Heathkit model CI-1020

Automotive Timing Light

 

Date Calibrated:   _____/_____/_____

 

Calibration Procedure

 

♦  Avoid contact with the two leads of the strobe tube when connected to the battery due to potential high voltage.

 

(    )         With the top cover off, temporarily secure the high voltage cable and the two battery cables with either a rubber band or masking tape. (This will help prevent damage to the wire lead connections on the circuit board.)

 

(    )         Adjust the 200 ohm control maximum clockwise.

 

* * * * * * *

ADJUSTMENT USING THE NEON LAMP

Refer to Figure 1

 

(    )         Connect the red (+) battery cable clip to the positive (+) terminal of an automotive battery or to the positive terminal of an independent 15 VDC power supply.

 

(    )         Connect the black (-) battery cable clip to the negative (-) terminal of an automotive battery or to the negative or ground terminal of an independent 15 VDC power supply.

 

(    )         Press and hold the pushbutton switch (a faint squealing noise is normal).

 

(    )         Adjust the 200 ohm control until the neon lamp just begins to glow.

 

(    )         Release the pushbutton.

 

(    )         Disconnect the two battery clips.

 

(    )         Carefully remove the rubber band and/or masking tape securing the high voltage cable and the battery cables to the handle.

 

(    )         Re-attach the case cover.

 

(    )         Calibration procedure is complete.

 

* * * * * * *

ADJUSTMENT USING A DC VOLTMETER

Refer to Pictorial 3 and Figure 2

 

(    )         Set the voltmeter scale to one capable of reading 600 VDC.

 

(    )         Connect the positive voltmeter lead to the “L” neon lamp lead (near the top edge of the circuit board).

 

(    )         Connect the negative voltmeter lead to the “K” neon lamp lead (near the bottom edge of the case).

 

(    )         Connect the red (+) battery cable clip to the positive terminal of an automotive battery or to the positive terminal of an independent 15 VDC power supply.

 

(    )         Connect the black (-) battery cable clip to the negative terminal of an automotive battery or to the negative or ground terminal of an independent 15 VDC power supply.

 

(    )         Press and hold the pushbutton switch (a faint squealing noise is normal).

 

(    )         Adjust the 200 ohm control until the voltmeter reads 600 VDC.

 

(    )         Release the pushbutton.

 

♦  Disconnect the battery leads from the battery or power supply first to avoid potentially high voltages on the voltmeter leads.

 

(    )         Disconnect the two battery clips.

 

(    )         Disconnect the two voltmeter leads.

 

(    )         Carefully remove the rubber band and/or masking tape securing the high voltage cable and the battery cables to the handle.

 

(    )         Re-attach the cover.

 

(    )         Calibration procedure is complete.