Model 574 Pressure Transmitter
Viatran’s Model 574 differential pressure transmitter employs variable capacitance sensing technology for extreme reliability and high accuracy. The 574 measures pressures from 5” WC to 100 PSI with over pressure protection to 3000 PSI. The all welded 316 stainless steel construction allows the airtight and watertight 574 to be in corrosive environments, including salt air or caustic solutions.
External zero, span and calibration controls are hermetically sealed, yet are easily adjusted with Viatran’s magnetically coupled drive system. The signal conditioner in the 574 allows for 5:1 ranging of the transmitter’s
standard pressure range.
PERFORMANCE
| Full Scale Pressure Ranges | 0-5, 10, 20, 50, 100, 300, 750" W.C.D. 0-15, 50, 100 PSID | |
| Nonlinearity (Best Fit Straight Line) | ≤±0.15% FSO | |
| Hysteresis | ≤ ±0.1% FSO | |
| Repeatability | ≤ ±0.1% FSO | |
| Full Scale Output (FSO) | 16 mA at 70° F (21°C) | |
| Resolution | Infinite | |
| Long Term Stability | ≤±0.1% FSO per 6 months | |
| Zero Shift with Base Pressure | ≤±2.0% FSO per 1000 PSI | |
| Span Shift with Base Pressure | ≤±1.0% FSO per 1000 PSI | |
| Zero Shift After 3000 PSI Overload | Side Angle: ≤± 0.1% FSO Alternate Angle: ≤±0.5% FSO |
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| Compensated Temperature Range | 0°F to 170°F | |
| Operating Temperature Range | -10° F to +190° F | |
| Storage Temperature Limits | -65°F to +250°F | |
| Temperature Effect on Zero | ≤± 1.0% FSO per 100° F | |
| Temperature Effect on Span | ≤± 1.0% FSO per 100° F |
ELECTRICAL
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Supply Voltage:
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8.5 to 40 Vdc
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Power Supply Regulation Effect
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≤±0.02% FSO per volt over supply voltage range
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Output Signal
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4 to 20 mA
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| Load Impedance | 1500 Ohms maximum at 40 Vdc | |
| Zero Adjustment | -100% FSO elevation to +50% FSO suppression of the standard range | |
| Span Adjustment | Rangeable down, 5:1 from standard range | |
| Calibration Signal | 20% of FSPR externally switched | |
| Calibration Signal Accuracy |
≤±1% of the stated value |
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| Circuit Protection | Varistor protected across the input leads for surges above 40V and currents to 250 Amps peak with a pulse width of 8 x 20 µSec. Reverse polarity protected | |
| Insulation Resistance | >1000 MegOhms to case ground at 40 Vdc and 70° F | |
| Response Time | 10% to 90% FS Faster response available with NF option | |
| Electrical Connection | 1/2” NPT male, 3 wires, 18 AWG | |
| Wire Codes | RED + Signal / Power BLACK - Signal / Power GREEN Case Groun |
MATERIALS OF CONSTRUCTION
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Housing
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316 Stainless Steel
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Wetted Parts
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316 Stainless steel and Viton O-Ring
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| Weight | 7 lbs. | |
| Identification | Laser etched onto body |
MECHANICAL
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Pressure Connection
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1/4” NPT female on 2-1/8” centers on flanges
1/2” NPT female on 2”, 2-1/8” or 2-1/4” centers with optional adapter |
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Proof Pressure
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3000 PSID and/or 2000 PSI base pressure
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Burst Pressure
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4500 PSID and/or 4500 PSI base pressure
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| Diaphragm Displacement | 0.002 cubic inches at FSPR | |
| Fill Fluid | Dow DC200 Silicone oil | |
| Mounting | May be supported by process piping or by optional mounting bracket |
OPTIONS
