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VT Plus HF
Operators Manual
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Specifications
The following are general, performance, breath parameter accuracy specifications for the
Analyzer.
General Specifications
Display ................................................... 320 x 240 LCD with CFL backlight
Viewing Area ......................................... 3 in x 4 in (10.1 cm x 8.2 cm) Blue on white background
Operational Modes ............................... Manual mode for simple tests or troubleshooting; computer-control
Output Ports.......................................... RS232 serial port and parallel-printer port
Operating Environmental Conditions
Storage Environmental Conditions
Power Requirements
1-10
Table 1-6. Functions (cont.)
Name
ZERO/7 Key
SETUP/8 Key
PARAMETERS/9 Key
Temperature Range........ ................ 10 °C to 40 °C
Ambient Humidity................... ......... 0 - 80 % non-condensing to 31 °C, decreasing to 50 % at 40 °C
Barometric Pressure........................ . 8 to 18 psia
Vibration .......................................... Devices intended to be used on tabletop or other stable surface.
Temperature Range ........................ -25 to 50 °C
Humidity........................................... 0 to 95 % non-condensing °C
Maximum Over-voltage ................... 264 V ac
Input Voltage Range ....................... 100 to 240 V ac
Input Frequency Range ................. 50/60 Hz
This key initiates the zero function in the Analyzer. All of the
pressure and differential pressure (flow) sensors in the Analyzer
must be periodically zeroed or calibrated to a zero reference.
When zero is selected, the device measures the zero value of
the selected signal for flow measuring. The Analyzer can be set
to periodically call of the zero function. Refer to System Setup
for Zero Mode Descriptions. This key is also the 7 key for
numeric data entry.
This key accesses the Analyzer configuration and setup
screens. When this key is pressed, a menu is displayed. The
soft keys are used to navigate the menu. From this menu, other
sub-menus are accessible to adjust the various configuration
settings. The details of this menu and its sub-menus are
described later. This key is also the 8 key for numeric data entry.
This key selects which of the breath parameters are displayed in
the various modes. Each mode screen has space to display 4 of
the breath parameters. Using the parameters function, the four
breath parameters can be selected. Note that if 4 parameters
are already selected, then no more can be selected until one of
the previously selected parameters is cleared. Also note that the
parameters that are selected only apply to the screen that the
Analyzer was in when the parameters key was pressed. This
key is also the 9 key for numeric data entry.
mode, using RS232 serial port for special applications; use of Analyzer
with VT for Windows PC software for recording graphs and logging
data to a computer
Function
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