Best Blogs of Calibration and Instrumentation on Eurocaltech

Cable Locating techniques,To locate target utilities, perform a sweep of the area and map the direction of conductors. Trace the lines using induction mode, selecting the same frequency as the locator, and placing the transmitter on its side. Avoid signal coupling by using signal clamps, identifying points where lines may be bonded, using low signal frequencies, and using a double-ended connection to bypass ground return. Choose a signal application point furthest from other lines and avoid using existing structures for ground connections. Signal and ground connections can be made using manhole covers, lighting columns, or metal manhole covers. Using a double-ended connection is useful for large diameter water pipes and gas distribution pipes in heavily congested areas. Connect the transmitter to an access point on the target line and connect the transmitter ground with a long cable to another access point further along the line. This method ensures the same level of current is detectable around the circuit and the locator display remains constant if the depth of the line does not change.

Top major process parameters (MPP) in the industry include pressure, temperature, level, flow, and Ph measurements. Pressure is a crucial parameter, with various sensors used depending on application. Popular companies for purchasing pressure transmitters include Baumer, MBA, Rosemount, SITRANS P, Deltabar, Cerabar, and Endress+Hauser.

RADAR LEVEL TRANSMITTER CALIBRATION,Set up a guided wave radar level transmitter, HART communicator, power supply, and multimeter. Check the configuration of the lower and high range values, and ensure data input matches the datasheet. Fill the transmitter chamber with water up to 0% level, adjust the mA output, and set the condition to 100% level. Adjust the transmitter's output if necessary.

The Ten-Point Checklist customer must check against Calibration Services to ensure a successful calibrationUse an accredited laboratory: Accredited labs are required in many industries and must submit to regular technical audits. They also have publicly available "scopes of accreditation" that provide transparency and traceability in calibration.

Defining Accreditation and 17025Accreditation is a crucial term in the field of laboratory accreditation, providing official authorization to or approval of calibration laboratories. It can be defined as providing credentials, vouching for conformity with a standard, or recognizing an educational institution as maintaining standards that qualify graduates for higher or more specialized institutions or professional practice. In the U.S., four bodies are mutually recognized to provide accreditation to ISO/IEC 17025: the National Voluntary Laboratory Accreditation Program (NVLAP), the American Association for Laboratory Accreditation (A2LA), the International Accreditation Services (IAS), and Assured Calibration Laboratory Accreditation Select Services (ACLASS).

Surface Plates – Accuracy and CalibrationThis technical bulletin discusses the accuracy and calibration of granite surface plates, based on the American national standard (ANSI) ASME B89.3.7-2013, Granite Surface Plates. Surface plates are made of various types of granite and are massive, stiff, and hard. The top work surface is lapped flat and smooth to provide a critical reference surface for many types of dimensional measurements. The quality of surface plates had been standardized for decades through the Federal Specification GGG-P-463c, which was made inactive in 2013 when the ASME B89.3.7 standard was published.

Calipers – Accuracy, Calibration & Calibration AccuracyThis technical bulletin from Mitutoyo America Corporation focuses on the accuracy and calibration of digital, dial, and vernier calipers. The bulletin is based on the American national standard (ANSI) ASME B89.1.14-2018, which covers the most important metrological characteristics of calipers. These characteristics are called the partial surface contact error (E) and the scale shift error (S). The partial surface contact error applies to measurements made using the outside measuring faces, while the scale shift error applies to measurements using any other measuring faces available on the caliper.

what is calibration,Calibrations can be confusing due to different expectations between the requesting and providing organizations. ASME B89.7.1 explains that calibration measurements have three purposes: determining reference values, determining test values for verification to tolerance, and determining necessary adjustments to measuring equipment. Reference values, such as the nominal value on a gage block, are determined and reported on a calibration certificate.Verification to tolerance limits is the most important aspect of calibration, and the necessary calibration method may differ from the method used to determine and assign a reference value. The issued calibration certificate should include measured values, tolerances, and a statement of conformance. A new calibration certificate and calibration label can be issued even if the equipment is out of tolerance. The biggest confusion in calibration is with adjustments to measuring equipment accuracy. Many U.S. industry members believe calibration includes necessary adjustments to bring the equipment back to manufacturer specifications. To avoid confusion, clear expectations and careful usage of the word "calibration" when requesting calibration services.

