Model A. DIN Rail Strain Gage Conditioner. Installation and Operating Manual

Transcription

1 Model A DIN Rail Strain Gage Conditioner Installation and Operating Manual For assistance with the operation of this product, contact PCB Piezotronics, Inc. Toll-free: hour SensorLine: Fax: Web:

2 Warranty, Service, Repair, and Return Policies and Instructions The information contained in this document supersedes all similar information that may be found elsewhere in this manual. Total Customer Satisfaction PCB Piezotronics guarantees Total Customer Satisfaction. If, at any time, for any reason, you are not completely satisfied with any PCB product, PCB will repair, replace, or exchange it at no charge. You may also choose to have your purchase price refunded in lieu of the repair, replacement, or exchange of the product. Service Due to the sophisticated nature of the sensors and associated instrumentation provided by PCB Piezotronics, user servicing or repair is not recommended and, if attempted, may void the factory warranty. Routine maintenance, such as the cleaning of electrical connectors, housings, and mounting surfaces with solutions and techniques that will not harm the physical material of construction, is acceptable. Caution should be observed to insure that liquids are not permitted to migrate into devices that are not hermetically sealed. Such devices should only be wiped with a dampened cloth and never submerged or have liquids poured upon them. Repair In the event that equipment becomes damaged or ceases to operate, arrangements should be made to return the equipment to PCB Piezotronics for repair. User servicing or repair is not recommended and, if attempted, may void the factory warranty. Calibration Routine calibration of sensors and associated instrumentation is recommended as this helps build confidence in measurement accuracy and acquired data. Equipment calibration cycles are typically established by the users own quality regimen. When in doubt about a calibration cycle, a good rule of thumb is to recalibrate on an annual basis. It is also good practice to recalibrate after exposure to any severe temperature extreme, shock, load, or other environmental influence, or prior to any critical test. PCB Piezotronics maintains an ISO certified metrology laboratory and offers calibration services, which are accredited by A2LA to ISO/IEC 17025, with full traceablility to N.I.S.T. In addition to the normally supplied calibration, special testing is also available, such as: sensitivity at elevated or cryogenic temperatures, phase response, extended high or low frequency response, extended range, leak testing, hydrostatic pressure testing, and others. For information on standard recalibration services or special testing, contact your local PCB Piezotronics distributor, sales representative, or factory customer service representative. Returning Equipment Following these procedures will insure that your returned materials are handled in the most expedient manner. Before returning any equipment to PCB Piezotronics, contact your local distributor, sales representative, or factory customer service representative to obtain a Return

3 Materials Authorization (RMA) Number. This RMA number should be clearly marked on the outside of all package(s) and on the packing list(s) accompanying the shipment. A detailed account of the nature of the problem(s) being experienced with the equipment should also be included inside the package(s) containing any returned materials. A Purchase Order, included with the returned materials, will expedite the turn-around of serviced equipment. It is recommended to include authorization on the Purchase Order for PCB to proceed with any repairs, as long as they do not exceed 50% of the replacement cost of the returned item(s). PCB will provide a price quotation or replacement recommendation for any item whose repair costs would exceed 50% of replacement cost, or any item that is not economically feasible to repair. For routine calibration services, the Purchase Order should include authorization to proceed and return at current pricing, which can be obtained from a factory customer service representative. Warranty All equipment and repair services provided by PCB Piezotronics, Inc. are covered by a limited warranty against defective material and workmanship for a period of one year from date of original purchase. Contact PCB for a complete statement of our warranty. Expendable items, such as batteries and mounting hardware, are not covered by warranty. Mechanical damage to equipment due to improper use is not covered by warranty. Electronic circuitry failure caused by the introduction of unregulated or improper excitation power or electrostatic discharge is not covered by warranty. Contact Information International customers should direct all inquiries to their local distributor or sales office. A complete list of distributors and offices can be found at Customers within the United States may contact their local sales representative or a factory customer service representative. A complete list of sales representatives can be found at Toll-free telephone numbers for a factory customer service representative, in the division responsible for this product, can be found on the title page at the front of this manual. Our ship to address and general contact numbers are: PCB Piezotronics, Inc Walden Ave. Depew, NY USA Toll-free: (800) hour SensorLine SM : (716) Website: info@pcb.com DOCUMENT NUMBER: DOCUMENT REVISION: B ECN: 17900

