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Prosense AUTOMATIONDIRECT DPTW Series Installation And Maintenance Instructions Manual

Differential pressure transmitter
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I
nstallatIon and
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I
aIntenance
nstructIons
dPtW s
for
erIes
d
P
IfferentIal
ressure
t
ransMItter

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Summary of Contents for Prosense AUTOMATIONDIRECT DPTW Series

  • Page 1 nstallatIon and aIntenance nstructIons dPtW s erIes IfferentIal ressure ransMItter...

  • Page 2: Table Of Contents

    User Manual - DPTW Differential Pressure Transmitter In this Chapter... Caution ...........................4 1. Preface ........................5 2. Overview ........................5 3. Features ........................5 4. Specifications ......................6 Specifications Cont.......................7 5. Mounting ........................8 5.1 General ........................8 5.2 Mounting Orientation ....................8 5.3 Installing Pressure Port Manifold ................8 6.
  • Page 3 User Manual - DPTW Differential Pressure Transmitter 15. Dimension Drawings .....................31 16. Maintenance and Warranty ..................32 17. Advanced Water Flow Rate and Volume Application Example ......33 DPTW User Manual, 1st Edition...

  • Page 4: Caution

    User Manual - DPTW Differential Pressure Transmitter Caution Warning! Read Before Installation General A failure resulting in injury or damage may be caused by excessive overpressure, excessive vibration or pressure pulsation, excessive instrument temperature, corrosion of the pressure containing parts, or other misuse. Contact AutomationDirect.com technical support before installing if there are any questions or concerns.

  • Page 5: Preface

    Before beginning work, the specialist staff must have read and understood these instructions 2. Overview The ProSense DPTW differential pressure transmitter series is precision engineered for accurate differential or gauge pressure measurement. The wet-wet design uses a silicon based variable capacitance sensor with stainless steel media isolation diaphragms and silicone pressure transmission fluid making it compatible with a wide variety of liquids, gases, and steam applied to both pressure sensing ports.

  • Page 6: Specifications

    User Manual - DPTW Differential Pressure Transmitter • Digital Filter Function: User adjustable damping of the output signal by means of internally calculated moving average to provide a stable output signal in applications where the user wants to reduce the pulsating of the display and / or output signal. •...

  • Page 7: Specifications Cont

    User Manual - DPTW Differential Pressure Transmitter Specifications Cont. DPTW Series Specifications Performance Specifications Continued Pressure Range: ≤ 8 inH Proof: 30 psid Burst: 130 psid Single Side (Differential) Pressure Range: ≥ 20 inH Proof: 100 psid Burst: 130 psid Pressure Range: Effect: ≥...

  • Page 8: Mounting

    User Manual - DPTW Differential Pressure Transmitter 5. Mounting 5.1 General The DPTW was designed to be mounted using the bracket supplied. Pressure connections are made via the (2) 1⁄4” NPT female pressure ports. Although the display can be rotated in 90 degree increments by removing the display cover it is preferable to orientate the electrical termination downward, particularly in applications where protection from the environment is required.

  • Page 9: Piping

    User Manual - DPTW Differential Pressure Transmitter M4 x 40 Panel mounting bracket O-rings Equalizing valve High pressure Low pressure inlet (L) inlet (H) 6. Piping Note: High (H) and Low (L) pressure sides of the device are marked on the yellow label affixed to the housing of the unit.

  • Page 10: Wiring

    User Manual - DPTW Differential Pressure Transmitter Note: • When transporting and / or mounting do not apply excessive shock or use device as a step. • The piping should be of proper length so as not to apply load to the connection point on the transmitter.
  • Page 11 User Manual - DPTW Differential Pressure Transmitter Power source ＋ Receiver 12-32 VDC － ＋ － 4-20 mA Transmission cable Terminal box Shield Display (board) Notch CASE Transmission cable (Twist) Inside sensor Line Cable Jacket DISPLAY LCD holder Cable Gland COVER •...
  • Page 12 User Manual - DPTW Differential Pressure Transmitter • After completing connections locate retaining clips in the appropriate notches and carefully place into the housing. Be sure that internal sensor transmission wire does not cross the power supply lines just installed. •...
  • Page 13 User Manual - DPTW Differential Pressure Transmitter Test Terminals CH– Linear scaling mode No function Differential pressure unit monitor in H Scaling - Arbitrary unit monitor            Measured data display Total flow volume Total flow volume display (X1000)

