E-34-1:E-34 8/17/10 10:29 AM Page 1 Bulletin E-34-1 Series 604D Indicating Pressure Transmitter Specifications - Installation and Operating Instructions The Dwyer Series 604D Indicating Transmitter SPECIFICATIONS simultaneously provides local indication on a compact, easy to GENERAL read analog scale while also converting that pressure into a Maximum Pressure: 2 psig for 5 in w.c. or lower ranges; 11 standard 2, 3 or 4 wire, 4-20 mA signal for ranges as low as 0- psig for 10 in w.c. or higher ranges. 0.5 in. w.c. Positive, negative or differential pressures can be Media Compatibility: Air and non-combustible, non-corrosive measured within ±5% of full scale (gage reading) or ±2% of full gases. span output (transmitter signal). The basic mechanical Materials: Mineral and glass filled nylon housing, high impact components of the Series 604D units are similar to those used acrylic cover, silicone rubber diaphragm. ® in the popular, time-proven Minihelic differential pressure gage. However, the Series 604D models add electrical conditioning ELECTRICAL and amplification of a resistance change produced by an Power Supply: 10-35 VDC-2,3 or 4 wire 16-26 VAC-4 wire. isolated piezoresistive pressure sensor. This resistance change Connections: 4 screw terminal block. is the result of a slight flexing which results from spring Cable Gland: Fits .10 - .25 in (2.5 - 6 mm) O.D. cable. deflection as pressure is applied to the diaphragm which is Output Signal: 4-20 mA DC (limited at 38 mA DC). mechanically linked to the spring. Loop Resistance: DC; 0-1300 ohms AC; 0-1200 ohms. Current Consumption: DC; 38 mA max. AC; 76 mA max. Warm-Up: 10 minutes. Series 604D Indicating Transmitter Model & Ranges Model Ranges, Inches W.C. Minor Divisions PERFORMANCE AT 70°F (21.1°C) 604D-0 0-0.5 .02 Zero Output: 4 mA DC. 604D-1 0-1.0 .05 Full Span Output: 20 mA DC. 604D-2 0-2.0 .10 Accuracy, Gage: ±5% of full scale. 604D-3 0-3.0 .10 Accuracy, Transmitter: ±2% of full span output (Includes 604D-5 0-5.0 .20 linearity, hysteresis and repeatability). 604D-10 0-10 .50 Stability: 1% F.S./year. 604D-20 0-20 1.0 604D-40 0-40 2.0 ENVIRONMENTAL 604D-60 0-60 2.0 Operating Temperature: 20-120°F (-6.7° to 49°C). 604D-100 0-100 5.0 Thermal Errors: ±1%/50°F. MECHANICAL Weight: 8 oz (227 grams). Span and Zero: Internally accessible potentiometers. Pressure Connections: Barbed, for 3/16˝ (4-5 mm) I.D. tubing. STANDARD ACCESSORIES (2) #10 x 1˝ pan head sheet metal screws, (1) .050˝ hex allen wrench. 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-34-1:E-34 8/17/10 10:29 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: All models are calibrated with the scale in a vertical 2-Wire Operation - An external power supply delivering 10-35 plane and units with ranges under 5 in. w.c. should only be used VDC with minimum current capability of 40 mA DC (per in that position due to the sensitivity to gravitational forces which transmitter) must be used to power the control loop. See Fig. C cannot be corrected by zero adjustment. Higher range models for connection of the power supply, transmitter and receiver. can operate in other planes but zero (both mechanical electrical) Note the jumper between terminals 3 and 4. The range of and span adjustments may be necessary to maintain accuracy. 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 604D Indicating Transmitter to a 2-WIRE CONNECTION vertical surface using the 1˝ - #10 pan head sheet metal screws provided. Mounting holes are located in upper left and lower right corners of case. SERIES 604D POWER PRESSURE SUPPLY RECEIVER TRANSMITTER 10-35 VDC JUMPER GAGE ZEROING: WIRE After installation, check to confirm that gage reads exactly zero Fig. C with both pressure connections open and vented to atmosphere. If adjustment is necessary, grip case firmly with one hand and place palm of the other hand flat on clear cover. If difficult to grip, 3-Wire Operation - An external power supply delivering 10-35 try placing a thin sheet of rubber between hand and cover. VDC with minimum current capability of 40 mA DC (per Rotate counter-clockwise to remove. Zero adjust screw is transmitter) is required. See Fig. D for connection of power located at bottom of scale just to left of the indicating pointer and supply, transmitter and receiver. The range of appropriate slightly behind it. Use the .050˝ hex allen wrench included. receiver load resistance (RL) for the DC power supply available Replace cover. is expressed by the formula and graph in Fig. F. Shielded cable is recommended for control loop wiring. Do not employ a ELECTRICAL CONNECTIONS separate ground in 3 wire operation. Unit will not function CAUTION: DO NOT EXCEED SPECIFIED SUPPLY VOLTAGE properly and/or damage could result. Control loop polarity must RATINGS. PERMANENT DAMAGE NOT COVERED BY be observed in the following respect. Although power supply WARRANTY WILL RESULT. THIS UNIT IS NOT DESIGNED terminals 1 and 2 are not polarized, the receiver must be FOR 120 VAC or 240 VAC LINE OPERATION. connected between terminal 4 of transmitter and negative side of Electrical connections to the Series 604D Indicating Transmitter power supply. are made inside the enclosure on the left side of the unit. Remove the cover