HVG-2020A Instruction Manual
Page 9 of 29
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.