Decision Rules, TAR and TURDecision rules and associated ratios like the TAR are all related to risk in measurement systems. Organizations must determine what decision rule meets their unique needs and which ratios, if any, are considered acceptable. The purpose of this technical bulletin is to add clarity to the simple acceptance and rejection decision rule regarding how to calculate the ratios often part of the decision rule.

SF6 Leak Pointer RepairThe SF6 Leak Pointer is a lightweight, cordless device that can detect SF6 leaks in seven sensitivity levels with a response rate of less than one second

MOST COMMON SF6 GAS HANDLER FITTINGS,Businesses working with sulfur hexafluoride (SF6) are aware of the importance of taking precautions against accidental emissions. Common fittings for safe SF6 handling include compression fittings, flange couplings, flare fittings, National Pipe Thread (NPT), parallel thread, and tongue and groove fittings. The sealing principle allows equipment to be secured without a sealing compound, maintaining high levels of gas tightness even under extreme

SF6 GAS HAZARDS SF6 gas is a crucial insulator in medium- and high-voltage electrical equipment, used globally to insulate live electrical parts and manage electrical current flow. However, it poses health hazards due to its asphyxiant nature. The Kyoto Protocol identified SF6 as one of six key greenhouse gases contributing to human-driven climate change. SF6 emissions can stay in the atmosphere for up to 3,200 years, and high concentrations can displace oxygen, affecting the respiratory system and causing health issues for workers. The most common SF6 gas hazards include SO2 byproducts, which can cause irritation to the eyes, nose, and throat, as well as oxygen displacement due to its weight. Accidental leaks in gas-insulated equipment (GIE) can lead to malfunctions and short circuits, resulting in costly repairs and accidents. Fires are rare in outdoor installations, but indoor installations pose a greater risk.

SF6 GAS HANDLING PRO TIPS ,SF6 gas is a potent greenhouse gas commonly used in electric power systems and other industries. It is non-toxic and thermally stable, but it can remain in the atmosphere for over 3,000 years if released into the environment. To minimize the risk of emissions, it is crucial to use proper gas handling practices.

A Quick Guide to Temperature Sensors and Calibration,Temperature is a "derived metrology" that means we cannot measure temperature directly but must measure it indirectly. There are contact thermometers, such as Liquid in Glass (LIG) thermometers, resistance thermometers, and voltage difference from a thermocouple, and non-contact thermometers that measure thermal radiation emitted by all objects. A challenge in making good measurements is to ensure that the temperature sensor is at the same temperature as the body of interest, ensuring the sensor and object are in thermal equilibrium. The most commonly used temperature sensor in industry is the thermocouple, which relies on the Seebeck effect and is constructed from two dissimilar metals. Resistance thermometers, such as the Platinum Resistance Thermometer (PRT), are widely used in industrial instrumentation due to their narrower ranges and higher cost.

The depth of immersion of the sensor PRT, SPRT, Thermocouple,The depth of immersion of the sensor is important, as it can affect the accuracy of the measurement.Dry Blocks are designed to have good uniformity, typically over the bottom 40mm of the pocket. Best practice is to place a calibrated probe in the block and compare the thermometers under test to the reference probe. When calibrating sensors in Dry Blocks, the choice of when to use the controller value or a reference probe must be made based on the application, number and types of sensor, temperature range, and required accuracy.

Water, Ice and the Triple Point – a review of the WTP,The temperature of pure ice and water is +0.0025°C, not 0°C as most people assume. This is because water rapidly absorbs air when in contact with it, causing air saturation. To remove this dependence, a vacuum can be created, but as the vacuum increases, the water begins to boil or vaporize, limiting the vacuum we can achieve. The mixture of ice/water and water vapor in equilibrium is the water triple point, with its temperature being 0.01°C by definition.

