Model EDS880/1
High Pressure Conductivity Sensor
Instruction Sheet
PN 51A-EDS880/1/rev.A
August 2006
CAUTION
SENSOR/PROCESS
APPLICATION COMPATIBILITY
The wetted sensor materials may not be compatible
with process com position and operating conditions.
Application compat ibility is entirely the responsibility
of the user.
CAUTION
BEFORE REMOVING THE SENSOR, be
absolutely certain the process pressure is
reduced to 0 psig and the process temperature is at a safe level!
For additional information, please visit our website
at www.emersonprocess.com/raihome/liquid/.
SPECIFICATIONS—SENSOR
Maximum Pressure: 2880 psig (20,000 kPa abs)
Temperature: 32-392ºF (0-200ºC)
Process connection: M25 male with copper gasket
Wetted materials: titanium and zirconium oxide
SPECIFICATIONS—PROCESS CONNECTOR
Adapter: 1 inch MNPT x M25 female
Wetted materials: 316 stainless steel
Figure 1: Model EDS880/1 sensor
in
mm
WIRING
MODEL EDS880/1 INSTALLATION & WIRING
2
WIRE FUNCTION PLUG CONNECTION 54eC CONNECTION
coax braid outer electrode ground terminal TB1-8
coax internal conductor inner electode terminal 3 TB1-11
yellow conductor RTD in terminal 1 TB1-5
blue conductor RTD return terminal 2 TB1-3 (see note)
overall braid shield no connection TB1-ground
Warning: The EDS880/1 sensor contains a Pt 1000 RTD for temperature measurement. Typically, RTDs are connected to the analyzer using a three-wire configuration. The third wire, the sense line, is used to correct for
cable resistance and for changes in cable resistance caused by changes in ambient temperature. The cable
used with the EDS880/1 contains no sense line. To satisfy the circuit requirements of the 54eC, which is
designed for cables having sense lines, terminals TB1-3 and TB1-4 (RTD return and RTD sense) must be connected with a wire jumper. The wire jumper must be present. The analyzer displays the error message “sense
line open” if the jumper is absent.
Figure 2. Sensor Orientation
INSTALLATION
Keep 1/4 inch (0.6 cm) clearance between the electrodes and piping. The electrodes must be completely submerged in
the process liquid. See Figure, 2 for recommended orientation.
DO NOT TIGHTEN THE HEX NUT UNTIL THE SENSOR HAS BEEN PROPERLY POSITIONED. ONCE THE
NUT HAS BEEN TIGHTENED, NO FURTHER ADJUSTMENT OF THE SENSOR LENGTH IS POSSIBLE.
The sensor is provided with unterminated cable. To wire the connector, remove the screw holding the sensor plug to the
sensor, remove the plug , and a pry off the cover using a small screwdriver. There is a slot for the screwdriver in one
corner of the plug. Do not lose the gasket.
The terminals in the plug are numbered 1, 2, 3, and ground. The cable comprises two insulated conductors, a coaxial
conductor, and an overall braid. Wire the cable to the plug and 54eC analyzer as shown in the table.
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