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HVG-2020A Instruction Manual

 

Page 22 of 29 

S112=

 Verbose Replies (Write Only) 

Enables (Non-Zero value) or disables (0) Verbose Replies. 

ENABLE VERBOSE 

Display descriptive text and units. Same as S112=1. 

DISABLE VERBOSE

 Display values only. Same as S112=0. 

ENABLE RS485 

Configure the serial port for RS485 communication 

DISABLE RS485 

Configure the serial port for RS232 communication 

IS485TERMINATED

 Read whether termination resistors are engaged 

NOTERMINATERS485

 Disable termination resistors on RS485 communications 

TERMINATERS485

 Enable termination resistors on RS485 communications 

RESTOREFACTORYDEFAULTS

 Reset variables to the values stored at the factory. 

 

Reset values include: Product config (S64), Piezo calibration curve settings, Temperature 

settings, Analog output settings 

TDAO

 DAC zero output

 

 In calibration mode, generate output voltage equivalent to the DAC zero code (S51). 

TDAS 

DAC span output

 

In calibration mode, generate output voltage equivalent to the DAC full scale code (S52). 

TDAZ 

DAC zero count output

 

In calibration mode, generate output voltage equivalent to 0 counts to the DAC. 

TOFF 

DAC adjust complete

  

In calibration mode, write the D/A converter values to memory. 

ZERO

 Set Pressure Zero 

Sets S15 UB Zero and S16 DB Zero to the current bridge power readings.  The effect of this is 

the current pressure reading becomes the zero pressure point. 

ZRO

 Alias for ZERO 

For backward compatibility. 

 

 

Содержание HVG-2020A

Страница 1: ...HVG 2020A INSTRUCTION MANUAL I S O 9 0 0 1 C E R T I F I E D www teledyne hi com ...

Страница 2: ...n which if not avoided could result in death or serious injury Do not proceed beyond a WARNING notice until the indicated conditions are fully understood CAUTION indicates a hazardous situation which if not avoided could result in minor or moderate injury Do not proceed beyond a CAUTION notice until the indicated conditions are fully understood and met NOTICE calls attention to a procedure or prac...

Страница 3: ...wer Input 10 2 3 3 Analog Output 10 2 3 4 Setpoints 11 2 3 5 Serial Connection 12 2 3 6 USB Connection 12 2 3 7 TTL Serial Connection 12 PUSH BUTTON OPERATION 13 LED OPERATION 13 QUICK START 14 3 DISPLAY OPERATION 15 GENERAL 15 VIEW ICON 15 MENU BUTTON 16 3 3 1 Screen Orientation 17 3 3 2 Set Zero 17 3 3 3 Device Info 17 3 3 4 Analog Output 17 3 3 5 Serial Port 17 3 3 6 Restore Factory Defaults 17...

Страница 4: ...32 RS485 Mode 20 5 2 7 Response Format 20 5 2 7 1 Response Line Termination 20 5 2 7 2 RS485 Mode Responses 21 5 2 8 Commands 21 5 2 8 1 Reporting Commands 21 5 2 8 2 System Commands 21 5 2 8 3 State Commands 23 5 2 8 4 Sensor List Commands 24 6 TROUBLESHOOTING 27 AUTHORIZED MAINTENANCE 27 TROUBLESHOOTING 27 6 2 1 Instrument Lists and Codes 27 6 2 2 Possible Problems and Solutions 27 7 WARRANTY 28...

Страница 5: ...n The HVG 2020A VISION offers an additional color touch panel display The piezo resistive transducer exhibits excellent stability and its output is characterized and digitally linearized to provide superior accuracy The pressure signals are made available on the digital port and display The signal is also converted to the desired analog signal 0 1 VDC 0 5 VDC 0 10 VDC 0 20mA or 4 20 mA and this si...

Страница 6: ...eal vacuum connections eliminates the permeation degradation and outgassing problems of elastomer O rings FLEXIBLE POWER REQUIREMENTS The HVG 2020A can operate with any power supply capable of providing 12 36 VDC via the 9 pin D connector or a 2 mm bayonet jack connection DIGITAL COMMUNICATIONS The HVG 2020A is equipped with RS232 RS485 and USB for digital communications The USB connector serves a...

