Digital AVC Instruction Manual
EAR99 Technology Subject to Restrictions Contained on the Cover Page
Page 12 of 17
3.1.3.
Tube Type
Shows the type of gauge tube being measured. This is changed via the DV Select key.
3.1.4.
Current Pressure
Digital display of the current pressure. This flashes
“999 Over Range” when pressure is higher than the
measurable range. If lower than the measurable range, this flashes
“000 Under Range”.
NOTE:
When ambient temperature is lower than calibration temperature, the display can show
negative numbers within limited ranges.
3.1.5.
Pressure Units
Shows the selected pressure units of the displayed pressure reading. This is changed via the Units Select key.
3.1.6.
Power/Enter Key
•
Turns the unit ON or OFF
•
When held during power on, displays the software version
•
When held longer than 3 seconds during power on, temporarily disables Auto-Shutoff
•
Acts as an Enter key in adjustment modes
3.1.7.
DV Select/UP Key
Changes the gauge tube type and functions as the up key in adjustment modes.
3.1.8.
Units Select Down Key
Changes the pressure units and functions as the down key in adjustment modes.
Electrical Connector
Teledyne Hastings vacuum gauge tubes interface with the HPM 4/5/6 via the included octal connector. The
connector is “keyed” so that proper connection is assured (only fits the correct orientation). Always grip the
connector by its cover and not the cable when plugging or unplugging. In some cases, corrosion may build up on
the gauge tube pins. To ensure a good connection and accurate readings, use Scotch-Brite or an equivalent
abrasive to clean the pins when needed.
NOTICE:
Disconnecting the gauge tube by pulling on the cable may result in damage to the octal socket
and/or cable. Always disconnect by pulling on the octal connector directly.