PULLEY 2273814 - Caterpillar

Read these instructions carefully before installing or operating this device.The thermocouple leads from this system operate at very low voltage and power levels and MUST NOT CONTACT any external voltage source. Damage to the system will result from connection between the thermocouple leads and the ignition system or any AC or DC power source.
Deviation from these installation instructions may lead to improper engine operation which could cause personal injury to operators or other nearby personnel.
Description
The digital pyrometer with alarm is an electronic instrument designed to monitor temperature at nine separate points using industry standard thermocouple probes.This device allows the readout of up to eight engine exhaust temperature locations. Two devices are used on engines with more than eight cylinders.A front panel push button switch allows the user to select the desired thermocouple input. The location selected and the monitored temperature are displayed continuously on the LCD display.The channel "0" thermocouple input is continuously compared against a high limit setpoint while providing readout and monitoring of high limit protection for the exhaust stack on the channel "0".The high limit setpoint input is set by the operator from the front of the instrument. If the setpoint is exceeded, an output switch is activated to ground. Operating power is from 12-125 VDC.
Digital PyrometerOperation
Readout Selector Switch - The pyrometer cylinder readout can be configured for use on in-line engines of 6 to 8 cylinders reading 0 through 8 or for use on vee engines of 12 to 16 cylinders where two devices are used, one on each bank of the engine.On vee engines, one device is set for V - even and the other for V - odd to conform to the standard cylinder numbering system. This switch is located on the lower left side of the device back. This switch is of a locking type to prevent accidental actuation.To select a new switch position, lift upwards on the toggle while actuating. Release the toggle to lock in a new position. Temperature Readout - The device must be supplied from a suitable power source wired in accordance with the attached Wiring Diagrams.Each time the device is powered up, it will start reading the temperature value of channel "0". To read the temperature values on the other eight channels (1 through 8), push the "PUSH TO ADVANCE" button (1) on the front panel. The display will advance to the next successive point and read the temperature at the location indicated on the display.Alarm Setpoint Adjustment
The high temperature limit setpoint for monitored channel "0" is read by depressing the "PUSH TO READ" button (2).To adjust the setting, use a small screwdriver to turn the adjustment (3) until the display readout matches the desired temperature. Rotating the adjustment clockwise (CW) increases the setpoint.The output switch will be activated when the display readout exceeds the preset number. When this occurs, the alarm horn will sound and "A-3" will flash on Module # 3. Pushing touch buttons 1, 2 or 3 will silence the horn. The setpoint