# Patent

## Title
Method and system for filling a gas cylinder

## Abstract

A charge station is provided for filling a gas cylinder with gas. The charge station includes a gas output port configured to be fluidly connected to a supply of gas. The gas output port is configured to be fluidly connected to the gas cylinder for filling the gas cylinder with gas from the supply of gas. The charge station also includes a control system operatively connected to the gas output such that the control system is configured to control filling of the gas cylinder, and a radio frequency identification (RFID) reader operatively connected to the control system, the RFID reader configured to read data from an RFID tag on the gas cylinder.

## Background
CROSS REFERENCE TO RELATED APPLICATIONS
This application is a continuation of U.S. patent application Ser. No. 14/097,343 filed Dec. 5, 2013, which is a divisional of U.S. patent application Ser. No. 12/558,293 filed Sep. 11, 2009, which claims the benefit of U.S. Provisional Patent Application No. 61/097,091, filed Sep. 15, 2008, each of which is incorporated by reference in its entirety.


BACKGROUND OF THE INVENTION
The subject matter described and/or illustrated herein relates generally to filling gas cylinders with gas, and more particularly, to a method and system for filling a gas cylinder.
Various conditions may be met to properly and safely fill gas cylinders with gas. For example, various cylinder fill pressures exist for gas cylinders. If a gas cylinder is filled with the wrong pressure, the cylinder will not be completely filled or an overpressure will result, which may rupture an overpressure disc of the cylinder. Gas cylinders may also need to be periodically hydrostatically tested to ensure safe filling. Moreover, each gas cylinder has a specific service life based on the type of cylinder. Expired gas cylinders must be removed from service when the service life has expired. Moreover, if the hydrostatic test date or service life of a gas cylinder has expired, the cylinder should not be refilled.
At least some known gas cylinder filling systems use a manual process whereby a trained operator inspects each gas cylinder prior to filling to obtain the necessary information for properly and safely filling the cylinder. For example, at least some known processes for filling gas cylinders with gas require a visual inspection of the cylinder by a trained operator before the cylinder is filled. Operators may therefore need to be trained to properly inspect gas cylinders. For example, operators may need to be trained to determine the operating pressure of each cylinder and to manually set the filling system to the determined fill pressure. If the operator fails to set the fill pressure to the proper value, the cylinder may be insufficiently filled or the overpressure disc in the cylinder may rupture. Operators may also need to be trained to examine a manufactured date, an expiration date, and/or a hydrostatic test date on each gas cylinder to determine whether the cylinder should be in service before filling. For example, if the cylinder hydrostatic test date or service life has expired and is not observed by the operator, there is an increased risk of the cylinder failing during filling or operation. Moreover, maintenance and record keeping of cylinders may be required to ensure that cylinders are hydrostatically tested when required and/or have been taken out of service once service life has expired.
There is a need for a gas cylinder filling system that may be operated by an operator having less training as compared to at least some known gas cylinder filling systems. There is a need for a gas cylinder filling system that may reduce a number of operator errors as compared to at least some known gas cylinder filling systems.
BRIEF DESCRIPTION OF THE INVENTION
In one embodiment, a charge station is provided for filling a gas cylinder with gas. The charge station includes a gas output port configured to be fluidly connected to a supply of gas. The gas output port is configured to be fluidly connected to the gas cylinder for filling the gas cylinder with gas from the supply of gas. The charge station also includes a control system operatively connected to the gas output such that the control system is configured to control filling of the gas cylinder, and a radio frequency identification (RFID) reader operatively connected to the control system, the RFID reader configured to read data from an RFID tag on the gas cylinder.
In another embodiment, a gas cylinder filling system is provided for filling a gas cylinder with gas. The gas cylinder filling system includes a supply of gas and a charge station. The charge station includes a gas output port fluidly connected to the supply of gas. The gas output port is configured to be fluidly connected to the gas cylinder for filling the gas cylinder with gas from the supply of gas. The charge station also includes a control system operatively connected to the gas output such that the control system is configured to control filling of the gas cylinder, and a radio frequency identification (RFID) reader operatively connected to the control system, the RFID reader configured to read data from an RFID tag on the gas cylinder.
In another embodiment, a method is provided for filling a gas cylinder with gas using a charge station. The method includes reading data from a radio frequency identification (RFID) tag on the gas cylinder, and filling the gas cylinder with gas based at least in part on data read from the RFID tag on the gas cylinder.



BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a block diagram of an exemplary embodiment of a gas cylinder filling system.
FIG. 2 is a perspective view of the gas cylinder filling system shown in FIG. 1.
FIG. 3 is a perspective view of an exemplary alternative embodiment of a gas cylinder filling system.
FIG. 4 is a flowchart illustrating an exemplary embodiment of a method for filling a cylinder with gas using the gas cylinder filling system shown in FIGS. 1 and 2.



DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a block diagram of an exemplary embodiment of a gas cylinder filling system 10. FIG. 2 is a perspective view of the gas cylinder filling system 10. The gas cylinder filling system 10 includes a charge station 12 and a supply of gas 14. As will be described below, the charge station 12 is configured to fill a gas cylinder 16 with a gas. The gas may be any gas, such as, but not limited to, a breathing gas (such as, but not limited to, air, oxygen, nitrox, tirmix, heliox, heliair, hydreliox, hydrox, neox, and/or the like) and/or the like. The gas cylinder 16 may be any type of gas cylinder, such as, but not limited to, a gas cylinder for a self-contained breathing apparatus (SCBA), a space suit, medical equipment, a self-contained underwater breathing apparatus (SCUBA), and/or the like. Although shown as generally cylindrical in shape, in addition or alternatively to the cylindrical shape, the gas cylinder 16 may include any other shape(s).
The charge station 12 includes a housing 18, a data collection system 20, one or more radio frequency identification (RFID) readers 22, one or more RFID readers 24, one or more gas output ports 26, and a control system 28. The housing 18 includes one or more cylinder docks 19 that receive the gas cylinder 16. Each gas output port 26 extends adjacent a corresponding one of the cylinder docks 19 and is fluidly connected to the supply of gas 14, for example via one or more hoses 30. Each gas output port 26 is configured to be fluidly connected to an input port 32 of the gas cylinder 16 for filling the gas cylinder 16 with gas from the supply 14. Specifically, when a gas cylinder 16 is desired to be filled, the gas cylinder 16 is mounted on the cylinder dock 19 and the input port 32 of the gas cylinder 16 is fluidly connected to the gas output port 26. Although two gas output ports 26 and two cylinder docks 19 are shown, the charge station 12 may include any number of gas output ports 26 and any number of cylinder docks 19, for example for simultaneously filling any number of gas cylinders 16.
In the exemplary embodiment, the supply of gas 14 is not a component of the charge station 12. For example, in the exemplary embodiment the supply of gas 14 is not held by the housing 18 of the charge station 12. Alternatively, the supply of gas 14 is a component of the charge station 12. For example, FIG. 3 is a perspective view of an exemplary alternative embodiment of a gas cylinder filling system 110. The gas cylinder filling system 110 includes a charge station 112 and a supply of gas 114. The charge station 112 includes a housing 118, a data collection system 120, one or more radio frequency identification (RFID) readers 122, one or more RFID readers 124, one or more cylinder docks 119, one or more gas output ports 126, and a control system 128. The supply of gas 114 is a component of the charge station 112. For example, in the exemplary embodiment the supply of gas 114 is held within an internal compartment 115 of the charge station housing 118. Each gas output port 126 is fluidly connected to the supply of gas 114. Each gas output port 126 is configured to be fluidly connected to an input port 132 of a gas cylinder 116 for filling the gas cylinder 116 with gas from the supply 114.
Referring again to FIGS. 1 and 2, the control system 28 controls filling of the gas cylinder 16 with gas from the supply 14. In the exemplary embodiment, the control system 28 includes a control panel 34, an optional processor 36, and an optional memory 38. The processor 36 may automatically control some or all portions of the filling process, such as, but not limited to, activating the filling process, deactivating the filling process, selecting parameters of the filling process (such as, but not limited to, selecting a pressure to fill the gas cylinder 16 with and/or the like), and/or the like. The control system 28 includes an activation input 43 that enables an operator to manually start filling the gas cylinder 16 with gas. In the exemplary embodiment, the activation input 43 is remote from the control panel 34. Alternatively, the control panel 34 includes the activation input 43. The control panel 34 optionally includes inputs 40 that enable an operator to manually control some or all of the filling process, such as, but not limited to, activating the filling process, deactivating the filling process, selecting parameters of the filling process (such as, but not limited to, selecting a pressure to fill the gas cylinder 16 with and/or the like), and/or the like. In the exemplary embodiment, the control panel 34 includes a fill pressure input 41 and an emergency stop input 42. The fill pressure input 41 enables an operator to manually select the pressure to fill the gas cylinder 16 with from a range of fill pressures. The emergency stop input 42 enables an operator to stop filling the gas cylinder 16 with gas. The control panel 34 optionally includes a display 44 for displaying, such as, but not limited to, warnings, indications, parameters of the filling process, and/or the like.
