Instruction manual

2
MODEL 5081-C SECTION 1.0
DESCRIPTION AND SPECIFICATIONS
1.2 SPECIFICATIONS
1.2.1 GENERAL SPECIFICATIONS
Housing: Cast aluminum with epoxy coating. NEMA 4X
(iP65). Neoprene o -ring cover seals.
Dimensions: 160.5 mm x 175.3 mm x 161.3 mm (6.3 in.
x 6.9 in. x 6.4 in.) See drawing.
Conduit Openings: ¾-in. FNPT
Ambient Temperature: -4 to 149°F (-20 to 65°C)
Storage Temperature: -22 to 176°F (-30 to 80°C)
Relative Humidity: 0 to 95% (non-condensing)
w eight/Shipping w eight: 10 lb/10 lb (4.5/5.0 kg)
Display: Two-line LCd ; first line shows process variable
(pH, o RP, conductivity, % concentration, oxygen,
ozone, or chlorine), second line shows process tem-
perature and output current. For pH/chlorine combina-
tion, the second line can be toggled to show pH. Fault
and warning messages, when triggered, alternate with
temperature and output readings.
First line: 7 segment LCd , 0.8 in. (20 mm) high.
Second line: 7 segment LCd , 0.3 in. (7mm) high.
d isplay board can be rotated 90 degrees clockwise or
counterclockwise.
d uring calibration and programming, messages and
prompts appear in the second line.
Temperature resolution: 0.1°C
Hazardous Location Approval: For details, see specifi-
cations for the measurement of interest.
RFI/EMI: EN-61326
Digital Communications:
HART —
Power & Load Requirements:
Supply voltage at the transmitter terminals should be at
least 12 Vdc. Power supply voltage should cover the volt-
age drop on the cable plus the external load resistor
required for HART communications (250 W minimum).
Minimum power supply voltage is 12 Vdc. Maximum
power supply voltage is 42.4 Vdc (30 Vdc for intrinsically
safe operation). The graph shows the supply voltage
required to maintain 12 Vdc (upper line) and 30 Vdc
(lower line) at the transmitter terminals when the current is
22 mA.
Analog Output: Two-wire, 4-20 mA output with superim-
posed HART digital signal. Fully scalable over the
operating range of the sensor.
Output accuracy: ±0.05 mA
FOUNDATION FIELDBUS —
Power & Load Requirements: A power supply voltage of
9-32 Vdc at 22 mA is required.
1.2.2 FUNCTIONAL SPECIFICATIONS
Calibration: Calibration is easily accomplished by
immersing the sensor in a known solution and enter-
ing its value or entering the cell constant for ultra pure
applications.
Automatic Temperature Compensation:
3-wire Pt 100 or Pt 1000 RTd
Conductivity: 0 to 200°C (32 to 392°F)
Resistivity: 0 to 100°C (32 to 212°F)
Low Conductivity: 0 to 100°C (32 to 212°F)
Diagnostics: The internal diagnostics can detect:
Calibration Error Zero Error
Temperature Slope Error Low Temperature Error
High Temperature Error Sensor Failure
Line Failure CPu Failure
Ro M Failure input Warning
o nce one of the above is diagnosed, the LCd will display
a message describing the failure/default detected.
Digital Communications:
HART: PV, SV, and TV assignable to measurement
(conductivity, resistivity, or concentration), tempera-
ture, and raw conductivity. Raw conductivity is meas-
ured conductivity before temperature correction.
Fieldbus: Three Ai blocks assignable to measurement
(conductivity, resistivity, or concentration), tempera-
ture, and raw conductivity. Raw conductivity is meas-
ured conductivity before temperature correction.
HART option