MASS-tron II

Product Type: Differential & Multivariable Transmitters
Technology Type: Ultra-low range DP & Flow Transmitter with process temperature & pressure compensation and Auto Zero

Get direct mass measurement of airflow without the need for temperature and pressure compensation.

The MASS-tron II multi-variable mass flow transmitter is a VELTRON II transmitter with the addition of both process temperature and pressure compensation. This ultra-high accuracy transmitter includes analog outputs for process differential pressure, temperature and absolute pressure, an analog input for process temperature and a temperature compensation selection feature.

Direct mass flow measurement
High accuracy at very low flows

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Features and Benefits:

Accuracy. The MASS-tron II is designed to maintain an accuracy of 0.1% of Natural Span. For a span of 0 to 0.05 IN w.c., this accuracy is equivalent to an output accuracy of ±0.00005 IN w.c. differential pressure or 0.45 FPM velocity at span.
Continuous Display of Process. Standard on the MASS-tron II is a multi-line, backlit, graphical LCD providing up to four lines of data display, with each line individually scalable in user selectable format and units of measure. For high visibility, the main process variable (flow) is displayed with easy-to-read, triple-size digits. Other process variables are displayed with standard size digits.
Analog Communication. Each analog input and output signal can be individually configured for 0-5VDC, 0-10VDC, or 4-20mADC by means of a single jumper.
Electronic Respanning. The MASS-tron II operating span can be electronically selected anywhere between the Natural Span and 40% of Natural Span, without having to perform recalibration involving an external pressure source.
Primary Signal Noise Filter. To eliminate background noise and pulsations from the flow signal, the MASS-tron II is equipped with a user selectable digital low pass filter.
High Turndown Ratio Operation. The MASS-tron II, with its high level of accuracy and automatic zeroing circuitry, can maintain linear output signals on applications requiring velocity turndown of 10 to 1 (equal to a velocity pressure turndown of 100 to 1).
Microprocessor Based Functionality. The MASS-tron II’s on-board microprocessor performs the functions of operating parameter selection, transmitter configuration, input/output and display signal scaling, and transducer calibration. Imbedded software performs span, flow, and 3-point “K” factor calculations. Input to the micro-processor is via pushbutton.
AUTO-purge Management (optional). For “dirty air” applications requiring the use of an Air Monitor AUTO-purge system, the MASS-tron II provides the capabilities of establishing purge frequency and duration while giving the user a choice of either internally timed cycle frequency or externally triggered purge initiation. During the purge cycle all transmitter outputs are maintained at their last value prior to the start of the purge cycle.
Special Functions and Alarm Capability. The MASS-tron II is capable of performing one of five special application functions using a second transmitter as an input: Summed flow, flow differential, low signal select, high signal select, or percent deviation. The special function output can be both displayed and provided as an analog output signal. Alarms related to the measured process can be configured for one of three modes: Low/Low, High/Low, and High/High.
Multiple Operating Power Selections. Standard input power supplied to the MASS-tron II can be either 24VAC or 24VDC via automatic selection. An optional 120VAC external power transformer (UL listed) can be provided.

NEMA 1 Enclosure Rating.
CE Certification. For optional CE Certification, the MASS-tron II is furnished in a NEMA 4 enclosure.

SPECIFICATIONS

PERFORMANCE SPECIFICATIONS
Ranges:	Uni-Directional Natural Spans 0 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.
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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:	0-5VDC, 0-10VDC, or 4-20mADC for process temperature.
Analog Outputs:	0-5VDC, 0-10VDC, or 4-20mADC for process differential pressure, temperature, and absolute pressure.
Temperature Compensation Selection:	Pushbutton selection of linearized or non-linearized input, thermocouple or 100 ohm platinum RTD temperature sensor type.
	Type E	E -50 to 1750ºF	-50 to 950ºF
	Type T	-50 to 750ºF	-50 to 400ºF
	Type J	-50 to 2000ºF	-50 to 1090ºF
	Type K	-50 to 2000ºF	-50 to 1090ºF
	RTD	-50 to 1500ºF	-50 to 815ºF
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.
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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.

Applications:

— Combustion Airflow Processes:
- — Power Boilers
- — Combination / Biomass Boilers
- — Recover Boilers
- — CFBs
- — Fired Heaters
- — Kilns (Lime, Ceramic, Cement)
- — Digesters
- — Thermal Oxidizers
— Dirty Airflow processes:
- — Pneumatic Conveyors
- — Primary Air for Pulverized Coal
- — Paper Drying
- — CNCG & HVLC
- — Dust Collection Systems
- — Stack Flow Measurement
- — Cement
- — Quench Exhaust
- — Paint Spray Booths
- — Fluidized Bed Dryers / Coaters
- — Rotary Drum Dryers / Coaters
— Clean Airflow Processes:
- — Quench Airflow
- — LCD Glass
- — Engine Test Stands / Dynamometer
- — Product Testing
- — Process Developments / Pilot Plant
- — Aeration to Digesters
- — Process air and exhaust gases
- — Pure process gases, flue gas, and pure air

Best in Class Value Proposition:

Industry leading accuracy for airflow measurement.
Shortest straight run requirements in the industry.
Non-uniform flow profile problem solved: highest density of sensing point + patented measurement technology = excellent airflow measurement accuracy.
Dirty applications are no problem with AUTO-purge III feature.
Excellent long-term stability, repeatability, and unmatched accuracy when used with Air Monitor’s family of flow computers featuring AUTO-zero circuitry.
Available field start up services.