The RFID readers 22 and 24 are each configured to read data from one or more RFID tags 46 on the gas cylinder 16. The RFID reader 22 is a hand-held RFID reader. The RFID reader 24 is fixedly mounted on the housing 18 of the charge station 12. In the exemplary embodiment, the RFID readers 22 and 24 are each operatively connected to the data collection system 20 using a respective electrical cable 48 and 50 (the electrical cable 50 is not visible in FIG. 2). However, the RFID readers 22 and 24 may each be connected to the data collection system 20 using any suitable means, such as, but not limited to, using a wireless transmitter (not shown).
The data collection system 20 is operatively connected to the control system 28 for automatically controlling some or all portions of the filling process, such as, but not limited to, activating the filling process, deactivating the filling process, selecting parameters of the filling process (such as, but not limited to, selecting a pressure to fill the gas cylinder 16 with and/or the like), and/or the like. The data collection system 20 optionally includes one or more memories 52 configured to store data, such as, but not limited to, data read from the RFID tag 46 by the RFID reader 22 and/or 24, data related to the gas cylinder 16, data related to the gas cylinder filling system 10 (including data related to the charge station 12), and/or the like. The data read from the RFID tag 46 by the RFID reader 22 and/or 24, the data related to the gas cylinder 16, and the data related to the gas cylinder filling system 10 (including data related to the charge station 12) may include, but is not limited to, a serial number of the gas cylinder 16, an operating pressure of the gas cylinder 16, a hydrostatic test date of the gas cylinder 16, a manufactured date of the gas cylinder 16, a type of the gas cylinder 16, an end of life date of the gas cylinder 16, an early warning of upcoming cylinder obsolescence of the gas cylinder 16, an upcoming hydrostatic test requirement of the gas cylinder 16, frequency of usage of the gas cylinder 16, a utilization of the gas cylinder 16, justification for additional equipment related to the gas cylinder 16, the charge station 12, and/or the system 10, a location of the gas cylinder 16, a filling date of the gas cylinder 16, an identification of the system 10, a location of the system 10, a current date, a current time, ambient air sample data, and an identification of an operator.
The data collection system 20 optionally includes one or more processors 54 operatively connected to the memory 52, the RFID readers 22 and/or 24, and/or any component of the control system 28. The processor 54 may receive data from the memory 52, the memory 38, another component of the control system 28, and/or from the RFID readers 22 and/or 24. The data received from the memory 52, the memory 38, another component of the control system 28, and/or the RFID readers 22 and/or 24 may include, but is not limited to, data read from the RFID tag 46 by the RFID readers 22 and/or 24, data related to the gas cylinder 16, data related to the gas cylinder filling system 10 (including data relating to the charge station 12), and/or the like. The processor 54 may make various decisions and/or may take various actions based on the data received from the memory 52 the memory 38, another component of the control system 28, and/or the RFID readers 22 and/or 24. For example, the processor 54 may automatically control some or all portions of the filling process, such as, but not limited to, activating the filling process, deactivating the filling process, selecting parameters of the filling process (such as, but not limited to, selecting a pressure to fill the gas cylinder 16 with and/or the like), and/or the like. Exemplary decisions and/or actions of the processor 54 are described below with respect to FIG. 4. The processor 54 is not limited to the decisions and/or actions illustrated in FIG. 4 and described with respect thereto.
