Mercoid CRF2 Series Installation And Operating Instructions

Series CRF2 Capacitive Level Transmitter
Specifications - Installation and Operating Instructions
By Dwyer
The Series CRF2 Capacitive Level Transmitter is a level transmitter providing a two-
wire 4 to 20 mA output to indicate level of liquids, powders and bulk materials. State of
the art sensing technology in the CRF2, using impulse RF admittance measurement
provides excellent accuracy and stability. The CRF2 senses capacitance changes
resulting from the height of the material in the tank between the probe and the tank
wall. In non-metallic tanks or tanks that do not have the wall parallel to the probe a
ground reference must be used.
The CRF2 comes with either a rigid or flexible probe depending on application
Installation need and probe length required. Featured in the CRF2 is easy push button
calibration of zero and span. Custom order the CRF2 to any length probe that you
need for your application. FEP covered probe is ideal for use with corrosive media.
MERCOID
A DIVISION OF
DWYER INSTRUMENTS, INC.
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A.
9/16
[14.29]
3-19/32
2X 1/2 FEMALE
[91.28]
NPT CONDUIT
CONNECTION
4-1/2
[114.30]
3/4 MALE
NPT PROCESS
CONNECTION
"L"
4-7/16
[112.7]
2-3/8
[60.3]
4-3/16
2-3/4
[106.36]
[70.0]
3-1/4
[82.6]
2X 3/4 [19.05]
CLEARANCE FOR
COVER REMOVAL

SPECIFICATIONS

Service: Liquids, powders, and bulk materials compatible with wetted materials.
Wetted Materials: Standard: rod/cable: FEP; connection: 316 SS. Ground Option:
rod/cable and connection: 316 SS; cable spacers: PVC. Flange Option: material of
flange.
Capacitance Range: 0 to 2000 pF.
Sensitivity: 0.15 pF.
Minimum Span: 8 pF.
Accuracy: ±0.5 pF or ±0.25% of span, whichever is greater.
Repeatability: ±0.25 pF or ±0.1% of span, whichever is greater.
Temperature Limits: Ambient: -40 to 185°F (-40 to 85°C); Process: -40 to 250°F
(-40 to 121°C).
Pressure Limit: 100 psi (6.9 bar).
Power Requirements: 12 to 35 VDC.
Output Signal: 4 to 20 mA or 20 to 4 mA, 2 wire.
Response Time: 0.5 seconds.
Electrical Connection: Screw terminal.
Conduit Connection: 1/2˝ NPT female.
Process Connection: Standard: 3/4˝ NPT male. Optional: See model chart.
Enclosure Rating: NEMA 4X (IP66) weather-tight/corrosion resistant.
Spark/Static Protection: 106 Ω dissipation resistance with spark gap. Surge
current to 100A max.
Calibration: Zero, Span, 4 mA, 20 mA.
Mounting Orientation: Vertical.
Weight: 6 ft rod type: 3.6 lb (1.63 kg).
Phone: 219/879-8000
Fax: 219/872-9057
Bulletin L-36
2X 1/2 FEMALE NPT
6
CONDUIT CONNECTION
[152.4]
MOUNTING
BRACKET
3/4 MALE NPT
1-3/8
PROCESS CONNECTION
[34.9]
120
[3048]
Remote Mount Housing
www.dwyer-inst.com
e-mail: info@dwyermail.com
3-5/32
[80.2]
"L"