02/11/98
28
SETTING PEUKERT EXPONENT
Think of the Peukert exponent as the "shrink rate" of your battery bank. As you discharge
your batteries more rapidly, their effective size shrinks. A battery which can supply 200
Amp-hours when slowly discharged over 20 hours may provide only 95 Amp-hours if
discharged rapidly in one hour. The technical description of this "shrink factor" defined by
the Peukert exponent, varies among battery designs.
For your convenience, we've included some common Peukert exponents on Pages 31 and
32 and a technical description including a "do it yourself" method to calculate the Peukert
exponent on Pages 29-30.
When you select Battery Type (See Function F02 on Page 20), your
Link 1000
auto-
matically sets a Peukert exponent which is generally correct. However, your batteries
may have different characteristics than "average" and you may wish to change the expo-
nent so your Time Remaining and Light Bar displays will be as accurate as possible. To
change the Peukert exponent, proceed as follows:
A. Press and hold the SET button for 3 seconds to enter Set Up mode. SEL appears in
the display. Press SEL and notice that the green LED is on.
B.
Continue to press the SEL button until the letters F08 appear in the display. (This
will require eighteen presses of the SEL button.) The right most green light bar indicator
with the legend FUNC under it will be lit.
C. Now press and hold the SET button. If Battery Type is set to #1, the default value
of 1.25 (or the previously programmed value) will appear in the display. If Battery Type
#2 is selected, the default value of 1.11 (or the previously programmed value) will be
displayed. The range of values is from 1.0 to 1.50.
Holding down the SET button will cause the display to increment in 0.01 steps, after 4
increments the display scrolls faster. When the value you want appears, release the SET
button. If you overshoot your capacity you will have to scroll all the way to 1.50 after
which the display will roll over to 1.00 and continue incrementing up.
D. After 10 seconds, if no keys are pressed, the
Link 1000
exits the Set Up mode
and the selected value is stored as the new Peukert's exponent and the display returns to
(Volts).
To Next Page
Loading...
Need help?
General