Teledyne HVG-2020A User manual

HVG-2020A
INSTRUCTION MANUAL
ISO 9001
CERTIFIED
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HVG-2020A Instruction Manual Page 2 of 29
Manual Print History
The print history shown below lists the printing dates of all revisions created for this manual. The revision level
letter increases alphabetically as the manual undergoes subsequent updates. Each new revision includes a
revised copy of this print history page.
Revision A (Document Number 180-092018)...............................................................................September 2018
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Description of Symbols and Messages used in this manual
WARNING: indicates a hazardous situation, 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 practice that if not correctly performed or adhered
to, could result in equipment damage, loss of data, or inaccurate data.
NOTE:is used for tips and other digressions.
Hastings Instruments reserves the right to change or modify the design of its equipment without any
obligation to provide notification of change or intent to change.

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Table of Contents
1. GENERAL INFORMATION ....................................................................................................5
FEATURES..................................................................................................................6
SPECIFICATIONS ............................................................................................................7
ACCESSORIES...............................................................................................................8
1.3.1. Power Supplies...................................................................................................8
1.3.2. Cables .............................................................................................................8
2. INSTALLATION AND SETUP.................................................................................................9
RECEIVING INSPECTION.....................................................................................................9
MECHANICAL CONNECTIONS ................................................................................................9
2.2.1. Mounting..........................................................................................................9
2.2.2. Plumbing..........................................................................................................9
ELECTRICAL CONNECTIONS ............................................................................................... 10
2.3.1. Connector....................................................................................................... 10
2.3.2. Power 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
4. GENERAL OPERATION ..................................................................................................... 18
OPERATING CONDITIONS ................................................................................................. 18
ZERO CHECK ............................................................................................................. 18
POSITIVE PRESSURE OPERATION.......................................................................................... 18
TEMPERATURE AND HUMIDITY EFFECTS................................................................................... 18

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5. DIGITAL OPERATION....................................................................................................... 19
INSTRUMENT STATES ..................................................................................................... 19
SERIAL COMMUNICATIONS ................................................................................................ 19
5.2.1. General.......................................................................................................... 19
5.2.2. Serial Communication Software............................................................................ 19
5.2.3. The Sensor List................................................................................................. 19
5.2.4. Command Prompt ............................................................................................. 19
5.2.5. Command Format ............................................................................................. 19
5.2.6. RS232 / 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
WARRANTY POLICY....................................................................................................... 28
RETURN POLICY.......................................................................................................... 28
8. DRAWINGS ................................................................................................................... 29

HVG-2020A Instruction Manual Page 5 of 29
1. General Information
The HVG-2020A is a small, low cost electronics module which provides the user with accurate vacuum
measurements over the range of 0.1 to 1000 Torr. The piezo-resistive type sensor has one side of its sensing
element evacuated to a low reference pressure then sealed to produce an absolute pressure signal output. This
output signal is proportional to the applied pressure and is independent of gas composition. The sensing
package utilizes silicone oil to transfer pressure from a stainless-steel diaphragm to the sensing element. Only
the stainless-steel diaphragm is exposed to the vacuum.
The HVG-2020A is designed for quick, easy installation and will provide the user with long lasting, trouble free,
reliable vacuum measurement. The electronics can be powered by a power supply capable of delivering any
voltage between 12 VDC to 36 VDC.
The HVG-2020A instrument has a modular PCB design that allows for flexibility in available features and options
for OEM applications. This includes analog output via a 9-pin D connector, additional 4 conductor 3.5 mm TRRS
jack and USB virtual COM port for digital communication. 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 signal is presented to the D connector.
Hastings vacuum instruments do not require any periodic maintenance under normal operating conditions with
clean gases. No damage will occur from the use of moderate overpressures (< 25 psig).
The following sections contain the steps needed to get a new vacuum gauge operating as quickly and easily as
possible. Please read the following thoroughly before attempting to install the instrument.
NOTICE:The instruments described in this manual may be available with multiple pin-outs.
Ensure that all electrical connections are correct.
NOTICE:The instruments described in this manual are designed for INDOOR use only.
NOTICE:The instruments described in this manual are designed for Class 2 installations in
accordance with IPC standards.
CAUTION: There are no operator serviceable parts or adjustments inside the product.
CAUTION: If this equipment is used in a manner other than that specified, the protection
provided by the equipment may be impaired.

