Emerson 3051S Spezifikationen PDF herunterladen (Seite 65)

Reference Manual

00809-0100-4801, Rev FA

October 2010

3-23

Rosemount 3051S Series

AMS v7.0

Right click on the device and select “Device Configuration” then select “SV

Config” from the menu

1. Click Next after setting the control loop to manual.

2. Enter desired scaled variable units in “Enter SV units” box and click

Next.

3. Select scaled data options: Linear or Square Root and click Next. If

square root is selected skip to Step 9.

4. Enter pressure value position 1 and click Next.

5. Enter scaled variable position 1 and click Next.

6. Enter pressure value position 2 and click Next.

7. Enter scaled variable position 2 and click Next.

8. Enter linear offset and click Next. Skip to Step 15.

9. Select Next to acknowledge that “Pressure value for position 1 is set to

zero.

10. Select Next to acknowledged that “Square root value for position 1 is set

to zero.

11. Enter pressure value for position 2 and click Next.

12. Enter square root value for position 2 and click Next.

13. Enter low flow cutoff mode: Off or On. If off is selected skip to Step 15.

14. Enter low flow cutoff value in scaled variable (custom) units and click

Next.

15. Select Next to acknowledge that the loop can be returned to automatic

control.

16. Select Finish to acknowledge the method is complete.

DP Level Example

Figure 3-9. Example tank A differential transmitter is used in a level application where the span is

188 inH

O (200 in. * 0.94 sg). Once installed on an empty tank and taps

vented, the process variable reading is -209.4 inH

O. The process

variable reading is the head pressure created by fill fluid in the capillary.

Based on Figure 3-9, the Scaled Variable configuration would be as

follows:

20 mA

4 mA

230 in.

200 in.

0.94 sg

12 in.

Scaled Variable units: inches

Scaled data options: linear

Pressure value position 1: 0 inH

O (0 mbar)

Scaled Variable position 1: 12 in. (305 mm)

Pressure value position 2: 188 inH

O (0.47 bar)

Scaled Variable position 2: 212 in.(5385 mm)

Linear offset: -209.4 inH

O (-0.52 bar)

1 2 ... 60 61 62 63 64 65 66 67 68 69 70 ... 239 240

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