E-64-A (for c. bentley):E-64-A 8/17/10 10:40 AM Page 1 Bulletin E-64-A-1 Series 604A Differential Pressure Transmitter Specifications - Installation and Operating Instructions 3-19/32 [91.28] 1-3/16 2-3/16 13/32 [30.16] [55.56] [10.32] R 2-3/16 1-3/4 [55.56] [44.45] 2-5/8 [66.68] (2) Ø13/64 [5.16] 1/4 MOUNTING HOLES [6.35] 7/16 1-13/16 15/32 [11.11] [46.03] [11.91] Patent No. 301,018 The Dwyer Series 604A Differential Pressure Transmitter SPECIFICATIONS converts air or compatible gas pressure into a standard 4-20 mA Service: Air and non-combustible, compatible gases. output signal for pressure ranges from 0-0.4” up to 0-120˝ w.c. Wetted Materials: Consult factory. (0-2.54 mm up to 0-304.9 mm w.c.). Each of these models Accuracy: ±2% of full span output (Includes linearity, overlap in range so that any range within these limits can be hysteresis and repeatability). achieved by adjustment of the span and zero controls. Versatile Stability: ±1% F.S./yr. circuit design enables use in 2, 3 or 4-wire current loops. Temperature Limits: 0 to 140°F (-17.8 to 60°C). Compensated Temperature Limits: 20 to 120°F (-6.67 to Positive, negative or differential pressures can be measured 48.9°C). within an accuracy of ±2% of span. The Series 604A uses an Pressure Limits: 2 psig for models 604A-0, 604A-1; 11 psig isolated piezoresistive pressure sensor to produce a resistance for models 604A-2, 604A-3. change across a wheatstone bridge. The signal is conditioned Thermal Effect: ±0.025% F.S./°F (0.045% F.S./°C). and converted into a 4-20 mA output signal. Power Requirements: 10-35 VDC (2-wire*). Output Signal: 4 to 20 mA. For applications requiring direct pressure or percent of full span Zero and Span Adjustments: Internally accessible readings, the optional A-701 digital readout makes an ideal Potentiometers. companion device. It provides a bright .6˝ (15.3 mm) high, 3-1/2 Loop Resistance: DC; 0-1250 ohms maximum. digit, LED display while also supplying power to the Series 604A Current Consumption: DC; 38 mA maximum. Transmitter. Electrical Connections: Terminal block. Process Connections: Barbed, for 3/16˝ (4.76 mm) I.D. tubing. Mounting Orientation: Diaphragm in vertical position. Consult factory for other position orientations. RANGES IN INCHES OF WATER Weight: 5.6 oz (159 g). Model As Stocked Min. Range Max.Range Agency Approvals: CE. 604A-0 0-0.5 (0-12.7 mm) 0-0.4 (0-10.1 mm) 0-1.0 (0-25.4 mm) 604A-1 0-2.0 (0-50.8 mm) 0-0.5 (0-12.7 mm) 0-4.0 (0-101.6 mm) 604A-2 0-10 (0-254 mm) 0-2.0 (0-50.8 mm) 0-20 (0-50.8 cm) 604A-3 0-50 (0-127 cm) 0-15 (0-381 mm) 0-120 (0-305 cm) DWYER INSTRUMENTS, INC. Phone: 219/879-8000 www.dwyer-inst.com P.O. BOX 373 • MICHIGAN CITY, INDIANA 46361, U.S.A. Fax: 219/872-9057 e-mail: info@dwyer-inst.com E-64-A (for c. bentley):E-64-A 8/17/10 10:40 AM Page 2 INSTALLATION Wire Length - The maximum length of wire connecting LOCATION: Select a location where temperature of the unit will transmitter and receiver is a function of wire size and receiver be between 20°F and 120°F (7°C and 49°C). Distance from the resistance. Wiring should not contribute more than 10% of receiver is limited only by total loop resistance. See “Electrical receiver resistance to total loop resistance. For extremely long Connections.” The tubing feeding pressure to the instrument can runs (over 1000 ft. [305 m]), choose receivers with higher be run practically any length required, but long lengths will resistances to minimize size and cost of connecting leads. slightly increase response time. Avoid surfaces with excessive Where wiring length is under 100 ft. (30.48 m), lead wire as small vibration. as 22 AWG can be used. POSITION: The Model 604A-0 must be mounted and operated 2-Wire Operation - An external power supply delivering 13-35 only in a vertical position due to its sensitivity to gravitational VDC with minimum current capability of 40 mA DC (per