20 Most Recent Gardner Bender #GDT-200A 7 Func Digital Multitester Questions & Answers

leave unit for couple minutes to stabilise and check again. what are you compering temperature with?not sure if they can be adjusted

check online at GB's site, some manuals are available as a pdf

Take it to AutoZone and they will test the battery for free

For best use for your model multimeter I would recommend downloading a manual on the initial setup for testing and what you should look for.

so do I
I will call them and post the answer

this should help you,, I'm not sure if you mean to the meter itself or to what your testing, this link helps with temp readings Hope this helps, if not,, reply back to me and let me know, and I'll find your answer http://www.ladyada.net/learn/sensors/tmp36.html

Have you tried the GardnerBender.com website?

The 12P is just a plain old style meter. This is the GMT-312P and should be close enough https://www.gardnerbender.com/-/media/inriver/GMT-312_USE.pdf?modified=20200714162511 or you can contact direct at bottom of the page. https://www.gardnerbender.com/en/p/GMT-312/5-Function-Analog-Multimeter ..

AA means double A , AAA means triple A, 9 volt has a double lead with two wires on it. which do you have?

you need to connect your unit in DC Amps mode in series with charger when in use BUT be careful that anything over 10A will blow the fuse

http://www.gardnerbender.com/pdf/instructionmanuals/probestesters/gdt-3190.pdf

what about it?