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Page 62
SITRANS LG200 – INSTRUCTION MANUAL
7ML19985KA02
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dimension. In this case, a negative Lvl Ofst needs to be entered. In doing so, all
measurements are then referenced at a point up on the probe as shown in Example 3.
Example 3 (Lvl Ofst = -6):
Application calls for a 122 cm (48")
cage-coaxial flanged probe
measuring water in a chamber with
the bottom of the probe 15 cm (6")
below the lower process
connection. The user wants the
4 mA point to be 0 cm (0") at the
bottom process connection and the
20 mA point to be 76 cm (30") at the
top process connection.
Volume Units (Vol Units)
Applicable only when Lvl&Vol, Ifc&Vol selected. Select the volume units. (User password)
Strapping Table (StrapTbl)
Applicable only when Lvl&Vol, Ifc&Vol selected. Access the strapping table (also called
Volume Breakpoints). Enables conversion from level to volume. (User password)
Strapping Table (Breakpoints)
SITRANS LG200 is available with a 20-point custom strapping table. Up to 20 pairs of
Level—Volume points can be entered to linearize the 4 to 20 mA output for odd-shaped
vessels.
There are two ways to enter data into the strapping table.
Procedure 1 (this method is the most common):
1.
Select Level and Volume as the Measurement Type.
2.
Ensure that the correct Level Units and Volume Units are chosen.
3.
Scroll down to the StrapTbl parameter and press Enter. Pt01Lvl is displayed.
4.
Press Enter, then enter the desired level for Point 1 in the strapping table and press
enter.
5.
Enter corresponding volume for Point 1 in the strapping table (shown as Pt01Vol on
the LCD) and then press Enter.
6.
Repeat steps 4 and 5 for remaining points.
Values
liters
gallons (Default)
Values
Press Enter to access strapping table. See below to setup
strapping table. (Default: Pt Lvl: 0.0 cm, Pt Vol 0.0 g)
20 mA
4 mA
6"
30"
Lvl Units: in
PrbModel: 7xR-x
PrbMount: Flange
PrbLn: 48"
Lvl Ofst: -6.0 in
Dielctrc: 10 -100
Set 4mA: 0"
Set 20 mA: 30"
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Страница 96: ...Page 92 SITRANS LG200 INSTRUCTION MANUAL 7ML19985KA02 Hazardous Installation ...