HVG-2020A Instruction Manual Page 6 of 29
Features
COLOR DISPLAY WITH TOUCH PANEL.The HVG-2020A has an optional integrated touch panel color LCD
display. This gives the user easy configurability, stand-alone operation and local control over the instrument.
SUPERIOR ACCURACY.The output of the piezo-resistive sensor is thermally compensated and linearized to
provide accuracy of ± (0.1% of reading + 0.5 Torr), and better than ± (0.6% of reading + 0.5 Torr) over the
entire operating temperature range after zero adjustment.
GAS INDEPENDENT.The piezo-resistive sensor is media isolated and provides a direct pressure measurement
that is gas species independent.
300 SERIES STAINLESS STEEL.The vacuum envelope of the HVG-2020A is entirely 300 series stainless steel
with welded construction. Using metal seal 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 as a virtual COM port for serial communication, eliminating the
need for a USB to Serial converter.
ANALOG OUTPUTS.The pressure is available as a linear voltage or current analog signal. The 0-20 mA or 4-20
mA current option gives the user the advantages of a current loop output to minimize environmental noise
pickup and signal loss over long cable runs.
TTL ALARMS.Two alarm signals are provided with an open-drain configuration, one to indicate when pressure
goes above a value and the other below a value.
LED INDICATORS.Two LEDs provide instrument status and system pressure information.

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Specifications
WARNING: Do not operate instruments exceeding the specifications listed below. Failure to
heed this warning could result in serious personal injury and/or damage to the equipment.
Range: 0.1 Torr to 1000 Torr
Accuracy: ± (0.1% of reading + 0.5 Torr) includes non-linearity, hysteresis,
repeatability at ambient operating temperature without
temperature/humidity effects after 2 hours warm up followed by zero
adjustment
Warm up time: Within rated accuracy at atmosphere: 30 minutes (typical)
For zero adjustment: 2 hours (typical)
Installation orientation: any
Internal volume: 0.6 cc (1/4” stub tube, other connections will be larger)
Maximum Pressure: Maximum operating: 1000 Torr
Maximum overpressure:2000 Torr / 25 psig (no change in performance)
Burst pressure: 3000 Torr / 45 psig
Operating 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 Output: 0-1 VDC, 0-5 VDC, 0-10 VDC (short-circuit protected, 1 kΩ min load)
0-20 mA, 4-20 mA (short-circuit protected, 1.2 kΩ max load)
Power Requirements: With display: 2 watts max. / 12 to 36 VDC (1.5 W typ. @ 24 VDC)
No display: 1.8 watts max. / 12 to 36 VDC (1.3 W typ. @ 24 VDC)
Class 2 power 150 VA max fused
NOTICE: Use of an underpowered or under-voltage supply could result in equipment damage.
WARNING:Do not power with isolated drive circuits that are more than 36 volts above ground
potential or could reach 36 volts in the event of a fault. Failure to heed this warning could
result in serious personal injury and/or damage to the equipment.

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Response Time: < 100 ms
CE Mark EN55011, EN61326, EN61010
RoHS Compliant YES
Wetted Materials: 304 and 316 stainless steel
Weight (approx.): 0.4 lb. (0.18 kg)
Set points: open-drain configuration (5 V / 5 mA max input)
Connectors: 2mm bayonet-style power jack (power)
9-pin “D” connector (power, analog signals, TTL serial)
3.5 mm TRRS jack (RS232/485 serial communications)
USB micro-B (virtual COM port for serial communications)
Accessories
1.3.1. Power Supplies
Hastings power supplies are available in one or four channel versions. They convert 100, 115 or 230VAC
to the voltage required to operate the vacuum gauge, provide a digital indication of the pressure.
Interface terminals for the analog output signals are located on the rear of the panel as well.
A separate 24VDC power supply (P/N 12-01-169) 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 cables are available from Hastings (Part # CB-RS232-TRRS). These cables
connect from the 4-conductor 3.5 mm TRRS jack on top of the gauge to a standard 9-pin D connector
used for serial communication on older computers and other adaptors.
A USB cable is available from Hastings (Part # CB-USB-MICRO-B) that will connect from the Type-A
receptacle found on most computers to the Micro-B connector found on the HVG-2020A instruments.
This cable is 6 feet in length and includes ferrites for increased RF immunity.
More information about the power supplies and cables can be found on the Hastings web site:
http://www.teledyne-hi.com

