Escort Multimeters - Page 1
Forum section: electronics / beginners

author: gautamdamodar
author_rank: Contributor
timestamp: September 18, 2013, 12:39:21 pm
content: Is it worth to calibrate Escort 179 DMM or is better to buy some good brands. If I have a 6 1/2 digit DMM is it possible calibrate a 4 1/2 digit DMM. If so what will be the legal validity of calibration.PS: I am into process instrumentation. searched forum for answers but didnt find any appropriate one. Please advice.

author: Lightages
author_rank: Unknown
timestamp: September 18, 2013, 04:02:41 pm
content: The Escort 179 is a relatively unknown older model. It probably could be calibrated but that would also probably cost as much as a newer better meter with better safety standards. It would probably be better to get an Agilent U1272A for example which has a calibration data sheet included.If this is out of your price range and you don't need an actual calibration certificate but just want to be able to rely on a more modern meter with good accuracy out of the box, then you might also look at a Brymen BM867 or BM869 or even the BM257. They are built to a very high standard and I have yet to see one that did not meet its specs. The 869 might be of particular interest to you as a process instrument tech as it has the 4-20 current loop display in % as an optional display and it will read two temperatures at the same time. There is also the BM525 which has internal logging up to 87,000 points at and dual temp too.

author: Neilm
author_rank: Super Contributor
timestamp: September 18, 2013, 05:48:57 pm
content: Quote from: mojo-chan on September 18, 2013, 02:04:49 pmYou could argue that the 6 1/2 digit was a transfer standard, but the uncertainties would be horribleNeil

author: saturation
author_rank: Super Contributor
timestamp: September 18, 2013, 07:18:36 pm
content: To add what others have said, Escort was a good brand, its now Agilent's DMM division. They were well made but a lot depends on the cost of calibrating it in your country, is it India? is the DMM is good order? If it is, its worth getting calibrated if you need it to be as required by your work in India.To calibrate a device by IEC or ISO standards, it must be provided by an ISO certified provider of calibration, otherwise you get no ISO certificate. Is this certificate necessary? You can get away with DIY calibration if all you need is a device to be electronically correct, but if your country requires equipment be ISO calibrated to use in work then it will be a legal issue.In the US, nearly all workplaces require equipment to be safety rated and calibrated, rules created usually by OSHA and have the effect of law. Many time the rules are cover by multiple agencies, for example, if you work in a pharmacy, the FDA will also require equipment similar to OSHA rules, so a violation will have 2 agencies after the violator.Quote from: gautamdamodar on September 18, 2013, 12:39:21 pm

author: gautamdamodar
author_rank: Contributor
timestamp: September 19, 2013, 05:43:07 am
content: Thank you all.The DMM is not in a bad condition even though it look dirty! I have noticed drift only in voltage measurement and other ranges are fine. I think I can go for a DIY calibration. Please refer some good tutorials(I will watch Dave's also). I have some calibrated Fluke DMMs, so I can argue of transfer standard ??.

author: ace3838
author_rank: Newbie
timestamp: January 23, 2014, 03:00:26 pm
content: Your standard has to be 4 times more accurate than the unit under test, you have to follow a proper calibration procedure that is an industry accepted procedure and you need to be a business entity. Just sent it to someone who is ISO 17025 certified and be done with it.www.weedonengineering.com