  • Page 14: Mode Changes

    User Manual - DPTW Differential Pressure Transmitter 9. Mode Changes • Measurement Mode (Section 11 for further detail) will be entered upon power-on. Setting Mode (Section 14 for further detail) is entered by pressing and holding the MODE button for more than 3 seconds. If there is no button operation for 10 minutes in the setting mode, it will shift back to the Measurement Mode automatically.

  • Page 15: Measurement Mode

    User Manual - DPTW Differential Pressure Transmitter 11. Measurement Mode The measurement mode includes differential pressure display mode, linear display mode, and square root display mode (flow measurement). For the Setting items 1 to 27, please refer to the Setting Mode (Section14). 11.1 Filter (Damping) Set the filter before setting pressure display mode or linear (scaling) display mode.

  • Page 16: Linear Display Mode (Re-Scaling In Arbitrary User Defined Units)

    User Manual - DPTW Differential Pressure Transmitter Setting example 1 : Differential pressure display mode The setting to use the differential pressure range 0 to 20 inH O (“W.C.) and to display the zero point and span point of the analog output as –2 inH O and 18 inH O respectively is as follows:...
  • Page 17 User Manual - DPTW Differential Pressure Transmitter Display Display Full Scale Offset (20mA) (20mA) Offset (4mA) Full Scale (4mA) Differential Differential Pressure Pressure (Min.) (Min.) (Max.) (Max.) See Section 14.4 for full menu. Min. differential pressure P max. differential pressure P setting ==>...

  • Page 18: Square Root Display Mode

    User Manual - DPTW Differential Pressure Transmitter Select the filter of “0 seconds” ==> Setting item For display mode, select “Linear display mode - [Lin] ” ==> Setting item Set min. differential pressure P1 as “20 inH O” ==> Setting item Set max.
  • Page 19 User Manual - DPTW Differential Pressure Transmitter Momentary flow rate Dx is expressed by the square root formula (a), and can be calculated only by measuring the generated differential pressure Px (percent value over the differential pressure range). 100(%) In addition, the coefficient k is determined by substituting the maximum momentary flow rate Dm, which is measured from the formula (a), and the corresponding differential pressure Pm into the formula (b).
  • Page 20 User Manual - DPTW Differential Pressure Transmitter Integrated volume • The units of integrated volume include two standards: Time factor and flow rate volume factor. Setting of integrated volume unit ==> Setting item • The number of digits of integrated volume display is a maximum of 6 figures (999999);...
  • Page 21 User Manual - DPTW Differential Pressure Transmitter Setting example 3: Square root display mode (Flow measurement using arbitrary units) A differential pressure flow meter application uses a DPTW with differential pressure measuring range of 40 inH O. At a maximum momentary flow rate of 120 in the arbitrary units of Gallons per Minute (GPM), the differential pressure is 32 inH O (80% F.S.).
  • Page 22 User Manual - DPTW Differential Pressure Transmitter Setting example 3 continued: Square root display and analog output Momentary flow rate display (GPM) Measured differential pressure: 16 inH O Integrated volume display (Gallons) • Displayed momentary flow: 84.9 GPM Integrated volume 270225 •...

  • Page 23: Out Of Range Display

    User Manual - DPTW Differential Pressure Transmitter 11.5 Out of Range Display (1) Range Over display In the Measurement Mode, if the pressure is below –15% F.S. (URL) “–FFF” will be displayed, and if it is more than 115%F.S., “FFF” will be displayed. (2) Span Over display When the user has adjusted the span of the device this case will apply.

