Service manual

MDS E-SCAN MONITOR OPERATION

SYSTEM:

This status field is used to monitor many system functions and to issue warnings instead of errors

so that the operator can be notified of problems that are not fatal but need to be addressed. The

following warnings can be displayed in this status field:

CHK LAMP VOLTAGE: This indicates the lamp voltage in a sensing head is above 4.0

volts. CAUTION- If lamp voltage reaches 4.2 volts the

refractometer will be taken out of service. To adjust see

Maintenance section 8.5.

CHK PURGE LOG: This indicates that a second or third attempt was needed to clean

the prism. Therefore, the operator should check the purge log in

order to determine how much steam time was needed during the

purge operation.

CHK ANLG. SOLIDS: This indicates that the solids reading derived by the 0-10 volt input

to the Monitor unit does not agree with the solids reading sent to

the Monitor unit via the serial port.

CHK ANLG. TEMP.: This indicates that the temperature reading derived by the

temperature voltage input to the Monitor unit does not agree

with the temperature reading sent to the Monitor unit via the

serial port.

CHK U1-U2 COM2: This indicates that the communication between the MPR E-Scan

units via serial port 2 has failed, and therefore all communication

between the MPR E-Scan units is now going through the Monitor

unit.

PRINTER ERROR: This indicates that there is a problem with the printer.

TREND:

This status field is used to monitor the rate of change in solids readings in order to predict how

much time would have to pass at the present rate of change until a divert occurred. This is also a

warning status, and is triggered by the trend limit specified by the operator in the Monitor

Configuration Limits menu option. For example, if the trend limit is set for 30 minutes, then a

trend warning will only be activated if a divert is anticipated within 30 minutes.

DIVERT ERROR: This indicates a divert has occurred. The cause could be any of the

following which would be specified by the printout: Low solids

Divert, Unit Failure Divert, Remote Divert, Diagnostic Divert.