4 8161 SERIES DIN RAIL AMPLIFIER MANUAL 1 Table of Contents Section Page 1.0 Description Power Connections Transducer Cabling Transducer Excitation Calibration Resistor Analog Outputs Calibration 3 Figures Figure Page 1 Jumper Locations 2 2 SW2 Switch Settings 4 3 Transducer Hookup 6 MANUAL NUMBER: MANUAL REVISION: C ECN NUMBER: 22218

5 8161 SERIES DIN RAIL AMPLIFIER MANUAL Description Series 8161 Signal Conditioner/Amplifier is designed for use with strain gage transducers that can operate with a DC excitation-amplification source. The 8161 series supplies either a 5 volt or a 10 volt transducer excitation, which can be selected through an internal jumper (see Figure 1). The 8161 series contains all necessary balancing, gain, and calibration controls and conditions/amplifies the applied input to a standard +/-5 or +/- 10 volt (jumper selectable, see Figure 1), and 4-20 ma analog output. Calibration of the instrument to the transducer is made through conventional a shunt technique using an internal calibration resistor. A front panel push button provides for calibration in the positive direction. 2.0 Power connection The 8161 series is designed to operate on a customer supplied DC power source with a voltage range of 12 to 28 volts. Screw terminals 1 and 2 are provided for power connections. Reference Figure Transducer cabling High quality twisted pair shielded cable with four conductors is recommended (such as Belden 8723) for transducer hook up. PCB can supply finished cables for transducers with either a PT02E-10-6P or PC04E-10-6P receptacles if desired. Reference Figure 3 for transducer hook up. 10vdc P1 5vdc Jumper P1 : Excitation Voltage P2 5vdc 10vdc Jumper P2 : Output Voltage Figure 1 - Jumper Locations

6 8161 SERIES DIN RAIL AMPLIFIER MANUAL Transducer excitation Either 5 volt or 10 volt bridge excitation can be selected (see Figure 1). In general, 5-volt excitation is used with 120Ω transducers, and the 10-volt excitation is used with 350Ω and 700Ω transducers. 5.0 Calibration Resistor If a fixed resistor is shunted across one arm of a strain gage bridge, it produces an imbalance equivalent to that of a particular value of mechanical input. If this Equivalent Input value is accurately known, it can be used as a reference point for shunt calibration of the system. Upon completion of installation of the transducer and its associated cabling, the user can: 1. Perform an overall deadweight calibration using a precisely known value of mechanical input. The calibration can then be transferred to the installed calibration resistor for convenience in checking later. 2. Replace the installed calibration resistor with one supplied by the transducer manufacturer, or an equivalent resistance value, to achieve a precisely known equivalent input, allowing the instrument sensitivity to be adjusted correctly. A 30K ohm resistor is installed at the factory and is used during final checkout of the instrument. It should be replaced with the proper value and accuracy for the transducer that it will be used with. The resistor is mounted internally on terminals located on the printed circuit board in the instrument. It can be reached by removing the cover. Note: Soldering is not required to remove or install the shunt calibration resistor. When amplifier is purchased with a specific sensor as a system, PCB will install the proper value shunt resistor in the amplifier. 6.0 Analog Outputs Two different analog outputs are available at the instrument terminal connections. Each output has a 1,000 Hz cutoff frequency. The voltage output of ± 5 volts or ± 10 5 ma (jumper selectable) is available between terminals 6 and 1. The current output of 4 to 20 ma is available between terminals 5 and Calibration This section contains the instructions for calibrating the Model 8161 series. To perform calibration, proceed as follows: 1. Set SW2 switches to appropriate mv/v setting. See location in Figure 2. 0 = Switch OFF, 1 = Switch ON

