Digital thermometer SNAFU

Discussion in 'Test Kits, Controllers, Reactors and Dosers' started by RocketRooster, 15 Jan 2013.

  1. RocketRooster

    RocketRooster

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    Hi gang,

    So yesterday I went and bought my first tank-related goodies. Included in the mix is a small external digital thermometer (Marlton's) with a wired probe.

    The thing has a digital on-off, and a F/C switch, as expected. However, it's also got two modes (toggled using the on/off button), labeled "IN" and "OUT" on the LCD display.

    I was fiddling with it last night trying to suss it. The "OUT" mode appears to be the probe. It gave my mouth temp as 36.1 degrees, which is pretty accurate.

    However, the "IN" mode (which is the default when you switch it on) does not have any rhyme or reason. It's always different from the "OUT" temperature, and seems to rise and fall along with the "OUT" temp, but completely unpredictably. At first I thought the unit has a second thermistor within the unit body (to measure air temp), but holding the unit in my fist for a while failed to deliver a corresponding rise in temperature.

    It's not really important, as I'm only really interested in the probe temp, but does anybody know what this "IN" temperate represents?

    Thanks!
    RIaan
     
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  3. Albert Terego

    Albert Terego

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    I think the unit has two temperature sensors - the "out" would be for the reading via the probe and "in" would be for the temperature read by the unit itself (sort of like the ambient temperature of the area in which the unit is situated - test this by changing the setting to "in" and putting it in the oven :p

    (or just leave it in the fridge for a while - will be safer)
     
  4. Nur

    Nur Starz

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    +1
     
  5. RocketRooster

    RocketRooster Thread Starter

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    Good idea, I'll give that a try.
     
  6. butcherman

    butcherman Moderator MASA Contributor

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    in = unit temp
    out = probe temp
     
  7. RocketRooster

    RocketRooster Thread Starter

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    I have a feeling the unit probe is geborken. It doesn't rise when I hold the unit in my hand.
     
  8. dallasg

    dallasg Moderator MASA Contributor

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    maybe your hands are broken? :p
     
  9. RocketRooster

    RocketRooster Thread Starter

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    Well now... I think you may be onto something there!

    I need to fix it ASAP!

    [​IMG]
     
  10. dallasg

    dallasg Moderator MASA Contributor

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    i can help...
     
  11. RocketRooster

    RocketRooster Thread Starter

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    You can sort me out with some cool shades. Not the pink starry ones though.

    Da DA DA de DA!
     
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