General Information - Teledyne HVG-2020A Instruction Manual

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
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