Teledyne 6712FR manual To replace the internal battery

6712FR Refrigerated Sampler

Section 8 Maintenance

To replace the internal battery:

1.Open the controller case. Separate the case bottom and top by removing the two distributor connectors.

2.Lift the desiccant box from the case.

3.Remove the EMI shield and grounding straps by loosening the five 1/4-inch stop nuts.

4.Disconnect the module, liquid detector, and pump count connectors from the main circuit board.

5.Remove the three screws and the 1/4-inch stud attaching the main circuit board to the case.

6.Detach the main circuit board from the keypad connector by pulling gently upward on the edges of the board next to the connector. Pull the main board up until the keypad con- nector is almost even with the edge of the case. Next, detach the main circuit board from the connector board.

7.De-solder the lithium battery, using care to prevent dam- age to the circuit board. Insert the replacement battery and solder it in place.

Note

Poor soldering techniques can easily damage a printed circuit board. The battery should be replaced by a skilled technician.

WARNING

Danger of explosion if lithium battery is incorrectly replaced. Replace with the same type, ensuring correct polarity. Do not dispose of used lithium battery in fire.

8.Reconnect the main circuit board to the connector board before reconnecting it to the keypad. Replace the 1/4-inch stud and the three screws, and reconnect the module, liq- uid detector, and pump count connectors.

9.Replace the EMI shield and grounding straps. Reconnect the two distributor connectors.

10.Ensure that all connections and hardware are secure. Replace the desiccant and close the case.

11.Reset the battery alarm.

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