Hi guys/gals,
I've got a 0 - 15PSIA 4 wire full bridge transducer (annoyingly, it's old and discontinued so no datasheet).
When exciting with 5v and 0v at ambient pressure it has an output voltage of 1700mV and the deepest vacuum I can draw at the moment 1692mV read on a cheap Uni-T multimeter.
Do any of you with precision measurement experience know what the most precise way of balancing this is? Should I put a high precision pot in parallel across two of the transducer wires to balance it? This might cause a loss of any linearity on the sensor so I'm not sure this is the best idea.
Current circuit is:
Transducer:
Red - +vs 5v
Black - Gnd
Green - +
White - -
REF of AD623 is connected to a 10k POT between Gnd and +vs, this was my attempt at adjusting the offset of the reading.
Thanks for any help you can give in advance!
I've got a 0 - 15PSIA 4 wire full bridge transducer (annoyingly, it's old and discontinued so no datasheet).
When exciting with 5v and 0v at ambient pressure it has an output voltage of 1700mV and the deepest vacuum I can draw at the moment 1692mV read on a cheap Uni-T multimeter.
Do any of you with precision measurement experience know what the most precise way of balancing this is? Should I put a high precision pot in parallel across two of the transducer wires to balance it? This might cause a loss of any linearity on the sensor so I'm not sure this is the best idea.
Current circuit is:
Transducer:
Red - +vs 5v
Black - Gnd
Green - +
White - -
REF of AD623 is connected to a 10k POT between Gnd and +vs, this was my attempt at adjusting the offset of the reading.
Thanks for any help you can give in advance!