Televac MX2A Active Thermocouple Vacuum Gauge

Product catalog summary

Operating Specifications
The MX2A Active Thermocouple Vacuum Gauge operates within a range of 1 x 10^-4 Torr to 1000 Torr. It supports RS-485 communications and offers a selectable analog output from 0 V DC to 10 V DC. The device includes two programmable set points: Set Point 1 with an open collector and Set Point 2 with a relay. It requires a supply voltage between +22 V DC and +26 V DC, with a maximum power consumption of 8 W. The gauge is calibrated using dry air or nitrogen and can withstand overpressure up to 150 psi. It operates effectively between 0 °C and 50 °C and can be stored between -20 °C and 60 °C. The bakeout temperature varies depending on the material: 100 °C for brass and 200 °C for stainless steel, with electronics removed. The response time is ≤ 2 seconds, and accuracy varies across different pressure ranges.

Physical Characteristics
The housing is made of aluminum, and it connects electrically via a D-Sub 15-pin male connector. The typical weight with the sensor is 345 g, and without it, 186 g. Dimensions are available in the dimensional drawings.

Sample RS-485 Commands
Commands include reading units, setting units to Pascal, Torr, or Millibar, and reading vacuum levels. Specific commands are provided for setting and reading set point values.

Benefits
The MX2A is competitively priced, compact, and features an easy-to-read OLED display. It offers excellent resolution, repeatability, and unit-to-unit performance, with strong customer support. It is designed and manufactured in the USA.

Description
The MX2A utilizes a replaceable Televac 2A thermocouple vacuum sensor, offering a wide measurement range and RS-485 communications. It features two programmable set points and a selectable analog output. The OLED display enhances readability, and the unit is user-friendly with capacitive touch controls and RS-485 communication options.

Applications
Suitable for heat treatment, vacuum furnaces, thin film deposition, coating processes, cryogenics, and pharmaceutical processes.

Ratings and Compliance
The device is IP40 rated, RoHS compliant, and CE certified to EN 61010-1, EN 61236-1, and EN 55011 standards.

Electrical Connections
Detailed pin descriptions are provided for the D-Sub 15-pin connector, including analog output, RS-485 connections, and supply voltage pins.

Materials Exposed to Vacuum
Materials include nickel, glass, gold, tophet, cupron, and solder for certain part numbers, with stainless steel for others.

Set Points
Set Point 1 uses an N-Channel 60 V MOSFET open collector, while Set Point 2 is a relay with a maximum switching voltage of 220 V DC (250 V AC) and a current of 2A.

Related Products
Other products include the CC-10 Active Vacuum Gauge and the MP7ER Active Gauge, each with unique features and applications.

Ordering Information
Part numbers and configurations are provided for various fittings and sensor materials, along with cable lengths.

Catalog excerpts

Televac MX2A Active Thermocouple Vacuum Gauge-1

MX2A Active Thermocouple Vacuum Gauge Part Number: 2-8910-1XX Operating Specifications 1 Operating Range Communications Analog Output Programmable Set Points Set Point 1 Set Point 2 Supply Voltage Maximum Power Calibration Medium Overpressure Digital Output Resolution Analog Output Resolution Operating Temperature Storage Temperature Bakeout Temperature Brass (P/N: 2-8910-110) Stainless (P/N: All Others) Response Time Accuracy 0.1 mTorr to 1 mTorr 1 mTorr to 10 mTorr 10 mTorr to 10 Torr 10 Torr to 100 Torr 100 Torr to 1000 Torr Analog Output Display Readable Distance 1x to 1000 Torr RS-485 7 selectable 0 V DC to 10 V DC 2 Open collector Relay +22 V DC to +26 V DC 8W Dry air or nitrogen 150 psi 2 significant digits with exponent 16 bits 0 °C to 50 °C -20 °C to 60 °C 100 °C (electronics removed) 200 °C (electronics removed) ≤2s 0.1 mTorr resolution ±1 mTorr ±10% of reading ±30% of reading (vertical mount) ±10% of reading (vertical mount) ±5 mV 3 m (10 ft) The MX2A Active Gauge utilizes an easily replaceable Televac 2A thermocouple vacuum sensor. It has a variety of features including a wide range of measurement from 1 x 10-4 Torr up to 1000 Torr, RS-485 communications, two programmable set points, and a selectable analog output. The bright OLED display makes it easy to read from a distance. Options can be set from four capacitive touch controls located on the top of the unit or through RS-485 communications. The extensive selection of fittings, simplicity of use, ease of sensor replacement, and competitive cost make this unit an excellent choice for a variety of vacuum applications. Applications     Heat treatment and vacuum furnaces Thin film deposition and coating processes Cryogenics Pharmaceutical product processes Visit the Televac website at www.televac.com for a full list of applications. Analog Output Behavior Physical Characteristics Housing Electrical Connections Weight with Sensor (typical) Weight without Sensor Dimensions Aluminum D-Sub 15-pin male 345 g (0.76 lbs) 186 g (0.41 lbs) See dimensional drawings Read units Read SP1L and SP1H Set units to Pascal Set units to Torr Set units to Millibar Set SP1 low and high values Read vacuum Competitively priced Very compact design Easy to read color OLED display Excellent resolution and repeatability Superior unit to unit performance Excellent customer support Designed and manufactured in the United States of America See the Televac website at www.televac.com for a list of definitions for terms used in the operating specifications. All test data was acquired at 23 °C. email: [email protected] IP40 RoHS compliant CE certified to EN 61010-1, EN 61236-1, EN 55011 See the MX2A Instruction Manual for RS-485 command descriptions and setup instructions.

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Televac MX2A Active Thermocouple Vacuum Gauge-2

Dimensional Drawings Description Analog Out (Ground) RS-485 A (-) SP2 NC SP2 NO SP1 Open Drain Floating Floating Supply Voltage (+) Analog Out (0 to 10) V RS-485 B (+) SP2 Com SP1 Source Floating Floating Supply Voltage (-) Ordering Information Materials Exposed to Vacuum MX2A P/N: 2-8910-110, -116, -125 Nickel Glass Gold Tophet Cupron Solder MX2A P/N: All Others Nickel Glass Gold Tophet Cupron Stainless Steel Set Points The MX2A has two set points. Set point 1 is an N-Channel 60 V MOSFET open collector. It has a maximum current rating of 1 A. The data sheet can be found at www.vishay.com/docs/69958/si2308bd.pdf....

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