Calibration Using Sitetech - Kohler Power Systems 8RESV Service Manual

3.7.2

Calibration Using SiteTech

Voltage calibration factors can be adjusted using
SiteTech software to calibrate the RDC2 or DC2
controller. Connect a personal computer (laptop) to the
controller using a USB cable and follow this procedure
to use Kohlerr SiteTecht software to calibrate the
controller.
The voltage calibration factors are located in the Genset
Calibration group in SiteTecht. Find the parameter
labelled Genset Calibration Factor Voltage, L1--L2. See
Figure 3-15.
Note: A digital voltmeter is required for these
adjustments.
1. With the generator set off, connect a digital
multimeter to measure output voltage across L1
and L2. Set the meter to measure AC volts.
2. Start the generator set by pressing the RUN button
on the RDC2 controller.
3. Compare the voltage reading on the digital
voltmeter to the voltage displayed by the controller.
Note: On the DC2 controller, the voltage is shown in the
scrolling status displays when the generator set
is running. Generator Voltage L1-L2 is also
displayed in SiteTech in the Generator Metering
group.
4. If the voltage displayed on the controller does not
match the measured voltage, use the equation in
Figure 3-14 to calculate a new value for Genset
Calibration Factor Voltage, L1--L2.
5. Type the new value for Genset Calibration Factor
Voltage, L1--L2 into SiteTech and click on Apply
Changes. See Figure 3-15.
6. Allow a few seconds for the controller to adjust to
the new factor and then compare the voltmeter
reading with the voltage displayed on the
controller.
7. If the voltage readings do not match, check your
calculations. Check the calibration factor and both
voltage readings again. Repeat the procedure
using the new values, if necessary.
Note: To simplify the calculation, set the calibration
factor to 1.0000 and then repeat the calibration
procedure from step 3.
8. Press OFF to stop the generator set.
52 Section 3 Controller
( V ÷ V
meter control
V = Voltmeter reading
meter
V = Voltage displayed on controller
control
F = Genset Calibration Factor Voltage, L1--L2,
old
from SiteTech before calibration
F = New value to enter for Genset Calibration
new
Factor Voltage, L1--L2, in SiteTech
Example:
Voltmeter reading: 241.2
Controller display: 240
Old calibration factor (from SiteTech): 1.0063
New calibration factor:
(241.2 ÷ 240) x 1.0063 = 1.0113
Figure 3-14 Voltage Calibration Factor
1
1. Voltage calibration factor
Figure 3-15 Voltage Calibration Factor in SiteTecht
) x F = F
old new
TP-6881 7/15