forces. Higher range models will perform properly at other transmitter) must be used to power the control loop. See Fig. C angles, but they must be spanned and zeroed in the position in for connection of the power supply, transmitter and receiver. which they will be used. The minimum and maximum ranges Note the jumper between terminals 3 and 4. The range of possible may shift depending upon degree of tilt. appropriate receiver load resistance (RL) for the DC power supply voltage available is expressed by the formula and graph PRESSURE CONNECTIONS: Two barbed connectors are in Fig. F. Shielded two wire cable is recommended for control provided for use with 3/16˝ I.D. vinyl or rubber tubing. Attach loop wiring. If grounding is required use negative side of control tubing from positive pressure source to HI port. Leave LO port loop after receiver. In Fig.C below, if power supply lead to vented. For negative (vacuum) pressure, connect to LO port and terminal 1 is positive, ground should be connected to wiring at leave HI port vented. For differential pressures, connect the right of receiver. Otherwise, in 2 wire operation it is not higher to HI port and lower to LO port. necessary to observe polarity of control loop connections. MOUNTING: Attach the Series 604A Transmitter to a vertical 2-WIRE CONNECTION surface using the #10 x 1˝ pan head sheet metal screws provided. Mounting holes are located in upper left and lower right corners of case. SERIES 604A POWER PRESSURE SUPPLY RECEIVER TRANSMITTER 13-35 VDC JUMPER ELECTRICAL CONNECTIONS WIRE CAUTION: DO NOT EXCEED SPECIFIED SUPPLY VOLTAGE Fig. C RATINGS. PERMANENT DAMAGE NOT COVERED BY WARRANTY WILL RESULT. THIS UNIT IS NOT DESIGNED FOR 120 VAC or 240 VAC LINE OPERATION. 3-Wire Operation - An external power supply delivering 13-35 VDC with minimum current capability of 40 mA DC (per Electrical connections to the Series 604A Transmitter are made transmitter) is required. See Fig. D for connection of power inside the enclosure on the left side of the unit. Remove the supply, transmitter and receiver. The range of appropriate cover, feed stripped and tinned leads through the bottom and receiver load resistance (RL) for the DC power supply available connect to terminal block screws marked 1,2,3 or 4. Refer to is expressed by the formula and graph in Fig. F. Shielded cable Figure B for locations of terminal block, span and zero adjust is recommended for control loop wiring. Do not employ a potentiometers. separate ground in 3 wire operation. Unit will not function properly and/or damage could result. Control loop polarity must ZERO ADJUSTMENT be observed in the following respect. Although power supply terminals 1 and 2 are not polarized, the receiver must be connected between terminal 4 of transmitter and negative side of SPAN ADJUSTMENT power supply. 3-WIRE CONNECTION 12 3 4 TERMINAL BLOCK 1 + 2 POWER SERIES 604A SUPPLY – + 3 – PRESSURE mA 13-35 VDC TRANSMITTER 4 RECEIVER Fig. D Fig. B E-64-A (for c. bentley):E-64-A 8/17/10 10:40 AM Page 3 4-Wire Operation - An external power supply delivering 13-35 Voltage Output - Series 604A Differential Pressure VDC with minimum current capability of 40 mA DC (per Transmitters can be easily adapted for receivers requiring 1 transmitter) or 18-26 VAC with minimum current capability of 80 1-5 VDC or 2-10 VDC input. Insert a 249 OHM, /2 watt mA AC (per transmitter) is required. See Fig. E for connection of (1-5 VDC) or 499 ohm (2-10 VDC) resistor in series with the power supply, transmitter and receiver. The range of appropriate current loop but in parallel with the receiver input. Locate this L load resistance (R ) for the DC or AC power supply available is resistor as close as possible to the input. Because resistor expressed by the formulas and graphs in Figs. F and G. Shielded accuracy directly influences output signal accuracy, we cable is recommended for control loop wiring. Do not employ a recommend use of a precision ±0.1% tolerance resistor to separate ground in 4 wire operation. Unit will not function minimize this effect. See Figs. H and J. properly and /or damage could result. Control loop polarity must be observed, terminal 3 is negative and terminal 4 is positive. 