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How to calibrate an instrument:

1. Use high quality reference standard which is ideally 10 times more accurate (with a minimum requirement of 4 times more accurate) than the unit under test.

2. The calibration must include an appropriate number of readings across the range(s) and an uncertainty of measurement. Ideally this measurement process will be carried out against a manufacturer’s specification, or British Standard and therefore passing, or failing the criteria.

3. If the calibration meets the criteria - issue a certificate and label the calibrated equipment.

Seems simple enough. But there are many different types of instruments that measure many different parameters. To make things even more complicated, there are different levels of calibration—all our calibrations are governed by UKAS or BSI. Even though 90% of all UK calibrations are to the less restrictive BSI standard — Pennine's electrical, dimensional and acoustic labs are UKAS accredited and we are working towards accreditation for four more of our labs. So whatever your needs—such as gold standard calibration for safety critical equipment or routine fit-for-purpose process calibrations—we have the laboratories, accreditation and expertise to meet them.


Acoustic Calibration

Pennine Instruments has a model specific UKAS accreditation for the calibration of sound level meters and calibrators. See our UKAS Schedule for further information.

The Acoustic Lab also offers a fully traceable calibration service for most makes and models of acoustic measuring instrumentation. The primary equipment in use within the laboratory is an automated Norsonic NOR 1504A Calibration Test Centre with two Anechoic Chambers.

The following list illustrates some examples of equipment that may be calibrated in this laboratory:

  • Tapping Machines
  • Sound Level Meters
  • Sound Calibrators
  • Microphones
  • Preamplifiers
  • Amplifiers
  • Dose Meters


Air Velocity Calibration

The Airflow Calibration Lab has fully air-conditioned environment and contains a 5m wind tunnel. The wind tunnel generates airflow from speeds of 0.3 to 30.0 metres per second. The wind tunnel velocity and the laboratory barometric conditions are constantly monitored by precision instrumentation enabling the laboratory to offer both a UKAS or precision traceable airflow calibration service. See our UKAS Schedule for further information

The following list illustrates some examples of equipment that may be calibrated in this laboratory:

  • Thermal Anemometers
  • Rotating Vane Anemometers
  • Air Quality Meters
  • Weather Meters
  • Velometers
  • Pitot Tubes

Dimensional Calibration

The Dimensional Lab offers a comprehensive calibration service for both UKAS and traceable calibration requirements. See our UKAS schedule for further information.

The following list illustrates some examples of equipment that may be calibrated in this laboratory:

  • Angle Plates
  • Bevel Protractors
  • Combination Sets
  • Comparator Sets
  • Cylindrical Standards
  • Dial Gauges
  • Digital Read Out and Transducer
  • Engineers Squares
  • Cylindrical Squares
  • Feeler Gauges
  • Gap Gauges
  • Engineers Levels
  • Clinometer Levels
  • Micrometers (Height Setting, Depth, External, Internal Height Setting Riser Blocks, Stick, Bore)
  • Setting Rods
  • Parallels
  • Pin Gauges
  • Screw Plug and Ring Gauges
  • Plain Plug and Ring Gauges
  • Rules and Tapes
  • Straight Edges
  • Vee Blocks
  • Verniers (Calliper, Height, Depth)
  • Slip Gauges
  • Surface Plates Etc
  • Rulers and tapes
  • Roughness specimens and instruments
  • Paint thickness specimens and instruments


Electrical Calibration

The Electrical Lab offers a very comprehensive calibration service for low frequency and microwave instrumentation. Most types of low frequency instruments are available for UKAS calibration. UKAS schedule for further information.

