Table 2-12. Status Readout

9-2320-279-20-1

Instructions (Cent)

(1) Pressure Transducers. The pressure transducers have a small breather hole on the side of the

housing which should be kept unplugged. Do not use high pressure shop air to blow out the 25 psig

transducer.

Make sure that the slotted hole in the engine tachometer drive shaft is clear

and not hard packed with lubricant before installing the pulse tachometer.

Threaded Adapters. Look at threaded fittings carefully to avoid engaging straight threads with

pipe threads. Each measurement device (transducer) in the transducer kit

its own identification

resistor. The VTM uses this identification resistor to check that the correct transducer is connected for the

measurement being made. If the correct transducer is not connected, error code EO02 will be displayed.

of Readouts. The following paragraphs describe and show the different types of readouts

that can occur during testing.

(1) Status Readout. A status readout keeps the operator informed of what is happening. For

example, .8.8.8.8 is displayed each time the power switch is pushed on. It means that power is applied,

and that all elements of the display are operative. It changes to ---- 1.5 seconds later, indicating that the

2-12. -

The

readout

are described in

VTM is ready to be used for

2-12. Status Readout

VTM Readout

Interpretation

A readout of .8.8.8.8 appears for 1 to 2 seconds each time that the power is applied

.8.8.8.8

to the VTM. It means that there is power to the VTM, and that all elements of the

readout display are operative.

A readout of ---- indicates the following:

(1) After power turn-on, signifies that the VTM is ready for testing.

(2) During a compression unbalance test, signifies testing is in progress.

.9.9.9.9

A readout of .9.9.9.9 indicates that the VTM is reading a test value beyond the

range of its measurement capability. Either the wrong test number is selected for

the parameter being measured, or there is a fault in the vehicle.

PASS

A PASS or FAIL readout is the result of a test that checks the condition of a

FAIL

component being measured. A PASS/FAIL readout means just that - the component

either passes the test or fails the test.