k so i have installed an aem wideband af gauge in my car. for calibration the instructions arent the best as it just seem like they want you to install a data logger. well i dont plan on using the data logger. there are 2 wires that are used for data logging purposes. one of those two wires is output voltage. a data logger will read that voltage and be able to keep track of the af ratio. in the instructions there is a chart for what the output voltage is to what the af should be.
so basically in order to calibrate the gauge, you have to use a voltmeter on that wire, then look at the chart. according to what the chart says you will need to set the needle on the gauge accordinly. this isnt to big of a deal. but what happens if you want to make sure your still calibrated? you will need to pull that wire again and check it again.
so after some back and forth with trojan horse. we came up with this idea to install a volt meter on that output wire. this way anytime i needed to check calibration i will already have the voltage i need. the problem here is any standard auto volt gauge only goes down to 8 volts. the voltage i am trying to read is around 2-3 volts. so i found what is called a dc panel meter. i purchased it from ebay for around 4$ shipped.
to install this meter it only requires a positive, negative, and the signal wire which in my case would be the data logger wire. i have my wideband gauge installed in my custom radio delete. so i just used a small wafer cutoff wheel and mounted it right next to the gauge.
so that pretty much sums it up. if you want a wideband but dont feel like spending 300$ on a data logger or messing with wires and volt meters every time you want to check it. this is the best and easiest route.
note: with the panel meter being digital. it is also more accurate than the actual needle that is on the gauge. it is super tricky to tighten the lens on and keep the face plate in the proper spot. this is because there is a rubber gasket that touches the face plate. so when you tighten the bezel on it turns the faceplate that you just set the needle to. very tricky. but once you learn the volt range that you want you af to be in, you can just use that if you'd like.
I would normally just post my installs in the "what it takes thread". but there doesnt seem to be much information on the internet about calibrating a wideband gauge. so i figured this maybe searchable and help someone in the future. ENJOY