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User’s Guide
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omega.com
®
OMEGA
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e-mail: info@omega.com
TX82B
Panel Mounted
Current Loop Indicator
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® ® ® OMEGAnet On-Line Service Internet e-mail www.omega.com info@omega.com Servicing North America: USA: One Omega Drive, P.O. Box 4047 ISO 9001 Certified Stamford CT 06907-0047 TEL: (203) 359-1660 FAX: (203) 359-7700 e-mail: info@omega.com Canada: 976 Bergar Laval (Quebec) H7L 5A1 TEL: (514) 856-6928 FAX: (514) 856-6886 e-mail: info@omega.ca For immediate technical or application assistance: ® USA and Canada:
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TABLE OF CONTENTS 1.0 GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2.0 SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 2.1 Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 2.2 Accuracy at 25°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 2.3
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UNPACKING INSTRUCTIONS Remove the Packing List and verify that you have received all equipment, including the following: QTY DESCRIPTION 1 Current Loop Meter Indicator with all applicable connnectors attached. 1 Owner's Manual 1 Factory Setup Label If you have any questions about the shipment, use the phone number for the Customer Service Department nearest you. When you receive the shipment, inspect the container and equipment for signs of damage. Note any evidence of rough handling in transit.
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1.0 GENERAL INFORMATION Model TX82B two-wire current-loop indicator accepts 1-5 mA, 4-20 mA, or 10-50 mA process signals and digitally displays the process variable in percentage or engineering units of such measurements as pressure, flow, temperature and level. No separate power supply or power connections are required, since the TX82B obtains operating power directly from the current loop with a voltage drop of less than 2.5 V. It can tolerate current overdrives up to 200 mA forward and 1000 m
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2.0 SPECIFICATIONS 2.1 INPUT Current 1-5 mA, 4-20 mA or 10-50 mA Protection 200 mA max forward and 1000 mA max reverse Voltage Drop 2.5 V max forward and 1.2 V max reverse Span Range 100 to 2000 counts continuous adjustment with a multiturn potentiometer Zero Range The multiturn zero potentiometer can displace the displayed reading by ±500 counts from the center of each of the four overlapping zero ranges, provided that the resultant is within the ±1999 count display capability. Span Slope Posit
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2.4 DISPLAY Type 7-segment LCD Color Black digits with white background Symbols -1.8.8.8.0.0, 12.7 mm (0.5 in) height Polarity Minus sign Overrange Three least-significant digits blank Extra digits One or two dummy right-hand zeros, jumper-selectable Decimal points Four positions, jumper-selectable Lifetime (to 2:1 contrast ratio) More than 30,000 hours Temperature derating 2:1 for each 10°C above 60°C Humidity derating 2:1 for each 10%RH above 60%RH 2.5 ENVIRONMENT Standard operating temp 0 to
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3.0 MECHANICAL ASSEMBLY AND INSTALLATION 3.1 SAFETY CONSIDERATIONS To ensure safe operation, follow the guidelines below: VISUAL INSPECTION: Do not attempt to operate the instrument if damage is found. SIGNAL WIRING: Insert the proper plus and minus signal wires into the plug-in screw-clamp connector terminals marked plus and minus. Ensure that the wires are securely clamped in the plug-in connector by rotating the screws in the plug–in connector clockwise but do not exceed a torque of .5 newton
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3.3 INSTALLATION/REMOVAL The TX82B is housed in a 1/8 DIN case. The electronic circuitry can be installed or removed from the front and is attached to the case with two M4 screws through the rear panel. Panel Mounting 1. Remove the two thumbnuts on the rear of the case. 2. Slide the sleeve off the case (see Figure 3-1 Exploded View). 3. Verify the panel cutout dimensions in Figure 3-2 Case Dimensions. Insert the case in the panel cutout from the front and slide the sleeve on from the rear. Insta
