How to read the Riseman's barometer

Thread: How to read the Riseman's barometer

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  1. #1
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    How to read the Riseman's barometer

    the manual says if the arrow points up, high pressure no rain
    points south, low pressure likely to rain. This afternoon we had a thunderstorm and arrow pointed north. Can it be that I just left my aircon office that the sensor could not detect the pressure? Pl help what does this mean on the watch 10 05hpa with horizontal arrow??

  2. #2
    Member Topher1556's Avatar
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    Re: How to read the Riseman's barometer

    Yes, being in an AC building with a pressurized climate control system (forced air A/C) will disrupt the Riseman baro sensor.

    10 05hpa means 1005hpa or29.68 inHG (or 14.58psi).
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  3. #3
    Member Bogeyman's Avatar
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    Re: How to read the Riseman's barometer

    Quote Originally Posted by TheEden View Post
    the manual says if the arrow points up, high pressure no rain
    points south, low pressure likely to rain. This afternoon we had a thunderstorm and arrow pointed north. Can it be that I just left my aircon office that the sensor could not detect the pressure? Pl help what does this mean on the watch 10 05hpa with horizontal arrow??
    Happens to me too; the sensor isn't exactly fast enough to measure pressure difference with abrupt movements between two locations i.e. from inside an airconditioned office to outdoors (although it can easily tell the difference when I drive from the hills down to the lowlands and vice versa). The barometer feature is likely to work best in extended outdoor scenarios, such as camping trips, trail hikes, marathons or if you happen to be working as a field surveyor.

    If your watch is reading 1005hPa with a horizontal arrow, it means that the pressure is more or less constant at 1005hPa. Fairly high, which means less chances of rain (if you're outdoors).
    Last edited by Bogeyman; April 28th, 2009 at 19:11.
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  5. #4
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    Re: How to read the Riseman's barometer

    you guys made more sense than the manual.
    thanks

  6. #5
    Member dctokyo's Avatar
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    Re: How to read the Riseman's barometer

    a barometer should be use outside and not inside, unless it rains inside your house
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  7. #6
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    Re: How to read the Riseman's barometer

    When using my Riseman on the mountain bike (have been using the Core of late) the best way for me to read it with any accuracy is this.

    If the pressure is high and I get a 1mb decrease (arrow at 45 degree) its nothing.
    The same applies to 2mb too.

    These readings are referenced to the last measured and logged prerssure as shown on the graph. Its a differential pointer remember.

    Now, when the graph shows a very steep record of at least 3 dots horizontally, so 6 hours of recording, with at least 3mb between each 2 hour record, I usually get rain or the threat of it.

    Hope this helps.

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