He Check Lite - Underwater Technology
Contents
1. compressed air you should wait at least 10 minutes from the last analysis before again turning on He Check lite This is the necessary time to allow a complete emptying of any traces of helium from measurement chamber To perform the measurement chamber air mix flushing proceed as stated in the following 1 Connect He Check lite to a cylinder containing pure air mix as explained in Connections Setup chapter of this manual 2 Wait about 60 seconds during this time the injected flow of air mix will eject out of measurement chamber any unknown residual gas mixture 3 Detach He Check lite from air cylinder 4 Power up He Check lite and wait until the end of automatic zero function calibration Battery Power Indicators For proper operation He Check lite requires a 9 Volts alkaline battery not supplied in the package On the display lower row is permanently reported voltage of the running battery when battery voltage goes below a value 12 of 7 9 volts the He Check lite residual autonomy is short and consequently is advisable to schedule battery swapping out Helium 13 496 Bat 7 8V The alkaline battery must be definitely swapped out when display report the Lo Bat message empty power battery alarm Helium 13 496 Bat 7 8V To change power battery Power off He Check lite operating the ON OFF switch open the battery compartment placed on the rear of device remove the empty batte2. the free side of the measurement tube into the flow regulator input orifice mounted on the front panel of He Check lite Push lightly until end run is reached Connect the other side of the measurement tube the one with quick connector to the cylinder using the inflator low pressure hose of your first stage To disconnect the measurement tube apply a light pressure with your fingers on the input orifice ferrule and at the same time pull out the tube Gas Mixture Analysis Recommendations Before starting the gas mixture analysis you should be sure that there is no water or moisture at any connection point in any connection tube or in the tank Be advised that helium sensor may be damaged by the water contact The gas flow entering in measurement chamber must be regulated at about 0 5 liter per minute such flow is provided by using an embedded precision flow regulator Make sure that during calibration measuring operation the inflator hose quick connector is properly locked and that the other end of measurement tube is firmly inserted into the flow regulator input orifice The calibration aka automatic zero function is automatically performed at every power up using air as reference gas mixture You should connect He Check lite to the jacket inflator hose only after you have opened oylinder valve You must use only the measurement tubing supplied in the He Check lite package Do not attempt to use unauthorized hard
3. He Check lite PORTABLE HELIUM ANALYZER User s Manual He Check lite User s Manual Edition 2006 Revision 3 English Version Published by UNDERWATER TECHNOLOGY www underwatertechnology com info underwatertechnology com Printed by UT in 2006 Index Safety and General Informations Package Contents Overview of Features Technical Specifications Connections Setup Gas Mixture Analysis Recommendations 4 Analysis Operations Measurement Chamber Air Flush Battery Power Indicators 12 Warranty 13 Safety and General Informations This manual has been developed for user s safety Please read and understand it completely before using the analyzer You also should understand that this user manual is a remarkable component of He Check lite so it should be always kept together with instrument itself User assumes all responsibility for use of He Check lite and by using it indicates that she he has read and understands the owner s manual Please refer to the Warranty section in this manual and to the provided Product Warranty Registration Card for details about the Limited Two Years Warranty WARNING Using breathable gas mixture containing helium may be extremely dangerous so you should be properly trained for such activities Also you should adhere to well accepted standards and procedure for technical diving SCUBA divi
4. ng including the use of compressed air and any gas mixture underwater is an activity that has inherent risks An individual may experience injury that can result in disability or death Underwater Technology shall not be liable for incidental or consequential damages resulting from use misuse abuse neglect alteration failure to perform maintenance as instructed or unauthorized repair or service of the instrument The He Check lite is not meant to replace good gas management practices or handling techniques it is an additional tool to determine the content of helium in gas mixture You should also use another similar instrumentation to verify results of your gas mixture analysis The information contained in this document and the technical specifications of instrument itself are provided as is and are subject to change without any notice Package Contents The He Check lite package includes the following items He Check lite portable helium Analyzer Measurement tubing equipped with flow regulator set to 0 5 liters per minute and inflator hose quick connector Carrying Case This User s Manual Warranty Product Overview The He Check lite helium analyzer is a hand held device specifically designed to confirm the helium content in diving cylinders and is an invaluable tool for all technical divers Fast and easy to use it can be connected directly to the jacket low pressure inflation h