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1.89 [48.0] 3.78 [96.0] 7.9 [0.31] MAX CASE 3.50 [88.9] 4.15 [105.4] SLEEVE TOP VIEW SIDE VIEW PANEL THICKNESS: 0.25 [6.4] MAX 0.03 [0.8] MIN 0.06 R 1.772 +.024/-.000 [1.5] [45.00 +0.61/-0.00] 4 PLCS 3.622 +.032/-.000 [92.00 +0.81/-0.00] PANEL CUT-OUT NOTES: DIMENSIONS ARE IN INCHES [MILLIMETERS]. Figure 3-2. DIN Case Dimensions 4.0 SIGNAL INPUT CONNECTIONS (P3) The signal input connections for all meters are made at connector P3 as follows (see Figure 3-1): P3 Connection Signal 1 Signal Hi 2 S
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5.0 CONFIGURATION The standard TX82B meter is factory-configured for an input of 4-20 mA to display 00.0 to 100.0. Field configuration for input current range, decimal point location, dummy right-hand zero digit, coarse zero range selection, and reverse span slope may be done by relocating internal push-on jumpers and adjusting the span and zero potentiometers. Refer to Figure 5-1 for the span and zero potentiometers and internal jumper locations. 5.1 STANDARD SETUP Unless the customized configu
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D F C BJ E G S1 A H R4 SPAN ADJ. U2 U3 S1 P3 S2 VR1 ZERO ADJ. VR2 R30 B AH J F C D G S2 E Figure 5-1 Main Board Jumper Locations 8
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6.0 CUSTOMER CONFIGURATION AND CALIBRATION Use this procedure to determine the configuration of the TX82B customized setup. The procedure is general; customers can specify any two current inputs and their corresponding digital readings. Pin-groups are shown in Figure 5-1. 6.1 FORMULA Base all your calculations on either the 1-5, 4-20 or 10-50 mA range. 1. Determine the lowest input current, I1, which is specified by the customer: I1 = mA 2. Determine the highest input current, I2, which is speci
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6.2 CONFIGURATION PROCEDURES 1. Remove all push-on jumpers. 2. For an input current range of 1-5 mA, no jumper is required. For 4-20 mA input, install a push-on jumper at S1-H. For 10-50 mA input, install a push-on jumper at S1-J. 3. If N2 (Section 6.1) is less than N1, reverse the signal polarity by removing jumpers from S1-B and S1-C and reinstalling jumpers at S1-A and S1-D. 4. Select the zero range required (ZR1-4) and install the push-on jumper as indicated in the configuration chart (Sect
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7.0 WIRING DIAGRAM HAZARDOUS AREA SAFE AREA 3 4 MODEL + SHUNT ZENER SAFE AREA TX82B DIODE APPARATUS SAFETY INDICATOR - BARRIER INTER- CONNECTING 1 2 CABLES EARTHED BUS BAR NOTES: 1 Apparatus which is unspecified except that it must not be supplied from nor contain under normal or abnormal conditions a source of potential with respect to Earth in excess of 250V R.M.S. or 250V D.C. 2 The following output parameters apply; Vmax=12.5V, Imax=250mA, Ci=8.6uF, Li=0mH 3 The Interconnecting Cable ma
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WARRANTY/DISCLAIMER OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanship for a period of 13 months from date of purchase. OMEGA Warranty adds an additional one (1) month grace period to the normal one (1) year product warranty to cover handling and shipping time. This ensures that OMEGA’s customers receive maximum coverage on each product. If the unit should malfunction, it must be returned to the factory for evaluation. OMEGA’s Customer Service Departme
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Where Do I Find Everything I Need for Process Measurement and Control? OMEGA…Of Course! Shop on line at www.omega.com TEMPERATURE Thermocouple, RTD & Thermistor Probes, Connectors, Panels & Assemblies Wire: Thermocouple, RTD & Thermistor Calibrators & Ice Point References Recorders, Controllers & Process Monitors Infrared Pyrometers PRESSURE, STRAIN AND FORCE Transducers & Strain Gauges Load Cells & Pressure Gauges Displacement Transducers Instrumentation &
