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  1. #1
    Join Date
    Jun 2008
    Location
    Maryland
    Posts
    1,049

    Default 1027 operating range

    If you check the specs on the Sun Nuclear site for the 1027, you'll find they list the operating temperature range of 45F to 95F.

    I had a monitor in a hot vehicle and deployed it. The monitor itself was surely above 95F when I cleared and deployed it. The air temp in the room was within normal range.

    The test came out totally erratic and not usable in my opinion. I'm running a second test for the client at no charge.

    Have any of you had a 1027 act wild after deploying it while heated up? Could this have caused the erratic numbers?

    I put a different monitor in on the 2nd test for the client and am deploying this offending one in my own house for a test.

    Here are the wild numbers from the ill fated test.

    0.0 0.0 0.0
    0.0 8.0 24.0
    32.0 40.0 48.0
    208 264 288

    264 512 304
    40.0 88.0 104
    144 168 240
    192 408 744

    999 592 272
    0.0 256 216
    248 432 32.0
    8.0 0.0 0.0

    24.0 592 8.0
    0.0 8.0 8.0
    8.0 8.0 8.0
    8.0 T 8.0 0.0

    Overall Avg.=181
    EPA Protocol Avg.=196

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  2. #2
    Join Date
    Mar 2008
    Location
    Charlotte NC
    Posts
    2,303

    Default Re: 1027 operating range

    Quote Originally Posted by John Dirks Jr View Post
    If you check the specs on the Sun Nuclear site for the 1027, you'll find they list the operating temperature range of 45F to 95F.

    I had a monitor in a hot vehicle and deployed it. The monitor itself was surely above 95F when I cleared and deployed it. The air temp in the room was within normal range.

    The test came out totally erratic and not usable in my opinion. I'm running a second test for the client at no charge.

    Have any of you had a 1027 act wild after deploying it while heated up? Could this have caused the erratic numbers?

    I put a different monitor in on the 2nd test for the client and am deploying this offending one in my own house for a test.

    Here are the wild numbers from the ill fated test.

    0.0 0.0 0.0
    0.0 8.0 24.0
    32.0 40.0 48.0
    208 264 288

    264 512 304
    40.0 88.0 104
    144 168 240
    192 408 744

    999 592 272
    0.0 256 216
    248 432 32.0
    8.0 0.0 0.0

    24.0 592 8.0
    0.0 8.0 8.0
    8.0 8.0 8.0
    8.0 T 8.0 0.0

    Overall Avg.=181
    EPA Protocol Avg.=196

    I've taken them out of a hot car many times and never had anything like that.

    The beatings will continue until morale has improved. mgt.

  3. #3
    Join Date
    Mar 2007
    Location
    Colorado Springs, CO
    Posts
    1,217

    Default Re: 1027 operating range

    I have never had that happen. When was the last time your CRM was calibrated?

    "Baseball is like church. Many attend but few understand." Leo Durocher
    Bruce Breedlove
    www.avaloninspection.com

  4. #4
    Join Date
    Mar 2007
    Location
    Spring Hill (Nashville), TN
    Posts
    5,847

    Default Re: 1027 operating range

    Nope, never had that happen. I keep one in my truck for those unexpected times when the client changes their mind.

    Scott Patterson, ACI
    Spring Hill, TN
    www.traceinspections.com

  5. #5
    Join Date
    Jun 2008
    Location
    Maryland
    Posts
    1,049

    Default Re: 1027 operating range

    Quote Originally Posted by Bruce Breedlove View Post
    I have never had that happen. When was the last time your CRM was calibrated?
    Less than a year. This is the cert for the monitor in question.
    http://home.comcast.net/~arundelhome...report-014.PDF

    It's at home now and seems to be working fine.


  6. #6
    Join Date
    Mar 2007
    Location
    Colorado Springs, CO
    Posts
    1,217

    Default Re: 1027 operating range

    If I were you I would give Laura at Sun Nuclear a call.

    "Baseball is like church. Many attend but few understand." Leo Durocher
    Bruce Breedlove
    www.avaloninspection.com

  7. #7
    Join Date
    Jul 2008
    Location
    Snowbird (this means I'm retired and migrate between locations), FL/MI
    Posts
    4,086

    Default Re: 1027 operating range

    Did the home have a public or private water supply?

    Uncovered unvented sump in the basement or crawl? French Drain?
    Furnace/split AC coil air handler in the basement or crawl? Did it rain?

    In a low lying tidal waters area? Was thinking placement 1-2pm-ish spikes might have coincided with high Sinepuxent Bay tides, with the super spike early afternoon with home closed up all day perhaps running AC, as in the late night and wee hours (other times not closed conditions - perhaps many kids, attached garage lots of ins and outs school still in session during test days?)?

    You haven't mentioned unless I missed it the location of other factors such as ceiling fans (and perhaps thermostatically activated, even if the home were vacant), water softeners (going through purge cycles for example), furnaces, laundry facitilies, etc. Or made mention other than the extreme heat of the day you placed the device, in the vehicle before you placed it) as to wind conditions, direction, if vents all on lee side, etc. or if the home has any sort of passive or active mitigation system present, and its proximity to the test location.

    IIRC 999 is the max for the device, and IIRC the device averages two or three readings per hour for each reported test period, always drops the decimal when reporting a period at three digits, etc.

    Thoughts, curiosities throwing out there. Also remembering C.C. stating a ceiling padle fan could inflate by a 10 factor and compare testing periods with N.O.A.A. statistics/patterns.

    Curious. Is this the same one of four you acquired used that was misbehaving originally and had to be sent in for repair, not just calibration? Side by side challenge with another unit recently calibrated?

    Last edited by H.G. Watson, Sr.; 06-11-2011 at 10:08 PM.

  8. #8
    Join Date
    Jun 2008
    Location
    Maryland
    Posts
    1,049

    Default Re: 1027 operating range

    H.G.,

    There were no unusual factors to explain what this machine did. Even if there were multiples of them I cant figure out why it would cause the reading it did.

    Although I agree that all the things you mentioned can affect radon measurements, I believe this was some kind of fluke malfunction of the equipment.

    Furthermore, the one in question is not the one that previously needed repair. The one in question is and has been functioning normally here in my home ever since it was reset after the initial incident.

    The second test was concluded an hour ago. It was done with a different monitor. The data was typical in pattern and the final average was 5.4pCi/L.


  9. #9
    Join Date
    Mar 2007
    Location
    Succasunna NJ
    Posts
    574

    Default Re: 1027 operating range

    John;

    Like Scott, I 'used' to carry a monitor in my truck for that last minute call.

    My story is opposite temperature of yours. When I did try to use the monitor after being in my truck for several weeks in COLD weather, the red HV light (older model) stayed on. This indicated it needed service. I ran the test, called Sun Nuclear, picked up the monitor and deployed another then sent it out for repairs. This was about 2 years ago and no problem since; however, I don;t carry a spare monitor around anymore.

    Darren www.aboutthehouseinspections.com
    'Whizzing & pasting & pooting through the day (Ronnie helping Kenny helping burn his poots away!) (FZ)

  10. #10
    Join Date
    Mar 2007
    Location
    Knoxville, TN
    Posts
    2,446

    Default Re: 1027 operating range

    I carry my monitors around all the time. I carry them in an insulated bag (kind of like a small ice chest). I have never had a problem with a monitor doing anything like that.

    I did have a monitor act up a short time after it had been calibrated. I sent it back and they fixed it right away.


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