Emerson Rosemount 1152 Alphaline, Справочное руководство

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Reference Manual
00809-0100-4235, Rev BA
April 2007
3-5
Rosemount 1152
Figure 3-3. Zero Adjustment, E
or N Output.
To achieve large amounts of elevation or suppression, the E output
electronics have a switch and N output electronics have either a switch or
three turrets on the component side of the amplifier board (refer to Electrical
Housing Disassembly on page 5-4 and to Figure 5-2 on page 5-6 to locate the
amplifier board). The slide switch, shown in Figure 3-4 on page 3-6, has three
positions. The middle position allows moderate amounts of elevation or
suppression. To achieve large elevations or suppressions, move this switch to
the “elevate zero” or “suppress zero” position. If the amplifier board has three
turrets, shown in Figure 3-5 on page 3-6, large elevations or suppressions are
achieved by connecting a jumper wire between the middle terminal and the
terminal marked “EZ” (elevation) or “SZ” (suppression).
To make large elevation or suppression adjustments using the L output
electronics (10–50 mA), it is necessary to move a jumper pin assembly on the
component side of the amplifier board. The jumper pin has three positions, as
shown in Figure 3-4 on page 3-6. The middle position allows normal levels of
elevation or suppression. To make larger adjustments, move the jumper to the
Elevate Zero or Suppress Zero position (marked EZ and SZ accordingly).
600% Zero Elevation
Output
(mA)
20
4
Pressure (inH
2
O)
600% Zero Elevation
➀
20
Output
(mA)
4
0
25
Pressure (inH
2
O)
No Zero Elevation or Suppression
➀
20
4
Output
(mA)
Pressure (inH
2
O)
500% Zero Suppression
➀
➀
Graphs are based on a Range Code 4 (0–25 to 0–150 inH
2
O
Rosemount 1152 Transmitter with a calibrated span of 25 inH
2
O.
-150 -125 -100 -75 -50
-25 0
25
0
25 50
75 100 125 150
Pressure (inH
2
O)
500% Zero Suppression
➀
500% Zero Suppression
1152-0282A