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Ashcroft GC35 Installation And Maintenance Manual

Heavy duty digital pressure sensor
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Installation and Maintenance
Instructions for GC35 Heavy
Duty Digital Pressure Sensor
Version 1.0 5/11
© 2011 Ashcroft Inc. 250 East Main Street, Stratford, CT 06614 USA
Tel: 203-378-8281, Fax: 203-385-0402 www.ashcroft.com
All sales subject to standard terms and conditions of sale.
I&M011-10172 . Rev A 5/11
1

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Summary of Contents for Ashcroft GC35

  • Page 1 Instructions for GC35 Heavy Duty Digital Pressure Sensor Version 1.0 5/11 © 2011 Ashcroft Inc. 250 East Main Street, Stratford, CT 06614 USA Tel: 203-378-8281, Fax: 203-385-0402 www.ashcroft.com All sales subject to standard terms and conditions of sale. I&M011-10172 . Rev A 5/11...

  • Page 3: Table Of Contents

    CONTENTS CAUTION ........................1. SPeCIfICATIONS ......................2. DIMeNSION DrAwINGS....................3. INSTAllATION ......................4. wIrING ..........................5. NOISe PreVeNTION ....................6. STOrAGe........................7. MAINTeNANCe ......................8. MeNU NAVIGATION ...................... 9-10 9. fUNCTION SeTTING MODe..................10-12 10. SwITCH SeTTING MODe ....................12-13 11.
  • Page 4 A failure resulting in injury or damage may be caused by excessive overpressure, exces- sive vibration or pressure pulsation, excessive instrument temperature, corrosion of the pressure containing parts, or other misuse. Consult Ashcroft Inc., Stratford, Connecticut, USA before installing if there are any questions or concerns.

  • Page 5: Specifications

    SPECIFICATIONS: PERFORMANCE SPECIFICATIONS Optional Analog Output (4-20mA): Accuracy ±1.0% FS (Accuracy includes the effects of Linearity, Hysteresis and Repeatability) Response Time: 30msec–10 sec (by user) Output Resolution: ±0.05 FS Analog Scaling: User may configure analog output scaling to any range within –100 to 150% Full Scale of sensor range.

  • Page 6: Installation

    MECHANICAL SPECIFICATIONS Pressure Connection: ⁄ NPT (Male) Connection Location: Lower, Back Enclosure: Nickel Plated Aluminum Rating: IP67 (Ranges 300 psi and above); IP65 (Ranges 150psi and below) Electrical Connection: M12 Connector (4 pin) Weight: Approx. 150 grams Media: Fluids and gases compatible with 316SS (sensing housing) and 17-4 pH SS (sensor diaphragm) 2.

  • Page 7: Wiring

    OUT1 BLACK NOTE: Mount M12 connector pins face on with electrical mating cable. Do NOT turn or pull on connector to prevent damage to unit. NPN Type Switch Function (Wiring to Relay) GC35 Power (+) Relay output Black (OUT1) 30Vdc/80mA max.
  • Page 8 PNP Type Switch Function (Wiring to Relay) GC35 Power (+) Relay protective transistor diode (make sure to install) Black (OUT1) 30Vdc/80mA max. Relay White (OUT2) Relay output Green Power (−) NOTE: Confirm the relay’s rated current and voltage are within the transistors rating.

  • Page 9: Noise Prevention

    The pressure display can fluctuate and provide incorrect output if noise is present in the power supply/wires. Care should be taken to keep the GC35 power supply wires from high voltage lines and use a power line with a high noise rejection ratio.

  • Page 10: Function Setting Mode

    Filter Setting The GC35 is equipped with 5 internal time constant filters. Use of the function is recommended when measuring transient pressure source such that display, comparator output, analog output do not stabilize. The selected time constant filter is reflected on comparator/analog output as well.
  • Page 11 Measurement Mode MODE Press 3 sec. MODE or longer Press 3 sec. or longer Function Setting Mode Select with After 1 second keys (n ~ P Select Comparator Mode Message displayed Current setting Hysteresis Window comparator MODE Select with After 1 second Comparator Operation keys Selection...
  • Page 12 Indication Scaling In (Display setting), when (indication scaling) is selected, arbitrary scaling value, based on the applied pressure, can be displayed on the unit. This feature can scale the display value based on the minimum and maximum pressures within the rated pressure range, and will not affect the ana- log or switch output.

  • Page 13: Switch Setting Mode

    10. COMPArATOr SwITCH SeTTING MODe / lOOP CHeCK MODe Setup Steps Pressing the MODE key for less than 3 seconds will display message within the Comparator Setting/Loop Check Mode. Scroll through appropriate displays and select feature to change/con- firm. LED ring will flash until this menu is exited to the Measurement Mode by holding the MODE key for more than 3 seconds.
  • Page 14 In “Comparator setting mode” , user can change settings on the comparator outputs provided by the unit. (Two comparator outputs or one for analog output unit are provided). The available selec- tions of this mode varies based on the selections made in Function setting mode and comparator output type selection.

  • Page 15: Switch Operation

    11. COMPArATOr SwITCH OPerATION When the comparator output conditions shown below are met, each output becomes ON status and "Comparator output LED (OUT1, OUT2)" is red lit. • Operation of hysteresis mode Setting the upper limit Setting the lower limit Pressure Pressure (dead-band)

  • Page 16: Other Functions

    10% F.S. , zero adjustment does not happen. Peak/Bottom (Max./Min.) Hold Display Mode The GC35 unit keeps the maximum and minimum pressure level applied to the pressure port as peak and bottom values respectively, in the internal memory. The peak and bottom values are dis- played as long as press and hold the keys respectively.

  • Page 17: Error Display

    Error Display Contents Actions Out of pressure display range (Upper limit) A pressure above 110% FS of pressure range is applied, or when indicated value exceeds 1999. Adjust the applied pressure within the rated pressure. Out of pressure display range (Lower limit) A pressure less than –10% FS of pressure range is applied, or when indicated value falls below –1999.

  • Page 18: Caution

    15. Maintenance and Warranty Periodic Inspection Depending upon the type of use periodic inspection is recommended at least once a year. Please refer to the following items for periodic inspection. 1. Appearance 2. Display/output check via appropriate pressure standard 3. Display/output check via Loop Check CAUTION •...
  • Page 20 © 2011 Ashcroft Inc. 250 East Main Street, Stratford, CT 06614 USA Tel: 203-378-8281, Fax: 203-385-0402 www.ashcroft.com All sales subject to standard terms and conditions of sale. I&M011-10172. Rev. A 5/11...

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