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Instruction Manual
VGC301 Controller
BAUD [Factory default = 19,200]
This sets the baud rate for the RS485 and the RS232 serial communications. The baud rate can be set to various
values through the serial interface or via the front panel soft-keys. The parity can only be changed through the
serial interface command set. When this occurs, the current setting will be shown in the list of choices and can
be re-selected if changed.
RS485 Type [Factory default = 2 WIRE]
Selects 2-wire or 4-wire configuration for RS485 interface.
ANALOG TYPE [Factory default = LOG 1-8 ]
Select one of the following analog output types based on your system requirements
(See
section 7.0
for more details to determine which analog output type to use).
a) LOG 1-8. This selection provides a 1 to 8 Vdc log-linear analog output with 1 V/decade.
b) LOG 0-7. This selection provides a 0 to 7 Vdc log-linear analog output with 1 V/decade.
c) NONLIN 6V. This selection provides a non-linear (S-Curve) analog output from 0.3751 to 5.6593 Vdc.
d) NONLIN 9V. This selection provides a non-linear (S-Curve) analog output from 0 to 9 Vdc.
e) LINEAR. This selection provides a 0 to 10 Vdc linear analog output with a useful range over 3 decades.
SET LINEAR [Factory default = 0.01 VOLTS to 10 VOLTS corresponding to 1 mTORR to 1 TORR]
If you have selected LINEAR in the ANALOG TYPE menu above, then configure the linear analog output scaling
using the following parameters in the SET LINEAR menu.
(See section 7.9
for more details).
a) Set the minimum pressure
b) Set the minimum voltage corresponding to the minimum pressure
c) Set the maximum pressure
d) Set the maximum voltage corresponding to the maximum pressure
The linear output voltage can be any value between 0.01 Vdc and 10 Vdc corresponding to pressures between
1 mTorr and 1000 Torr. However, the useful range of the linear analog output is three decades.
INFO
This screen shows the unit firmware version.
4.3
Return to Factory Default Settings
You can reset all values to the original factory default settings by simultaneously pressing the upper left and
upper right soft-keys. The user will then be prompted to "Set Factory Defaults?" Choose Yes or No.
InstruTech, Inc.
Page 14
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