ESI IMPEDANCE BRIDGE 250DE

1/16/2003 10:05:45 PMDELMAR PARKS

I NEED AN INSTRUCTION MANUAL AND SCHEMATIC FOR AN ELECTRO SCIENTIFIC INDUSTRIES IMPEDANCE BRIDGE MODEL 250DE. I WAS ABLE TO CHECK RESISTANCE USING THE INTERNAL 1KHZ SETTING BUT NOT WITH THE INTERNAL DC. THANKS FOR ANY HELP.

1/18/2003 10:44:29 AMAnonymous

:I NEED AN INSTRUCTION MANUAL AND SCHEMATIC FOR AN ELECTRO SCIENTIFIC INDUSTRIES IMPEDANCE BRIDGE MODEL 250DE. I WAS ABLE TO CHECK RESISTANCE USING THE INTERNAL 1KHZ SETTING BUT NOT WITH THE INTERNAL DC. THANKS FOR ANY HELP.

You might try finding a manual for the military ZM30 / URM90 which I believe is similar (it was made by ESI at any rate).

Does it use a galvanometer for DC balance? I can't recall. If it works on AC but not DC, that might be a place to look.

1/18/2003 10:44:52 AMAlan Douglas

:I NEED AN INSTRUCTION MANUAL AND SCHEMATIC FOR AN ELECTRO SCIENTIFIC INDUSTRIES IMPEDANCE BRIDGE MODEL 250DE. I WAS ABLE TO CHECK RESISTANCE USING THE INTERNAL 1KHZ SETTING BUT NOT WITH THE INTERNAL DC. THANKS FOR ANY HELP.

You might try finding a manual for the military ZM30 / URM90 which I believe is similar (it was made by ESI at any rate).

Does it use a galvanometer for DC balance? I can't recall. If it works on AC but not DC, that might be a place to look.

1/18/2003 7:43:03 PMDelmar Parks

::I NEED AN INSTRUCTION MANUAL AND SCHEMATIC FOR AN ELECTRO SCIENTIFIC INDUSTRIES IMPEDANCE BRIDGE MODEL 250DE. I WAS ABLE TO CHECK RESISTANCE USING THE INTERNAL 1KHZ SETTING BUT NOT WITH THE INTERNAL DC. THANKS FOR ANY HELP.
:
:You might try finding a manual for the military ZM30 / URM90 which I believe is similar (it was made by ESI at any rate).
:
:Does it use a galvanometer for DC balance? I can't recall. If it works on AC but not DC, that might be a place to look.

It does use a galvanometer and also uses an internal 1khz/ac gen or internal DC/gen. I have found instruction for the basic functions and it also has a diagram of what the unit looks like if you would like to see. It is (http://tpub.com/neets/book16/69e.htm). This unit also has a factory NiCad battery/recharge circuit modification installed in the battery compartment.

Thanks Alan for the info and your reply.