Electronic Modular Control Panel II (EMCP II) For MUI Engines Caterpillar

OP8 is the option for programming the calibration value of the voltmeter and ammeter. When the GSC or the AC transformer box (ATB) is replaced, the calibration values, written on the ATB bar code sticker, must be programmed into the GSC in order to ensure accurate voltage values and accurate current values.

There are five transformers in the ATB that the GSC monitors for information on voltage and current. Each transformer has individual characteristics that affect the voltage and current measurements by the GSC. At the factory, these characteristics are measured, assigned a calibration value and recorded on the bar code sticker which is located on the lower left side of the ATB. When the generator set is assembled at the factory, the calibration values on the bar code sticker are programmed into the GSC. The calibration value of a transformer is from 0 to 255 in increments of 1.

The setpoints for the calibration value of the voltmeter and ammeter are in the following list.

AC01 - "A-B" Voltage Calibration. The value is selectable from 0 to 255.

AC02 - "B-C" Voltage Calibration. The value is selectable from 0 to 255.

AC03 - "C-A" Voltage Calibration. The value is selectable from 0 to 255.

AC04 - "A" Current Calibration. The value is selectable from 0 to 255.

AC05 - "B" Current Calibration. The value is selectable from 0 to 255.

AC06 - "C" Current Calibration. The value is selectable from 0 to 255.

Procedure For Voltmeter/Ammeter Programming

Note: Service mode cannot be entered when the ECS is in the AUTO position.

Note: Any active shutdown fault must be made inactive in order to access service mode. A FLASHING shutdown indicator means that a shutdown fault exists. To temporarily change a shutdown fault from an active shutdown fault to an inactive shutdown fault, turn the ECS to the OFF/RESET position. To permanently change a shutdown fault from an active shutdown fault to an inactive shutdown fault, the fault must not be occurring. Also, the ECS must be turned to the OFF/RESET position. If the jumper from terminal 6 to terminal 9 is not installed on the ECS, then the GSC will not power up in OFF/RESET and any active shutdown fault must be corrected before entering service mode.

1. Turn the ECS to the STOP position in order to shut down the engine. Enter service mode and enter the password. "OP 1" is showing on lower display. See Systems Operation, "Service Mode" for more information. See the Systems Operation, "Password Entry OP3" for more information.

2. Press "SCROLL UP" key seven times. "OP 8" is showing on the lower display.

3. Press "SELECT" key. "AC01" is showing. The value of the setpoint is also showing. The value will range from 0 to 255.

4. Press "SELECT" key. The value of the setpoint is flashing.

5. Press "SCROLL UP" or "SCROLL DOWN" key to adjust the value of the AC01 setpoint to match the value shown on the ATB for "A-B" voltage.

6. Press "ENTER" key. The value of the setpoint stops flashing.

7. Press "SCROLL UP" key. Repeat steps 3, 4, 5 and 6 for setpoints AC02 through AC06.

8. Press "EXIT" key. "OP 1" is showing on the lower display.

9. Press "EXIT" key. The display will return to the normal mode.