Comments for Young Calibration Blog http://www.youngcalibration.co.uk/blog Young Calibration Company Blog Mon, 23 Aug 2010 21:28:30 +0000 http://wordpress.org/?v=2.8 hourly 1 Comment on UKAS Air Velocity Calibration by Web Forms http://www.youngcalibration.co.uk/blog/?p=23&cpage=2#comment-1744 Web Forms Mon, 23 Aug 2010 21:28:30 +0000 http://www.youngcalibration.co.uk/blog/?p=23#comment-1744 I am just making a UKAS Calibration rig, and I would like to use some of your designs, with full reference of course. Could you help. Thanks in advance. - Andre I am just making a UKAS Calibration rig, and I would like to use some of your designs, with full reference of course. Could you help. Thanks in advance.

- Andre

]]> Comment on Anemometer Calibration by mojo http://www.youngcalibration.co.uk/blog/?p=74&cpage=1#comment-1738 mojo Sun, 22 Aug 2010 09:09:28 +0000 http://www.youngcalibration.co.uk/blog/?p=74#comment-1738 If staying over 3 m/s then we use pitot tube; decent pitot has good sensitivity to misalignment. Below 3 m/s we use small vane for site engineers, as easy to correctly align and thermal for best measurement practices, although thermal probe is held in a jig. If money is no object, then cannot do better than laser doppler anemometer, but these not very portable and take a great deal of expertise in getting setup correctly. I think these guys at Young's use a laser for calibration, but do not offer this externally away from the laboratory. If staying over 3 m/s then we use pitot tube; decent pitot has good sensitivity to misalignment. Below 3 m/s we use small vane for site engineers, as easy to correctly align and thermal for best measurement practices, although thermal probe is held in a jig.
If money is no object, then cannot do better than laser doppler anemometer, but these not very portable and take a great deal of expertise in getting setup correctly. I think these guys at Young’s use a laser for calibration, but do not offer this externally away from the laboratory.

]]> Comment on Ventilator Calibrator Issues by Juipleliere http://www.youngcalibration.co.uk/blog/?p=77&cpage=1#comment-1720 Juipleliere Thu, 19 Aug 2010 20:41:09 +0000 http://www.youngcalibration.co.uk/blog/?p=77#comment-1720 I am Erika from Los Angeles,CA and I enjoy visiting this site. Respical very popular here, but newer calibrators starting to appear from euro zone. Any info on IMT would helpful I am Erika from Los Angeles,CA and I enjoy visiting this site. Respical very popular here, but newer calibrators starting to appear from euro zone. Any info on IMT would helpful

]]> Comment on Ventilator Calibrator Issues by Jonesy8078 http://www.youngcalibration.co.uk/blog/?p=77&cpage=1#comment-1697 Jonesy8078 Tue, 17 Aug 2010 15:36:20 +0000 http://www.youngcalibration.co.uk/blog/?p=77#comment-1697 Interesting to hear about the IMT PF300, we have two and are giving good service todate. Will be going for their first calibration next month. Interesting to hear about the IMT PF300, we have two and are giving good service todate. Will be going for their first calibration next month.

]]> Comment on Anemometer Calibration by Brian Dyers http://www.youngcalibration.co.uk/blog/?p=74&cpage=1#comment-1634 Brian Dyers Tue, 10 Aug 2010 17:32:23 +0000 http://www.youngcalibration.co.uk/blog/?p=74#comment-1634 What is the best type of anemometer to use, for calibrating a large open duct. We are using a thermal anemometer at present, but it seems very sensitive to hand movement. Are vane anemometers better for calibration use? What is the best type of anemometer to use, for calibrating a large open duct. We are using a thermal anemometer at present, but it seems very sensitive to hand movement. Are vane anemometers better for calibration use?

]]> Comment on Anemometer Calibration by Baz Detherly http://www.youngcalibration.co.uk/blog/?p=74&cpage=1#comment-1503 Baz Detherly Tue, 27 Jul 2010 20:07:15 +0000 http://www.youngcalibration.co.uk/blog/?p=74#comment-1503 Andrew, why calibrate a velocity device with volume flowmeter and then convert back to velocity, this seems a long winded way to achieve your traceability. There are quite a few UKAS calibration laboratories offering air velocity calibration, (goto www.ukas.org/calibration and search for velocity). It would be easier to undertake a velocity profile of your tunnel with a UKAS calibrated pitot or thermal anemometer. I prefer to use a pitot, as these are less sensitive to installation misalignment than the thermal type probes. Contact me if you need further help. Regards Baz Andrew, why calibrate a velocity device with volume flowmeter and then convert back to velocity, this seems a long winded way to achieve your traceability. There are quite a few UKAS calibration laboratories offering air velocity calibration, (goto http://www.ukas.org/calibration and search for velocity). It would be easier to undertake a velocity profile of your tunnel with a UKAS calibrated pitot or thermal anemometer. I prefer to use a pitot, as these are less sensitive to installation misalignment than the thermal type probes. Contact me if you need further help. Regards Baz

