Key facts
- Brand
- Agilent
- Model
- NW25
- Industry
- Industrial
- Documents
- 2
- Languages
- EN
- Last added
- 2012-06-07
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Agilent Technologies 979 Detector NW25 Calibrated Leak: Instructions
This document provides instructions and technical information for the Varian NW25 Calibrated Helium Leak. The device is designed with an integral helium reservoir and an isolating valve, featuring either an NW25 or a 1-1/8 inch diameter sealing surface to fit the test port of any Varian Leak Detector.
The manual explains the principles of operation, noting that helium permeates through the pyrex-glass finger. It details how leak rates are affected by temperature and depletion over time, providing a table of typical depletion rates for various PIN suffixes. Users are advised to leave the valve open when not in use to maintain stability.
All Agilent NW25 documents by type
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Questions answered in these manuals
What is the purpose of the NW25 Throttle Valve?
It combines a throttle valve and tuning leak functions to provide an uncalibrated source of helium for tuning Leak Detectors.
From: Agilent Technologies 979 Detector NW25 Throttle Valve Instruction Sheet
Does this valve require a separate helium supply?
No, it uses the naturally occurring helium in air (about 5 ppm) to create a leak rate signal.
From: Agilent Technologies 979 Detector NW25 Throttle Valve Instruction Sheet
What sealing surfaces does the NW25 calibrated leak fit?
It is furnished with either an NW25 or a 1-1/8 inch diameter sealing surface to fit the test port of any Varian Leak Detector.
From: Agilent Technologies 979 Detector NW25 Calibrated Leak: Instructions
How should the calibrated leak be stored when not in use?
When the calibrated leak is not in use, it should always be left with the valve open and stored at the same temperature at which it will be used.
From: Agilent Technologies 979 Detector NW25 Calibrated Leak: Instructions