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Instruction Manual
PN 51-3081pH/rev.D
August 2002
Model 3081 pH/ORP
Smart Two-Wire Microprocessor Transmitter
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ESSENTIAL INSTRUCTIONS READ THIS PAGE BEFORE PROCEEDING! Rosemount Analytical designs, manufactures, and tests its products to meet many national and international standards. Because these instruments are sophisticated technical products, you must properly install, use, and maintain them to ensure they continue to operate within their normal specifications. The following instructions must be adhered to and integrated into your safety program when installing, using, and maintaining Rosemount Anal
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WHAT YOU NEED TO KNOW BEFORE INSTALLING AND WIRING A ROSEMOUNT ANALYTICAL SENSOR TO THE MODEL 3081 pH/ORP TRANSMITTER 1. THE MODEL NUMBER OF THE SENSOR • Look on the label. • Also note the model option string. • If the label is missing or unreadable, see the flowcharts on pages 28 through 30. Write the sensor model number here 2. THE TYPE OF TEMPERATURE ELEMENT • Look on the label. • If the label is missing or unreadable, measure the resistance between the RTD leads. Write the temperature el
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• If the sensor is wired directly to the transmitter, the preamplifier can be in either the sensor or the transmitter. • Look at the wires in the sensor cable. A GREEN wire means the preamplifier is in the sen- sor. An coaxial cable means the preamplifier is in the transmitter. A coaxial cable is an insulated wire surrounded by a braided metal shield. The wire terminates in either a BNC connector or an ORANGE wire with a CLEAR shield. Write the preamplifier location here CAN YOU USE THE QUICK S
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QUICK START GUIDE FOR MODEL 3081pH/ORP Before using this Quick Start Guide, please read “WHAT YOU NEED TO KNOW BEFORE INSTALLING AND WIRING A ROSEMOUNT ANALYTICAL SENSOR TO THE MODEL 3081 pH/ORP TRANSMITTER” on the preceding page. Section 1.1 Setup for the Models 381+-52, 385+-04, 396P-02-54, 396P-02-55 and 396R-54 without a junction box A. The factory setting of the preamplifier switch is in the appropriate location, so no adjustment is necessary. B. Mount the transmitter in the desired loca
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Section 2 Wiring A. Wire sensor Model 381+-55, 385+-03, or 396P-01-55 directly to the transmitter as shown in Figure 3. B. Wire sensor Model 381+-52, 385+-04, 396P-02-55, 396P-02-55, or 396R-54 as shown in Figure 4. C. Wire the 12 - 42.4 Vdc power supply to TB-15 (- 4 - 20 mA) and TB-16 (+ 4 - 20 mA). FIGURE 3 FIGURE 4 NOTES: 1. INSTRUMENT JUMPER SUPPLIED BY CUSTOMER. 2. DO NOT CONNECT BLUE WIRE INSIDE TRANSMITTER. INSULATE STRIPPED END OF BLUE WIRE. Section 3 Power up and Calibration A.
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QUICK REFERENCE GUIDE MODEL 3081PH/ORP Automatic Buffer Calibration Note: A pH measurement is only as good as the calibration, and the calibration is only as good as the buffers used. For best results, calibrate with buffers having the same temperature as the process. Allow time for the sensor and buffers to reach the same temperature. If the process temperature is more than 10°C different from the buffer, allow at least 20 minutes. Be careful using buffers at high temperatures. The pH of many
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HART Communicator Fast Key Sequences Buffer Calibration Toggle Hold Mode View pH value 23 1 1 25 11 1 Standardize pH Upper Range Value View Analog Output 23 2 1 32 2 12 Trim Analog Output pH Lower Range Value View Transmitter Status 24 32 1 13 PROGRAM DIAGNOSE CALIBRATE tEMP AdJ CALIbrAtE Std tEMP 25.0 CAL bF1 Std 7.00 InPut 58.9 GIMP 1000 rIMP 10 V Er 81PH.21 tEMP 25 C ShoW FLt SLOPE 59.01 bF 1 nonE bF1 4.01 CAL bF2 OutPut dIAGnOStIC tEMP dISPLAY bUFFEr ISOPOtntAL SIM OUtPUt bF 2 4 MA 00.00 r
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MODEL 3081 pH/ORP TABLE OF CONTENTS MODEL 3081 PH/ORP MICROPROCESSOR TRANSMITTER TABLE OF CONTENTS Section Title Page 1.0 DESCRIPTION AND SPECIFICATIONS ................................................................ 1 1.1 Features................................................................................................................... 1 1.2 Accessories.............................................................................................................. 2 1.3 Specifications - G
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MODEL 3081 pH/ORP TABLE OF CONTENTS TABLE OF CONTENTS CONT’D 8.0 PROGRAMMING FOR pH MEASUREMENTS....................................................... 56 8.1 General .................................................................................................................... 56 8.2 Entering and Leaving the Program Menu ................................................................ 56 8.3 Output Ranging.....................................................................................
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MODEL 3081 pH/ORP TABLE OF CONTENTS TABLE OF CONTENTS CONT’D 13.0 pH MEASUREMENTS............................................................................................. 114 13.1 General .................................................................................................................... 114 13.2 Measuring Electrode................................................................................................ 115 13.3 Reference Electrode .....................................
