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VELTRON II
Product Type: Differential Pressure and Flow Transmitter
Technology Type: Ultra-low range DP & Flow Transmitter with Auto Zero
Get ultra-low flow accuracy and reliable airflow measurement over time with auto zeroing capability.
The VELTRON II Transmitter is an ultra-low differential pressure and flow “smart” transmitter. With its unparalleled accuracy, it is intended for the most critical and demanding industrial airflow applications requiring the utmost accuracy and long-term stability. The VELTRON II transmitter is furnished with an automatic zeroing circuit capable of electronically adjusting the transmitter zero at predetermined time intervals while simultaneously holding the transmitter output signal.
- High accuracy at very low flows
- Automatic zeroing to avoid offset drifts
SPECIFICATIONS
| PERFORMANCE SPECIFICATIONS | |||
|---|---|---|---|
| Ranges: | Uni-Directional Natural Spans0 to 25.00 IN w.c.0 to 10.00 IN w.c.0 to 5.00 IN w.c.0 to 2.00 IN w.c.0 to 1.00 IN w.c.0 to 0.50 IN w.c.0 to 0.25 IN w.c.0 to 0.10 IN w.c.0 to 0.05 IN w.c. | Bi-Directional Natural Spans-10.00 to 10.00 IN w.c.-5.00 to 5.00 IN w.c.-2.00 to 2.00 IN w.c.-1.00 to 3.00 IN w.c.-0.50 to 0.50 IN w.c.-0.25 to 0.25 IN w.c.-0.10 to 0.10 IN w.c.-0.05 to 0.05 IN w.c. | |
| Accuracy: | 0.1% of Natural Span, including non-linearity, hysteresis, deadband, and non-repeatability. | ||
| Span Rangeability: | The calibrated span can be down ranged to 40% of the Natural Span. | ||
| Stability: | ±0.5% of Natural Span for six months. | ||
| Transducer Response Time: | 0.5 second to reach 98% of a step change. | ||
| Temperature Effect: | Zero. None; corrected by AUTO-zero. Span. 0.015% of Full Span/ºF. | ||
| Mounting Position Effect: | None; corrected by AUTO-zero. | ||
| —————— | |||
| OPERATING SPECIFICATIONS | |||
| Digital Inputs: | Digital contact for AUTO-purge external start. | ||
| Digital Outputs: | Form C dry contacts rated for 3 amps at 24VAC/VDC for optional HI/LO alarm. Dual Form A dry contacts rated for 3 amps at 24VAC/VDC for AUTO-purge activation and acknowledgement. | ||
| Analog Inputs: | A single input is field configurable via jumper for 0-5VDC, 0-10VDC, or 4-20mADC. For use with optional special function. | ||
| Analog Outputs: | Dual transmitter outputs are individually configurable via jumper for 0-5VDC, 0-10VDC, or 4-20mADC. Two additional outputs are optionally available. | ||
| Network Communication: | Optional ModBus TCP/IP over Ethernet or LonWorks. | ||
| Power Supply: | Standard 24VAC (20-28VAC) or 24VDC (20-40VDC).Optional 120VAC (100-132VAC), via external transformer. | ||
| Power Consumption: | Standard: 18VA at 24VAC; 13VA at 24VDC; 36VA at 120VAC. With AUTO-purge Management: 54VA at 24VAC; 48VA at 24VDC; 108VA at 120VAC. | ||
| Overpressure and Static Pressure Limit: | 25 psig. | ||
| Low Pass Filtration: | Response time to reach 98% of a step change is adjustable from 2.0 to 250.0 seconds. | ||
| Automatic Zeroing: | Accuracy. Within 0.1% of calibrated span.Frequency. Every 1 to 24 hours on 1 hour intervals, user settable. | ||
| Circuit Protection: | Power input is isolated, fused, and reverse polarity protected. | ||
| Span and Zero Adjustment: | Electronic adjustment via keypad. | ||
| Display: | Standard 2-line x 20 characters LCD provides one line of data display. Optional 5-line x 20 (standard on MASS-tron II) backlit, graphical LCD provides indication of up to four process variables and Instrument ID tag. Triple-size digits for main process variable, standard size characters for the other process variables. | ||
| Humidity Limits: | 0-95% RH, non-condensing. | ||
| Temperature Limits: | -20 to 180ºF Storage.+40 to 140ºF Operating. | ||
| —————— | |||
| PHYSICAL SPECIFICATIONS | |||
| Enclosure: | NEMA 1 aluminum enclosure. | ||
| Signal Connections: | High and low pressure, 1/8″-NPT. | ||
| Electrical Connections: | External terminal strip with plug-in connections. Optional terminal strip enclosure with dual 3/4″ (0.875″ actual) conduit connections. | ||
| Weight: | 4.1 lbs. | ||
No submittals available