Ashcroft GC51 - Industrial Rangeable Pressure Transmitter Manuel d'utilisateur

© 2007 Ashcroft Inc. 250 East Main Street, Stratford, CT 06614 USATel: 203-378-8281, Fax: 203-385-0402 www.ashcroft.comAll sales subject to standard t

10Installation DrawingsMounting bracket holes4 - Ø .182.762.362.763.152.31.06.474.1psi6. DIMENSIONS7. WIRINGPower supply requirements, 12 -32 Vdc, not

11CASEDISPLAYCAPInside sensor LineLCD holderNotchTransmission cable(Twist)Sheath＋−Terminal boxDisplay (board)ShieldPower source＋ −ReceiverTransmission

12DisplayWire terminalsWireTurn with a screwdriverLCD clips (4)Display boardPower supplyterminal blockconnections, insert wire depth is equal to recom

13100075050025000 322010102030Load Limitations 4-20mA Output Only12 24545OPERATINGREGIONLoop Resistance (V)LOOP SUPPLY VOLTAGEVmin= 12V+[.022A*RL)]*In

148. DISPLAY FUNCTIONS(2)PressureUnit Monitor(1)MeasuredData(3)ArbitraryUnit Monitor(4)MODE key(5)DOWN key(6)UP keyCH+ CH-PSIMGC51TestTerminalsFunctio

15Measurement Mode Zero Adjust ModeSetting ModeHolding Value ResetPower ON MessagePower ONM key for morethan 3 secondsM key for morethan 3 secondsif t

1611. MEASUREMENT MODEThe measurement mode includes pressure display mode and linear(scaling) display mode.11.1 Filter (Damping)Set the filter before

17Select the filter of “8 times” ⇒ Setting item Select the “Pressure display mode” ⇒ Setting item Set output zero point as “10.0%F.S.” (10 psi) ⇒ Se

1811.3 Linear Display Mode (Re-scaling arbitrary user defined units)This mode is used for display/analog output of the scaling valuewhere the pressure

19B. Analog OutputThe zero point (4mA) and span point (20mA) of the analog out-put can be set in the range of 10 to 110%F.S. of the maximumdisplay spa

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20Maximum display span: OFFSET to FULL SCALEFor display mode, select “Linear display mode”⇒ Setting item Set min. pressure P1 as “10 psi”⇒ Setting it

2111.4 Minimum / Maximum DisplayIn Pressure Display Mode or Linear Display Mode the maximumand minimum values are captured into nonvolatile memory (EE

22C. Minimum / Maximum ResetThe Minimum / Maximum values can be reset when in either Mini-mum / Maximum display or Measurement Mode by holding theDOWN

2312. ZERO ADJUSTMENT MODEWhen in Measurement Mode the zero reading can be adjusted. To adjustthe zero reading be sure the pressure connection port (o

24Setting LCD Setting SettingNo. Item Display Description Range Default* Filter Selection of 1,2,4,8,moving average 16 times 4time of pressure: 8 (ti

2513.2 Setting Items for Linear Display Mode (Re-scaling in arbitrary userdefined units)Set the filter before setting the linear display mode (Refer t

26†In the setting of a pressure, the decimal point position is fixed for eachpressure range. (Refer to section 10, Power-on Message). The maximumpress

27Note: Holding the button for more than3 seconds returns to display mode.13.3 Setting Procedure

2813.4 Loop CheckIn each display mode, regardless of applied pressure, the loopcheck can be activated by following the push button sequence inSection

29• Analog output terminal checkWhen the front cover is removed, the analog output check terminals(pad: CH+, CH–) are visible at the upper part of the

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

3014. MAINTENANCE & SERVICE• Periodic inspectionDepending upon the type of use periodic inspection is recommended atleast once a year.Please refer

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32© 2007 Ashcroft Inc. 250 East Main Street, Stratford, CT 06614 USATel: 203-378-8281, Fax: 203-385-0402 www.ashcroft.comAll sales subject to standard

4WARNING! READBEFORE INSTALLATION1. GENERAL:A failure resulting in injury or damage may be caused by excessiveoverpressure, excessive vibration or pre

5Note: The shield and drain wire in the cable (if supplied) is not connected to thetransducer body, and is not a suitable ground.4. USE IN LIFE SUPPOR

61. PREFACEThank you for purchasing the GC51 Rangeable Pressure Transmitter. Inorder to utilize this product safely please note the preceding warning

7Note: Display not to be mounted in direct sunlight.4. SPECIFICATIONItem: DescriptionA. Media / Wetted Parts:Fluids or gases compatible with 316SS and

8system check and troubleshooting, 4 to 20mAL. Pressure Connection:1⁄4 NPT FemaleM. Enclosure:Material: Aluminum (die cast)Environmental Rating: IP65

9• Within vibration and shock specification5.2. Mounting OptionsDirect connection to pressure ports with suitable piping and / or pres-sure fitting or