Yokogawa 2-Wire Dual Channel Transmitter/Analyzer FLXA21 Instrukcja Użytkownika Pobierz pdf (Strona 181)

<15. OPERATION OF SENCOM pH/ORP>

15-12

IM 12A01A02-01E 5th Edition : Oct. 31, 2013-00

15.5 Trend graphics

Pressing on the Zoom display changes the display to a graphical mode in which the

average measured value is shown on a time scale. The “Live” value is also digitally displayed in

atextbox.Thetimescale(X-axis)andtheprimaryvaluescale(Y-axis)aresetinthe“DISPLAY

SETUP”menu(Section16.7.2).

The screen displays the trend of up to 41 averages of the measurement for each time interval.

The FLXA21 samples the measurements every second. The trending graphic also shows the

maximumandminimummeasuredvaluesinthatinterval.

Forexample,ifthetimescaleissetto4hours,thenthetrendisshownfor4hourspriortothe

actualmeasurement.Eachpointonthetrendlinerepresentstheaverageover4×60×60/41=

351 measurements (seconds).

NOTE

Updatingthetrendscreensetupresetsthecurrenttrendgraphandstartsanewone.

12.00

8.40

5.60

2.50

12:00 12:20 12:40

10.38pH

Minimum

Maximum

Average

Time

Tag:

Measurement value (pH)

SENCOM

pH1

Current process value

Max. and min. values on this display

Figure 15.10 Trend screen

The 1st display item data on the Main display is shown as a graph. Touching any point on the

display changes the display to the 2nd display item data (and to the 3rd display item data if set)

and then returns to the Main display.

1 2 ... 176 177 178 179 180 181 182 183 184 185 186 ... 245 246

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Yokogawa 2-Wire Dual Channel Transmitter/Analyzer FLXA21 Instrukcja Użytkownika Strona 181