adjustment Procedure: 1. Ensure the PLM is in normal operating mode. 2. Adjust the gain potentiometer on the side of the meter. Right to decrease, left to increase. 3. Press and hold the LIGHT/INC and MODE switches until "CHEC" is flashing on the meter. 4. Press and hold the LIGHT/INC switch until "ALL0" is flashing on the display. "A.FUL" may also be displayed. 5. Press the LIGHT/INC switch14 times.
The number displayed will be the current G t gain. This is not a "live" reading. Any time the gain is changed, this cycle must be repeated to view the new change. 6. Press MODE once and "CHEC" will flash on the display. 7. Press MODE once and the meter will return to normal operation. M20-10 Payload Meter II M20007.1 03/02