DWYER INSTRUMENTS, INC. Phone: 219/879-8000
Contents
1. Port HI RETURNING PRODUCTS FOR REPAIR Please contact Dwyer Instruments Inc before returning unit for repair to review information relative to your application Many times only minor field adjustments may be necessary When returning a product to Dwyer Instruments Inc the material should be carefully packaged and shipped Upon final installation of the Series WWDP Differential Pressure Transducer no routine maintenance is required A periodic check of system calibration is recommended The Series WWDP is not field serviceable and should be returned if repair is needed field repair should not be attempted and may void warranty Be sure to include a brief description of the problem plus any relevant application notes Contact customer service to receive a return goods authorization number before shipping Note Please remove any pressure fittings and plumbing that you have installed and enclose any required mating electrical connectors and wiring diagrams FR R1 443565 00 Rev 1 www dwyer inst com e mail info dwyer inst com2. Bulletin D 27 Series WWDP Wet to Wet Differential Pressure Transducers Duyer The Series WWDP Wet to Wet Differential Pressure Transducer offers everything in one package by having 30 field selectable variations in just 3 models The WWDP provides field selectable unidirectional and bidirectional pressure ranges configurable 0 5 1 5 0 10 VDC and 4 to 20 mA output It also provides an auto zero capability The field selectable port swap feature eliminates costly replumbing if the unit is improperly installed or if the transducer is simply replaced An optional LCD display is available for on site indication of line and differential pressure The all cast aluminum housing is rated NEMA 4 IP66 These features make the WWODP transducer an ideal instrument for measuring the flow of various liquids and gases pressure drop across filters measurement of liquid level Or pressurized vessels and for use in energy management and process control systems INSTALLATION The Series WWDP Wet to Wet Differential Pressure Transducer has 1 8 NPTF internal fittings The high pressure port and low pressure port are located on the bottom of the unit labeled HI and LO respectively MOISTURE PRECAUTIONS The Series WWDP is provided with a 0 875 DIA conduit opening for electrical termination intended for a 1 2 I D conduit connection This opening must be sealed according to standard industry practices in order to prevent moisture ingr
3. calibrated To select the other ranges slide the switch to the right Important Push zero button after installing the Series WWDP and after changing range Auto Zero Button Press and hold the ZERO push button for 2 seconds to automatically reset zero or provide contact closure on Remote Zero see Figure 2 and Figure 3 Electrical Output The unit is set to 4 20 mA To select another output move the slide switch to the right Electrical Connections Electrical termination for power supply 3 wire voltage output and 2 wire true 4 20 mA current output and remote zero wiring A Rev NORM A REV Analog Reverse When in reverse mode the output increases when the differential pressure decreases and decreases as pressure increases NORM When in Normal mode output increases as pressure increases and decreases as pressure decreases SLOW FAST When Slow mode is selected 5 second averaging is provided for surge damping BI DIR UNI DIR Select UNI Directional or Bl Directional mode Unidirectional mode measures from 0 to full scale differential pressure Bidirectional mode measures pressure from minus 1 2 of full scale to plus 1 2 of full scale differential pressure Output will read 1 2 full scale when differential pressure is zero SWAP NORM Jumper selectable Port Swap feature eliminates costly replumbing when incorrectly installed or replaced Go from NORMAL to SWAP and the jumper makes the HI Port LO and the LO
4. e C Valve A High Side Valve Differential Value B Low Side Valve Pressure Sensor Valve C Shunt Valve Figure 1 Phone 219 879 8000 www dwyer inst com e mail info dwyer inst com ELECTRICAL TERMINATION Wiring 2 Wire 4 to 20 mA Current Output and Remote Zero The Series WWDP when configured as a current output transducer is a true 2 wire 4 20 mA current output device and delivers rated current into any external load of 0 1000 ohms When configured as a 4 20 mA current output device the current flow is in one direction only PLEASE OBSERVE POLARITY We suggest that an electrical cable shield be connected to the system s loop circuit ground to improve electrical noise rejection 12 02 x Resistance of receiver plus line 30 004 x Resistance of receiver plus line Min Supply Voltage Max Supply Voltage Note The Zero terminals connected to digital output provide contact closure relay for automatic reset to zero pressure by the monitoring system CAUTION ZERO input is for dry contact do not apply voltage to ZERO Terminals ABCD ZERO ABCD BAR Psi AREV OTe OUTPUT sLow ele ae PATBIC D s or STS uni pir SWAP NorRM RANGES JAl8 c o Figure 2 Wiring 3 Wire 0 to 5 0 to 10 1 5 VDC and Remote Zero The Series WWDP when configured for voltage output is a 3 wire circuit device with three terminals available for wiring The Excitation and Output are c