3-WIRE CONNECTION (1-5/2-10 VDC OUTPUT) Power supply terminals 1 and 2 are not polarized. 4 WIRE CONNECTION POWER SERIES 604A SUPPLY PRESSURE 13-35 VDC TRANSMITTER POWER SERIES 604A SUPPLY PRESSURE 13-35 VDC TRANSMITTER 18-26 VAC Fig. H Fig. E 4-WIRE CONNECTION (1-5/2-10 VDC OUTPUT) POWER SUPPLY VOLTAGE-VDC (2, 3, OR 4 wire) POWER SERIES 604A SUPPLY PRESSURE 13-35 VDC TRANSMITTER 18-26 VAC Fig. J Fig. F POWER SUPPLY VOLTAGE-VAC (4 wire) Fig. G E-64-A (for c. bentley):E-64-A 8/17/10 10:40 AM Page 4 PRESSURE RANGING MULTIPLE RECEIVER INSTALLATION Each standard Series 604A Transmitter is factory calibrated to a An advantage of the standard 4-20 mA DC output signal used in specific stock range as shown in the Model Number Chart. If unit Series 604A Transmitters is the compatibility with a wide range was specially calibrated it will be marked accordingly. To check of receivers. Devices such as the A-701 Digital Readout, A-702 calibration or re-calibrate to a different range (within limits Digital Readout with alarms, an analog panel meter, a chart described in chart), follow the procedure below. For clarification, recorder and other process control equipment can be operated range is defined as that pressure which applied to the simultaneously. It is only necessary that all devices be designed transmitter will produce 20 mA DC of loop current. Zero for a standard 4-20 mA input, the proper polarity of input pressure will produce 4 mA DC. connections be observed and the combined receiver resistances must not exceed the maximum for the current loop. If any 1. With transmitter connected to its companion receiver and receiver indicates a negative or downscale reading, the signal power supply, an accurate milliammeter ranged to input leads are reversed. approximately 30 mA should be inserted in series with the current loop. A controllable pressure source should be MAINTENANCE connected to one leg of a tee with remaining legs run to the high After final installation of the Series 604A Differential Pressure pressure port of the transmitter and an accurate reference gage Transmitter, no routine maintenance is necessary. A periodic or manometer. Low pressure port must be vented to check of calibration is recommended following the procedure atmosphere. The transmitter must be calibrated in the same under PRESSURE RANGING. Except for this, these position in which it will be used; vertical is recommended. transmitters are not field serviceable and should be returned, freight prepaid, to the factory if repair is needed. Be sure to 2. Apply electrical power to the system and check for proper include a clear description of the problem plus any application operation. Slowly apply pressure and observe whether loop information available. current increases above the 4 mA zero pressure value. 3. Remove enclosure cover. Apply the full range pressure required and adjust the SPAN control on left for a reading of 20 mA in the current loop. 4. Relieve pressure and adjust the ZERO control on right for a reading of 4 mA in the current loop. 5. ZERO and SPAN controls are slightly interactive so steps 3 and 4 should be repeated until outputs are consistently 4 and 20 mA, respectively. 6. Remove the milliammeter from the current loop, replace cover, make connections to system pressure sources and place unit in service. ©Copyright 2010 Dwyer Instruments, Inc. Printed in U.S.A. 8/10 FR# 01-440523-10 Rev. 1 DWYER INSTRUMENTS, INC. Phone: 219/879-8000 www.dwyer-inst.com P.O. BOX 373 • MICHIGAN CITY, INDIANA 46361, U.S.A. Fax: 219/872-9057 e-mail: info@dwyer-inst.com