EFY Times  
Wednesday, July 23, 2014

 
GO
 
 
Importance Of Calibration For T&M Instruments
 
Home >> Electronics >> Features
 
Importance Of Calibration For T&M Instruments  
 
The impact of even a small error in measurement can be tremendous in terms of loss in revenue. Hence, even the smallest of errors in delivery (data accuracy) is unacceptable due to the vast sums of money involved, first, when manufacturers buy instruments, and later when prototypes go into production. Thus, it has become vital to have the equipment calibrated on time.    
Rate this news:  (0 Votes)
Saturday, May 19, 2012 Calibration is the process of configuring an instrument to provide a result for a sample within an acceptable range. To ensure that electronics test equipment performs as per specifications, it is necessary that it receives its periodic calibration. Over a period of time, every device experiences physical stress or variations that cause a decline in its performance levels. Hence, calibration is the key to accurate data. Calibration can be of two types—the first is soft calibration, which is done on the basis of internal signals and software algorithm routines. While hard calibration is done once in a year or two, using industry standard signal generators.

While calibrating, the procedure may vary from product to product. However, this process generally involves using the instrument to test samples of one or more known values called calibrators.

With technological advancements, several instruments like oscilloscopes today provide state of the art design and debug solutions and come with an inbuilt calibrator. Thus, oscilloscopes offer extensive triggers to identify elusive anomalies. However, once they are connected to active probes, calibration is required so as to detect and capture the signal accurately. Agilent offers the widest range of application and customer support locally. Local customer support centre holds an ISO 9002 certification and is an NABL accredited calibration centre. “We offer a very unique web based customer interface to all our serviced install base and a unique offering of onsite calibration called VOSCAL (volume onsite calibration). We also provide calibration and adjustment software for those customers who have the hardware capabilities in-house. These are the same OEM calibration software used in Agilent service centres,” informs Sadaf Arif Siddiqui, technical marketing specialist, Agilent Technologies Pvt Ltd.

calibration, electronics, measurement, electronics instrument




How frequently should calibration be done?

It is difficult to specify the time intervals between calibration. A daily testing control solution of known values can provide a quantitative indication of the instrument’s performance, which can be recorded. If the control data indicates that the instrument’s performance is stable, or is varying randomly but well within the acceptable range of values, then there is no need to recalibrate the instrument. However, if the historical data indicates a trend beyond the limit of the acceptable range, then recalibration is warranted. Informs Nasser Salim Jariwala, head, business development and regional manager, west India, Rhode & Schwarz, “There is no special maintenance required other than the usual procedure followed for test and measurement (T&M) products. We at Rohde & Schwarz recommend calibration of a unit after one year of its operation. Also, all prominent manufacturers have their own calibration facilities in their labs.”

What players offer

Normally, specific adjusters are required to enable the instrument to be calibrated. Additionally, the required test setup and suitable test equipment to perform the calibration procedure is required. Shares Kumaraswamy ML, deputy general manager, TMI and Communications products division, Yokogawa India Ltd, “Scopes usually require periodic maintenance for healthy operations related to its published specifications. Hence, not only do companies offer calibration services for their devices but they also have dedicated service and repair centres to take care of periodic maintenance and repair.”

Says Praveen Kumar Gupta, director, Avante Global Services Pvt Ltd, “An oscilloscope calibrator is an independent device that offers very high accuracy and can be calibrated. These are being offered by a select few calibration equipment manufacturers only. Most manufacturers recognise the need to maintain properly calibrated devices for high accuracy measurements. To help meet calibration needs, manufacturers provide calibration support and services that include manual calibration procedures, services to calibrate products and automated calibration software.”

