Fluke Biomedical VT Plus HF - Manual (Page 36)

VT Plus HF
Operators Manual
2-8
Note
The option displayed when exiting the settings screen is saved and used for
future measurements.
The following is a description of each setting.
Gas Settings
This setting tells the Analyzer what type of gas is flowing through the high- and low-flow
ports. The Analyzer uses this information to improve the accuracy of the flow
calculations.
Note
Failure to enter the correct value causes the flow and volume calculations
to be in error.
To modify the gas settings:
1. From the
Setup menu, highlight Settings and press the ENTER soft key.
2. Highlight Gas Settings and press the MODIFY soft key.
Depending on the option, a value can be pre-selected or input from the keypad. The
following is a description of each of the options.
Gas Type
The possible values for Gas Type are shown in Table 2-1.
Table 2-1. Gas Type Values
Value Description
Air Standard room air
N2 100 % Nitrogen
N2O 100 % Nitrous Oxide
CO2 100 % Carbon Dioxide
O2 100 % Oxygen
Heliox 30 % Oxygen and 70 % Helium blend
N2O bal O2 Measured Oxygen balance Nitrous Oxide
He bal O2 Measured Oxygen balance Oxygen Helium
N2 bal O2 Measured Oxygen balance Nitrogen
User Defined User selects custom gas mixture. This option requires the VT for Wondows
PC software.
Note
For balance gas settings, the oxygen concentration is measured using the
Analyzer oxygen sensor located on the high-flow port. If the low-flow port
is to be used, allow gas to flow through both high- and low-flow ports so
that the oxygen can be measured.
To modify the gas type: