MODEL DA-05L TRANSDUCER AMPLIFIER (low-gain version) 2080 Arlingate Lane, Columbus, Ohio 43228 • (614) 850-5000 Sensotec, Inc. 2080 Arlingate Lane Columbus, Ohio 43228 Copyright 1995 by Sensotec, Inc. all rights reserved Telephone: (614) 850-5000 FAX: (614) 850-1111 Toll Free: 1-800-848-6564 E-mail: [email protected] WWW: http://www.sensotec.com Model DA-05L Transducer Amplifer, (3-wire Current Model, low-gain version) Sensotec Part Number: 008-0623-00 Rev. -: October, 2001 IMPORTANT! IT IS RECOMMENDED THAT YOU READ THIS DOCUMENT THOROUGHLY BEFORE APPLYING POWER TO THIS UNIT. THIS DOCUMENT CONTAINS INFORMATION ON WIRING, CALIBRATION, AND USE OF FEATURES. Chapter 1 INTRODUCTION 1.1 Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 1.2 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 1.3 Layout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 Chapter 2 INSTALLATION / SETUP 2.1 Mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 2.2 Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 2.3 Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 Chapter 3 CALIBRATION 3.1 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 3.2 Using Shunt Calibration . . . . . . . . . . . . . . . . . . 3-1 Chapter 4 WARRANTY / REPAIR POLICY 4.1 Limited Warranty on Products . . . . . . . . . . . . . 4.2 Service Under Warranty . . . . . . . . . . . . . . . . . . 4.3 Non-Warranty Service . . . . . . . . . . . . . . . . . . . 4.4 Repair Warranty . . . . . . . . . . . . . . . . . . . . . . . . 4-1 4-1 4-2 4-2 Chapter 1 INTRODUCTION 1.1 Overview The Sensotec Model DA-05L Transducer Amplifier features 35mm DIN-rail mounting and connects between the transducer and a readout instrument. The amplifier supplies a highly regulated bridge excitation voltage for the transducer and converts the millivolt signal of the transducer to a 4-20mA signal. The amplifier also features two selectable excitation voltages, programmable gain settings, a wide adjustment range on the zero and a buffered solid-state shunt cal relay for quick calibration. 008-0623-00 page 1-1 1.2 Specifications Power Requirements: 13.5 - 28 volts DC Bridge Excitation: 5 or 3 volts DC @ 30 mA (user selectable) Output Voltage Range: 4-20 mA Frequency Response: DC - 5000 Hz Zero Balance Range: +/- 60% coarse, +/- 10% fine adjustment range Gain Adjustment Range: Switch selectable (5 to 133 mV/V), +/- 20% fine adjust Short Circuit Protection: (+)Output to (-)Output Enclosure Style: 35mm DIN rail mounting Enclosure Size: 22.5mm x 75mm x 98.5mm (0.886” x 2.953” x 3.878”) Shunt Calibration: Solid-state relay Long Term Zero Drift: .1% of Full Scale per 6 months page 1-2 Model DA-05L Transducer Amplifier Figure 1-1: Load/power Curve for 4-20mA Output 008-0623-00 page 1-3 1.3 Layout Figure 1-2: Layout and Wiring of Model DA-05L Transducer Amplifier page 1-4 Model DA-05L Transducer Amplifier Chapter 2 INSTALLATION / SETUP 2.1 Mounting The Model DA-05L Transducer Amplifier snaps onto standard 35mm DIN rails. One side of the enclosure is slotted and the other is unslotted. Hook the unslotted side of the enclosure onto the rail, then press the slotted side firmly until it snaps onto the rail. To remove the enclosure from the DIN rail, place a small flat-bladed screwdriver in the slot and turn it slightly. This releases the rail clamp, and the enclosure may be removed. 2.2 Wiring The amplifier should be wired according to Figure 1-2. Install a shunt cal resistor with the value specified on the transducer data sheet. 2.3 Setup Use the following procedure for setting up the excitation and the coarse gain: 1. Determine the EXCITATION VOLTAGE required by the transducer being used. 2. Set the EXCITATION SELECT JUMPER as shown in Figure 2-1. This requires removing the circuit board from the enclosure. The Amplifier usually is set at the factory for 5 VDC excitation. 3. Determine the sensitivity of the transducer in mV/V from the transducer calibration sheet. 4. Set the COARSE GAIN SWITCH (See Fig.2-1 for location of switch) to the nearest mV/V setting in the corresponding excitation column in Table 1. 008-0623-00 page 2-1 Figure 2-1: View of Circuit Board page 2-2 Model DA-05L Transducer Amplifier Table 1: Coarse Gain Setup SWITCH POSITION ON EXCITATION (VDC) 5 3 1, 2, 3, 7 5 mV/V 8.33 mV/V 1, 3, 7 7.5 mV/V 12.5 mV/V 1 10 mV/V 16.67 mV/V 3, 5, 7 15 mV/V 25 mV/V 2 20 mV/V 33 mV/V 4, 7 25 mV/V 41.6 mV/V 3 30 mV/V 50 mV/V 6, 8 35 mV/V 58 mV/V 4 40 mV/V 66.6 mV/V 5 50 mV/V 83.8 mV/V 6 60 mV/V 100 mV/V 7 70 mV/V 116 mV/V 8 80 mV/V 133 mV/V 008-0623-00 page 2-3 page 2-4 Model DA-05L Transducer Amplifier Chapter 3 CALIBRATION 3.1 Calibration Step 1. Apply power and allow unit to stabilize for 10 minutes. Step 2. With zero load or pressure on the transducer, adjust the ZERO potentiometers to indicate zero on the readout instrument or voltmeter connected to the output. Step 3. Apply full scale pressure or load to the transducer and adjust the SPAN potentiometer to indicate full scale on the readout instrument or voltmeter. Step 4. Re-check zero and full scale (repeat steps 2 & 3). 