Avocet ALTIMETER 50 Manual - Página 3

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Setup.
When the batteries are installed all display segments show briefly, then the unit goes through a 10-second
countdown before going into the setup sequence. Setup can also be reached from any function by holding both buttons
down more than eight seconds.
ENGLISH OR METRIC
ALTIMETER 50
1.
ENGLISH
CLICK

CADENCE ON/OFF

4.
7
ENGLISH OR METRIC
ENGLISH
Left button selects English or Metric
1. English/Metric Setup.
ENGLISH (feet/miles). Choose METRIC (meters/kilo-
meters) by pressing the left button. Return to English
units by pressing the left button again. Press the right
button to go to wheel size calibration.
Calibration Numbers
Number
Tire Size
English
Metric
20 x 1.75
60.13 in
1528
24 x 1
69.00
1753
24 tubular
69.25
1759
26 tubular
75.93
1929
26 x 1
75.31
1913
26 x 1.25
77.44
1967
26 x 1.5
77.71
1974
26 x 1.9/1.95
80.62
2048
26 x 2.125/2.2
81.65
2074
26 x 1
/
(3-speed) 81.42
2068
3
8
Note: Tire sizes are molded into tire sidewalls. This table is based on popular tire brands
and assumes recommended inflation pressure and a rider weight of 150 lbs. (68 kg). If
your tire size is not included, or if you want to account for your particular combination of
weight, tire pressure, and tire brand, measure your tire circumference according to the
precise calibration method. Lowering tire pressure in a 26 x 1.9 mountain bike tire from
80 psi to 40 psi reduces in-use tire circumference by approximately 1 inch or 25 mm.
S E T U P S E Q U E N C E
WHEEL SIZE CALIBRATION
ALTIMETER 50
2.
CLICK
ALTIMETER 50
RPM
CLICK
S E T U P S E Q U E N C E
The display first shows
calibration default of 83.45 (English) or 2120 (metric)
shows, and an arrow to the right of the numbers points
up then down. Pressing the left button increases the
numbers one at a time when the arrow points up and
decreases them when the arrow points down. Holding
down the left button increments rapidly through the
numbers. Calibration numbers equal tire circumfer-
ence in either inches or mm. Choose a calibration
number from the table or measure tire circumference.
S E T U P S E Q U E N C E
Number
Tire Size
English
mm
700C tubular
82.12 in
700 x 20
81.02
700 x 25
82.13
700 x 28
82.52
700 x 32
83.23
700 x 35
84.21
27 x 7/8
81.77
27 x 1
82.92
27 x 1 1/8
83.58
27 x 1 1/4
84.33
CLIMB OR DESCENT
3.
A
CLOCK SET
ALTIMETER 50
5.
Press the right button to
move from one setup
function to the next.
CLICK
WHEEL SIZE CALIBRATION
Left button increments calibration numbers up
or down depending on arrow direction
2. Wheel Size Calibration.
Precise Calibration.
advantage of the unit's precision, meas-
ure the front tire's "rolling circumfer-
Metric
ence" by the following method.
mm
2083
Mark the ground under the valve
2058
2086
stem when the stem is at its lowest point.
2096
Get on the bicycle and have a helper
2114
push you in your normal riding position
2139
2077
until the valve stem returns to its lowest
2105
point. Mark below the stem again, and
2123
measure the distance between the marks.
2142
This measurement is the rolling circum-
ference of the tire and also the precise
calibration number.
Enter this calibration number, then
press the right button to go to the climb
or descent setup.
6
ALTIMETER 50
CLICK
The wheel size
8
To take full