Alnor APM 150, Owner'S Manual, Page: 23 / 78

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The downloaded data will now appear in the
application. Now you are able to save the data.
5. From the File menu, choose Save As.
6. Enter the filename under which you will store
the data.
7. Choose the
OK
key.
Serial Communication Through
Windows 95
• Click on
Hyperterminal.exe
located in the
accessories menu.
• If a box comes up requesting modem installation,
click
No
.
• Enter a name (TSI) and choose an icon for meter
downloading to the PC, click OK.
• Connect using
Com1
connection, click OK.
• Set port settings under
Com1 Properties
to
1200BPS, 8 data bits, no parity, stop bits 1, and
Flow Control
to
None
, click OK.
• Click
File
and choose
Properties.
• Click on
Settings
, choose
ASCII
set up. Verify
checkmark for
Terminal Keys
,
Emulation
to
Auto Detect
, and
Backscroll Buffer Lines
to
500
.
• Place a check mark under
ASCII Receiving
in
the boxes marked
Append Line Feeds
•
To Incoming Line Ends
and
Wrap Lines That
Exceed Terminal Width
, click OK.
• Click OK again to exit
Properties
.
•
Hyperterminal
is now ready to receive
information from the meter.
• Save terminal configuration for future use.
APPENDIX D:
CORRECTION FACTORS FOR THERMO-ANEMOMETERS
TO ACTUAL CONDITIONS
Velocity is generally expressed in one of two
ways: actual (true) velocity or standard velocity.
Actual velocity is the average speed at which the
molecules are traveling. Standard velocity is
referenced to standard conditions and is equal to
the actual velocity of the air only when the air is at
standard density. The calibration facilities at TSI
Incorporated adjust the actual velocity so that the
same number of molecules per unit time is passing
over the heated elements as if the density were
standard density. This makes the instruments
display standard velocity.
To correct the standard velocity to actual velocity
use the equation below.
V
a
= V
std
x CF
V
a
= Actual velocity
V
std
= Standard Velocity (this is displayed
by the instrument)
ρ
std
= Standard density 0.075 lb/ft
3
(at 70
°
F
and 29.92 in Hg)
ρ
a
= Actual density in lb/ft
3
CF =
ρ
std
/
ρ
a
(Correction Factor)
For your convenience we have made a chart for
determining the correction factor given
temperature and pressure.
Note: The atmospheric pressure as reported by
the National Weather Service is corrected
to sea level and can not be used if
measurements are not at sea level.
For more information on calculating local air
density, call customer service at TSI.