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Calibration

Calibration following the methodology in IMO NTC 2008 and ISO standards, onboard or as laboratory calibration.

What we offerGet startedGas analyzersAmbient instrumentsEngine performance sensorsHow it worksStandards and gasesBefore you contact usOur calibration equipment in detail

Calibration

What we offer

Calibration where your instruments are.

Onboard calibration

We calibrate your analyzers and instruments onboard the vessel.

  • Analyzers, pressure, temperature and humidity
  • Place and date agreed with you

Laboratory calibration

Instruments can also be sent to us for laboratory calibration. You get the same certificate, with the result of every calibration point.

  • Laboratory calibration
  • Certificate for each instrument

Calibration

Get started

Order a calibration, or download the form and the datasheets.

    Order a calibrationTell us which instruments you have, where they are and when you need the work done.Go to the order formService request formA fillable PDF. Fill it in on your computer and send it to us with your message.Download the form (PDF)Service datasheetWhat the calibration covers and what you receive, on two pages.Download the datasheet (PDF, 2 pages)Calibration intervalsPermissible deviations and validity of instruments and gas analyzer checks, NTC 2008 Appendix 4.Download the intervals (PDF, 2 pages)

    Calibration

    Gas analyzers

    NOx, CO, CO2, O2 and THC.

    Gas analyzers

    We calibrate analyzers for NOx, CO, CO2, O2 and total hydrocarbons (THC). The calibration curve is established with ten points from zero to full scale, where the NTC requires at least six. Each analyzer gets its own certificate.

    • NOx, CO, CO2, O2 and THC
    • Calibration curve with ten points, in steps of 10 %
    • Converter efficiency and interference checks
    ME-Tech analyzer rack in the calibration roomCalibration | Analyzer rack

    Calibration onboard

    We calibrate the analyzers onboard, with certified calibration gases, so the instruments are checked where they are used.

    • Onboard calibration
    • Certified calibration gases
    • Flame ionization analyzer shown
    Calibration | Horiba HFID calibration

    Calibration

    Ambient instruments

    Pressure, temperature and humidity of the ambient conditions.

    Ambient pressure

    We calibrate ambient pressure sensors, which measure the low pressure of the surroundings.

    • Ambient pressure sensor
    • Low pressure: 0 to 1 bar

    Ambient temperature

    We calibrate temperature sensors used to measure the ambient temperature, in three points.

    • Ambient temperature sensors
    • Calibrated in three points
    • Certificate for each sensor

    Ambient humidity

    We calibrate humidity instruments used to measure the ambient humidity, in three points, in a small sealed chamber with salt ampoules.

    • Ambient humidity instruments
    • Calibrated in three points
    • Certificate for each instrument

    Reference sensors

    Ambient instruments are calibrated against reference sensors that carry an accredited calibration.

    • Reference sensors with accredited calibration
    • Result of every calibration point

    Calibration

    Engine performance sensors

    The pressure and temperature sensors on the engine.

    Engine temperature sensors

    We calibrate the temperature sensors used for engine performance measurements, including thermocouples, with a dry-block calibrator against a reference sensor that carries an accredited calibration.

    • Thermocouples and temperature sensors
    • Up to 600 °C
    • Dry-block calibrator
    Charge air temperature sensor on an engineEngine performance sensors | Charge air temperature

    Engine pressure sensors

    We calibrate the pressure sensors and gauges used for engine performance measurements, against reference equipment that carries an accredited calibration.

    • Pressure sensors and gauges
    • 0 to 10 bar
    Pressure transmitters for lubricating oil, fuel oil, charge air and cooling water on an engineEngine performance sensors | Pressure transmitters
    Dry-block calibrators and laptopCalibration | Dry-block calibrators

    Certificates

    Each sensor gets its own certificate, with the result of every calibration point and the date until which it is valid. The calibrated sensors are then used in the performance measurements, which we read together with the emission data.

    • Certificate for each sensor
    • Result of every calibration point
    • Date of calibration and valid-to date

    Calibration

    How it works

    From request to certificate.

