Specifications
Channel Master Operation Manual
P/N 95B-6001-00 (February 2006) page 27
8.4.3 Pressure Sensor Calibration and Close-up
a. Interconnect and apply power to the Channel Master as described in
“Setup the Channel Master,” page 10.
b. Start the BBTalk program (for help on using BBTalk, see the RDI Tools
User’s Guide).
c. On the File menu, click Break (you can also press the End key to send
a break or use the Toolbar and press the B button). You should see the
wakeup message appear on the log file window.
d. Leave the Channel Master powered up in a temperature-controlled area
for at least one hour so that any temperature gradients within the system
equalize.
e. At the > prompt, type #sc. The Channel Master will respond with:
>#sc
*** CAUTION: These commands are reserved for RDI use
and may not be currently supported!
Input local barometric pressure in inches of mercury:
f. Determine the barometric pressure at your location as accurately as pos-
sible. Use barometric pressure (what your barometer reads, or your
wrist watch barometer reads), not an airport weather forecasting service
altimeter reading that is corrected for sea level pressure.
For example, a barometer reading is 2984. The numbers represent
barometric pressure in hundredths of inches of mercury. Divide this
number by 100 so that it represents barometric pressure in inches of
mercury (e.g., 29.84inHg).
International users may be given the barometric pressure in millibars
(mb) or hectopascals (hPa). The barometric pressure must be entered in
inches of mercury (inHg). To convert between inches of mercury
(inHg) and millibars (mb) or hectopascals (hPa), use the formula
P
inHg
= 0.0295300 x P
mb
.
For example, to convert 1013hPa to inches of mercury (inHg), multiply
1013 x 0.0295300 so that it represents barometric pressure in inches of
mercury (e.g., 29.92inHg).
g. Enter this number in inches of mercury (inHg) at the prompt and press
enter.
h. The Channel Master should respond with:
“Make sure the unit is open to ambient pressure. Hit any key to con-
tinue...”.
i. Press any key to continue.