Service manual

MDS E-SCAN MPR E-SCAN OPERATION/ DIAGNOSITIC SELECTION

2.5 Diagnostic Selection

The Diagnostics menu contains the following options:

1. Voltages - This displays all

pertinent system voltages such as:

measurement voltage, temperature

voltage, and lamp voltage.

2. Relays - This allows the

operator to toggle system relays

for testing or troubleshooting

purposes. The toggled relays can

be visually checked by examining

the relay LEDS on the interface

board. This option also allows the

operator to test custom inputs.

3. Anlg. Out - This option enables the operator to test system output as well as calibrate the

output to work with various analog loads.

4. Time/Date - This option enables the operator to reset the system clock with a valid time and

date. Such adjustments may be necessary as a result of time zone differences or when the system

clock batteries fail.

The “Voltages option results in the following display:

Measurement Voltage: The

voltage produced when measuring a

solution sample. The first voltage

displayed is the raw sensing head

voltage. The voltage in brackets is

the compensated voltage. Range is

(0-10 volts). See also Analog O

menu.

Temperature Voltage: A voltage

that produces the process

temperature readout as follows:

(Voltage - .5v) * 50 = Deg. C.

Lamp Voltage: A nominal voltage

needed to maintain a signal of

proper amplitude.

Diagnostics Mode Screen

Diagnostic Voltages Screen