Ordering Information
The VSLT 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 3 to 8 x 10-5 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 VSLT Leak is limited to somewhat less than a factor of 10, so the leak-rate range should be specified as approximately 1 to 6, 3 to 8, or 4 to 9 x 10-x atm-cc/sec.
A leak-rate range extending between two decades can also be requested, such as from 6 x 10-6 up to 3 x 10-5 atm-cc/sec. (This is also an appropriate way to order a VSLT 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 VSLT 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 VSLT Leak, it is noted that exact leak rates like 4.5 x 10-5 can be obtained within its available range.
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 VSLT Leak.
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Note:
Without requiring specification, the VSLT Model Calibrator always has 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 VSLT 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.
Part Number Build-Up
The VSLT Series Part Numbers are constructed as follows:
VSLT-X-3C-HE
where X = the code for the Leak Rate "Decade" within which an adjustable range of leak-rates is being requested,
where 3C designates three calibration points,
and HE designates that it is a Helium gas leak.
The X codes are listed below. As noted above, the actual range of leak rates requested within that decade/range should also be specified.
Leak-Rate Ranges and Part Numbers for VSLT Model Leaks
| Examples of requested Leak-Rate Ranges: | Leak-Rate Code (X): | Example Part Number: |
|---|---|---|
|
1 to 6x10-4 atm-cc/sec 6x10-4 to 3x10-5 atm-cc/sec 3 to 8x10-5 atm-cc/sec 6x10-5 to 3x10-6 atm-cc/sec 3 to 8x10-6 atm-cc/sec 4 to 9x10-7 atm-cc/sec |
4 4/5 5 5/6 6 7 |
VSLT-4-3C-HE VSLT-4/5-3C-HE VSLT-5-3C-HE VSLT-5/6-3C-HE VSLT-6-3C-HE VSLT-7-3C-HE |