3.2 Using Shunt Calibration Sensotec transducers feature a calibration technique called shunt calibration. This method applies a known resistance across one leg of the transducer, which simulates an output as if a load or pressure was applied to the transducer. When performing shunt calibration, the transducer should be at ZERO pressure or load. The full scale output and shunt cal output is found on the TRANSDUCER CALIBRATION SHEET. This information can be used to calibrate the amplifier’s output voltage and the readout’s display with the following equations: 008-0623-00 page 3-1 TRANSDUCER CALIBRATION DATA Full Scale Output = ____________ mV/V. Shunt Resistor Value of ____________ Ohms Shunt Cal Output = ____________ mV/V. FORMULA TO CALCULATE OUTPUT CURRENT [ [ SHUNT CAL OUTPUT X FULL SCALE OUTPUT __________________ FULL SCALE CURRENT X ___16mA___ ] ] 4mA = OUTPUT CURRENT 4mA = ________________ + + FORMULA TO CALCULATE DISPLAY UNITS SHUNT CAL OUTPUT FULL SCALE OUTPUT X FULL SCALE UNITS = DISPLAY UNITS __________________ X ________________ = _____________ Step 1. Apply power and allow the amplifier to warm up. Step 2. With zero load or pressure on the transducer, adjust the ZERO potentiometer to indicate zero on the readout instrument. Step 3. Connect a jumper (or close a switch) across the (+)Shunt Cal and (-)Shunt Cal terminals as shown in page 3-2 Model DA-05L Transducer Amplifier the figure below. Adjust the SPAN potentiometer to the calculated voltage or calculated units on the readout instrument. Step 4. Disconnect the shunt cal jumper (or release the shunt cal switch) and repeat steps 2 & 3 if needed. Figure 3-1: Shunt Cal Wiring Example 008-0623-00 page 3-3 page 3-4 Model DA-05L Transducer Amplifier Chapter 4 WARRANTY / REPAIR POLICY 4.1 Limited Warranty on Products Any of our products which, under normal operating conditions, proves defective in material in workmanship within one year from the date of shipment by SENSOTEC, will be repaired or replaced free of charge provided that you obtain a return material authorization from SENSOTEC and send the defective product, transportation charges prepaid with notice of the defect, and establish that the product has been properly installed, maintained, and operated within the limits of rated and normal usage. Replacement product will be shipped F.O.B. our plant. The terms of this warranty do not extend to any product or part thereof which, under normal usage, has an inherently shorter useful life than one year. The replacement warranty detailed here is the buyer's exclusive remedy, and will satisfy all obligations of SENSOTEC whether based on contract, negligence, or otherwise. SENSOTEC is not responsible for any incidental or consequential loss or damage which might result from a failure of any SENSOTEC product. This express warranty is made in lieu of any and all other warranties, express or implied, including implied warranty of merchantability or fitness for particular purpose. Any unauthorized disassembly or attempt to repair voids this warranty. 4.2 Service Under Warranty Advanced authorization is required prior to the return to SENSOTEC. Before returning the items, either write to the Customer Service Department c/o SENSOTEC, Inc., 2080 Arlingate Lane, Columbus, Ohio 43228, or call (800) 848-6564 with: 1) a part number; 2) a serial number for the defective product; 3) a technical description* of the defect; 4) a no-charge purchase order number (so products can be returned to you correctly); and 5) ship and bill addresses. Shipment to SENSOTEC shall be at Buyer's expense and repaired or replacement items will be shipped F.O.B. our plant in Columbus, Ohio. Nonverified problems or defects may be subject to an evaluation charge. Please return the original calibration data with the unit. 008-00623-00 page 4-1 4.3 Non-Warranty Service Advance authorization is required prior to the return to SENSOTEC. Before returning the item, either write to the Customer Service Department c/o SENSOTEC, Inc., 2080 Arlingate Lane, Columbus, Ohio 43228, or call (800) 848-6564 with: 1) a model number; 2) a serial number for the defective product; 3) a technical description* of the malfunction; 4) a purchase order number to cover SENSOTEC's repair cost; and 5) ship and bill addresses. After the product is evaluated by SENSOTEC, we will contact you to provide the estimated repair costs before proceeding. Shipment to SENSOTEC shall be at Buyer's expense and repaired items will be shipped to you F.O.B., our plant in Columbus, Ohio. Please return the original calibration data with the unit. 4.4 Repair Warranty All repairs of SENSOTEC products are warranted for a period of 90 days from date of shipment. This warranty applies only to those items which were found defective and repaired, it does not apply to products in which no defect was found and returned as is or merely recalibrated. Out of warranty products may not be capable of being returned to the exact original specifications or dimensions. * Technical description of the defect: In order to properly repair a product, it is necessary for SENSOTEC to receive information specifying the reason the product is being returned. Specific test data, written observations on the failure and the specific corrective action you require is needed. page 4-2 Model DA-05L Transducer Amplifier