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Battery Replacement Instructions (
For DC powered instruments only)
The rechargeable NiCad batteries used in the 4021 are very durable and should provide years of
trouble-free operation. As with all batteries, replacement will eventually be necessary. Batteries
may be ordered from Valhalla Scientific as stock #05-10117, quantity: (4).
The process of battery replacement is described below:
1.
Remove the four feet screws and the bottom cover.
2.
Undo the reusable tie-wraps by pushing down on the locking pin.
3.
Remove the old batteries and replace. Observe polarity!
4.
Secure the new batteries in place by re-tightening the tie-wraps.
5.
Replace the cover and feet screws, taking care not to pinch any wires.
