Fluke Biomedical VT Mobile Getting Started - Manual (Page 23)

Gas Flow Analyzer
Making a Measurement More Accurate
13
Setting the Date and Time
Press
D
Æ C Æ E Æ E to access the date
setting screen. Using the text entry keys, enter the new
date as mm/dd/yy or dd/mm/yy. Then press E to
accept the change.
At this point, press C Æ E to access the time
setting screen. Then use the text entry keys and the
softkeys to enter the time, followed by a press of E.
Checking Version and Serial Numbers
Press
D
Æ C Æ C Æ E to check the version
and serial numbers.
Accessing Help
Use the I key to access context-sensitive help. If
additional text is available off screen, a vertical bar
appears on the right side of the help screen. Use B or
C to scroll through the complete text. Press G to
exit help.
Making a Measurement More Accurate
Warm-up and Zeroing
The Analyzer requires a warm-up period. A five-minute
warm-up followed by a zero and immediate measurement
is adequate for most applications. A 40-minute warm-up
ensures maximum accuracy and stability.
The Zero Warn feature reminds you to zero the
transducers at predefined intervals. Fluke Biomedical
strongly recommends that you leave Zero Warn ON and,
after removing pressure and flow sources, zero the
transducers whenever the Zero Warn message appears.
The Analyzer requires you to zero immediately after
power on. If Zero Warn is ON, the Analyzer prompts you
for an optional zero after the first five minutes and then
after each subsequent 30-minute interval. To zero at the
prompt, place the Analyzer on a flat surface with sensors
disconnected at the Analyzer. Then press G.
Press R at any time to initiate an unprompted zero.
Generally, it is appropriate to zero before any pressure or
flow measurement.