    Step 1: Request

    Fill in the request form, or write to us through the contact page. Tell us which instruments you have, where they are and when you need the work done.

    • Instruments, make, model and serial number
    • Place and date

    Step 2: Plan

    We confirm the scope, the place and the date with you before any work starts.

    • Scope confirmed
    • Place and date agreed

    Step 3: Calibrate

    The calibration follows IMO NTC 2008. Analyzers are checked with zero and span gases, and temperature instruments with a dry-block calibrator against a reference sensor.

    • Analyzers: zero gas and span gas
    • Temperature: dry-block calibrator

    Step 4: Certificate

    Each instrument gets its own certificate, with the result of every calibration point. The certificate states the date of calibration and until when it is valid.

    • Certificate for each instrument
    • Result of every calibration point
    • Date of calibration and valid-to date

    Step 5: If a fault is found

    If an analyzer is found faulty or does not meet the requirements, we troubleshoot it with specialists and send a separate quote for the repair.

    • Troubleshooting with specialists
    • Separate quote for the repair
    Example of a calibration certificate for a thermocoupleCalibration | Example certificate

    Calibration

    Standards and gases

    The NOx Technical Code 2008 and certified calibration gases.

    NOx Technical Code 2008

    Our calibrations follow the NOx Technical Code 2008. Every analyzer and sensor must be calibrated within the deviation limits and the validity period that the code sets for that instrument (Appendix 4, section 1.3 and tables 1 to 4). A calibration establishes the calibration curve. A verification, made before each analysis, checks the instrument with a zero gas and a span gas above 80 % of full scale (section 6). These are the sections we use most.

    • Appendix 4, section 5: calibration curve of at least six points
    • Appendix 4, section 5.4.1: analyzers calibrated not more than three months before testing
    • Appendix 4, section 6: verification with zero and span gas
    • Appendix 4, section 1.3 and tables 3 and 4: calibration intervals and permissible deviations, in our PDF
    Converter efficiency checker used for analyzer calibrationCalibration | Converter efficiency check

    Calibration gases and reference sensors

    Zero gas is purified nitrogen. Span gas comes with a certificate from an accredited gas supplier. The gas, concentration, bottle number and expiry date are recorded on the calibration certificate.

    • Purified nitrogen as zero gas
    • Span gas with a certificate from an accredited supplier
    • Certified calibration gases to your specification
    • Reference sensors with accredited calibration
    • Traceable to reference sensors with accredited calibration
    Pressure gauges on a gas bottle regulatorCalibration | Gas bottle regulator
    See alsoStandard emission measurementsAnnual SCR spot checkThe NOx Technical Code 2008 in detailCalibration intervals (PDF)

    Calibration

    Before you contact us

    What helps us give you a clear quote.

    Send us the request form, or write to us through the contact page.

    Instrument details

    Send the make, model, serial number and measuring range, and a previous certificate if you have one. For gas analyzers, tell us which components you measure.

    • Make, model and serial number
    • Measuring range
    • Previous certificate

    Working condition

    Tell us about faults, alarms or failed checks, and list what belongs with the instrument, such as probes, sampling lines and docking stations.

    • Faults, alarms or failed checks
    • Probes, sampling lines and accessories

    Required result

    Tell us whether you need a calibration or a functional check, what the vessel requires and when you need it. Any repair is quoted separately.

    • Calibration or functional check
    • Vessel requirements and deadline
    • Repair quoted separately

    Order a calibration Download the request form (PDF)

    Calibration

    Our calibration equipment in detail

    The equipment we use to calibrate analyzers and sensors.

    Analyzer calibration

    The equipment we use to calibrate and check the gas analyzers.

    • Signal NOxgen III, for converter efficiency
    • Horiba SGD-710C gas divider
    • Certified calibration gases to your specification

    Sensor calibration

    The equipment we use to calibrate the pressure, temperature and humidity sensors.

    • Pressure calibrator
    • Dry-block calibrators for temperature
    • Sealed humidity chamber with salt ampoules (HygroPalm)

    Calibration due before your next campaign?

    Onboard or as laboratory calibration, with as-found and as-left certificates.

    Contact us