5. ess into the Series WWDP MOUNTING The Series WWDP can be easily mounted using the two mounting screws located on the side of the unit INSTALLATION PROCEDURES For differential pressure measurements at high line pressure it is recommended that the pressure sensor be installed with a valve in each line plus a shunt valve across the high and low reference pressure ports as shown in Figure 1 The remote zero is a normally open relay wired between COM and REMOTE ZERO terminals In order to initiate ZERO function the relay contact shall be closed Important Do not exceed maximum range pressure with a total of differential pressure and line pressure ELECTRICAL INSTALLATION To access the electrical connections turn the screws on the top of the case counter clockwise until the hinged cover can be flipped up The Screws are captured and secured in the cover Wiring is through the 1 2 conduit opening Both current and voltage outputs are reverse excitation protected DWYER INSTRUMENTS INC P O BOX 373 MICHIGAN CITY INDIANA 46361 U S A 1 2 CONDUIT 0 Fax 219 872 9057 Specifications Installation and Operating Instructions 6 4 53 64 122 63 _ 1 15 64 31 35 1 43 64 42 47 5 11 64 131 37 64 4 21 PENING SPECIFICATIONS Service Gases or liquids compatible with 17 4 PH stainless steel Accuracy All pressure ranges have 1 full scale accuracy except the lowest selectable ran
6. ge of each unit is 2 full scale Stability 0 5 per year Temperature Limits Compensated Temperature Range 32 to 130F 0 to 54 Operating Temperature Range 4 to 185F 20 to 850 Pressure Limits Max working pressure WWDP 1 50 PSI WWDP 2 100 PSI WWDP 3 250 PSI Proof Pressure 2 2X of full scale Burst Pressure 40X of full scale Thermal Effect 2 FS 100 50C includes zero and span Power Requirements 12 to 30 VDC 18 to 28 VAC Reverse Excitation Protected NOTE 4 20 mA output cannot be powered with AC voltage Output Signal Selectable 0 5 0 10 and 1 5 VDC 4 to 20 mA Zero amp Span Digital re zero button Should be used when changing ranges Span can be adjusted by changing between field selectable ranges Response Time 1 to 5 sec selectable Loop Resistance 1000 ohms Current Consumption VDC power 0 5 1 5 VDC output 4 mA typ 0 10 VDC output 5 mA typ 4 20 mA output 20 mA max Current Consumption will equal the transmitter output in current mode VAC power 0 5 1 5 0 10 VDC output 40 mA typ Electrical Connections 1 2 Conduit Process Connections 1 8 Female NPT Internal Enclosure Rating Designed to meet NEMA 4 IP 66 Mounting Orientation Vertical Mount the pressure ports down keeps debris from building up inside the pressure port Size 4 x 6 x 2 in 102 x 152 x 51 mm Weight 1 5 lb 680 4 gm Agency Approvals CE High Low Valve ADA ik Valve B Valv
7. ommoned on the circuit Caution Do Not Connect exc to out The Series WWDP can operate from 12 30 VDC 18 28 VAC nominal output power supply NOTE The ZERO terminals connected to digital output provide a contact closure relay for automatic reset to zero pressure by the monitoring system CAUTION ZERO input is for dry contact do not apply voltage to ZERO Terminals e A REV SI NORM SLOW FAST Pp ALB IC D 6 pe fersuneoir 151 swap TS norm df Af Ic D Controller Voltage Relay o Copyright 2007 Dwyer Instruments Inc Figure 3 DWYER INSTRUMENTS INC P O BOX 373 MICHIGAN CITY INDIANA 46361 U S A Printed in U S A 9 07 Phone 219 879 8000 Fax 219 872 9057 Installation of the Series WWDP is now complete Important Prior to putting the unit into service press the Zero button then use the Range Selection Switch to select a range After selecting a range press the Zero button again For instructions regarding operation of the Series WWDP please refer to the following Operation OPERATION Auto Zero Button Electrical Output Range Selection Switch Configuration BAR ele PS A REV Lele NORM SLOW ee FAST a B jc JD BI DIR SI UNI DIR KI SWAP STS NORM 4 20 MA __ REMOTE ZERO Electrical Connections Figure 4 Range Selection Switch The unit is set to the highest range when
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