Страница 7: ... Temperature 20 C to 70 C WARNING Operation above 60 C ambient may result in case temperatures capable of causing burns Operation near the temperature extremes for more than 48 hours could result in display degradation Humidity 30 to 90 RH non condensing Thermal Zero Shift 8 Torr over 20 to 70 C range Thermal Span Shift 0 6 of reading over 20 to 70 C range Leak Integrity 1x10 9 std cc s Analog Out...

Страница 8: ...is also available without display 1 3 2 Cables The HVG 2020A instruments come with a 9 pin D connector A Hastings cable Part CB AF 8 HVG9M is available to interface with the standard 15 pin D connector found on Hastings power supplies Cables are available from Hastings in various lengths as well A variable length cable with bare leads Part CB LDS XXX HVG9M is also available Serial communications c...

Страница 9: ...ments a Hastings filter or special adapter may be needed Please contact the Hastings Instruments Sales Department for assistance in your system configuration Mount in such a way as to minimize vibration WARNING If devices employing gaseous electrical discharges are present in the vacuum system the discharge may couple dangerous high voltage through the gas in the chamber directly to ungrounded con...

Страница 10: ...VDC power jack The center pin polarity is positive and is internally connected to pin 3 of the D connector The sleeve is internally connected to pin 4 of the D connector The gauge requires a maximum of 2 watts for proper operation Surge suppressors are recommended to prevent power spikes reaching the instrument Hastings power supplies satisfy these power requirements 2 3 3 Analog Output The analog...

Страница 11: ...eater when using 0 20mA and 4 20mA output signals NOTE 0 20mA cannot indicate a negative zero offset 2 3 4 Setpoints The HVG 2020A has two open drain setpoints available on the 9 pin D connector The Hi setpoint will be active when the pressure is above its set value and the Lo setpoint will be active when the pressure is below its set value There is a small amount of hysteresis built into the sett...

Страница 12: ...rument with these resistors enabled on any one cable run as this will load down the cable Hastings ships RS485 instruments without the resistors enabled The default port set up is 19 2K baud 8 data bits 1 stop bit no parity and no flow control A carriage return signals the end of command input The end of a response message from the HVG 2020A is signaled by a character See Serial Communications sec...

Страница 13: ...cuum LED Pressure 1000 Torr Steady Green Flash Yellow at 1 sec rate Pressure 800 Torr Steady Green Steady Yellow Pressure near 760 Torr Steady Green Steady Green Pressure 700 Torr Steady Green Flash Green at 1 sec rate Duty cycle proportional to pressure Pressure 2 Torr Steady Green Flash green at 2 sec rate Main Board Comm Error Steady Red Flash Red at 1 sec sate Piezo Sensor Failure Flash Red at...

Страница 14: ...ed in any orientation However if condensation is likely to occur then the tube port should be orientated downward 5 When installing 1 8 NPT style transducer tube use the wrench flats 6 Attach cable 7 With the vacuum chamber at atmosphere turn on the power supply Gauge is now reading pressure 8 For best accuracy the gauge should now be zeroed Pump the vacuum system down to less than 0 1 Torr Ideall...

Страница 15: ...lus pencil eraser fingernail gloved finger etc However it can only detect one touch location at a time The touch panel top layer is made of polyester or polyethylene terephthalate PET NOTICE Do not apply excessive pressure liquids or sharp objects to the touch screen to avoid damage To clean the display breathe on the surface and gently wipe it with a soft cotton or microfiber cloth VIEW Icon The ...

Страница 16: ...nd Lo with a downward arrow Green means the setpoint is active and red means inactive If the set point values are made to be off scale the arrows will not be displayed 5 History Graph View A graphical indication of the pressure over time Touching the screen anywhere will bring up a screen allowing the user to adjust the time in seconds per sample displayed point Use the left right arrows to select...

Страница 17: ...n levels 3 3 4 Analog Output The user may select 0 1 V 0 5 V 0 10 V 0 20 mA or 4 20 mA 3 3 5 Serial Port The user may select either RS232 or RS485 serial communications After selecting the type pressing the arrow icon will take the user to the baud rate selection There are 5 baud rates available 9600 19200 38400 57600 and 115200 If RS485 was selected additional sub menu screens will appear allowin...

