Calibration Services

Anemometers for sale

2009-06-07T04:22:00.000-07:00

The complete range of Testo digitial instruments are on sale at Young Calibration. Ranging from thermal anemometers, vane anemometers, temperature, humidity, air pressure and manometers are now available from Young Calibration. All instruments are available with traceable and UKAS accredited calibration certificates.

Linearising Automotive MAF Sensors for test bench use

2009-06-03T11:06:00.000-07:00

A 10 point mass air flow vs voltage calibration is sufficient to achieve a ± 1% accuracy throughout its flow range. With the flow calibration data entrered into a linearising module (popular units are London Electronics INT P duisplay modules) a linear 4- 20 mA or 0 - 10 Volt output signal can be generated for input into the test bed data acquisition system.

RT300 Respical Software

2009-05-29T09:00:00.000-07:00

Does anyone have available the procedure for calibration adjustment of Respical 300 analyzers and the pin outs for the rear D connector?

Gemini Oval Gear Meter Calibration

2009-05-25T09:57:00.000-07:00

A recent contract award for the calibration of over 100 Gemini and Macnaght oval gear meters was secured by Young Calibration. The various size Gemini / Macnaught flowmeters, covering G05, M05, G1, M1, G2 and M2 models are to have multi point calibrations on the customer fluid, being a flavoured essence.

Calibrations are completed in a temperature and pressure controlled test line with repeatability, and stop / start hysterisis tests undertaken for each individual flowmeter. Units are then chemically sealed and bagged prior to dispatch and return to the customer.

F1 Wind Tunnel Yaw Probe Calibration

2009-05-25T09:32:00.000-07:00

Young Calibration recently commissioned a 5 hole yaw and pitch calibration fixture, enabling multihole pitot tubes to be calibrated at ±60° yaw and pitch angles, and upto 100 m/s air velocity.

UKAS ISO 17025 Hydraulic Pressure Calibration Services

2009-05-11T09:50:00.000-07:00

Young Calibration adds Hydraulic Pressure to its' UKAS accreditation schedule, covering all types of pressure gauges, transmittersm transducers and sensors. Calibration services across 5 - 1100 bar g can be UKAS accredited. A best measurement uncertianty of 0.009% + 90 Pa is available.

Calibrations can also be undertaken at customer sites traceable to national standards.

UKAS Gas Flow Calibration

2009-05-03T06:59:00.000-07:00

New ISO 17025 accreditation services for the calibration of low gas flowmeters. All types of air flow meters are covered, including, thermal, variable area, coriolis, laminar flow, turbine and orifice meters. UKAS accreditation covering o.2 - 800 lpm (volume of mass flow based) with a best measurement uncertainty of 0.5%.

UKAS Anemometer Calibration for all type of Wind Speed Instruments

2009-05-03T06:40:00.000-07:00

The UK's widest range UKAS accredited air velocity calibration facility, covering 0.05 - 80 m/s for UKAS accredited calibrations on thermal, pitot, vane and rotating cup anemometers. Velocties up to 100 m/s can be attained, and calibration of 5 hole yaw probes can be undertaken.

Young Calibration Ltd provide high accuarcy air velocity, gas flow and fluid Flow Meter Calibration and is a UKAS accredited Test & Calibration Laboratory.

Gas Pressure UKAS ISO 17025

2009-04-29T11:23:00.000-07:00

Young Calibration laboratory nows adds Gas Pressure to the UKAS schedule. Sensors, transmitters, transducers, gauges and swicthes can be calibrated. Absolute sensors such as barometers can also be calibrated.

UKAS Air Velocity Calibration

2009-04-13T03:19:00.000-07:00

Young Calibration recently extended their UKAS accredited schedule to include the calibration of pitot tubes and anemometers. A new high accuracy open jet wind tunnel can provide UKAS calibration for any type of air velocity measurement devices covering 0.05 to 80 m/s with one of Europes best measurement uncertainties.

