Schreiner Certified Leak Standards
Schreiner Certified Leak Standards are accredited to ISO 17025:2005 and manufactured to a NIST-traceable calibration. The standard calibration flow unit for CTS is scc/m (standard cubic centimeters per minute). The European standard flow unit is ncc/m, normal flow conditions. The chart below compares scc/m to ncc/m unit showing their temperature differences at baseline pressure.
A leak standard is a fabricated part. The Holder is the main body. Each leak standard is made to order, precisely sized to flow at an exact pressure in an ISO certified CTS calibration lab. All leak standards ship with a certificate of calibration that identifies the certified flow at a specific pressure for the manufactured unit. Our Part number identifies the holder style to be used for the leak standard. The Description field details the flow and required pressure specification for the leak standard. In the example, the part number is for an A-style holder, the unit is certified to flow at 12 scc/min at 1.5 bar (21.76 psi) using Nitrogen gas.
| Flow Range: 0.49 scc/m or less | Flow Accuracy ±6.5 % Manufacturing Tolerance ±20 % |
| Flow Range: 0.50 to 7.0 scc/m | Flow Accuracy ±0.1 scc/m Manufacturing Tolerance ±0.1 scc/m |
| Flow Range: 7.0 scc/m or greater | Flow Accuracy ±1.4 % Manufacturing Tolerance ±1.0 % |
The manufactured flow standard is sealed into one of various assemblies:
All leak standard assemblies include an inlet filter, some models are equipped with an exhaust filter.
For re-certification, the current flow rate is measured and compared to previous calibration and/or the original leak rate and pressure specification. If the current flow value is outside the allowable toleranace range it is replaced with a new orifice. All CTS-Schreiner recalibrated leak standards come with a NIST traceable certificate and specifications.Reference : schreiner-testing.com
Download Datasheet : Schreiner Certified Leak Standards
