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Series
634ES Transmitters
sense a single pressure of air, compatible gas or liquid and produce
a standard 4-20 mA output signal. Positive pressure can be measured
within an accuracy of ±2% of span (634ES2) and ±1% of span (634ES1).
The Series 634ES uses an isolated piezoresistive pressure sensor
to produce a resistance change across a wheatstone bridge. Convenient
2-wire operation simplifies installation and expands application
versatility over comparable 3 or 4-wire units. Zero and span adjustments
are fully protected inside a rugged die cast aluminum housing with
durable gray polyurethane finish. Enclosure is designed to meet
NEMA 4X requirements.
PHYSICAL
DATA
Maximum Pressure: 1.5 x maximum range.
Media Compatibility: Air and non-corrosive gases and liquids.
Housing: Designed to meet NEMA-4X.
Power Supply: 12.3 to 35 VDC.
Output Signal: 4-20 mA DC, 2 wire (limited at 38 mA maximum).
Loop Resistance: 0-1135 ohms from 12.3 to 35 VDC.
Current Consumption: DC: 38 mA max..
Housing: Die cast aluminum with textured gray polyurethane
finish, beryllium copper. Bourdon tube, stainless steel pressure
connection..
Weight: 1 lb., 12 oz. ( 0.8 kg).
Span and Zero Adjustments: Protected potentiometers, located
in auxiliary housing.
Pressure Connection: ¼" NPTF x ½" NPT(M).
PERFORMANCE AT 70°F (21°C)
Zero Output: 4 mA DC.
Full Span Output: 16 mA DC.
Accuracy: ±2% of full span output (634ES2), ±1% of full span
output (634ES1).
Stability: ±1% F.S./yr.
Warm-up Time: 10 minutes.
Operating Temperature: 20 to 120°F (-6.7 to 48.9°C).
Thermal Errors: ±1% per 50°F (27.8°C) typical
STOCKED
MODELS in bold |