7 8161 SERIES DIN RAIL AMPLIFIER MANUAL 4 Sensitivity (mv/v) Sensitivity (mv/v) SW2- for 5V exc for 10V exc ON SW Figure 2 SW2 Switch Settings Example: Set: 2.5 mv/v transducer V EXC = 10 volts SW2-1 (Off) SW2-2 (Off) SW2-3 (On) SW2-4 (Off) 2. Hookup transducer as shown in Figure 3, then connect power supply. 3. Apply DC power (10 to 28 volts) to terminals 1 and 2 (see Figure 3). Allow 30 minutes of warm-up time for stabilization of transducer characteristics. 4. With the transducer unloaded, set the voltage output to ZERO using the coarse and fine zero controls. If the current output is to be used, set ZERO to 4 ma using the 4 ma adjust. 5. Load the transducer to a convenient up-scale value, which is greater than one half of full scale. Adjust the fine span control until the voltage output signal reading is equal to the dead weight value. Remove the dead weight, then press the RCAL switch and note the voltage reading obtained. This reading can now be used in future calibrations since it is related to a value obtained thru dead weight calibration. To calibrate the instrument in the future, simply press the CAL button and adjust the fine span control to obtain the reading previously recorded after dead weight calibration. If the current output is to be used, repeat the above step using the 20 ma adjust.

8 8161 SERIES DIN RAIL AMPLIFIER MANUAL 5 6. If dead weight calibration is not practical and the transducer manufacturer has supplied a calibration resistor (or resistor value), install the recommended calibration resistor. Now press the RCAL switch and adjust the voltage and/or current controls until the module output is equal to the Equivalent Input value simulated by the installed calibration resistor. 7. If dead weight calibration is not practical and the transducer-calibration data is unknown, the Equivalent Input value for the factory-installed calibration resistor can be approximated as follows, if the mv/v sensitivity rating of the transducer and the bridge resistance are known. Sample Calculation: X = ((25000 x Rb) / (K x Rc)) Where X = Equivalent Input (% of full scale) Rb = Bridge Resistance (ohms) K = Transducer sensitivity (mv/v, full scale) Rc = Calibration Resistance (ohms, 30k installed or proper value supplied with sensor) Assume that K = mv/v for a 10,000 pound capacity load cell (F.S.) with a bridge resistance of 350 ohms. X = ((25,000 x 350) / (3.000 x 30,000)) = 97.22% F.S. = 9,722 lbs.

9 8161 SERIES DIN RAIL AMPLIFIER MANUAL 6 V EXC (+) Sig (+) Sig (-) I OUT (4-20 ma) V OUT V EXC (-) Ground I OUT /V OUT Return V SUPPLY = VDC 1 - Ground 2 - V supply (10-28 VDC) Excitation Excitation 5 - I out (4-20 ma) 6 - V out (±5 or ±10 V) Signal 8 - +Signal Figure 3 Transducer Hook-up

10 Model Number A DIN RAIL STRAIN GAGE CONDITIONER Performance ENGLISH SI Frequency Range 1 khz 1 khz Non-Linearity ±0.01 % FS ±0.01 % FS Zero Adjust Range (Output 1) (course) ±60 % ±60 % Zero Adjust Range (fine) ±10 % ±10 % Span Adjust Range (Output 1) (course) ±0.05 to 5 mv/v ±0.05 to 5 mv/v Span Adjust Range (fine) ±20 % ±20 % 20 ma Adjust Range (Output 2) ±20 % ±20 % 4 ma Adjust Range (Output 2) ±10 % ±10 % Environmental Temperature Range +32 to +158 F 0 to +70 C Electrical Excitation (Max Current) 30 ma 30 ma Excitation Voltage (±.05 %) (Sensor) 10 VDC 10 VDC [1] Output 1 (Voltage) ±10 VDC ±10 VDC [1] Output 2 (Current) 4 to 20 ma 4 to 20 ma Power Required (Voltage) 12 to 28 Vdc 12 to 28 Vdc Power Required (Current) 60 ma 60 ma [2] Physical Size (Height x Width) 3.35 in x 0.69 in 89 mm x 18 mm Mounting 35 mm DIN Rail 35 mm DIN Rail Revision B ECN #: Optional Versions (Optional versions have identical specifications and accessories as listed for standard model except where noted below. More than one option maybe used.) Notes [1] Jumper selectable. [2] At full sensor load. All specifications are at room temperature unless otherwise specified. In the interest of constant product improvement, we reserve the right to change specifications without notice. ICP is a registered trademark of PCB group, Inc. Entered: AP Engineer: JSD Sales: KWW Approved: DA Spec Number: Date: Date: Date: Date: /14/ /14/ /14/ /14/2013 Company: PCB Load & Torque, Inc. Address: Indoplex Circle Farmington Hills, MI UNITED STATES Phone: Fax: ltinfo@pcbloadtorque.com Web site:

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