Kohler 20-3250 kW Menu 12-Calibration, Menu 12 Displays with Key Entries Scale AC Analog Inputs

2.8.12 Menu 12—Calibration

Menu 12 provides the calibration of the voltage and current sensing logic. Changing the system voltage or replacing the main logic control circuit board requires a calibration adjustment.

The user must enable the programming mode to edit the display.

Connect a meter with a minimum accuracy of 1% to the generator set output leads to calibrate the voltage-sensing logic. Configure the generator set controller for the system operating configuration using Menu 7—Generator System. Adjust the generator set voltage using Menu 11—Voltage Regulator, when required and adjust the frequency at the generator set governor before making calibration adjustments.

Reduce the voltage regulator gain using Menu 11, Voltage Regulator until the voltage is stable prior to calibration.

The user must scale the analog input value in order to calculate the low/high warning and shutdown analog values based on a 0--5 VDC scale.

ECM engines have user-defined analog inputs A01--A07. Non-ECM engines have user-defined analog

inputs A03--A07 where analog inputs A01 and A02 are reserved for the engine coolant temperature A01 and oil pressure A02 displays.

Analog Input A06—Analog Speed Adjust (VSG). Analog Input A06 may be used for analog speed adjust when external control of engine speed is desired such as paralleling applications or closed transition ATS. To utilize this capability, the input must be calibrated.

Note: For VSG on Analog Aux. Input 06 calibrate: Volvo: 0.5V=1250; 4.5V=8750 GM/Doosan at 60 Hz: 0.5V=2375; 4.5V=2625 GM/Doosan at 50 Hz: 4.5V=2327; 4.5V=2624

Analog input A07 is the voltage adjustment for paralleling applications only. This input adjusts the input up or down from the value entered in Menu 11, Voltage Regulator. Calibration is not necessary.

Note: Press the Menu Right → key prior to entering decimal values where necessary.

Changes to the generator set system parameters causes a CHECK CALIBRATION display message. If the generator set system parameters are changed, verify the controller display calibration by comparing the results to a known measured value.

Menu 12—Calibration

Menu 12 Displays with Key Entries (Scale AC Analog Inputs)

Key
Entry	Display	Description

ENTER MENU NO. 1--15

MAIN MENU NUMBER 12

MENU 12

CALIBRATION

SCALE AC ANALOG

INPUTS

GEN VOLTAGE LN

GEN L1-L0 V	#
CALIB REF	?.?

AND

GEN L1-L0 V	#
CALIB REF	?.?
GEN L1-L0 V	#
CALIB REF	#.#

Input a menu number.

Press the Enter key.

Displays the menu number and name.

Displays the scale AC analog inputs heading.

Displays the generator set voltage line-to-neutral heading.

Note: The generator set must be running for the following steps.

Measure the generator set output voltage for single and three-phase models between L1-L0 using a voltmeter and enter the result using the numeric keys. Press the Menu Right → key prior to entering the decimal value.

Use the numeric keys to enter the decimal value. Press the Enter key.

Confirms the entry.

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