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Instruction Manual

MX2A Active Thermocouple Gauge

3.3

RS-485 Command List

Table 3: RS-485 Commands

Command

Description

Read units

Read SP1L and SP1H

Read SP2L and SP2H

Set pressure units

Set SP1L,SP1H

Set SP2L,SP2H

Set gas type

Read pressure data

RC1

Read vacuum adjustment

RC2

Read 10 Torr adjustment

RC3

Read atmosphere adjustment

WC1

Write vacuum adjustment

WC2

Write 10 Torr adjustment

WC3

Write atmosphere adjustment

email: [email protected]

tel: +1 215 947 2500

web: frederickscompany.com

mx2a_im rev F

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Содержание MX2A

Страница 1: ...A Active Thermocouple Gauge Instruction Manual The Fredericks Company Televac 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 ...

Страница 2: ...ions Settings 14 3 2 Communications Specifications 14 3 3 RS 485 Command List 15 3 4 RS 485 Sample Commands 16 3 5 RS 485 Error Codes 17 List of Tables 1 Operating Specifications 3 2 RS 485 Communication Specifications 14 3 RS 485 Commands 15 4 RS 485 Commands 16 5 Understanding the Sample Commands ppse PPSE and Baaa 16 6 Examples for ppse PPSE and Baaa 17 7 Error Code Explanations 17 List of Figu...

Страница 3: ... 1 10 4 Torr to 1000 Torr It utilizes a Televac thermocouple vacuum sensor part number 2 2126 0YY It has a two color OLED display with selectable units of Torr Millibar and Kilopascal Settings can be changed through RS 485 communi cations with a PC or on the unit using four capacitive touch buttons located on the top of the unit The MX2A has 2 set points one relay and one open collector and a sele...

Страница 4: ...ent Analog Output Resolution 16 bits Operating Temperature 0 C to 50 C Storage Temperature 20 C to 60 C Bakeout Temperature Brass P N 2 8910 110 100 C electronics removed Stainless P N All Others 200 C electronics removed Response Time 2 second Accuracy 1 mTorr to 10 mTorr 1 mTorr 10 mTorr to 10 Torr 10 10 Torr to 100 Torr 30 100 Torr to 1000 Torr 10 Analog Output 5 mV Standard Resolution 1 mTorr ...

Страница 5: ... and serviced in strict accordance with these safety instructions These safety precautions must be observed during all phases of operation installation and service of this product Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safety standards of design manufacture and intended use of the instrument Televac disclaims all liability for the custo...

Страница 6: ...orr For measurements up to atmosphere mount the 2A sensor in an upright position The sensor should be mounted close to the area where vacuum measurement is desired Failure to mount the 2A in a vertical position will decrease the accuracy of the measurement between 10 Torr and atmosphere but will leave the accuracy below 10 Torr unaf fected Each 2A sensor has a key that only allows the MX2A to mate...

Страница 7: ...ugh the menu or via RS 485 communications To navigate the menu simply use the buttons found on top of the MX2A 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 Using the ENT button allows the user to enable value editing and save values in addition to toggling between options where appropri...

Страница 8: ...anation of Menu Items and Navigation Below is a general explanation of each level of the menu structure of the MX4A 2 5 1 Measurement The measurement screen contains the reading of the sensor in easy to read blue digits and includes units In addition to the digital reading the yellow bar on the measurement screen provides an analog indication of the pressure based on a logarithmic scale At 1000 To...

Страница 9: ...ssure reading at high vacuum zeroing This should be used only when the operator knows that the unit is pumping down below 10 4 Torr and the unit reads a non zero number When the vacuum is below the range of MX2A measurement preferably as low as 10 5 Torr adjust the unit until it blinks between 0000 and 0001 For users calibrating against a NIST calibrated standard maximum accuracy for the MX2A can ...

Страница 10: ... twice to trigger a reset to the factory defaults The default screen resets all calibration point adjustments to the default values This feature should only be used when necessary Warning RESTORING TO DEFAULT CALIBRATION SETTINGS VOIDS THE CALIBRATION F Diagnostic To reach the diagnostic screen Navigate to the calibration screen Press DOWN five times The diagnostic screen is used by Televac techni...

Страница 11: ...ption To change the MX2A between air nitrogen and argon modes Navigate to the calibration screen Press DOWN seven times Press ENT to unlock the gas type screen Press UP or DOWN to change between the gas modes When the appropriate mode is selected press ENT to save and lock the change Figure 3 Graph of MX2A Gas Dependence 2 5 3 Set Points To reach the set point screen Navigate to the measurement sc...

Страница 12: ...en units When the desired unit is reached press ENT to save and lock the change Depending on the process or the region the desired units for the MX2A may vary To accommodate this need the MX2A includes a unit adjustment feature The MX2A can be set to display the units in Torr kPa or mbar 2 5 5 Output To reach the output screen Navigate to the measurement screen Press SEL four times Press UP and DO...

Страница 13: ...ar 1 A Logarithmic The Logarithmic output is the most useful and accurate output for covering the entire range of the 2A with an analog output This format uses the formula below to convert the output voltage into a pressure measurement Press re Torr 10 6 Vo t ge 5 For example a voltage reading of 3 075 Volts corresponds to pressure of 07 Torr 10 6 3 075 5 07 Torr B Linear by Decade The Linear by d...

Страница 14: ...ponding to 01 Torr Press re Torr Vo t ge 1 F Linear 2 The Linear 2 output is one of four linear outputs that cover a select range of the MX2A with a lin ear scale The scale extends from 1 to 100 Torr with each 010 Volt of the output corresponding to 1 Torr Press re Torr Vo t ge 10 G Linear 1 The Linear 1 output is one of four linear outputs that cover a select range of the MX2A with a lin ear scal...

Страница 15: ...nications Settings The communication parameters baud rate address etc are changed through the local menu Please see the section in this manual entitled Explanation of Menu Items and Navigation for more information on navigating and editing within the menu Below are provided some specifics on the RS 485 Communications of the MX2A 3 2 Communications Specifications Table 2 RS 485 Communication Specif...

Страница 16: ...P2H W1 Set pressure units W2 Set SP1L SP1H W3 Set SP2L SP2H W4 Set gas type S1 Read pressure data RC1 Read vacuum adjustment RC2 Read 10 Torr adjustment RC3 Read atmosphere adjustment WC1 Write vacuum adjustment WC2 Write 10 Torr adjustment WC3 Write atmosphere adjustment email sales frederickscompany com tel 1 215 947 2500 web frederickscompany com mx2a_im rev F 15 of 17 ...

Страница 17: ...per to PPSE 0W4xx CR GG Change gas type N2 Nitrogen Air AR Argon 0S1 CR ppse Vacuum reading is ppse 0RC1 CR Baaa Read Vac adjustment 0RC2 CR Baaa Read 10 Torr adjustment 0RC3 CR Baaa Read Atm adjustment 0WC1Baaa CR PPSE Vac adjustment is Baaa reading is PPSE 0WC2Baaa CR PPSE 10 Torr adjustment is Baaa reading is PPSE 0WC3Baaa CR PPSE Atm adjustment is Baaa reading is PPSE Table 5 Understanding the...

Страница 18: ...s Table 7 Error Code Explanations Error Code Description 0N001 Command error invalid character command or number after character 0N002 Units error invalid number received after 0W1 0N003 Set point value error invalid or out of range number after 0W2 or 0W3 0N004 Calibration value error invalid or out of range number after 0WC1 0WC2 0WC3 or 0WC4 0N005 Gas error invalid characters after 0W4 email sa...

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