  • Page 24: Key Lock

    User Manual - DPTW Differential Pressure Transmitter – Error Message – – Normal Message –   CAUTION: Only perform the zero point correction when both the H and L ports are open to the atmosphere. If done incorrectly the accuracy of the device may be effected. 13.
  • Page 25 User Manual - DPTW Differential Pressure Transmitter The setting of the following table is the Setting example 1: pressure display mode of Section 11-2. This applies when re-scaling in “inH 0” units. See Section 14.4 for full menu. Setting Item LCD Display Setting Description Setting Range...

  • Page 26: Setting Items For Linear Display Mode

    User Manual - DPTW Differential Pressure Transmitter 14.2 Setting Items for Linear Display Mode (Re-scaling in arbitrary user Set the filter before setting the linear display mode (Refer to the preceding Section 11.1). The setting of the following table is the Setting example 2: Linear display mode of Section 11.3.

  • Page 27: Setting Items For Square Root Display (Flow Measurement)

    User Manual - DPTW Differential Pressure Transmitter 14.3 Setting Items for Square Root Display (Flow Measurement) Setting Item LCD Display Setting Description Setting Range Default Display mode Selection for flow measure- non: Differential pressure    ment/ square root extraction display mode Lin: Linear mode display mode Rot: Square...

  • Page 28: Setting Procedure (Setting Examples From 14.1, 14.2)

    User Manual - DPTW Differential Pressure Transmitter 14.4 Setting Procedure (Setting Examples from 14.1, 14.2) key for more than 3 seconds Measurement Mode Setting Mode  . Basic key operation Version display The setting item is changed by M key. The set value is changed or selected by key or key.
  • Page 29 User Manual - DPTW Differential Pressure Transmitter   Linear display       Square root display mode mode   Differential (Flow Measurement) pressure display mode Maximum Differential Refer to previous page  . Selection (Exam ft:4in) Flow Rate ...

  • Page 30: Loop Check

    User Manual - DPTW Differential Pressure Transmitter 14.5 Loop Check In each display mode, regardless of applied pressure, the loop check can be changed by arbitrarily linking the display with the analog output using the key operation. The display will show representative pressure readings correlating to the 4-20mA signal.
  • Page 31 User Manual - DPTW Differential Pressure Transmitter 15. Dimension Drawings Dimensions in inches 4.49 4 x Ø .22 Panel Mounting Holes 3.62 Bleed Port Bracket t = .08 Set Screw 2.91 2.28 DPTW 1.97 2.36 1.42 2 x Ø .06 Electrical Connection PG 13.5 Bleed Port threaded housing, factory...
  • Page 32 User Manual - DPTW Differential Pressure Transmitter 16. Maintenance and Warranty Periodic inspection Depending upon the type of use periodic inspection is recommeded at least once a year. Please refer to the following items for periodic inspection. Appearance Display/output check via appropriate pressure standard Display/output check via Loop Check (refer to Section 14.5) CAUTION •...
  • Page 33 User Manual - DPTW Differential Pressure Transmitter 17. Advanced Water Flow Rate and Volume Application Example This example demonstrates the use of DPTW differential pressure transmitter to measure and control flow rate in GPM. Also, to switch from flow rate reading to volume, automatic or manual.
  • Page 34 User Manual - DPTW Differential Pressure Transmitter Flow rate is calculated by measuring the differential pressure across an orifice plate. The DPTW will be using the orifice plate manufacturer’s data of maximum flow rate with corresponding differential pressure drop. Manufacturer orifice plate specifica�ons: = 8”...
  • Page 35 User Manual - DPTW Differential Pressure Transmitter • F 0 To enter filter selec�on (selec�ons of 0,2,4,8, and 16 �mes). • The filter func�on is used when pressure fluctuates to improve Step analog output and difficult to read display. • Select the filter F0.
  • Page 36 User Manual - DPTW Differential Pressure Transmitter L 0.0 To enter low-cut to flow rate. It forces display to zero and • analog output to 4 mA. Step • Low-cut shall not be used on this applica�on, constant flow rate shall be maintained.
  • Page 37 User Manual - DPTW Differential Pressure Transmitter • S bt To enter switch mode of momentary flow rate and integrated volume. There is manual mode (bt) or automa�c mode (�). • For this applica�on manual switch mode shall be selected. It only displays integrated volume when cover is removed and M Step bu�on is pressed.

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