and feed 4 conductor cable through the cable 3-WIRE CONNECTION gland at bottom of housing. Make electrical connections to the 4- screw terminal block shown in Fig. B. See following instructions and drawings for details on your specific application. When POWER SERIES 604D SUPPLY PRESSURE connections are complete, tighten cable gland and replace 10-35 VDC TRANSMITTER cover. RECEIVER ZERO ADJUSTMENT Fig. D SPAN ADJUSTMENT 12 3 4 TERMINAL BLOCK Fig. B E-34-1:E-34 8/17/10 10:29 AM Page 3 4-Wire Operation - An external power supply delivering 10-35 Voltage Input - Series 604D Indicating Pressure Transmitters VDC with minimum current capability of 40 mA DC (per can be easily adapted for receivers requiring 1-5 VDC or 2-10 transmitter) or 16-26 VAC with minimum current capability of 80 VDC input. Insert a 249 OHM, 1/2 watt (1-5 VDC) or 499 ohm mA AC (per transmitter) is required. See Fig. E for connection of (2-10 VDC) resistor in series with the current loop but in parallel power supply, transmitter and receiver. The range of appropriate with the receiver input. Locate this resistor as close as possible load resistance (RL) for the DC or AC power supply available is to the input. Because resistor accuracy directly influences output expressed by the formulas and graphs in Figs. F and G. Shielded signal accuracy, we recommend use of a precision ±0.1% cable is recommended for control loop wiring. Do not employ a tolerance resistor to minimize this effect. See Figs. H and J. separate ground in 4 wire operation. Unit will not function properly and /or damage could result. Control loop polarity must 3-WIRE CONNECTION (1-5/2-10 VDC OUTPUT) be observed, terminal 3 is negative and terminal 4 is positive. Power supply terminals 1 and 2 are not polarized. POWER SERIES 604D SUPPLY PRESSURE 4 WIRE CONNECTION 10-35 VDC TRANSMITTER POWER SERIES 604D SUPPLY PRESSURE Fig. H 10-35 VDC TRANSMITTER 16-26 VAC Fig. E 4-WIRE CONNECTION (1-5/2-10 VDC OUTPUT) POWER SUPPLY VOLTAGE-VDC (2, 3, OR 4 wire) POWER SERIES 604D SUPPLY PRESSURE 10-35 VDC 1500 TRANSMITTER 16-26 VAC 1400 MAXIMUM VALUE (1300) 1300 1200 1100 Fig. J 1000 R MAX. = Vps-10.0 900 L 800 20 mA DC 700 600 500 400 OPERATING 300 REGION 200 100 50 05 10 13 15 20 25 30 35 40 VDC Fig. F POWER SUPPLY VOLTAGE-VAC (4 wire) 1400 MAXIMUM VALUE (1200) 1200 1100 R MAX=65(Vps)-560 1000 L 900 OPERATING 800 REGION 700 600 16 26 15 20 25 30 05 10 Fig. G RECEIVER RESISTANCE () TOTAL RECEIVER RESISTANCE () E-34-1:E-34 8/17/10 10:29 AM Page 4 MULTIPLE RECEIVER INSTALLATION OUTPUT RANGING An advantage of the standard 4-20 mA DC output signal used in Each Series 604D Indicating Transmitter is factory calibrated to Series 604D Transmitters is the compatibility with a wide range produce 4 mA at zero scale reading and 20 mA at full scale of receivers. Devices such as the A-701 Digital Readout, A-702 reading. The following procedure should be used to check the Digital Readout with alarms, an analog panel meter, a chart accuracy of the transmitter output. recorder and other process control equipment can be operated simultaneously. It is only necessary that all devices be designed 1. With unit connected to its companion receiver, insert an for a standard 4-20 mA input, the proper polarity of input accurate milliammeter with a full scale reading of approximately connections be observed and the combined receiver resistances 30 mA in series with the current loop. must not exceed the maximum for the current loop. If any receiver indicates a negative or downscale reading, the signal 2. Connect a controllable source of pressure to one leg of a tee, input leads are reversed. one leg to the high pressure port of the unit being tested and the third leg to a test gage or manometer with 2% or better accuracy. MAINTENANCE Be sure the low pressure port is vented to atmosphere. This After final installation of the Series 604D Indicating Pressure calibration check must be done in the same position in which the Transmitter, no routine maintenance is required. A periodic unit will be operated. Vertical is recommended. check of output calibration is recommended following the procedure described under OUTPUT RANGING. Otherwise, the 3. Apply electrical power to the system and allow 10 minutes transmitters are not field repairable and should be returned, warm-up time for components to stabilize. freight prepaid, to the address below if service is needed. Be sure to include a clear description of the problem plus any 4. With no pressure applied to the system adjust ZERO control application information available. inside electrical enclosure to produce exactly 4 mA current. Dwyer Instruments, Inc. 5. Apply full scale pressure as observed on the test gage or Attn: Repair Dept. manometer and adjust SPAN control for exactly 20 mA current. 102 Highway 212 Michigan City, IN 46360 6. ZERO and SPAN controls are slightly interactive so steps 4 and 5 should be repeated until outputs are consistently 4 and 20 mA, respectively. 7. Remove the milliammeter and test gage from the setup, make connections to system pressure source(s) and place unit in service. ©Copyright 2010 Dwyer Instruments, Inc. Printed in U.S.A. 8/10 FR# 01-440830-10 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