Kohler — Voltage Calibration Using SiteTech
Adjustments · Source 1 and Source 2 calibration factors
From a Kohler service manual — check it applies to your exact model before use.
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Procedure
- Measure the voltage across transfer switch lugs NL1 and NL2.
- Check the voltage displayed for Source 1 Voltage L1-L2 in the Source 1 Metering group; compare to the voltmeter.
- If they differ, calculate the new calibration factor: (Vmeter / Vcontrol) x Fold = Fnew.
- In the Source 1 Calibration group, type the new value for Source 1 Calibration Factor Voltage L1-L2 and click Apply Changes.
- Allow a few seconds and compare the voltmeter reading with the controller display.
- For three-phase models, repeat for L2-L3 and L3-L1.
- Start the generator set and repeat for Source 2 using Source 2 Metering and Calibration groups.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Example new calibration factor: (241.2 / 240) x 1.00 = 1.005
Source: Kohler service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.