Rosemount 2120, Справочное руководство

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Reference Manual
00809-0100-4030, Rev DA
June 2007
Rosemount 2120
2-5
1. Mode switch
Dry on or wet on mode selection.
2. Switching time delay
0.3, 1, 3, 10, or 30 seconds time delay selection.
Figure 2-3. Mode Dry On, 1 second time delay (typical for high level applications)
Figure 2-4. Mode Wet On, 1 second time delay (typical for low level applications)
NOTE:
• There is a five second delay when switching between modes and time delays.
• The small cut-out in the rotating switch indicates the delay/mode chosen.
• Recommended installation for high level is dry on and low level is wet on. Do not install
in the normally ‘off’ state.
Dry On Wet On
Seconds Delay
0.3 0.3
3
30
10
1
3
30
10
1
Mode Dry ON
2
1
20
/fig1
1
a
, fig13
b.
ep
s
Dry On Wet On
Seconds Delay
0.3 0.3
30
10
3
30
10
1
3
1
212
0/f
ig
1
1
b
, fi
g1
3c.
ep
s
Mode Wet On