BH 202 tip

[Slingshot]

One thing I have discovered about doing away with some of the chatter and seemingly increasing depth of detection on the 202 is to make sure you reverse one of the batteries in the battery compartment. One battery should be with it's top towards the outside and the other with its top turned to be towards the inside of the machine. Give it a try. Cheers!

 

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[Rustynailsandscrews]

One thing I have discovered about doing away with some of the chatter and seemingly increasing depth of detection on the 202 is to make sure you reverse one of the batteries in the battery compartment. One battery should be with it's top towards the outside and the other with its top turned to be towards the inside of the machine. Give it a try. Cheers!

That's curious if true. I have a 505 which is just a upgraded 202. I can't understand why it would make an improvement but I'll try anything so thanks for the tip.

 

[woof!]

There is only one correct way, the way it's labeled. Any other way will not work properly if at all, and might damage the machine. Don't get creative with batteries!

 

[Keppy]

Woof is right on here better listen to him..

 

[Phantasman]

Agreed. DC circuitry is designed to utilize voltage effectively by design, especially when dropped to travel through Integrated Circuits (IC Chips). I'm sure there is some diode protection from accidental polarity reversal (wrong way battery insertion). If I had to guess, the reason you don't get chatter it because you are not using the effective voltage, therefore a substandard amount is causing a less sensitive detector. There is a POT that does the same thing effectively.

I used to have people trying to change my engineered designs with monkey rigging. And in the Fire Alarm business, it was a matter of life safety. Used to p#@& me off.

 

[daemon1971]

My 202 takes two 9 volt batteries, the connectors are on wires, with enough slack to turn one upside down in the compartment after they are connected properly to the batteries...... I think that is what the OP might have been referring to. Not hooking up the batteries to the wrong poles or anything like that.

 

[Rustynailsandscrews]

My 202 takes two 9 volt batteries, the connectors are on wires, with enough slack to turn one upside down in the compartment after they are connected properly to the batteries...... I think that is what the OP might have been referring to. Not hooking up the batteries to the wrong poles or anything like that.

I think you are correct in what he meant. Simply attaching the batteries with one connection side facing up and the other down.

 

[Slingshot]

Yeah, one battery should be upside down. Digital circuitry - jeesh - analog was so simple.

 

[Phantasman]

Weird. I'm trying to think how the batteries are turned effects the unit. It sounds like saying "if I turn my car battery 180 in it's shelf, my car runs smoother"

Oh well.

 

[Slingshot]

Yeah, weird is right. I got that straight from the operators manual that comes with the 202 that nobody reads or comprehends what they are reading, but it does work.