EUROCALTECH Calibration offers a range of standard platinum resistance thermometers, including quartz-shell, quartz-shell, and high-temperature metal-shell models. These thermometers are designed with world-class features like gold-plated spade lugs, strain-relieved four-wire cable, convection prevention disks, and the finest quartz glass. They also provide a working standard and high-temperature metal-shell option,5681, 5683, and 5684 Quartz-Sheath SPRTs,5681, 5683, and 5684 Quartz-Sheath SPRTs,5686-B Glass Capsule SPRT,5686-B Glass Capsule SPRT,5698-25 Working Standard SPRT,5698-25 Working Standard SPRT ,5699 High-Temperature Metal-Sheath SPRT,5699 High-Temperature Metal-Sheath SPRT

standard platinum resistance thermometer,The Standard Platinum Resistance Thermometer (SPRT) is designed to allow the wire to expand and contract strain-free, providing superior performance. However, all SPRTs are more prone to damage and shift from handling. When a thermometer is strained, the platinum is stretched and thinned, increasing resistance. Annealing is a process that returns the crystal lattice of the platinum to its original condition, reducing resistance.

Platinum Resistance Thermometer: Self HeatingPlatinum resistance thermometers have a sensing element at the tip of the sheath, which contains a fine platinum wire to prevent shorting during heating/cooling. To measure resistance, a temperature measurement device passes a known current through the sensing element and develops a voltage across the sensor. The resistance (Rt) is calculated using ohms law, where tE is the temperature due to the environment being measured and?tSH is the additional temperature increase due to the self-heating effect. The magnitude of self-heating depends on factors such as the current size, nominal resistance, thermometer construction, and thermal contact with the environment.

Thermocouple compensating cables and industrial thermocouples at best price, A thermocouple is a device consisting of two wires of different metals welded together, insulated with PTFE, ceramic, or MIMS, and terminated in a plug with connectors made from the same material. They generate an output when a temperature gradient exists.

Gas detector sensor at low price,Catalytic diffusion sensors detect combustible gases and vapors by wounding wire into coils doped with catalysts. These coils are matched into pairs of reference and sensing elements, creating a combustible gas sensor. The sensor is connected to a Wheatstone bridge, which detects changes in resistance. When a combustible gas comes in contact with the sensor, the active element burns the gas, increasing its temperature. The reference element remains unchanged, indicating a positive combustible signal. The sensor must be intrinsically safe to prevent ignition in a combustible atmosphere. Electrochemical sensors consist of a working electrode, counter electrode, and reference electrode enclosed in a liquid electrolyte. Gas diffuses into the sensor, causing an electrochemical reaction, either oxidation or reduction. The electronics detect and amplify this current, displaying gas concentration in parts per million (PPM) for toxic gas sensors and percent volume for oxygen sensors.

Mud pressure gauge failure ,Pressure gauge failure is a critical component in any production facility, reducing the risk of accidents and causing serious consequences. The top eight causes of gauge failure include extreme temperature, overpressure/sudden depressurisation, mechanical vibration, corrosion, misuse, pulsation, clogging, and steam.Temperature can significantly affect gauge reading, with a ±0.4% per 10°C change in temperature from ambient. To avoid overpressure issues, choose gauges with a pressure range greater than the designed overpressure or consider overload stops or vacuum stops. Mechanical vibration can cause incremental damage that may nudge the pointer off the zero mark. Different gauges have different levels of vibration, and viscous damped movement and liquid-filled gauges can protect against vibration.

The Difference Between Gauge, Absolute and Differential Pressure Measurement,Absolute pressure is a base reference for pressure measurements, using a perfect vacuum or air-free space as its base. It is used in applications such as high-accuracy vacuum measurement, low pressure in distillation vacuum columns in petroleum refining, and checking for leakage in tanks processes. Gauge pressure (Pg) is the difference between atmospheric pressure (Pamb) and absolute pressure (Pabs). It is used in laboratories to measure variations in air conditioning and air control, in instruments to measure levels in atmospheric tanks, and in process tanks and pipes where the working pressure is greater than the variations in atmospheric pressure.

Digital pressure gauges at lowest or cheapest price ,Digital pressure gauges are instruments used to accurately measure pressure in liquid or gas, offering advantages such as longer calibration, better performance in extreme vibration, pulsation, and corrosion, clear readings, customizable settings, and data logs. However, they require a power source, are expensive, require special certifications, and may need to be replaced and calibrated more frequently than an analogue pressure gauge.