wantedwolf

HI, I have installed the model 5744 pyrometer gauge made by Autometer specificly it is a phantom version.

I am curious to know if your gauges settle at zero when the power/ign is off.

All the photos I see of this gauge read zero, but when I asked an autometer service rep, he said that it will never read zero, unless the temp at probe is 0 or lower.

the outdoor temp here is 6*C (48*F) and with a cold not running engine the gauge reads 150*F. I really suspect that this is not calibrated properly and all my reading are high by apx. 100*F.

Any thoughts or experiences to set me or autometer straight would be much appreciated.

DTR to the rescue again.

wantedwolf

For those interested this is what the rep sent me. still not sure thou.

----my question----
I recently purchased 4 autometer phantom gauges, one a pyrometer (5744). I am concerned as to its accuracy as it never settles at zero.
when off or when truck is just started, it reads apx 1.5 . Is there a way to zero/calabrate this. Or is it a potentialy faulty gauge?


----1st reply from autometer rep----

Hello.

The gauge is not meant to fall to zero, and will also not read zero when on, unless it is at or below zero degrees temperature at the probe.

Thank you.
Cory
Tech/Service


-----2nd reply----

Hello.

The photos are "photo-sample" gauges. As for the tolerance of the pyrometer, ask all the folks you want. Here is how it operates:

A pyrometer is a gauge that operates off of a type K thermocouple, and does not have a "spring-loaded" pointer to pull it down to zero. It uses an air-core meter.

A pyrometer is also not intended to be an outside air temperature gauge, and during calibration of the gauge during manufacturing, the gauge is calibrated to be within tight tolerance at the higher end of the scale where it matters most. In other words "who cares if it is off by 75 degrees" at ambient. The gauge needs to be dead on, at higher temps above 600 degrees, where it matters.

As a test to the calibration of the gauge, you may remove both probe wires off of the back of the gauge, and then turn power on. By Type-K specs, and in a perfect world, that would = 32 degrees F. In reality, due to where we calibrate, that can land anywhere between 0 and 100 degrees and be considered within tolerance (remember, it will gain accuracy, as temperature increases).

Thank you.
Cory
Tech/Service

Auto Meter Products
413 W Elm St.
Sycamore IL 60178
1-866-248-6357

Tate

I have the cobalt version. When you turn the key off, it stays at the last reading, which is usually around 300 degrees. He's right about the tolerance on the low end, since the pyro is for reading higher temps. Even in -40, my gauge will still read 75 degrees when the key is on and the engine is off.

wantedwolf

Im coming around