Lm-1 to Tweecer hookup - Page 4

QWKSNKE · 04-01-2006, 05:18 AM

hooked up and running. put a post up and 'sticked it' with the how to for LM-1 and dataQ hook up. Tune should be about finished in a hour today

gt90stang · 04-01-2006, 07:13 PM

QWKSNKE,

Glad to hear you got it working

For my DataQ I had to calibrate it for absolute accuracy using the internal pot and an external calibrated source. Calibrating with the DataQ software only makes it accurate with the DataQ software and not with Calcon.

Zero out the DataQ calibrations and adjust the internal pot so the unit will read accurate minus full scale -10.000V, you can use an externally adjustable power supply set for -10.000V (you can connect + to common and - to channel 1 to make a positive source read negative) DO NOT DO THIS IN THE VEHICLE!

I use a precision adjustable voltage reference that I built to adjust A/D converters and calibrate precision electronic equipment. Also check the zero volt readings with a jumper across channel 1 and ground/common. Then you will get accurate readings with Calcon.

Good Luck, Don

04-01-2006, 05:18 AM	#31
QWKSNKE 3v's are slow Join Date: Dec 2004 Location: Here and There Posts: 17,152	Re: Lm-1 to Tweecer hookup hooked up and running. put a post up and 'sticked it' with the how to for LM-1 and dataQ hook up. Tune should be about finished in a hour today

04-01-2006, 07:13 PM	#32
gt90stang Member Join Date: Aug 2005 Posts: 72	Re: Lm-1 to Tweecer hookup QWKSNKE, Glad to hear you got it working For my DataQ I had to calibrate it for absolute accuracy using the internal pot and an external calibrated source. Calibrating with the DataQ software only makes it accurate with the DataQ software and not with Calcon. Zero out the DataQ calibrations and adjust the internal pot so the unit will read accurate minus full scale -10.000V, you can use an externally adjustable power supply set for -10.000V (you can connect + to common and - to channel 1 to make a positive source read negative) DO NOT DO THIS IN THE VEHICLE! I use a precision adjustable voltage reference that I built to adjust A/D converters and calibrate precision electronic equipment. Also check the zero volt readings with a jumper across channel 1 and ground/common. Then you will get accurate readings with Calcon. Good Luck, Don