Log Time Interval; Datalogger Events - Siemens SITRANS FUS1020 Manual

Nema-4/ip 65 clamp-on transit-time flowmeter

Table of Contents

Section 6

NOTE: The time interval-based Datalogger records the state of all the alarms at the selected

report time only. Therefore, if an alarm condition resets before the report time, it would

not appear on the report. Use Datalogger Events to log transient alarms. This mode

generates a report upon the detection of an alarm event.

To select Datalogger Data items:

To access the Datalogger Data option list press the <Right Arrow>. Move the cursor to the

desired data item by pressing the <Up/Down Arrows> then press <ENTER> to select it.

Note that a plus sign (+) appears before the item.

To de-select Datalogger Data:

Move the cursor to the data item then press <ENTER>. Note that this removes the plus sign (+)

from the item.

After selecting/deselecting all desired items press the <Left Arrow> to leave the Datalogger

Data option list.

6.8.3 LOG TIME INTERVAL

The Datalogger records a "snapshot" of conditions at each log time interval. Datalogging uses a con-

siderable amount of RAM, so only select short log intervals if it is fully justified.

NOTE: The meter maps the first Datalogger report time to an even division of its clock. Subse-

quent reports will conform to the selected interval.

To set the Log Time Interval:

To access the [Log Interval] option list press the <Right Arrow>.

Move the cursor to desired interval by pressing the <Up/Down Arrow>.

To store your selection press <ENTER>.

The 1020 offers "event-based" data logging that operates concurrently with "time interval" based data

logging. The event-based function generates a Datalogger report upon the triggering of any of the

alarms. This is useful for recording transient alarms (e.g., a liquid interface or a short aeration alert).

NOTE: An Alarm Event report will be generated immediately after the transition from a non-

alarm to an alarm event. The reverse situation (alarm state to non-alarm state) does

not trigger the event-based Datalogger.

Event-based Datalogger messages conserve memory. However, if you use this feature to monitor a

level such as Flow Alarm, set the alarm threshold high enough to avoid repetitive triggering. You must

select Site ID (Name) and Time to "time-stamp" the alarm events. Note that on the Datalogger report,

a [-] represents a reserved letter code space (inactive alarm) and a letter code represents an active

alarm.

6-49

1020NFM-1D

Table of Contents