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MODEL 3081 pH/ORP TABLE OF CONTENTS TABLE OF CONTENTS CONT’D LIST OF FIGURES Number Title Page 2-1 Model 3081 pH/ORP Transmitter - Exploded Drawing of Circuit Board Stack ......... 8 2-2 Model 3081 pH/ORP Transmitter - Analog Board .................................................... 9 2-3 Model 3081 pH/ORP Transmitter - CPU Board........................................................ 10 2-4 Mounting the Model 3081 pH/ORP Transmitter on a Flat Surface ........................... 11 2-5 Using th
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MODEL 3081 pH/ORP TABLE OF CONTENTS TABLE OF CONTENTS - CONT’D LIST OF FIGURES - CONT’D Number Title Page 3-23 Procedure for Removing BNC Connector and Preparing Coaxial Cable for ............ Connection to the Model 3081 pH/ORP Transmitter ................................................ 26 3-24 Preparation of Raw Connecting Cable (PN 9200273).............................................. 27 4-1 Intrinsically Safe BASEEFA Model 3081 pH/ORP Label .......................................... 31 4-2
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MODEL 3081 pH/ORP TABLE OF CONTENTS TABLE OF CONTENTS CONT’D LIST OF TABLES Number Title Page 3-1 Wiring Diagrams for Model 399 Sensors.................................................................. 15 3-2 Wiring Diagrams for Model 397 Sensors.................................................................. 15 3-3 Wiring Diagrams for Model 396R Sensors ............................................................... 15 3-4 Wiring Diagrams for Model 396P Sensors ...............................
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MODEL 3081 pH/ORP SECTION 1.0 DESCRIPTION AND SPECIFICATIONS SECTION 1.0 DESCRIPTION AND SPECIFICATIONS 1.1 Features 1.2 Accessories 1.3 Specifications - General for Model 3081 pH/ORP 1.4 Specifications - pH 1.5 Specifications - ORP 1.6 Ordering Information • CHANGING FROM pH TO ORP operation takes only seconds. • REMOTE COMMUNICATION IS SIMPLE; use the hand-held infrared remote controller or any HART® compatible device. • LARGE TWO LINE DISPLAY shows pH or ORP, temperature, and output signal. •
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MODEL 3081 pH/ORP SECTION 1.0 DESCRIPTION AND SPECIFICATIONS CALIBRATION: Two-point, temperature-corrected buffer 1.2 ACCESSORIES calibration is standard. To reduce errors caused by 1.2.1 Power Supply. Use the Model 515 Power Supply impatient operators, the Model 3081 pH/ORP transmitter to provide the dc loop power required by the Model 3081 does not accept calibration data until programmed stabil- pH/ORP transmitter. The Model 515 provides either a ity limits have been met. If data are not acce
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MODEL 3081 pH/ORP SECTION 1.0 DESCRIPTION AND SPECIFICATIONS 1.3 SPECIFICATIONS -GENERAL FOR MODEL 3081 pH/ORP Security: User selected security code prevents Case: Cast aluminum containing less than 8% magnesium. accidental changes to program settings. NEMA 4X (IP65), NEMA 7 (explosion-proof) Ambient Temperature: -4 to 149°F (-20 to 65°C) Epoxy-polyester paint, Neoprene O-ring seals Relative Humidity: 0 to 95% (with covers sealed) Dimensions: 6.3 in. x 6.9 in. x 6.4 in. (160 mm x 175 mm x Stora
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MODEL 3081 pH/ORP SECTION 1.0 DESCRIPTION AND SPECIFICATIONS 1.4 SPECIFICATIONS - pH 1.5 SPECIFICATIONS - ORP pH Input Range: 0 to 14 pH ORP Input Range: -1400 to 1400 mV Temperature Input Range: 5°F to 248°F (-15°C to 120°C) Temperature Input Range: 5°F to 248°F (-15°C to 120°C) Output Scale Expansion: Continuously expandable Output Scale Expansion: Continuously expandable between pH 0 and 14 between -1400 and 1400 mV Accuracy at 25°C: ±0.01 pH Accuracy at 25°C: ±1 mV Repeatability at 25°C: ±0.
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MODEL 3081 pH/ORP SECTION 1.0 DESCRIPTION AND SPECIFICATIONS MODEL 3081 pH/ORP TRANSMITTER-SENSOR COMPATIBILITY CHART PREAMPLIFIER LOCATION Sensor-mounted Remote MODEL pH ORP Sensor junction box junction box Transmitter 320B x see note 320HP x see note x 330B x 328A x x x 370 x x x x 371 x x x x 381pH x 381pHE x 381 x 381+ x x x x 385 x x x x 385+ x x x x x x 389 x x x x 396 x x x 396P x x x x x 396R x x x x x 397 x x x 398 x x x x 398R x x x x x 399 x x x x 399-33 x x GP1 x x x x NOTE: Preampl
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MODEL 3081 pH/ORP SECTION 1.0 DESCRIPTION AND SPECIFICATIONS ACCESSORIES MODEL/PN DESCRIPTION SHIPPING WEIGHT 515 DC loop power supply, see Section 1.2.1 for details 3 lb/1.0 kg 230A Two alarm module, see Section 1.2.2 for details 3 lb/1.5 kg 275 HART communicator, order from Rosemount Measurement - (800) 999-9307 NA 23572-00 Infrared remote controller, includes two 1.5 V AAA alkaline batteries 1 lb/0.5 kg 23555-00 Remote junction box, includes preamplifier (PN 23557-00), 10 terminals on 2 lb/1.
