COVER GP-ACCESS 4882866 - Caterpillar

Illustration 19 g00780064
(6) "SPAN" adjusting screw on the transmitter (7) "SPAN" adjusting screw on the tachometer
Turn the transmitter's "SPAN" adjusting screw (6) until the display on the ammeter is 20 mA. Turn the tachometer's "SPAN" adjusting screw (7) until the display on the tachometer is "5000".The transmitter's output of 20 mA corresponds to a display of "5000" rpm on the tachometer.Note: Remember that the display represents one-tenth of the actual rpm. To determine the actual rpm, multiply the tachometer's display by ten. A display of "5000" that is multiplied by ten indicates 50,000 rpm. This is the maximum reading.Note: If you are using the tachometer for an ABB turbocharger with the 168-3630 Speed Sensor , the transmitter's "SPAN" may not have the correct range. This will be due to the position of the jumper block in the transmitter. For this situation, turn OFF the power to the tachometer's system. Remove the transmitter from the instrument panel. Move the jumper block to pin location "F". See ""Configuring the Transmitter"". Then reinstall the transmitter and perform the calibration procedure.
Verify that the transmitter's output of 4 mA produces a display of "0000" on the tachometer and that an output of 20 mA produces a display of "5000".
When the calibration is complete, turn OFF the power to the tachometer's system. Turn OFF the signal generator.
Remove the signal generator and the ammeter.
Install the plug over the adjustment controls on the rear of the tachometer. Reconnect wire (1) between the negative terminal "-" on the "OUTPUT" end of the transmitter and the positive terminal "+" on the tachometer.
Reconnect leads (2) and (3) from the speed sensor to the positive "+" and negative "-" terminals on the "INPUT" end of the transmitter.Proceed with normal operation.Performance Data
Records of performance are an important element of a maintenance program. You are encouraged to monitor the trends of performance over time.Obtain data for use as a baseline when the installation is new. Frequently record new data over time during engine operation. Review the data in a graphic form at regular intervals. The trend information can help predict problems with operation.Table 4 is an example of a log for recording performance data for operation of the turbocharger. This is not a complete list of all the factors that can affect the turbocharger. However, the data for the parameters can be obtained with common devices such as equipment for measuring temperature and pressure.
Table 4
Performance Data for the Turbocharger    
Customer name     Engine model     Serial number    
Technician                                
Time                                
Date                                
Service hours                                
Ambient air temperature                                
Parameter