Adds Nandini Subramanya, marketing communications manager, National Instruments (NI) India, “Every PXI-5922 is factory calibrated to verify that it meets NIST-traceable standards. It has an onboard calibration circuit that corrects it for environmental effects on linearity, gain, offset and input bias current. Also, users can perform self calibration to ensure that the board is within specifications.” With ISO 17025 accredited calibration, NI offers traceable and complaint calibration services to its clients. With traceable calibration, users can track how instruments are performing as well as minimise the time and costs associated with unscheduled downtime and quality issues.

The RTO 1044 series of oscilloscopes offered by Rhode and Schwarz have self-test and self-alignment features. Self-alignment involves performing horizontal and vertical alignment, ideally, 0.5 hours after the power is on. If self-alignment fails, the ‘UNCAL’ flag appears on the screen indicating that calibration has not been processed. Adds Nasser Salim Jariwala, “Both self-testing and self-alignment can be initiated by the customer at any time during the operation of the unit. We are equipped to repair and calibrate these scopes in the event of failure. We have trained service experts and have a NABL-certified lab in Bengaluru.”

While manufacturers do offer calibration facilities, it is the users who have to ensure that the equipment is operating as per specifications. This is achieved by rigorously maintaining a process whereby all the equipment in use is calibrated. This will ensure that all the measurements are accurately made and with sufficient records, any test equipment problem can be traced and rectified.

-- Richa Chakravarty




Print Email Post Comment  (1)
(Total Views: 3078)
 
Share

 
 

1 Comments

Sagar   766 days ago

This is a most useful contribution to the debate
Reply  
 
Electronics News
   
LG Electronics Triples Sales Target To Rs 25,000 Million For Mobile Division In 2014
Centre To Improve BSNL’s Functionality
Spansion Files Multiple Petitions With The U.S. Patent Office Challenging Validity Of Macronix's Patent Claims
Millions Of Android Gaming Consoles On The Horizon: Jon Peddie Research
Research And Markets: Global Interactive Whiteboard Market (IWB) 2014-2018
 
 
 
     
     
     
     
     
     
Most popular
 
Features
5 Bootable Data Recovery Tools For Your Linux Systems
Make sure you have these tools always close at hand....
10 Good TCP/IP Troubleshooting Tools For You
The following tools are essential resources if you're working with TCP/IP. ...
7 Good Linux Recovering Tools For Linux/Windows/Mac machines
Make use of these tools for all your data recovery needs......
Have Fun With Linux Command Line, Play These 5 Games Now!
The Linux Command Line can be so much fun!...
Top 10 'Most' Downloaded WordPress Plugins As Of Current Stats
Are you using these plugins right now? If not, try them, they are awesome!...
8 Wireframing Tools For Web Designers
Make some cool websites with these good resources. Add your own for others to know......
8 Good PHP Debugging Tools For Developers
Let's catch some bugs, shall we?...
Top 6 Log File Analysers For Data Analytics
The following Log File Analysers are quite useful, also they are completely free to use!...
8 Good PHP Image Manipulation Libraries For Developers
If you're a PHP developer, chances are you're quite the happy lot. Make sure you share the fun, leave behind your personal favorites in the comments s...
Smartphone Review: HTC One (M8)
We review the 'beast' and find out if it's really worth being the flagship of the year, in our comprehensive review......
8 Free SQL Injection Scanners & Tools For All Your Security Needs
SQL injection is a serious threat, make sure you're up to date with all the tools that make it so potent......
7 Free Books On Computer Graphics-GUI Programming
These free books are excellent for newbies. However, more advanced users have also been kept in mind while making the list....
5 Password Generators/Managers To Maximise Your Online Security
You can generate strong and secure passwords using these online tools......
Here Are 10 'Free' eBooks On C# You Can Read Right Now!
Read all these books to get a thorough insight into the world of C#. ...
Here Are 5 Must-Try Programming Toolkits
Programmers are advised to leave behind their suggestions and/or their own preferred choice of toolkits......
 