]]> Comment on Ventilator Calibrator Issues by Musaf Raani http://www.youngcalibration.co.uk/blog/?p=77&cpage=1#comment-1495 Musaf Raani Mon, 26 Jul 2010 18:57:38 +0000 http://www.youngcalibration.co.uk/blog/?p=77#comment-1495 Gents, just to give some feedback on our IMT Medical PF-300 Ventilator Analyzer. Easy to setup, compact, lightweight, great range of functions and just returned from a calibration, with minimal drift, actually less than 1/4 of the manufacturers specification. Can highly reccomend this flow analyzer. Gents, just to give some feedback on our IMT Medical PF-300 Ventilator Analyzer. Easy to setup, compact, lightweight, great range of functions and just returned from a calibration, with minimal drift, actually less than 1/4 of the manufacturers specification. Can highly reccomend this flow analyzer.

]]> Comment on On Site UKAS Calibration by PeteMoxley http://www.youngcalibration.co.uk/blog/?p=102&cpage=1#comment-1488 PeteMoxley Sun, 25 Jul 2010 18:21:35 +0000 http://www.youngcalibration.co.uk/blog/?p=102#comment-1488 We cover temperature and dimensional for onsite UKAS work. Would be willing to discuss possible joint ventures. We cover temperature and dimensional for onsite UKAS work. Would be willing to discuss possible joint ventures.

]]> Comment on UKAS Air Velocity Calibration by Robert Gibson http://www.youngcalibration.co.uk/blog/?p=23&cpage=2#comment-1376 Robert Gibson Sun, 04 Jul 2010 11:50:15 +0000 http://www.youngcalibration.co.uk/blog/?p=23#comment-1376 Xledfid, becareful what you read on the internet, we had some old data from some MOD research tunnels which conducted blockage effects on small scale models, but when we tried to use this data, it was meaningless to our tunnel. It put us back about 3 months with our commissioning. To ensure you get it correct you will need to undertake the work on your own tunnel. Ensure you do a velocity and blockage ratio matrix, say 5 x 5 covering your criteria. It will also pay to get a defacto calibration in a large wind tunnel, which doesn't need a blockage correction applying. Unfortunately there isn't alot in the UK, so we ended up sending ours to Germany. Good luck and lots of patience. Xledfid, becareful what you read on the internet, we had some old data from some MOD research tunnels which conducted blockage effects on small scale models, but when we tried to use this data, it was meaningless to our tunnel. It put us back about 3 months with our commissioning. To ensure you get it correct you will need to undertake the work on your own tunnel. Ensure you do a velocity and blockage ratio matrix, say 5 x 5 covering your criteria. It will also pay to get a defacto calibration in a large wind tunnel, which doesn’t need a blockage correction applying. Unfortunately there isn’t alot in the UK, so we ended up sending ours to Germany. Good luck and lots of patience.

]]> Comment on UKAS Gas Flow Calibration by Robert Gibson http://www.youngcalibration.co.uk/blog/?p=30&cpage=1#comment-1375 Robert Gibson Sun, 04 Jul 2010 11:41:39 +0000 http://www.youngcalibration.co.uk/blog/?p=30#comment-1375 Hi, we calibrate similar meters to the Alicat, I presume these are thermal mass meters, and I would say it is down to the specific test rig being used for your calibration work. Our rig takes around 15 -18 minutes to stabilse between each point. The actual calibration time is the easy part; setting up, stabilising the instrument under test (at least 2 hrs) and leak checking are all critical parts for the calibration, and take just as long as doing the calibration run. We would only ever do a maximum of 4 calibrations in one day. This could be speeded up if the meters were all warmed up prior to coming into the calibration laboratory. Hi, we calibrate similar meters to the Alicat, I presume these are thermal mass meters, and I would say it is down to the specific test rig being used for your calibration work. Our rig takes around 15 -18 minutes to stabilse between each point. The actual calibration time is the easy part; setting up, stabilising the instrument under test (at least 2 hrs) and leak checking are all critical parts for the calibration, and take just as long as doing the calibration run. We would only ever do a maximum of 4 calibrations in one day. This could be speeded up if the meters were all warmed up prior to coming into the calibration laboratory.

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