Gas Calibration Equipment

Calibration Frequency - How often should you calibrate?


The calibration frequency for gas detection instruments really depend on the type of use a customer will give the instrument. For example, some users who require the readings to hold up in court as data for certain legal applications must calibrate both before and after each test or each series of tests in order to remove all doubt of the proper functioning of the instrument. The other extreme is someone who only uses the instrument a couple times a year for non-critical applications. This type of user should calibrate their instrument before each use.

What we generally recommend is that users develop a frequency of calibration that is tailored to their application and usage Initially, the user may begin by calibrating once per week and note any changes or adjustments needed to the calibration. If, week after week, there is very little or no adjustment needed, then the calibration frequency can decrease to the point that there will be only a small adjustment needed when calibrating.

In general, for most users, this frequency ends up being somewhere between one and three months. For users who do not wish to develop their own frequency, we recommend that they calibrate once a month.

For users who "bump test" their instrument prior to each use, the calibration cycle can be extended to 3 to 6 months of instruments that successfully pass the bump gas test. There is no universal standard for pass/fail tolerance on a bump test. The tolerance must be determined by the user based on frequency and usage. A typical tolerance could be +/- 20% or +/- 30%, or a simple triggering of the instrument's alarm.

A precaution to note.

It is generally recommended that a bump test or calibration be performed if it is suspected that the instrument has been subjected to any condition that could have an adverse effect on the unit (sensor poisons, high gas concentrations, extreme temperature, mechanical shock or stress, etc.)


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Regulators for 17/34L Steel Cylinders

  • Regulators are necessary equipment used to accurately deliver calibration gas from the cylinder to an instrument. Each regulator is designed to fit on a specific set of cylinders. There are two common fittings these regulators use to connect to the non refillable cylinders. One common fitting is a CGA 600 connection and fits on the 17 & 34 liter steel cylinders. Make sure the regulator you purchase fits the cylinder you have.

Regulators for 29AL/34AL/58 AL Aluminum & 103L Steel

  • Regulators are necessary equipment used to accurately deliver calibration gas from the cylinder to an instrument. Each regulator is designed to fit on a specific set of cylinders. There are two common fittings these regulators use to connect to the non refillable cylinders. One common fitting is a CGA 600 connection and fits on the 17 & 34 liter steel cylinders. Make sure the regulator you purchase fits the cylinder you have.

Cylinder Recycling

  • The Calgaz patented cylinder recycling tool is designed to decommission the DOT 39 cylinders making them easier and safer to discard. Proper use of the tool will leave a visible hole in the cylinder valve area. Empty cylinders may be collected by local metal recycling companies or simply discarded.