  View All
Dialogue
 
10 Questions That Google Never Asks While Hiring!
Here is a list of 10 questions that Google just banned from their interviews....
For Enjay, Open Source Technology Is A Way Of Life
An entirely open source-based company, Enjay IT Solutions, has built itself a reputation in the OSS domain....
Switching To Tizen Doesn’t Mean We Are Abandoning Android: Samsung
The company has worked to build Tizen up from scratch and has now introduced it to developers and the general public with its latest range of wearable...
Venturing Into The Cloud? Develop A Customised Cloud Strategy First!
Diksha P Gupta speaks to Rushikesh Jadhav, cloud evangelist, ESDS Software Solution Pvt Ltd, on how the cloud has changed the way compan...
HTC Is Strong And There Are No Plans Of Sale Now Or In Future, Says HTC's Senior Director-Marketing
Atithya Amaresh from EFYTimes had an exclusive chat with Sirpa H. Ikola, senior director, Marketing, South Asia, HTC about its devices and its plans w...
   
  View All
Videos
 
First Look: LG Optimus G
The phone sports a high-end display and comes powered by a powerful processor. ...
Create QR-Codes For Free
TEC-IT releases the freeware QR-Code Studio to provide a quick and convenient way of QR code creation for every application scenario....
DoT Secretary Shares Plans For Growth Of Telecom Sector
M.F. Farooqui has recently taken charge as secretary, Department of Telecom....
Hands-On: Sony Xperia Z
Xperia Z is Sony's first entrant model in the big-screen smartphone category. ...
Hands On: Videocon A30 Smartphone
Videocon, the consumer electronics company which is known for its refrigerators, washing machine and air-conditioner has unveiled its Android-based sm...
   
View All
   
 
MWC 2014
 
MWC 2014: Tablet Lets People Feel Textures On Its Screen
Now feel what you see on your tablet, by way of ultrasonic waves....
MWC 2014: 4K Android Tablet Games To Kill Consoles, iPad
Tablet makers like Samsung want to beat the iPad by making 4K tabs. ...
MWC 2014: This Vodafone Backpack Helps Get Network In Disaster Situations
Two engineers of Vodafone New Zealand displayed the "mini" mobile network by Vodafone substructure in a backpack. ...
MWC 2014: Wilocity Chipset To Bring 'Lightening' Speed To Mobile Phones
Wilocity has developed a WiGig chipset for mobile phones that will bring lightning-fast wireless capability ...
MWC 2014: Samsung Introduces Octacore, Hexacore Chipsets
The Korean giant, Samsung unveiled two new octacore and hexacore chipsets at MWC 2014, in Barcelona. The company previously used Exynos 5 Octa 5410 ch...
MWC 2014: Alcatel Unveils PIXI 7 Tablet With Android 4.4
Alcatel arrived at the MWC 2014 with yet another low cost Android tablet, priced at $110 ...
MWC 2014: LG F70 Unveiled With Android 4.4
LG announced the new LTE-enabled Android smartphone, LG F70, at MWC 2014 in Barcelona. ...
   
View All
   
 
Events
 
19th Consumer Electronic Imaging Fair To Be Held On ...

View All
   
   
 
 

home archives contact us advertise with us
           
Magazines Portals Directories Events News Verticals Educational Institute  
Electronics for You
Open Source for You
Facts for You
Electronics Bazaar
electronicsforu.com
efytimes.com
opensourceforu.com
electronicsb2b.com
Electronics Annual Guide
EFY EXPO INDIA
EFY EXPO WEST
ELECTRONICS ROCKS
EFY Awards
OSIDAYS Expo
Electronics
Infotech
Linux & Open Source
Consumer Electronics
Science & Technology
BPO
EFY Techcenter 

Educational Kits
Kitsnspares.com
 
 
© Copyright 2014 EFY Enterprises Pvt. Ltd.
All rights reserved. Reproduction in whole or in part in any form or medium without written permission is prohibited.
Usage of the content from the web site is subject to Terms and Conditions