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2. Installation and Setup
This section contains the necessary steps to assist in getting a new vacuum gauge into operation as quickly and
easily as possible. Please read the following thoroughly before attempting to install the instrument.
Receiving Inspection
Prior to opening, inspect for obvious signs of damage to the shipment. Immediately advise the carrier who
delivered the shipment if any damage is suspected. If the shipment has arrived intact, carefully unpack the
gauge and any accessories that have been ordered. Check each component shipped with the packing list.
Ensure that all parts are present (i.e. gauge, power supply, cables, etc.). Optional equipment or accessories
will be listed separately on the packing list.
Mechanical Connections
2.2.1. Mounting
NOTICE: The gauge should be installed in a clean and careful manner. Take care not to drop the
product and avoid impacts to prevent damage.
The HVG-2020A gauge may be mounted in any position, though care should be taken to prevent objects,
particles or condensate from dropping inside the gauge if mounted upside down.
Using bare hands to touching components that are exposed to the vacuum will result in increased desorption
rate and can possibly interfere with proper sealing.
Contamination can impair the operation of the gauge. If your vacuum environment is highly contaminated or
has unique fitting requirements, 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 conductive surfaces or electrical conductors. Seriously injury or death
can occur from contacting exposed ungrounded conductive surfaces/conductors at high
potential.
Ensure that the vacuum port to which the gauge is mounted is electrically grounded. It is
essential for personnel safety as well as proper operation that the envelope of the gauge be
connected to a facility ground. Vacuum connections that use an O-ring for a seal such as a KF
type flange or a quick connect fitting may electrically isolate the surfaces on the other side of
the connection. This may also occur on an NPT fitting if PTFE tape is used on the sealing
surfaces. In these conditions add a ground lug on a flange bolt to provide a ground path back
to a protective earth terminal.
WARNING:If poisonous or injurious gases have been used in the vacuum system, ensure that
all residues have been evacuated or flushed with inert gas before opening the system to install
the gauge tube.
2.2.2. Plumbing
Mount the gauge as close as possible to the to the pressure area of interest. Long or restricted tubing will
create a pressure difference between that area and the gauge. Mounting too close to gas sources can also
affect pressure measurement.

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The HVG-2020A can come with any of several vacuum connections, including: 1/8” NPT, ¼ VCR, ½” VCR, KF-
16, KF-25, 1.33” CF, 2.75” CF and ½” smooth stub tube. The tube is configured with the vacuum fitting
requested.
NOTICE:When installing the 1/8” NPT version, be certain to use the ½” wrench flats. Do not tighten
using the aluminum housing as a grip or damage may result.
WARNING: Do not exceed the pressure rating of the instrument. If operating near the maximum
operating pressure, ensure there is a pressure relief valve in the system.
Electrical Connections
WARNING: Care must be taken to avoid any high voltages that may be present when dealing
with power supplies.
2.3.1. Connector
The HVG-2020A 9 pin “D” connector pin assignments are listed here.
2.3.2. Power Input
The HVG-2020A has its own internal switching power supply and requires
between 12 and 36 VDC input voltage. The +VDC supply is pin 3 and the –
VDC return is pin 4. Case ground is pin 6.
NOTICE: Either the base or pin 6 must be connected to ground for proper noise immunity and to meet
CE Mark standards.
There is also a 2mm barrel connector available as a 24 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 signal output is configurable via digital communications. See the instrument label to determine how
the instrument was configured at the factory. In Hastings power supplies, the analog output is routed to the
display and is also available at terminals on the rear panel. If a Hastings supply is not used, the output is
available on pin 5 of the “D” connector.
The standard output of the pressure meter is a 0-10 VDC signal proportional to the pressure. Analog output
voltage is available on pin 5 and referenced to analog common on pin 8. The voltage output may be set to 1, 5
or 10 volts full scale. The standard value is 10 volts and will have been set as such unless another value was
specified at time of order. The analog full-scale settings can be changed in the field with digital commands.
Pin #
1
High Setpoint
2
Low Setpoint
3
+ Power (12-36 VDC)
4
Power/Digital Common
5
Analog Output
6
Case Ground
7
Tx out (TTL)
8
Analog Common
9
Rx in (TTL)