Smart LT Manual
Dynatronix, Inc.
198-0853-02 Rev F
Page 59 of 126
Voltage Calibration Load:
The current developed across the load should be 50 amps at
12 volts. To determine the resistor value use Ohms law:
12 Volts / 50 Amps = 0.24 ohms
To determine the wattage use:
12 volts x 50 amps = 600 watts
To calibrate the voltage settings it will be necessary to connect a load resistor with a value
of 0.24 ohms and 1200 watts (twice calculated wattage).
10.1.2. Calibration Summary
1. Connect the calibration load, shunt and meters to the output of the power supply as shown
above.
2. Select t
he “CAL” sub menu from the “Unit Configuration Menu” (see
6.3.Unit Configuration
)
to enter the “Calibrate Configuration Menu”.
3. There are two separate calibrations a
vailable in the “Calibrate Configuration Menu” (see
A.6.5.Calibrate Configuration Menu
for more information regarding the calibration menus).
Select “LCL” (local) to calibrate the front panel read back meters and the power supply
output. Select “OPt” to calibrate the option card (if an option card is installed).
4.
Each calibration menu contains a “dFLt” option to load calibration defaults. Loading default
calibration values will remove any previously stored calibration values and reset all the
associated calibration values to default values. The default calibration values are not
customized to each unit and will not likely provide operation within the product specification.
Each power supply must be properly calibrated to operate within the product specifications.
Units are not shipped with default calibration values, each unit is individually calibrated at
the factory.
5. Each calibration menu contains a series of calibration points. Calibration points should be
performed in numerical order as described in the calibration procedure. The calibration
values for any calibration point can be viewed at any time without changing the values
(select “no” when prompted to store changes).
4.5 DIGIT DVM
(VOLTAGE)
4.5 DIGIT DVM
(CURRENT)
POSITIVE
OUTPUT
NEGATIVE
OUTPUT
POWER SUPPLY
SHUNT
LOAD