Variable Area Flowmeters

2008-11-19T14:54:00.000-08:00

Robust and Economical Flow Measurement
Ever wanted to quickly and cheaply measure the flow rate of a gas flow or water flow, then one of the simplest and most economical flowmeters on the market is the variable area type flowmeter. Often referred to as a rotameter or glass tube flowmeter, this is one of the most economical and reliable instruments for measuring flow. They are available in a wide variety of configurations for differnet gases, fluids, temperatures and pressures, all with different styles of connections. The flowmeter requires no power and in its smallest form can be carried in your pocket.
It consists of a simple measurement principle of a float moving up and down in a graduated tapered glass tube. As the flow enters the bottom of the meter, which is positioned in a vertcal position, the flow pushes the float upwards until a suffient gap has grown between the tube wall and the float, at this point the float is in equilibrium. Decreasing the flow causes the float to fall and increasing the flow causes the float to rise. With a calibrated graduated scale marked on the tube, the positioning of the float then determines the flow rate through the meter. The float is often a cone shaped slug in the larger meters and a ball in the smaller meters.
The accuracy of the flowmeter varies from manufacturer to manufacturer but typically ranges between 1 and 5% FSD. Typical flowmeters on the market include models from Omega, KDG flowmeter, Brooks, Platon, Fischer Porter, Yokogawa and Krohne, to name a few. You will generally find the variable area flowmeter is specified for use with a specific air or gas, at a standard air density. To gain the best from your flowmeter your operating conditions should be specified at the time of order, as the manufacturer will configure the meter to suit. To improve the in-use accuracy of the meter it will be necessary to measure the temperature and pressure of the flowing media and correct for the difference in tube reference conditions. In applications where the meter is operating close to the tube reference conditions, it is often found that no temperature or pressure measurements are taken, and the tube reading is read directly.
During use the meter will often accumulate foreign material on the tube walls or on the outside of the float, and will cause inaccurate readings, often resulting in the float sticking in the tube. Even worse, if the float has been allowed to hit the end stops of the meter this can permanently damage the meter, and replacement parts will be required. It is essential to maintain a regular calibration of the flow meter when any errors and maintenace issues can be rectified during the calibration process. When organising the calibration of your variable area flowmeter, request the calibration is undertaken on the actual gas/fluid specified for the flowmeter, although it is not always, it is the ideal calibration method. Some calibration laboratories can only calibrate on air or water and then theoretically correct for density changes. This can often incur large calibration errors especially on the smaller size meters. Specialist flow calibration laboratories will often have facilities for flow calibrations on air, helium, argon, propane, nitrox, oxygen, carbon dioxide and with the use a a gas divider can also undertake specific gas mixtures as required.

Young Calibration Ltd, specialists in Flow Calibration services for air and fluid flowmeters. UKAS ISO17025 accredited.

Understandind Flow Meter Performance & Calibration

2008-11-19T14:31:00.000-08:00

Understanding Flowmeter Performance and Calibration
The importance of understanding your flow metering application and undertaking careful monitoring and maintenance of your flow meter system will ensure your flow readings continue to give repeatable and accurate readings. Having received thousands of flow meters for routine re-calibration, it is often the end users’ lack of knowledge of their application, which creates the largest measurement errors, rather than the errors observed within a flowmeter calibration.
Typical Example
“Mr Plant”, a Maintenance Engineer has just moved to a new company and has inherited a mirage of old, new and modified instrumentation across the plant. For years gone by, the flowmeters have been removed from the pipe work and sent for re-calibration during the summer shutdown. The calibration company undertakes its routine calibration and sends the meter back, ready for installation back into the plant. Great, all systems back underway and everyone’s happy!
Well, all was great until “Mr Plant” comes along and starts to look into the processes involved. Being more of a temperature and pressure instrumentation specialist, he wasn’t quite sure of the flow metering issues, and so contacted a specialist calibration laboratory, dealing with flow meter calibrations. It turns out the meters being used were correctly specified for their application and have been giving excellent low measurement drift year on year. But amazingly they had been sent for calibration for seven years, and calibrated on water, but have been installed in an oil process line running at 30 cSt viscosity. The outcome was a 3 – 5% error on all his flow measurements.
This is an all too occurrent story seen within flow laboratories, which can be easily be rectified with a basic understanding of flow metering systems. There are many parameters which can effect a flow meters’ calibration, but remembering a few of the larger contributors will help you achieve a more reliable and accurate performance from your flow system. The key contributors which can affect a flow meters performance are; fluid type, fluid viscosity, fluid temperature and meter installation.
There are now many laboratories offering flow meter calibrations for different types and sizes of flowmeters, but ensuring you have your meter calibrated on the correct operating fluid will play a large part in the accuracy of your flowmeter.
Measurement Traceability
Once you have identified a suitable laboratory for your flow meter calibration, ensure the laboratory has a complete line of traceability for the “Calibration Rig”, not just for a master meter installed within the line. You will find many of today laboratories have reference master meters installed within the calibration line, which they claim to be traceable back to a national standard, where this maybe UKAS, DKD, NMI, etc. This is not sufficient evidence for your line of traceability; you must ensure the whole calibration rig as an integrated system is assessed for all its components of uncertainty, to give a true line of traceability. Using an “accredited” calibration laboratory will ensure these requirements are met, as they are routinely assessed by the approving body.

Adrian Young is the Managing Director of Young Calibration Ltd, specialist in Flow Meter Calibration and is a UKAS accredited Test & Calibration Laboratory.