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HVG-2020B Instruction Manual
3.3.1. Screen Orientation
The top of the screen is indicated and will rotate 90° each time the screen is pressed.
3.3.2. Set Zero
The Set Zero menu will set the pressure reading to zero and should only be done if the actual pressure
is known to be well below 1x10
asking if the user is certain they want to do this operation.
3.3.3. Device Info
The user may view the serial number, analog output setting, calibration date, gauge type, the I/O and
main board firmware revision levels, and current system errors.
3.3.4. Analog Output
The user may select non-linear, linear or logarithmic output. If logarithmic is selected, the user may
select a given full scale/slope combination or a custom option. The custom selection must be set using
serial communications.
The user may then select voltage or current output range: 0–1 V, 0–5 V, 0–10 V, 0–20 mA or 4–20 mA.
3.3.5. Gas Select
The user may select from the available gas options Refer to section 4.5 for specific values of the gas
selections. The user may select a pre-defined gas or a custom gas. The custom selections must be set
using serial communications.
The gases are as follows: Nitrogen, Air, Helium, Argon, Hydrogen, CF4, SF6, Custom 1, Custom 2
3.3.6. 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
allowing the user to select the address and termination resistor state. At the end of the selection sub-
menus, the user can accept or canel the selections shown.
3.3.7. Restore Factory Defaults
This selection allows the user to reset the configuration of the gauge back to its original factory setup.
A warning screen will appear asking if the user is certain they want to perform this operation.
EAR99 Technology Subject to Restrictions Contained on the Cover Page
-4
Torr. If the pressure reading is too large, a warning screen will appear
Page 23 of 40
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