Ashcroft GC31 Installation And Maintenance Instructions Manual

Ultra-compact digital pressure sensor

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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.

Installation and Maintenance

Instructions for GC31

Ultra-Compact Digital

Pressure Sensor

LOOK FOR THIS

AGENCY MARK ON

OUR PRODUCTS

Version 5.0 10/07

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Page 1 Installation and Maintenance Instructions for GC31 Ultra-Compact Digital Pressure Sensor Ashcroft Inc. 250 East Main Street, Stratford, CT 06614 USA Tel: 203-378-8281, Fax: 203-385-0402 www.ashcroft.com LOOK FOR THIS All sales subject to standard terms and conditions of sale. AGENCY MARK ON ©...
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 5: Caution
4. USE IN LIFE SUPPORT DEVICES Ashcroft Inc. products are not authorized for use as critical components in life support devices or systems without the express written approval of the General Manager, Stratford Operations of Ashcroft Inc.
Page 6: Specifications
1. SPECIFICATIONS: PERFORMANCE SPECIFICATIONS Analog Output (1–5Vdc): Accuracy: ±1.0% FS (Accuracy includes the effects of Linearity, Hysteresis and Repeatability) Response Time: 50msec Output Resolution: 25mV Analog Scaling: User may configure analog output scaling to any range within Full Scale of sensor range Pressure Switch Output: Type: NPN or PNP Open Collector up to 30Vdc/80mA Setting Accuracy: ±1.0% FS...
Page 7: Dimension Drawings
2. PRODUCT DIMENSIONS Product label 1.57 1.18 1.18 PRESSURE SENSOR OUT1 OUT2 1.18 ADJ. MODE Back Connect Type with ⁄ NPT Male (G ⁄ B optional) 1.26 PRESSURE SENSOR OUT1 OUT2 1.57 ADJ. MODE Lower Connect Type with ⁄ NPT Male (G ⁄...
Page 8: Installation
Brown…………………………….. Power (+) Blue………………………………. Power (–)/COM Orange……………………………. Analog output (+) Black……………………………… Open collector output OUT 1 (+) White……………………………… Open collector output OUT 2 (+) Analog Output (1-5VDC) GC31 (Brown) Power (+) (Black-White) (Orange) 1-5Vdc Load min. (Blue) Power (–)
Page 9 NPN Type Switch Function (wiring to relay) (Brown) GC31 Power (+) Relay Output (Black-White) Relay 80mA max. Protective transistor diode (ensure to install) (Blue) Power (–) Note: Ensure that the relay’s operation coil rated current and voltage are within the transistor’s rating.
Page 10: Noise Prevention
The pressure display can fluctuate and provide incorrect output if noise is present in the power supply/wire. Care should be taken to keep the GC31 power supply wires from high voltage lines and use a power line with a high noise rejection ratio.
Page 11: Function Setting Mode
Pressing the MODE key for 3 seconds displays “---”. To return to measurement mode from each setting mode, the “---” display will flash when 3 seconds have passed. Comparator setting mode Loop check mode • Hysteresis operation setting Function setting mode Setting point, deadband setting •...
Page 12 Measurement Mode MODE MODE Press > 3 sec. Press > 3 sec. Select with Function Setting Mode After 1 second keys Hys or (Comparator operation selection) Message displayed Current setting Hysteresis Window comparator Select with MODE After 1 second keys MPa or (Display selection) Message displayed...
Page 13: Switch Setting Mode
1.000 9E. FILTER SECTION The GC31 is equipped with 5 internal time constant filters. Use this function when pressure fluctuations can result in erratic, difficult to read displays. The time constant for the selected filters reflects on the switch outputs as well as the analog output.
Page 14 NOTE: if the switch’s setting value is set outside the display range, the switch’s setting value can be rewritten automatically by the function setting mode operation. Measurement Mode MODE MODE Press < 3 sec. Press > 3 sec. Comparator Setting Mode Loop Check Mode After 1 second Set any desired value within...
Page 15: Switch Operation
11. SWITCH OPERATION – HYSTERESIS/DEADBAND Setting the upper limit This is the mode in which the switch operates with the setting value (A) as the upper limit. The upper limit setting is determined when you select a positive number (including 0) for set- ting value (b).
Page 16: Other Functions
Loop check function At the end of the Switch Operation Menu is the Loop Check function. Using the MODE key to select the Loop Check function. After lop is displayed for 1 second, the value of the lat- est measurement mode is displayed as default. Use keys to set displayed value any- where between –1999 and 1999 to confirm switch operations and/or analog output operation.
Page 17: Error Display
Maximum/Minimum Pressure Capture The GC31 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 displayed while holding the keys respectively. Message pe+ is displayed for one second and selected Max/Min value is displayed by this operation.
Page 18: Maintenance & Warranty
14. 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 © 2009 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&M011-10170 -01/10...