ADC 410F Betriebsanleitung PDF herunterladen (Seite 62)

7/11

Check of set

point display

1) Switch on power source, allow at least 15 minutes’ warm-up time. .

2) Set switch D (front panel of GS 8A) to “0” position.

3) Adjust zero to 0 or 4 mA with the 10-turn potentiometer P (front panel of GS 8A),

depending on setting in Fct. 1.05, deviation <±10 µA.

4) Calculate position of switch Y and displayed setpoints ”I“ and ”f“:

4.1) X =

100%

full-scale range (100%) in volumetric unit V per unit time t

GK primary constant, see instrument nameplate

DN meter size DN im mm, not inches, see instrument nameplate

t time in seconds (Sec), minutes (min) or hours (hr)

V volumetric unit

K constant, according to following table

t Sec min hr

Liter 25 464 424.4 7.074

m3 25 464 800 424 413 7 074

US gallons 96 396 1 607 26.78

4.2) Determine position of switch Y: Use table (front panel GS 8A) to determine value Y

which comes closest to factor X and meets condition Y ≤ X.

4.3) Calculate set

point reading ”I“ for current output: I = I

100%

- I

) in mA

current (0/4mA) at 0% flowrate

100%

current (20mA) at 100% flowrate

4.4) Calculate set

point reading ”f“ for pulse output: f =

100%

in Hz

100%

pulses per second (Hz)

at 100% flowrate

5) Set switch D (front panel GS 8A) to position “+“ or “-“ (forward/ reverse flow).

6) Set switch Y (front panel GS 8A) to the value determined by the method described above.

7) Check setpoint readings I and f, see points 4.3 and 4.4 above.

8) Deviation <1.5% of setpoint. If greater, replace signal converter, see Sect. 8.7.

9) Test of linearity: set lower Y values, readings will drop in proportion to the calculated Y

values.

10) Switch off power source after completing the test.

11) Disconnect the GS 8A.

12) Reassemble in reverse order, see points e) – b) under “electrical connection”,

see illustration in Sect. 8.5.

13) The system is ready for operation after the power source has been switched on.

Exam

ple: see overleaf

Note:

Sticker on the GS 8 primary head simulator still gives values for

“inch” flowmeter. Do not use any more !

1 2 ... 57 58 59 60 61 62 63 64 65 66 67 ... 78 79

Kommentare zu diesen Handbüchern

Keine Kommentare

ADC 410F Betriebsanleitung Seite 62

Kommentare zu diesen Handbüchern

Verwandte Produkte und Handbücher für Vernetzung ADC 410F