Страница 18: ...ion WARNING The HVG 2020A does not have a high pressure option and is only rated for a maximum operating pressure of 20 PSIA Using the instrument above its rated maximum overpressure of 40 PSIA 25 PSIG could result in damage to the instrument or alter its behavior WARNING Do not install a weld stub terminated gauge in an O ring sealed quick connect fitting if system pressure could exceed atmospher...

Страница 19: ...TTL connection information 5 2 2 Serial Communication Software Serial Communication Software running on a host computer is required to access the serial port All such programs need to be configured to communicate with the instrument the required parameters are Baud Rate Bits per second the number of data bits 8 Parity None Number of Stop Bits 1 and Flow Control None 5 2 3 The Sensor List Most of t...

Страница 20: ...ed in the format NN where NN is the two digit hex address stored in S5 of the target device As an example if you want to read the Sensor List from the device with address 0x02 send the command 02 SL The HVG 2020A will accept a one digit address but this could cause problems 2 SL will work the same as 02 SL but 2 A will be interpreted as 2A which is addressing device 2A not 2 A returns the device a...

Страница 21: ...sure readings to be output every 1 2 second P0 Stop Pressure Streaming Stops the 1 2 second pressure reading output 5 2 8 2 System Commands A Device Address Read Write The RS485 address also given in S5 For backward compatibility The same as S5 BAUD Write Only Set the baud rate Sets the baud rate and stores it in non volatile memory Valid options are 9600 19200 38400 57600 and 115200 H High Setpoi...

Страница 22: ...LTS Reset variables to the values stored at the factory Reset values include Product config S64 Piezo calibration curve settings Temperature settings Analog output settings TDAO DAC zero output In calibration mode generate output voltage equivalent to the DAC zero code S51 TDAS DAC span output In calibration mode generate output voltage equivalent to the DAC full scale code S52 TDAZ DAC zero count...

Страница 23: ...00 PIEZO_STATUS_ERROR 0x2000 PIEZO_OVER_LIMIT ML Status Alias This is an alias for the STATUS command for backward compatibility HISTORY System Error Status History Returns any Status errors that have occurred since system reset CLEAR HISTORY Clears the Status History FAIL CODES System Fail codes Returns all System Status Failure codes which have occurred since the device left the factory or since...

Страница 24: ...t the current address of a device when it is not known S14 Number of Decimal Places Read Write The number of decimal places displayed for floating point values Valid values are 0 to 7 This setting is reflected in the lower 3 bits of S2 S18 Sensor Temperature Read Only The current sensor board temperature S20 Low Relay Set Point Read Write This is the value below which the low setpoint will become ...

Страница 25: ...essure If in CALIBRATE state SS8 writes value to RAM and Sets the Analog Output to the level representing 100 pressure otherwise writes value to RAM and FLASH Range is 0 to 65535 Defaults are as follows 0 to 5 V 1 to 5V 47654 0 to 10 V 62545 0 to 20 mA 4 to 20mA 54670 S53 Analog Output Full Scale Factory Read Write The Analog Output D A value used to represent 100 pressure If in CALIBRATE state SS...

Страница 26: ...xt field which accepts a maximum of 63 characters S75 Control Board Id Factory Read Only The Hex ID and Software Version of the Control Board PFS Piezo Full Scale Factory Read Write The pressure at which the analog output will be at its full scale value If PFS 1000 at 1000 Torr the analog output will be 10 V for a 0 10V unit or 20mA for a 4 20mA unit PSF Piezo Span Factor Factory Read Write The fa...

Страница 27: ...Also issues that may have occurred are recorded in memory and may be accessed using the commands STATUS HISTORY and FAIL CODES See Commands section above 6 2 2 Possible Problems and Solutions Symptom Not able to communicate digitally Action Check settings as found in Serial Communications section above Make certain baud rate and 232 485 operation are correct If using RS485 with a long cable run ma...

Страница 28: ...erial Authorization RMA form RMA Forms may be obtained from the Information section of the Hastings Instruments website http www teledyne hi com inforeq htm WARNING Contaminated parts can be detrimental to health and environment Ensure instruments are free of hazardous contamination prior to shipment Company contact information TELEDYNE HASTINGS INSTRUMENTS 804 NEWCOMBE AVENUE HAMPTON VIRGINIA 236...

Страница 29: ...HVG 2020A Instruction Manual Page 29 of 29 8 Drawings ...

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