Xylem Expert 800-900 - Manual (Page 16)

Manual
GB Manual Expert Log 800-900.doc
16
Building Mean value after X measurements at 1 second intervals
This function enables the averaging over "X" measurements at intervals of one second each.
Recording is initiated only after the average has been determined, even if the recording interval
chosen is smaller.
For example, "Recording interval after event” = 1 second, X = 5:A measured value is recorded once
every 5 seconds.
Event
Following events / start conditions can be selected as conditions for recording:
- Interval (continuous recording without startcondition)
- On at Val1, Off at Val2 (recording above resp. below a certain level)
- Save if delta Channel > Val1 (recording on changing of the signal)
- Start recording if Channel > Val1 (Start recording above a certain level)
- Start recording if Channel < Val1 (Start recording below a certain level)
Interval
In addition to Building Mean value after X measurements at 1 second intervals, this function is
meant to record the mean values of the selected channels.
Recording is done at a fixed interval independent of Fixed Save-Interval. If Recording interval after
event has been selected in addition to Event Detect Interval, the smaller of the two intervals shall
always apply.
On at Val1, Off at Val2
- If Val1 < Val2 respectively recording below a certain level
Recording takes place if the measured value of the channel where event-driven recording is
scheduled is less than Val1, until the measured value is greater than Val2. (Hysteresis = Val2-Val1)
- If Val1 Val2 respectively recording above a certain level
Recording takes place if the measured value of the channel where event-driven recording is
scheduled is greater than Val1, until the measured value is less than Val2. (Hysteresis = Val1-Val2)
On if Ch < Val1, Off if Ch > Val2 On if Ch > Val1, Off if Ch < Val2
Val1 < Val2
Ch
Val2
Val1
t
= Recording
= measured Value
}
Hysteresis
Val1 Val2
Ch
Val1
Val2
t
= Recording
= measured Value
}
Hysteresis