Product Description, General Specifications

Instruction Sheet	6081-P
LIQ_MAN_ABR_6081-P	October 2013

Product Description

When used with appropriate sensors, the 6081-P can measure pH or ORP (oxidation reduction potential) of a liquid and transmit data wirelessly with a radio transceiver which uses HART 7 communication protocol. The instrument has a local operator interface consisting of a keyboard and LCD display which can be used to observe process parameters or to configure the 6081. This instrument is available with approvals for use in hazardous areas.

General Specifications

Enclosure: Cast aluminum. NEMA 4X, IP66

Dimensions: 6.55” x 5.40” x 5.15” (166mm x 137mm x 131mm)

Conduit Openings: ¾” FNPT

Ambient Temperature: -4 to 149 °F (-20 to 65 °C)

Storage Temperature: -22 to 158 °F (-30 to 70 °C)

Relative Humidity: 0 to 95% (non-condensing)

Weight/Shipping Weight: 7 lbs/8 lbs (3.2/3.6 kg)

Digital Communications: HART 7 Wireless HART™

Functional Specifications

pH Range: 0 to 14

ORP Range: -1400 to +1400mV

Compatible with Rosemount Analytical SMART pH sensors

Calibrations/standardization: The automatic buffer recognition uses stored buffer values and their temperature curves for the most common buffer standards available worldwide. The transmitter also performs a stabilization check on the sensor in each buffer.

A manual two-point calibration is made by immersing the sensor in two different buffer solutions and entering the pH values. The microprocessor automatically calculates the slope which is used for self-diagnostics. An error message will be displayed if the pH sensor is faulty. This slope can be read on the display and/or manually adjusted if desired. An on- line one-point process standardization is accomplished by entering the pH or ORP value of a grab sample.

The following calibration methods are supported:

-Two point calibration with Low and High buffer (pH only)

-Two point calibration with Automatic Buffer recognition (pH only)

-Single point standardization

-Single point Temperature Adjustment

-Automatic calibration upon live connection to RAI SMART pH sensors and upload of stored cal data to transmitter

Automatic Temperature Compensation: External 3-wire Pt100 RTD or Pt1000 RTD located in the sensor, compensates the pH reading for temperature fluctuations. Compensation covers the range -10 to 150 °C (14 to 302 °F). Manual temperature compensation is also selectable.

Accuracy: ±1 mV @ 25 °C ±0.01 pH

Repeatability: ±1 mV @ 25 °C ±0.01 pH

Information and Status: Information screens display faults and warnings, radio transmission status, network ID number, Power Module voltage, transmitter model, and software version.

Diagnostics: The internal diagnostics can detect: RTD Failure

Glass Low Failure

Glass High Failure

Broken Glass Fault

Reference High Failure

CPU Error

High Temperature Warning

Low Temperature Warning

Glass Impedance High Warning

Glass Impedance Low Warning

Reference Impedance High Warning