Ashcroft GC52 - Rangeable wet/wet Differential Pressure Tra Manual do Utilizador Página 1

Installation and MaintenanceInstructions for GC52 Differential Pressure TransmitterLOOK FOR THISAGENCY MARK ONOUR PRODUCTS© 2011 Ashcroft Inc. 250 Eas

10Terminal StripCableRequirements SMKDSP1.5/2-5.08 Phoenix Contact• Two core shielded cable• Cable outer diameter: 0.35˝ to 0.47˝ 9-12mm(Required for

11• Turn display over to expose terminal strip, make positive and negative connections, insert wire depth is equal to recommended strip length (0.25˝)

12• After completing connections locate retaining clips in the appropri-ate notches and carefully place into the housing. Be sure that inter-nal senso

13CH+CH–GC52In H2OM▼▲b Differential pressure unit monitorTest Terminalsd MODE keye DOWN keyf UP keyc Scaling - Arbitrary unit monitorh No f

149. MODE CHANGES• Measurement Mode (Section 11 for further detail) will be entered uponpower-on. Setting Mode (Section 14 for further detail) is ente

1511. MEASUREMENT MODEThe measurement mode includes differential pressure display mode, andlinear (scaling) display mode. For the setting items  to 

16䡵 Display and analog outputEx. Differential pressure of 8 inH2O• Differential pressure display: 8.00(H2O)• Analog output: 12(mA) in.H2O8.00Different

17Min. differential pressure P1and max. differential pressure P2setting ==> Setting item , OFFSET & FULL SCALE setting ==> Setting item ,

18For display mode, select “Linear display mode” ==>Setting item Set min. differential pressure P1 as “20 in.H2O” ==>Setting item Set max. dif

1911.4 Flow Measurement/Square Root Extraction Mode Square Root Display ModeCombining the sensing elements (orifice and pitot tube) with this prod-uct

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20• When the display resolution lowers and the wobbling of momentaryflow rate increases in the low flow domain of the differential pressureflow meter,

21• Integration is halted during the "FFF" display at the time of differential pressure range OVER (Refer to paragraph 11.5 (1) ).• The indi

22Set the output span point as “100.0%F.S.”(120.0 arbitrary unit of measure) of max. display span* ==> Setting item Set time factor selection(seco

23䡵 Square RootThe momentary flow rate Dx at a generated differential pressure of 16IW(40%F.S.) is calculated by the following formula:The coefficient

24 Setting of integrated volumeWhen a momentary flow rate unit is set as an arbitrary unit, the integrated volume is also an arbitrary unit and the f

25䡵 Square root display and analogMomentary flow rate display (arbitrary unit)Differential pressure: 12IW Integrated volume display (arbi

2611.5 Out of Range Display(1) Range Over displayIn the Measurement Mode, if the pressure is below –15% F.S.(URL) “–FFF” will be displayed, and if it

27• Overage display-0.050-ffffff1.050–15%F.S. (–3.0 inH2O) more/less – 5%F.S. (–1.0 inH2O) more/less 115%F.S. (23.0 inH2O) more/less 105%F.S. (21.0 in

28No. Setting Item LCD Display Setting Description Setting Range Default* Filter Selection of 0,2,4,8,16,sec 4moving averagetime of differentialpress

2914.2 Setting Items for Linear Display Mode (Re-scaling in arbitrary user defined units) Set the filter before setting the linear display mode (Refer

3CONTENTSCAUTION... 4-51. PREFACE...

30nonNo Setting Item LCD Display Setting Description Setting Range Defaultn00l0nSelection of lineardisplay mode: Linnon: Differentialpressure display

3114.3 Flow Measurement/Square Root Extraction ModeNo. Setting Item LCD Display Setting Description Setting Range DefaultDisplay moden~ roTSelection

32uMuMuMuMuMuMuMuMuMuMuMuMuMuMuMuMabecdfghijklu 6.00f 2n nonn l na 10.0a 90.0[ 1.00[ 1.00p 20.0p 120.0d 1d 0.0d 50.0a 0.0a 100.0[

33uMuMuMuMuMN ROTd 0 d i d Z d 3a 100.0L 0.0P. 4.00a 0.0U SE1U SE( U houU n~In U 10 U 100 U 1000Flow Measurement Mode(Square

34CheckTerminals14.5 Loop CheckIn each display mode, regardless of applied pressure, the loop check canbe changed by arbitrarily linking the display w

35Dimension Drawings Dimensions in inches 1.04.49 3.622.912.28 4.725.12 1.972.36 .69 2 x Ø .06Drain4 x Ø .22Panel Mounting Holes Bracket t = .08Ø 2.56

3616. MAINTENANCE AND WARRANTY䡲 Periodic inspectionDepending upon the type of use periodic inspection is recommeded at least once a year. Please refe

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4GENERAL:A failure resulting in injury or damage may be caused by excessiveoverpressure, excessive vibration or pressure pulsation, excessive in-stru

40© 2011 Ashcroft Inc. 250 East Main Street, Stratford, CT 06614 USATel: 203-378-8281, Fax: 203-385-0402, www.ashcroft.com All sales subject to standa

51. PREFACEThank you for purchasing the GC52 Rangeable Differential Pressure Transmitter. Refer to the Ashcroft GC52 Data Sheet for product specifica-

6(7) Zero and Span Adjustment: The adjustment of the Zero (4mA) andSpan (20mA) reading via internal push buttons.(8) Key Lock Function: Prevents inadv

77. Rangeability / Adjustment8. Display9. Units10. Setting Adjustments11. Enclosure12. Pressure Connection13. Electrical Termination14. Memory Protect

85. MOUNTING5.1 GeneralThe GC52 was designed to be mounted using the bracket supplied.Pressure connections via the (2) 1⁄4 NPT female pressure ports.

9(2) 1/4˝ NPTF1.4 (35).55 (14).83 (21)1.8 (45.4)1.0 (25.4)Hex .83 (21).33 (8.5)Equalizingvalve• 1.0 in. (25.4mm) mounting manifold6. PIPINGNote: High