5. ose or directly to the cylinder valve using an optional DIN adapter The He Check lite is the most innovative and easiest to use helium analyzer available on the market The He Check lite adopts an impressive solid state technology to detect gas thermal conductivity it is designed to achieve the best results on stability precision and accuracy of measurement Accuracy and resolution of measurement achieved by this new kind of sensor is simply not reachable using old and traditional portable instruments The inside electronic is based on state of art risc CPU and the control software is optimized for intuitive easy and flawless operations When powering up the instrument calibration is performed by an unique helium sensor zero function achieving the greatest accuracy ever seen in this grade of instrumentation Technical Specifications Helium measurement range from 0 1 to 99 9 Easy readable Alphanumeric LCD Display Analysis max Error 1 Auto calibration by air mix Powered by 9 Volts alkaline battery Battery power level showing on LCD display Empty battery power alarm showing on LCD display Self contained helium sensor Expected sensor life over 10 years Operational self diagnostic Measurement tube equipped with flow regulator set to 0 5 liters per minute and inflator hose quick connector e Limited warranty from material defects workmanship and materials of 24 months Connection Setup Insert
6. ry and change it with a new one putin place again the battery compartment closure power on He Check lite and make sure that the power level is over 7 9 volts by looking at displayed voltage WARNING There are no user serviceable parts inside the instrument Removing the four locking screws will void all warranties Do not leave batteries inside the instrument if you are planning to not use it for a long time period Warranty The He Check lite is covered by a limited warranty from material defects in workmanship and materials of 24 months To make a claim under this warranty the owner must have both completed and returned by mail or fax at the time of purchase the warranty registration card The owner must then return the damaged items to Underwater Technology along with a copy of the original purchase invoice or receipt No warranty service will be performed for other than registered owners For any question or problem write to clienti underwatertechnology com or send a fax to 39 06 45445708 14 NOTES Via Pinerolo 30 32 00182 Roma ITALY 06 45445708 www underwatertechnology com info underwatertechnology com
7. splayed in the following picture Helium 0 0 Bat 8 7V Connect the quick connector at the measurement tube end to the low pressure jacket inflator hose Wait for filling up of measurement chamber by the gas mixture to be analyzed The time required to fill both tubing and chamber is about 10 seconds On the He Check lite display read the helium percentage contained in gas mixture from 0 1 to 99 9 96 Helium 13 496 Bat 8 7V Detach the measurement tube quick connector from inflator hose You will see decreasing values displayed denoting emptying of measurement chamber You can proceed to next measurement even though display shows a value not equal to zero it just means that some traces of the previous mixture are still into measurement chamber The injection of a new gas mixture will eject the old one allowing a new measurement with no need for any further calibration or zeroing Measurement Chamber Air Flush At power up He Check lite perform an automatic zero function assuming that into measurement chamber there is 11 just air it is therefore necessary to be sure that at this time is indeed present a pure air mixture inside the chamber If you are unsure about the content of measurement chamber before powering up the instrument you must execute the washing of tubing and sensor compartment namely measurement chamber air flush Just in case you do not have a readily available source of
8. ware or to modify the gas flow tuning Do not leave He Check lite powered up for long time period if you are not performing any measurement An appreciable change in environmental pressure temperature or moisture may lead to a lowering of the measurement accuracy Always check for absence of moisture inside measurement tube WARNING Accurate reading of the helium content is dependent on a flow rate of 0 5 liters per minute Flows other than this one will result in an error in the calculated amount of helium The input pressure of the gas source should be 9 bars 20 You should always check for presence of moisture or oil vapor in the tank since presence of these contaminants in the sensor s enclosure are able to badly damage the helium sensor itself Analysis Operations Before powering on He Check lite you should make sure that power battery not supplied is in place and correctly connected Make sure that in sensor s chamber there is just air If you are unsure an air mix flush of the measurement chamber must be performed See chapter Measurement Chamber Air Flush for details about Power on the instrument and wait for the end of automatic zero function He Check Lite Analyzer by UT Firmaware Release 2 3a Calibration gt gt At the end of calibration procedure will be displayed the message Calibration OK and He Check lite wil be ready to the measurement operation as di
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