User Calibration - Skyrc MC3000 Instruction Manual

USER CALIBRATION

Very similar to the technology of a modern digital multimeter, the microprocessor of MC3000
measures the actual battery current (in series) and the actual battery voltage (in parallel) directly
at the battery in order to control and regulate the discharge or charge process. During the
manufacturing process every MC3000 production unit gets tested and calibrated after highest
factory standards. Ambitious users who trust their own expensive equipment more or who prefer
their personal fluke to serve as reference have the possibility to adjust the MC3000 factory
calibration by a few counts. Note that production calibration procedure, undocumented in this user
manual, differs from the following documented calibration procedure in user calibration view
(UCV).
Steps for user calibration (Voltage):
# V O L T
1 C a l i b . V :
3 . 9 6
4 . 1 5
4 . 0 8
1. Have a set of 4 batteries with stable offline voltage, preferably all over 4.0V, at hand. With your
digital multimeter, measure their voltages accurately with a resolution of 3+ decimals in the
"1V"-range setting, e.g. "4.10285V, 3.97013V, etc".
2. Have the MC3000 connected to power and display TOV. Insert all 4 batteries. Depress SNB#1
and the STOP button simultaneously until the battery voltage in slot#1 is being displayed with 3
decimals, e.g. "4.098V", and release the 2 buttons in time. You are now in voltage calibration
mode for slot#1.
Enter your own measurement, in this example 5 counts up to "4.103V", with the help of the UP
3.
or DOWN button and save by depressing the ENTER button. Saving takes a few seconds.
4. Repeat the procedure similarly for the remaining 3 slots: depress SNB#2 and STOP
simultaneously until the battery voltage in slot#2 is being displayed with 3 decimals and
release, etc.
5. Recheck if the voltage readings of MC3000 and offline with your personal fluke do coincide for
other batteries with stable voltages.
Note: One does not need 4 different batteries for voltage calibration. As long as the battery has
stable voltage, the same battery can be reused in all 4 slots. Similarly, one does not need 4
different batteries for current calibration. As long as the battery is able to supply high constant
current over the duration of the calibration process, the same battery could be reused in all 4
slots.
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C U R R m A h
4 . 1 0 3 V
MC3000
Steps for user calibration (Current):
# V O L T
1 C a l i b . C :
2 3 . 9 0 - 1 . 0 0
3 4 . 1 1 - 1 . 0 0
4 4 . 0 6 - 1 . 0 0
1. Have a set of 4 fully charged high performance batteries at hand. With your digital multimeter,
get prepared to measure the battery current online in series accurately with a resolution of 3+
decimals in the "1A"-range setting.
2. Have the MC3000 connected to power and display TOV. Insert all 4 batteries. Run a constant
current discharge program at -1.00A in slot#1. Wait until the multimeter shows a stable
reading, e.g. "-1.00639A", then depress SNB#1 and the STOP button simultaneously until
the battery current in slot#1 is being displayed with 3 decimals, e.g."-1.000A", and release the
2 buttons in time. You are now in current calibration mode for slot#1.
3. Enter your own measurement, in this example 6 counts up to "-1.006A", with the help of the
UP or DOWN button and save by depressing the ENTER button. Saving takes a few
seconds. Observe how the multimeter reading automatically begins to drift from "-1.00639A"
to a perfect "-1.000.. A" booyah.
4. Repeat the procedure similarly for the remaining 3 slots: run the same -1.00A discharge
program in slot#2, wait until the multimeter shows a stable reading, then depress SNB#2 and
STOP simultaneously until the battery current in slot#2 is being displayed with 3 decimals and
release etc.
5.
Recheck if the current readings of MC3000 and online with your personal fluke do coincide for
other programmed discharge rates, e.g. -0.05A, -0.10A, -0.50A, -1.50A, -2.00A.
In theory you could also use a lower voltage battery for voltage calibration or a lower discharge
current for current calibration, however for guaranteed consistency across the 4 slots and the
entire voltage and current ranges we do not recommend lower values than the above suggested
ones. Since temperature of components and environment alters measurements by precision
electronics, please make sure that user calibration is done under isothermal conditions to make
any sense. In case of error or mistake, you can reset the calibration to ex factory conditions with
the Calibration Reset menu item in GSV. Good luck.
MC3000
USER CALIBRATION
C U R R m A h
- 1 . 0 0 6 A
2 7
1 6
9
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