Voltage Calibration Using Sitetech - Kohler 6VSG Service Manual

3.7.2

Voltage Calibration using SiteTech

Connect a personal computer (laptop) to the controller
using a USB cable and follow this procedure to use
®
Kohler SiteTech™ software to calibrate the controller.
The voltage calibration factors are located in the
Genset Calibration group in SiteTech™.
parameter labeled Genset Calibration Factor Voltage,
L1-N. See Figure 3-20.
Note: A digital voltmeter is required for these
adjustments.
1. With the generator set off, connect a digital
multimeter to measure output voltage across +
and -. Set the meter to measure DC volts.
2. Start the generator set by pressing the RUN
button on the VSC controller.
3. Compare the voltage reading on the digital
voltmeter to the voltage displayed by the
controller.
4. If the voltage displayed on the controller does not
match the measured voltage, use the equation in
Figure 3-19 to calculate a new value for Genset
Calibration Factor Voltage, L1-N.
5. Type the new value for Genset Calibration Factor
Voltage, L1-N into SiteTech and click on Apply
Changes. See Figure 3-20.
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.
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.
44 Section 3 Controller
Figure 3-19
V meter = Voltmeter reading
V control = Voltage displayed on controller
Find the
F old = Genset Calibration Factor Voltage, L1--N,
from SiteTech before calibration
F new = New value to enter for Genset Calibration
Factor Voltage, L1--N, in SiteTech
Example:
Voltmeter reading: 53.4
Controller display: 54.0
Old calibration factor (from SiteTech): 1.0063
New calibration factor:
Figure 3-19 Voltage Calibration Factor
Repeat the
( V meter ÷ V control ) x F old = F new
(53.4 ÷ 54.0) x 1.0063 = 0.995118
TP-6844 1/13