Embedded Systems Conference
Breaking News
Comments
Newest First | Oldest First | Threaded View
MeasurementBlues
User Rank
Author
Re:
MeasurementBlues   2/24/2014 4:55:26 PM
NO RATINGS
For most calibrations to ahve any value, they need to be traceable to a national lab such as NIST (US), NPL (UK), or NRC (Canada). National lbas provide uncertaintly and confidence levels for equipment they calibrate. The equipment calibrated at a national las isusually a transfer standard that is then used to calibrate. equipment in a working lab.

See Follow the Chain to NIST-Traceable Calibrations

prabhakar_deosthali
User Rank
Author
Re:
prabhakar_deosthali   10/15/2013 12:10:39 PM
NO RATINGS
As long the sensors are analog, and the component values get affected by the ambient conditions , there will be need for calibration. However the reference equipment itself is subject to periodic calibration for which some absolute reference standards are required in the test and measurement lab.

DrQuine
User Rank
Author
the importance of calibration
DrQuine   10/14/2013 10:32:23 PM
NO RATINGS
Many people believe that modern digital equipment makes the need for calibration obsolete. They are wrong. I recently found a "currently calibrated" digital (long stem) thermometers that was reading 24.0 °F high, a digital logging thermometer that required a 13.0 °F offset to read correctly, and a digital scale that was reading 25 pounds off (on a 75 pound scale). If your team starts questioning instrument calibrations, push back.  If the measurement is worth making, it is worth making it correctly.

MeasurementBlues
User Rank
Author
Re: like nasa
MeasurementBlues   10/14/2013 2:29:15 PM
NO RATINGS
@Caleb, It's really when you're dealing with analog equipment. You can also substitute "unpredictable" for unproven. See Go inside Fluke's electrical metrology lab, from my visit there in 2012.

Caleb Kraft
User Rank
Author
Re: like nasa
Caleb Kraft   10/14/2013 1:57:02 PM
NO RATINGS
I was referring to new equipment (less than 10 years) being "unproven" as per the first paragraph. With how quickly tech advances I hadn't really thought about some of the slower sides. 

MeasurementBlues
User Rank
Author
Re: like nasa
MeasurementBlues   10/14/2013 1:47:15 PM
NO RATINGS
@Caleb, There is another issue relating to NASA and the military regarding calibration. These organizations have their own promary standards and calibratin procedures. There is debate in the calibration community about NIST traceability and is it necessary in some circumstances. In other words, should one accept measurement that may not be NIST traceable?

MeasurementBlues
User Rank
Author
Re: like nasa
MeasurementBlues   10/14/2013 1:44:46 PM
NO RATINGS
"I hadn't really thought about this from a callibration standpoint." What do mean by "this"? Are you referrng to long-lived equipment when the parts are unavailable.?

Caleb Kraft
User Rank
Author
like nasa
Caleb Kraft   10/14/2013 11:31:28 AM
NO RATINGS
That's interesting. I hadn't really thought about this from a callibration standpoint. It reminds me of the way NASA handles hardware.



Radio
NEXT UPCOMING BROADCAST
Why Connect a Car?
May 11, 1pm EDT Monday
Overview: Battle-hardened veterans of the electronics industry have heard of the “connected car” so often that they assume it’s a done deal. But do we really know what it takes to get a car connected and what its future entails? Join EE Times editor Junko Yoshida as she moderates a panel of movers and shakers in the connected car business. Executives from Cisco, Siemens and NXP will share ideas, plans and hopes for connected cars and their future. After the first 30 minutes of the radio show, our listeners will have the opportunity to ask questions via live online chat.
Top Comments of the Week
Flash Poll
Like Us on Facebook

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)
Special Video Section
LED lighting is an important feature in today’s and future ...
Active balancing of series connected battery stacks exists ...
After a four-year absence, Infineon returns to Mobile World ...
A laptop’s 65-watt adapter can be made 6 times smaller and ...
An industry network should have device and data security at ...
The LTC2975 is a four-channel PMBus Power System Manager ...
In this video, a new high speed CMOS output comparator ...
The LT8640 is a 42V, 5A synchronous step-down regulator ...
The LTC2000 high-speed DAC has low noise and excellent ...
How do you protect the load and ensure output continues to ...
General-purpose DACs have applications in instrumentation, ...
Linear Technology demonstrates its latest measurement ...
10:29
Demos from Maxim Integrated at Electronica 2014 show ...
Bosch CEO Stefan Finkbeiner shows off latest combo and ...
STMicroelectronics demoed this simple gesture control ...
Keysight shows you what signals lurk in real-time at 510MHz ...
TE Connectivity's clear-plastic, full-size model car shows ...
Why culture makes Linear Tech a winner.
Recently formed Architects of Modern Power consortium ...
Specially modified Corvette C7 Stingray responds to ex Indy ...