Ordering Information
The VSLC Calibrators can be ordered for various adjustable leak-rate ranges commonly used for sniffer-type leak detection. When ordering or requesting a quotation, please provide the Part Number and also specify the Approximate Leak-Rate Range requested including your preferred leak-rate Units (for example, "approximately 1 to 9x10-5 atm-cc/sec"). The Range specification is "approximate" because the minimum and the maximum value of the range will vary slightly for individual leaks due to the Manufacturing Variance. The leak-rate range available for each VSLC Leak is approximately a factor of 10, so the leak-rate range should be requested as approximately 1 to 9x10-x atm-cc/sec.
A leak-rate range extending between two decades can also be requested, such as from 5x10-6 up to 5x10-5 atm-cc/sec. (This is also an appropriate way to order a VSLC if you want to be able to obtain an exact leak rate of 1.0 x 10-5 atm-cc/sec.) An alternative specification is to identify the "Central Leak Rate" for a VSLC Leak, such as 5 x 10-5 atm-cc/sec, and VTI will build the Leak to provide that leak-rate at a mid range pressure on the 400-psig gauge. Using additional calibrations at a lower and higher pressure, the total leak-rate range of the Leak then extends above and below this central value. For each VSLC Calibrator, it is noted that exact leak rates like 4.5 x 10-5 can be obtained within its available range.
Without requiring specification, the VSLC Model Calibrators always have a fill/exhaust valve to allow the users to exhaust gas from its 110 cc reservoir to lower the leak rate, or to refill the reservoir to a higher pressure (using their clean gas supply) to increase the leak rate. The 400-psig pressure gauge on the standard VSLC model is used in VTI's NIST-traceable Leak-rate Calibrations and preserves the NIST-traceability of the calibration for the user as the pressure and leak rate are varied.
Various leak-rate units can be specified and the calibration data will then be reported in the units requested. Please contact us for assistance if you have any questions or want a customized VSLC Leak.
"Special Orders" are everyday products for us! Just let us know what you need!
Note:
The most commonly used gases other than Helium are mixed gases, such as helium-nitrogen, for which the Gas Code is always: MIX. The composition of any mixture then needs to be specified in detail. Other common gases with their Codes are: Nitrogen (N2), Argon (AR), and Methane (CH4).
Please consult with our Calibrated Leak Technical Staff regarding these custom products.
Part Number Build-Up
The Part Numbers for VSLC Sniffer Calibrators for gases other than Helium are constructed as follows:
VSLC-X-3P-AA
where X = the code for the Leak Rate "Decade" within which an adjustable range of leak-rates is being requested,
where 3P designates three calibration points for any gas other than Helium,
and AA designates the gas requested.
Leak-Rate Ranges and Part Numbers for VSLC Model Leaks
| Examples of requested Leak-Rate Ranges | Leak-Rate Code (X): | Example Part Number |
|---|---|---|
|
1 to 9x10-3 atm-cc/sec 1 to 9x10-4 atm-cc/sec 5x10-4 to 5x10-5 atm-cc/sec 1 to 9x10-5 atm-cc/sec 3x10-5 to 3x10-6 atm-cc/sec 1 to 9x10-6 atm-cc/sec 1 to 9x10-6 atm-cc/sec (for Argon) |
3 4 4/5 5 5/6 6 6 |
VSLC-3-3C-HE VSLC-4-3C-HE VSLC-4/5-3C-HE VSLC-5-3C-HE VSLC-5/6-3C-HE VSLC-6-3C-HE VSLC-6-3P-AR |
