The Ashcroft® A4 pressure transmitter is ideal for a broad spectrum of pressure sensing requirements where Intrinsically Safe or Non-Incendive hazardous location ratings are required. The Ashcroft® A4 is designed and manufactured to provide the user with accurate, reliable, and stable output data. This is accomplished through the use of an on board microprocessor, that is programmed during a unique digital compensation process, to provide extremely linear and precise performance over the entire specified pressure and temperature range.
Specifications
PERFORMANCE SPECIFICATIONS Reference temperature 70°F (21°C) Accuracy, Three Classes (% Span): ±.25 ±0.5 ±1.0 Includes non-linearity (Terminal Point Method), hysteresis, non-repeatability, zero offset and span setting errors Best Fit Straight Line* (BFSL): ±.20 ±.40 ±.50 Includes non-linearity hysteresis, non-repeatability errors *Add ±.05% for ranges above 5000 psi Stability: ±0.25% Span/year @ reference conditions Durability: Greater than 10 million cycles
ENVIRONMENTAL SPECIFICATIONS Temperature Limits: Storage: –40 to +125°C (–40 to 257°F) Process: –40 to +125°C (–40 to 257°F) Operating: –40 to +125°C (–40 to 257°F) Compensated*:–20 to +85°C ( –4 to 185°F) *Consult factory for other options Temperature Effects: –20 to +85°C (–4 to 185°F) • 1.0% of Span for .25% Accuracy Class • 2.0% of Span for .50% and 1.0% Accuracy Classes Humidity Effects: No performance effects from 0 to 95% relative humidity, non-condensing, 0-100% RH with “W” enclosure. *Consult factory
FUNCTIONAL SPECIFICATIONS Response Time: <2ms Pressure Ranges: Vacuum, gauge, compound and absolute pressure from 0-5 psi through 0-10,000. Equivalent ranges in bar available. See order guide section (reverse). Vibration Effect: Shock: 100g Peak, 11ms Random: 10g RMS, 20-2000Hz Sweep: 50-2000Hz, 5g peak Position Effect: ±0.02% Typical CE Mark (standard): EN 61326:1997 + A1: 1998 Annex A Heavy Industrial Immunity (Annex A, Table A.1) Light Industrial/Residential Emission (Table 4) Overpressure (F.S.)*: ProofBurst 0#/vac. to 300 psi 1.5 x F.S. min. 2 x F.S. 500-10,000 psi 1.2 x F.S. 1.5 x F.S. *For higher overpressure ratings use XK8 option.
ELECTRICAL SPECIFICATIONS Output Signal: Supply Voltage: (unregulated) MinimumMaximum 4-20mA* (2 Wire) 12Vdc 30Vdc *For Intrinsically Safe see entity parameters for supply voltage and load limits. Refer to Ashcroft A4 Installation & Maintenance document “I&M011-10166-A4.” Power Requirements: See load chart page 2 Electrical Terminations: See To Order section (reverse.) for options Circuit Protection: Reverse polarity and mis-wire protected Insulation Resistance (Circuit to Case): 100Mohm @ 30Vdc
PHYSICAL SPECIFICATIONS Case: Material 304SS Wetted Materials: 316L SS diaphragm and pressure port, optional 17-4PH SS diaphragm and 316L SS pressure port (see How to Order Section). Ingress Protection Rating: Enclosure Code Rating Basic (S) IP65, NEMA 4X All Welded (w/o Z/S) (W) IP67, NEMA 6
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