Quick Start Guide
D103470X012
DLC3020f Digital Level Controller
April 2022
33
Table 3. FIELDVUE DLC3020f EMC Summary Results—Immunity
Port
Phenomenon
Basic Standard
Test Level
Performance Criteria
(1)
Enclosure
Electrostatic discharge (ESD)
IEC 61000‐4‐2
4 kV contact
8 kV air
A
Radiated EM field
IEC 61000‐4‐3
80 to 1000 MHz @ 10V/m with 1 kHz AM at 80%
1400 to 2000 MHz @ 3V/m with 1 kHz AM at 80%
2000 to 2700 MHz @ 1V/m with 1 kHz AM at 80%
A
Rated power frequency
magnetic field
IEC 61000‐4‐8
30 A/m at 50/60 Hz
A
I/O signal/control
Burst
IEC 61000‐4‐4
1 kV
A
Surge
IEC 61000‐4‐5
1 kV (line to ground only, each)
A
Conducted RF
IEC 61000‐4‐6
150 kHz to 80 MHz at 3 Vrms
A
1. Performance criteria: +/- 1% effect. A = No degradation during testing. B = Temporary degradation during testing, but is self‐recovering.
Table 4. Fisher 249 Sensor Specifications
Input Signal
Liquid Level or Liquid‐to‐Liquid Interface Level:
From
0 to 100 percent of displacer length
Liquid Density:
From 0 to 100 percent of
displacement force change obtained with given
displacer volume—standard volumes are
J
980 cm
3
(60 inches
3
) for 249C and 249CP sensors or
J
1640 cm
3
(100 inches
3
) for most other sensors;
other volumes available depending upon sensor
construction
Sensor Displacer Lengths
Sensor Working Pressures
Consistent with applicable ANSI
pressure/temperature ratings for the specific sensor
constructions shown in tables 7 and 8
Caged Sensor Connection Styles
Cages can be furnished in a variety of end connection
styles to facilitate mounting on vessels; the
equalizing connection styles are numbered as shown
in figure 20.
Mounting Positions
Most level sensors with cage displacers have a
rotatable head. The head may be rotated through
360 degrees to any of eight different positions,
shown in figure 4.
Construction Materials
Operative Ambient Temperature
See table 5. For ambient temperature ranges,
guidelines, and use of optional heat insulator, see
figure 7.
Options
J
Heat insulator
J
Gauge glass for pressures to
29 bar at 232
_
C (420 psig at 450
_
F), and
J
Reflex
gauges for high temperature and pressure
applications
Table 5. Allowable Process Temperatures for Common Fisher 249 Sensor Pressure Boundary Materials
Material
Process Temperature
Minimum
Maximum
Cast Iron
-29
_
C (-20
_
F)
232
_
C (450
_
F)
Steel
-29
_
C (-20
_
F)
427
_
C (800
_
F)
Stainless Steel
-198
_
C (-325
_
F)
427
_
C (800
_
F)
N04400
-198
_
C (-325
_
F)
427
_
C (800
_
F)
Graphite Laminate/SST Gaskets
-198
_
C (-325
_
F)
427
_
C (800
_
F)
N04400/PTFE Gaskets
-73
_
C (-100
_
F)
204
_
C (400
_
F)