The following list illustrates some examples of equipment that may be calibrated in this lab:

  • Voltage Sources
  • Conductivity Simulators
  • Scope Meters
  • Injection Test Sets
  • Low ohms Meters
  • PAT Testers
  • Shunts HV Generators
  • LCR Meters
  • Frequency Meters
  • Function Generators
  • Counter Timers
  • Chart Recorders
  • Calibrators
  • Tachometers
  • Microwave Testers
  • Voltage Testers
  • 17th Edition Check Boxes
  • Phase rotation Meters
  • Data Loggers
  • Multimeters
  • Clamp Adaptors
  • Clamp Meters
  • Power Clamp Meters
  • Insulation and Continuity Testers
  • RCD Testers
  • Loop Impedance Testers
  • 17th Edition Combination Instruments
  • Earth Bond Testers
  • Oscilloscopes
  • Power Supplies
  • Panel Meters
  • Watt Meters
  • Flash Testers
  • Resistance Decade Boxes
  • Resistance Bridges
  • Inductance Decade Boxes
  • Capacitance Decade Boxes
  • Current Sources


Light Calibration

Pennine Instruments has bespoke facilities for the calibration of light meters between the values of 0 lux to 20,000 lux. All calibrations are fully traceable to National Physics Laboratory (NPL) and potential customers are invited to inspect the laboratory whenever required.

> Light Meters

Miscellaneous Calibration Services

Pennine Instruments offer a calibration services in many other areas that are not contained within this web site. If you have a requirement that is not contained within our web site, please contact us.

The following list illustrates some examples of miscellaneous equipment that can be calibrated in our laboratories:

  • Coating Thickness Meters
  • Laser Distance Meters
  • Crimp Tools
  • CAT Scanners
  • Environment Meters
  • MSA Self Rescuers
  • Baltic Lifejackets
  • Weighing Scales
  • Balances
  • Force Gauges
  • pH Meters
  • Weights
  • Material Thickness Meters


Pressure Calibration

Pennine Instruments now operates a truly comprehensive pressure calibration service with four deadweight testers and a low pressure rig in operation as follows:

1 pascal to 2 kilo pascals (pneumatic)
1 bar vacuum to 1 bar (pneumatic)
1 bar vacuum to 70 bar (pneumatic)
1 bar to 700 bar (pneumatic)
1 bar to 700 bar (hydraulic)
1 bar to 2600 bar (hydraulic)

The low pressure dead weight tester has a facility for the calibration of vacuum gauges.

All calibrations are carried out in full monitored and environmentally controlled laboratory environment.

The following list illustrates some examples of equipment that may be calibrated in this laboratory:

  • Pneumatic Pressure Gauges
  • Hydraulic Pressure Gauges
  • Vacuum Gauges
  • Differential Pressure Gauges
  • Manometers
  • Transducers
  • Calibrators
  • Tyre Gauges

Roughness Calibration

Pennine Instruments maintains a Mahr Roughness Calibration System. A fully traceable calibration service is offered for both roughness measuring instrumentation and roughness specimens.

The following list illustrates some examples of equipment that may be calibrated in this lab:

  • Roughness Testers

  • Roughness Specimens

Subcontracting Calibration

The company provides a seamless, highly efficient and effective subcontractor network for calibration requirements, which may fall outside our range of activity.

The network is strictly controlled by the ISO 9001:2008 Quality Management System and all work subcontracted by Pennine Instruments is closely monitored.

Please contact us using the details on our contact page for further information.

Torque Calibration

Pennine Instruments offer a torque wrench calibration service up to 1000 Nm. The primary calibration equipment used is a Norbar ISO1000 Rig and a series of transducers.

The following list illustrates some examples of the torque equipment that may be calibrated in this laboratory:

  • Screwdrivers

  • Wrenches

  • Multipliers

  • Transducers

Temperature Calibration

Pennine Instruments maintains a temperature calibration lab offering UKAS temperature calibration by simulation for calibrators and indicators (see UKAS schedule for further information) and a fully traceable calibration service for all other temperature related instrumentation.

The following list illustrates some examples of equipment that may be calibrated in this laboratory:

  • Infrared thermometers
  • Thermocouple Probes
  • Resistance Thermometer (RTDs), Probes
  • Liquid-in-Glass Thermometers
  • Digital Thermometers
  • Temperature Calibrators
  • Thermocouple Indicators
  • Temperature Block and Baths
  • RTD Indicators
  • Thermocouple Simulators
  • Thermal Imagers
  • Chart Recorders
  • RTemperature and Humidity Meters
  • Humidity Meters