B700 vario/averager/integrator/audio Web: www.borgeltinstruments.com
Metric or Knots
There is a 2 1/2 digit LCD in the middle of the lower part of the variometer scale.
This shows either the AVERAGER or INTEGRATOR as selected by the pilot.
The range is from at least -10 Knots (-5 M/s) to at least +15 knots (+7.5 M/s)
When climbing, the blue and amber lights are trend comparators between the
AVERAGER and INTEGRATOR .
Ten seconds after beginning a climb, the inner amber and blue lights (one of each)
turn on, rising tones are heard for a short interval * and the lights remain on for 60
seconds after which meaningful values for both running and whole climb average
will have been established.
After that, the light pattern is:
AVERAGER greater than 1.2 x INTEGRATOR, two blue ON
AVERAGER greater than 1.1 x INTEGRATOR, one blue ON
AVERAGER less than 1.1 x INTEGRATOR but greater than 0.9 x
INTEGRATOR , No lights ON
AVERAGER less than 0.9 x INTEGRATOR, one amber ON
AVERAGER less than 0. x INTEGRATOR, two amber ON
When the AVERAGER is less than 0.95 x INTEGRATOR, falling tones are heard
for a short interval. This audio alert will repeat after 20 seconds while this
condition exists and the rate of climb is still positive.
Of course if the current vario reading has decreased markedly and the green light
is out the AVERAGER will follow soon.
Combined with the green light and audio ON/OFF ratio and audio alerts these blue
and amber lights provide useful cues as to whether to remain in the thermal or to
consider leaving.
Whenever the running average (AVERAGER) is greater than the whole climb
average (INTEGRATOR) so far, the whole climb average is improving,
conversely when the running average is less than the whole climb average so far,
the whole climb average must be decreasing. The whole climb average is what
determines your average cross country speed and staying in thermals for too long
once they begin to weaken will hurt your whole climb average. Equally it is
important to center thermals quickly as will be shown by comparing what the
AVERAGER indicates for most of the climb against what the INTEGRATOR
indicates as you leave.
Of course there may be good reason to remain in a weakening thermal if you
suspect it is the last one of the day or there is an extensive dead area to cross.
Pilot discretion must be exercised at all times.
It is up to personal preference as to whether the AVERAGE or the INTEGRATOR
is selected for display. INTEGRATOR determines cross country speed.
AVERAGER is best for setting MacCready for final glide.
The trend system is reset after leaving lift but the INTEGRATOR number is
preserved until ten seconds after entering lift the next time.
When running from the standby AA battery pack, the red light flashes briefly
every two seconds.
*These tones are disabled in current software release.
User Options
As supplied the B700 variometer response is set to "fast"(around 2 seconds time
constant). It may be slowed by gently turning the control marked "response"
clockwise using a small flat blade screwdriver. Maximum is a little greater than
1 0 degrees of movement. This should not normally be necessary and we
recommend you do not adjust this until you have flown with the instrument for
some time.
Also, as supplied the B700 is set to Knots calibration and "competition" mode
Metric calibration requires setting the "mode" control to either end of the range
(Maximum is a little greater than 1 0 degrees of movement). Fully anticlockwise
is Metric with audio set to "B40 Classic" mode where the beeps are always 50%
on, 50% off (the green light still works normally). Fully clockwise is Metric
"competition" mode. Moving about 60 degrees from each stop sets Knots
calibration with the audio mode selection the same as on the stop on that side.
Caution - GENTLY does it. DO NOT FORCE the control against the stop.
Options
It is possible to request the audio set to default zero volume on power up but this
doesn't test the audio to assure it is working! Hence we do not endorse this option.
Rear Seat Repeater
Rear seat repeater is available in either 57mm or 0mm size which appears
identical in form and function to the variometer and is in the same size enclosure.
This is connected to the variometer by a supplied 3 meter shielded cable. The
operational controls and indications are the same as those on the variometer. Note
that when changing audio modes the lights only flash on the unit on which the
change is being selected but the audio mode is changed on the variometer anyway.
The AVERAGE/INTEGRATOR selections are independent of each other.
Operating the audio volume controls in opposite directions at the same time may
result in unexpected audio volume selections.
WARRAN Y
If, under normal operating use, any part of the Borgelt Instruments hardware proves to be defective in
material and/or workmanship within the warranty period of twenty-four months from date of purchase
such defective parts and/or workmanship will be repaired by Borgelt Instruments or their approved
agent. All freight charges are to be borne by the owner. This warranty is not transferrable. This
warranty does not cover damage caused by misuse, neglect, accident, reversal of polarity or repair or
attempts to repair by unauthorized personnel.
Any returns must be authorised by Borgelt Instruments prior to shipping.
Designed & manufactured by: Borgelt Instruments Tel: 07 4635 5784
O Box 4607 Toowoomba East QLD 4350 Australia or Tel: + 61-7 4635 5784 outside Australia
