Emerson Rosemount 2140, Справочное руководство, Страница: 114 / 144

Specifications and Reference Data
January 2017
Reference Manual
00809-0100-4140, Rev AA
104
Specifications and Reference Data
Gasket material for 3 /
4
- and 1-in. BSPP (G) process connection is
non-asbestos BS7531 Grade X carbon fiber with rubber binder.
Gaskets are not supplied with flanged process connections.
Extended fork lengths
The maximum extended length is 157.5 in. (4000 mm) except
for ECTFE copolymer coating and polished process connection
options which have a maximum length of 59.1 in. (1500 mm)
and 39.4 in. (1000 mm) respectively.
Table A-1 has a summary of the minimum extended lengths.
See “Dimensional drawings” on page 106 for other
dimensions.
Table A-1. Minimum Extended Lengths
A.1.3 Performance specifications
Hysteresis (water)
Approximately 0.1 in. (2.5 mm).
Switching point (water)
Approximately 0.5 in. (13 mm) from tip of fork (if vertical
installation) or from edge of fork (if horizontal installation).
Switching points vary with different liquid densities. The
Rosemount 2140, with Extended Features Package added,
allows pre-selection of a liquid type, and has a built-in learning
function to make it even easier.
Switching delay
Switching delay is programmable from 0 to 3600 seconds.
Default delay is 1 second.
Liquid density ranges
Low (400 to 600 kg/m
3
), medium (500 to 900 kg/m
3
),
standard (800 to 1300 kg/m 3 ), and high (1200 to 3000 kg/m 3 )
Liquid viscosity ranges
Up to 1000 cP (centiPoise) in Enhanced mode.
Up to 10000 cP (centiPoise) in Normal mode.
A.1.4 Electrical specifications
Power supply
10.5 to 42.4 Vdc (with no load).
Output
Software selectable analog output type:
– 8/16 mA HART switched output state,
– Custom mA HART switched output state,
– 4–20 mA HART, or
– LEVELTESTER switched output state.
Digital process variable is superimposed on 4-20 mA signal,
available to any host that conforms to HART protocol.
Selectable digital HART revisions, HART5 (default) or HART7.
The revision can be switched using any HART-based
configuration tool or the optional local operator interface.
Grounding
The Rosemount 2140 and Rosemount 2140:SIS must always be
grounded through the provided external ground connection.
Terminal connections (wire diameter)
Minimum 24 AWG and maximum 14 AWG (0.2 to 2.5 mm
2
)
A.1.5 Environmental specifications
Ambient temperature limits
–40 to 175 °F (–40 to 80 °C) with or without the LOI display.
See also Appendix B: Product Certifications for the reduced
ambient temperature limits required by approvals.
Minimum and maximum operating temperatures
See Figure A-1 for operating temperatures.
Check Appendix B: Product Certifications for the operating
temperature ranges covered by the approvals.
Maximum operating pressures
The final rating depends on the selected process connection.

Threaded connection: See Figure A-2 for operating pressures.

Tri Clamp connection: 435 psig (30 bar g).

Flanged connection: See Figure A-2 or Table A-2 (whichever
gives the lowest pressure).
Process connection Minimum extended length
3
/
4
–in. threaded 3.8 in. (95 mm)
1–in. threaded 3.7 in. (94 mm)
Flanged 3.5 in. (89 mm)
Tri Clamp 4.1 in. (105 mm)