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MX7M Cold Cathode Ionization Gauge
Instruction Manual
Rev D
© 2022 Televac® - The Fredericks Company
2400 Philmont Avenue
Huntingdon Valley, PA 19006
web:
www.frederickscompany.com
email:
sales@frederickscompany.com
tel: +1 215 947 2500
fax: +1 215 947 7464
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23
©2022 Televac® - The Fredericks Company |
www.televac.com | sales@televac.com
| +1 215 947 2500
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Summary of Contents for TELEVAC MX7M
- Page 1 MX7M Cold Cathode Ionization Gauge Instruction Manual Rev D © 2022 Televac® - The Fredericks Company 2400 Philmont Avenue Huntingdon Valley, PA 19006 web: www.frederickscompany.com email: sales@frederickscompany.com tel: +1 215 947 2500 fax: +1 215 947 7464 ©2022 Televac® - The Fredericks Company | www.televac.com | sales@televac.com...
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Page 2: Table Of Contents
Check what you’ve received ........................6 Safety Instructions ............................6 Connect Power ............................6 Check the Measurement Screen ........................ 6 Power down the MX7M ..........................6 Set Up ............................7 Installation ..............................7 Electrical Information ..........................7 Turning the High Voltage On and Off ......................7 Menu Navigation ........................ -
Page 3: Introduction
RS-485 communications with a PC, through USB communications with a PC, or through the unit’s front panel using four capacitive touch buttons located on the top of the unit. The MX7M has two set points, one relay and one open collector, and a selectable analog output option. The analog output is a configurable 0-10 V output that includes options for linear, linear-by-decade, and logarithmic formats. -
Page 4: Dimensions
1.4 Dimensions ©2022 Televac® - The Fredericks Company | www.televac.com | sales@televac.com | +1 215 947 2500 MX7M_im rev D Page... -
Page 5: Safety Information
2.1.4 The MX7M has voltages up to 4500 volts. As such, it represents a shock hazard and should be handled with caution. Any disassembly of the gauge should be carried out by a trained professional and with the power disconnected. -
Page 6: Quick Start Guide
The unit should power up and display "OFF" on the measurement screen. Do not attempt to turn on the high voltage. 3.5 Power down the MX7M 3.5.1 Power down the MX7M, and install it on a vacuum stand for use. ©2022 Televac® - The Fredericks Company | www.televac.com | sales@televac.com | +1 215 947 2500... -
Page 7: Set Up
7M sensor close to the area where vacuum measurement is desired is preferred to increase the accuracy. Each 7M sensor has a key that only allows for the MX7M to mate with the sensor in the proper orientation. Rotate the MX7M until the correct alignment is obtained and the MX7M is able to slide onto the 7M sensor. -
Page 8: Menu Navigation
RS-485 or USB communications. To navigate the menu simply use the buttons found on top of the MX7M. The four buttons include the SEL button, an UP arrow, a DOWN arrow, and an ENT button. Using the SEL button allows the operator to change between menu categories. -
Page 9: Menu Structure
5.2.6.2 Linear by Decade 5.2.6.3 Logarithmic 5.2.6.3.1 10 V Pressure 5.2.6.3.2 0 V Pressure 5.2.6.4 RS-485 Output 5.2.6.4.1 Address 5.2.6.4.2 Baud Rate ©2022 Televac® - The Fredericks Company | www.televac.com | sales@televac.com | +1 215 947 2500 MX7M_im rev D Page... -
Page 10: Explanation Of Menu Items And Navigation
The system settings menu contains the ability to change the measurement units, apply a gas correction factor, change the digital resolution to display an extra digit, and set the Vsense Control method for the unit. There is also a diagnostic screen for use by Televac® service representatives to troubleshoot the unit. - Page 11 Gas Type 6.3.3 6.3.3.1 The MX7M is an indirect pressure sensor and its accuracy will be affected by the presence of gases other than nitrogen. The MX7M has the ability to apply correction factors for six pre-defined gases: hydrogen, helium, neon, argon, krypton, and carbon dioxide.
