ULFIA Elektronik AB 24-0025-3201-64 CMT-2 Test box
2003-04-21 U.A. rev. 1 page 4of 14
This equipment is used for troubleshooting compaction meter system, used on vibratory rollers.
All the used units in the system could be checked, including
sensor: ULFIA item no. 23-0020.
processor: CMP-2B (black metal box), ULFIA item no. 21-0026.
or CMP-3 (black metal box), ULFIA item no. 21-0058.
(serial communication and distance pulse interface could not be tested.)
or ALPHA 8. (gray plastic box), ULFIA item no. 24-0012.
CMV-indicator: ULFIA item no. 38-0005, 38-0017.
interconnection cables:
For measurements a separate DMM (Digital MultiMeter) should be connected to the test box.
The DMM should be able to measure DC-voltage(Vdc), AC-voltage(Vac) and resistance(ohm).
The internal resistance of the multimeter should be >=10Mohms.
To test CMP-3 you need an adapter cable, ULFIA 49-0076.
The processor and sensor could also be checked in a service location. An external power supply or
battery is then connected to the test box.
The following tests could be done,
SENSOR :signal output : DC-voltage : constant voltage with or without vibration,
AC-voltage when the sensor is vibrating,
cable to sensor.
PROCESSOR : Power supply voltage output to : recorder or onboard computer,
sensor.
CMV-output signal to the CMV-instrument with the sensor signal simulated
with the built in calibrator in the test-box.
CMV-output signal and frequency pulse output to the recorder or on board
computer with the sensor signal simulated with the built in calibrator in the test-
box.
Output signal(Vdc) to analog frequency indicator.
Output signal(Vdc) to analog amplitude indicator.
Output to bouncing- and CMV-range indicator lamps.
CMV-indicator : Resistance of the signal input,
CMV-indication,
BOUNCING and CMV-range indicator lamps.
ROLLER : Power supply voltage from the roller battery.
Cable harness to processor and CMV-indicator.
Introduction
