Service manual

MDS E-SCAN MONITOR OPERATION

+15 VOLT ERROR: This indicates that the plus 15 volt supply is outside the allowable

10% tolerance levels, which means it is either below +13.5 volts or

above +16.5 volts.

-15 VOLT ERROR: This indicates that the minus 15 volt supply is outside the

allowable 10% tolerance levels, which means it is either above

-13.5 volts or below -16.5 volts.

+5 VOLT ERROR: This indicates that the plus 5 volt supply is outside the allowable

10% tolerance levels, which means it is either below +4.5 volts or

above +5.5 volts.

SENS. HEAD:

This status field monitors the status of the MPR E-Scan unit sensing head voltage levels. The

following errors can be displayed in this status field:

MEAS. VOLT ERROR: This indicates that the measurement voltage in the sensing

head is out of specification and is either below 0.5 volts or above

9.5 volts.

TEMP. VOLT ERROR: This indicates that the temperature reading derived from the

sensing head voltage is out of specification and exceeds the

temperature high or low limits set in the Monitor Configuration

Limits Menu.

LAMP. VOLT ERROR: This indicates that the voltage needed to maintain a signal of

proper amplitude for the light source is out of specification.

Below 2.5 or above 4.2 volts D.C.

COMM:

This status field is used to indicate an RS-232 communication error between the Monitor and the

MPR E-Scan units. The following error can be displayed in the status field:

COMM. FAILED: This indicates a communication failure, which could be the result

of a bad serial port, bad wiring, or a dead CPU.

PURGE:

This status field monitors all system steam purge functions. The following errors pertaining to

purging can be displayed in this status field:

PURGE FAILED: This indicates that a proper measurement voltage drop was not

seen by either the MPR E-Scan or the Monitor during the purge

operation and thus intelligent cleaning was not effective.