Service manual

MDS E-SCAN MPR E-SCAN OPERATION/CALIBRATION

Measurement Alarm Divert: If the measurement falls below this limit, a system alarm is

activated. An error message will appear in the status window in normal mode, and the divert

alarm relay will be turned off to activate a divert to the Monitor.

Measurement Alarm Low: If the measurement drops below this limit, a system alarm is

activated. An error message will appear in the status window in normal mode, and the low

measurement alarm relay will be turned on.

Measurement Alarm Delay: This is the alarm delay time in seconds for the process

measurement that must expire while a limit is exceeded before an error is activated.

Purge Cycle Time: This is the time interval in minutes between automatic purging. During

purging, all system readings and analog outputs are frozen. A “0" setting disables automatic

purging.

Condensate Drain Time: When the purge cycle is activated, this is the time in seconds that

elapse before a prism clean occurs. During this time the condensate drain relay is activated and

condensation is allowed to drain before steam cleaning.

Prism Clean Time: This is the time in seconds during which cleaning of the prism occurs and

the prism clean relay is activated.

Hold Delay Time: This is the time in seconds that elapse after a prism clean occurs. This time

allows a delay to occur before resuming normal process measurement. Readings are held

constant during the period.

Meas. Anlg. Min. Output: This is the measurement reading that will produce a 4 ma or 0 volt

output.

Meas. Anlg. Max. Output: This

is the measurement reading that

will produce a 20 ma or 10 volt

output.

Filter Weight: This is a value

that controls system response

time to process measurement

changes. The larger the value the

slower the response time. The

filter weight divided by 10 will

give approximate response time

in seconds to achieve 63% output

of a step input change.

Calibration Limits Screen 2