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Page 12: Calibration
6.4 Calibration 6.4.1 To ensure that the unit always displays with the most accuracy, the MX7M includes a number of operator-configurable calibration points. While the MX7M is factory calibrated, the use of the included calibration points may become necessary after extended use, contamination, etc. If accuracy is critical, it is recommended to return the sensor to Televac®... -
Page 13: Set Points
6.5 Set Points 6.5.1 The MX7M contains two set points for the convenience of the operator. 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/si2308bds.pdf. -
Page 14: Analog Output
Decade, and Linear. 7.2 Linear 7.2.1 The Linear output covers a select range of the MX7M with a linear scale. The 10 Volt or full-scale value of the output can be selected from the following values: 1*10 Torr, 1*10 Torr, or 1*10 −5... -
Page 15: Logarithmic
0 V exponent selection screen. Press ENT to unlock the screen and the UP or DOWN arrow to select the 0 V value. ©2022 Televac® - The Fredericks Company | www.televac.com | sales@televac.com | +1 215 947 2500... -
Page 16: Cleaning The Mx7M Sensor
If properly cleaned and assembled, the sensor is ready for use without re-calibration unless NIST traceable calibration is required. Description Part Number MX7M Anode Assembly 1-7900-707 MX7M Electronics Assembly 2-8950-000 ©2022 Televac® - The Fredericks Company | www.televac.com | sales@televac.com | +1 215 947 2500 MX7M_im rev D Page... -
Page 17: Rs-485 And Usb Communications
To communicate with the MX7M via USB, the user must have a USB capable device to send commands to the MX7M. Each command must be preceded by a * and will be an S, R, W, RC, or WC. Because USB is a serial bus, the unit address is omitted from commands. See the Communications Specifications heading for information on what settings are necessary to properly communicate with the MX7M. -
Page 18: Rs-485 And Usb Command List
1 = menu control 2 = pin control Read high voltage state, where x is: 0 = off 1 = on ©2022 Televac® - The Fredericks Company | www.televac.com | sales@televac.com | +1 215 947 2500 MX7M_im rev D Page... - Page 19 2 = pin control W10x Set high voltage state, where x is: 0 = off 1 = on Response is new high voltage setting. ©2022 Televac® - The Fredericks Company | www.televac.com | sales@televac.com | +1 215 947 2500 MX7M_im rev D Page...
- Page 20 2 = pin control W10x Set high voltage state, where x is: 0 = off 1 = on Response is new high voltage setting. ©2022 Televac® - The Fredericks Company | www.televac.com | sales@televac.com | +1 215 947 2500 MX7M_im rev D Page...
- Page 21 Read RS-485 address, where x is 0 to F C2xx Set RS-485 address, where x is 0 to F Return new value before changing ©2022 Televac® - The Fredericks Company | www.televac.com | sales@televac.com | +1 215 947 2500 MX7M_im rev D Page...
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Page 22: Rs-485 Command Examples
1E-5 Torr Adjustment is Baaa, reading is PPSEE WC3Baaa<CR> PPSEE 1E-4 Torr Adjustment is Baaa, reading is PPSEE WC4Baaa<CR> PPSEE 1E-3 Torr Adjustment is Baaa, reading is PPSEE ©2022 Televac® - The Fredericks Company | www.televac.com | sales@televac.com | +1 215 947 2500 MX7M_im rev D Page... -
Page 23: Rs-485 And Usb Communications Error Codes
Units error: an invalid parameter was sent after a command specifier 9.8 Firmware Updates 9.8.1 The MX7M has the ability to update the firmware when in the field over the USB communications. For more information on updating the firmware, please contact sales@frederickscompany.com. ©2022 Televac® - The Fredericks Company | www.televac.com | sales@televac.com...