The processor 54 may transmit data to an optional storage system 56 that is not a component of the charge station 12. For example, the processor 54 may transmit data to a memory 58 of the storage system 56. The processor 54 may transmit data read from the RFID tag 46 by the RFID readers 22 and/or 24, data related to the gas cylinder 16, data related to the gas cylinder filling system 10 (including data related to the charge station 12), and/or the like. The processor 54 may transmit the data using any suitable means, such as, but not limited to, using an optional wireless data transmitter 60 of the data collection system 20 and/or using an optional cable 62 of the data collection system 20. The processor 54 may write data to the memory 52, the memory 38, the memory 58, and/or the RFID tag 46. The processor 54 may write data read from the RFID tag 46 by the RFID readers 22 and/or 24, data related to the gas cylinder 16, data related to the gas cylinder filling system 10 (including data related to the charge station 12), and/or the like. Moreover, the RFID readers 22 and/or 24 may each write data to the memory 52, the memory 38, the memory 58, and/or the RFID tag 46. The RFID readers 22 and/or 24 may each write data read from the RFID tag 46 by the RFID readers 22 and/or 24, data related to the gas cylinder 16, data related to the gas cylinder filling system 10 (including data related to the charge station 12), and/or the like.
FIG. 4 is a flowchart illustrating an exemplary embodiment of a method 200 for filling the gas cylinder 16 (FIGS. 1 and 2) with gas using the gas cylinder filling system 10 (FIGS. 1 and 2). The method 200 may include, but is not limited to including, the following steps. Steps of the method 200 described and/or illustrated herein may also be omitted from the method 200. An empty or partially filled gas cylinder 16 is loaded 202 into a cylinder dock 19 (FIGS. 1 and 2) of the charge station 12 (FIGS. 1 and 2). Loading 202 the gas cylinder 16 into the cylinder dock 19 may include orienting the RFID tag 46 (FIGS. 1 and 2). Data is read 204 from the RFID tag 46 using the RFID reader 22 (FIGS. 1 and 2) and/or the RFID reader 24 (FIGS. 1 and 2). The data read 204 from the RFID readers 22 and/or 24 is received 206 by the data collection system 20. The processor 54 determines 208 if an end of life date of the gas cylinder 16 has expired. If the end of life date of the gas cylinder 16 has expired, at step 210 the processor 54 displays (on the display 44 or a display, not shown, of the system 20) a warning that the end of life date has expired, displays a warning that the gas cylinder 16 should not be filled by the charge station 12, displays a warning that the gas cylinder 16 should be removed from service, prevents the gas cylinder 16 from being filled with gas by the charge station 12, and/or the like.
If the end of life date of the gas cylinder 16 has not expired, at step 212 the processor 54 determines whether a hydrostatic test date of the gas cylinder 16 has expired. If the hydrostatic test date of the gas cylinder 16 has expired, at step 214 the processor 54 displays a warning that the cylinder hydrostatic test date has expired, displays a warning that the gas cylinder 16 should not be filled by the charge station 12, displays a warning that the gas cylinder 16 should be removed from service, prevents the gas cylinder 16 from being filled with gas by the charge station 12, and/or the like.
If the hydrostatic test date of the gas cylinder 16 has not expired, at step 216 the processor 54 determines if an operating pressure of the gas cylinder 16 equals a fill pressure setting of the charge station 12. If the operating pressure of the gas cylinder 16 does not equal the fill pressure setting of the charge station 12, at step 218 the processor 54 may display a warning that the operating pressure of the gas cylinder 16 does not equal the fill pressure setting of the charge station 12, may display a warning that the gas cylinder 16 should not be filled by the charge station 12, may prevent the gas cylinder 16 from being filled with gas by the charge station 12, may display an indication that the fill pressure setting of the charge station 12 should be changed, and/or the like. An operator may then manually change 220 the fill pressure setting of the charge station 12 to equal the operating pressure of the gas cylinder 16. In addition or alternative to the any portion(s) of the steps 218 and 220, if the operating pressure of the cylinder 14 does not equal the fill pressure setting of the charge station 12, the processor 54 may automatically change 222 the fill pressure setting of the charge station 12 to equal the operating pressure of the gas cylinder 16.
When the operating pressure of the gas cylinder 16 equals the fill pressure setting of the charge station 12, the processor 54 may display 224 an indication that an operator can manually activate the charge station 12 to fill the gas cylinder 16 with gas. In alternative to manual activation of the charge station 12, the processor 54 may automatically activate 226 the charge station 12 to fill the gas cylinder 16 with gas.
At step 228, the processor 54 and/or the RFID readers 22 and/or 24 may write to the memory 52 (FIGS. 1 and 2), the memory 38 (FIGS. 1 and 2), the memory 58 (FIGS. 1 and 2), and/or to the RFID tag 46: data read from the RFID tag 46 by the RFID readers 22 and/or 24, data related to the gas cylinder 16; data related to the gas cylinder filling system 10 (including data related to the charge station 12), and/or the like. At step 230, the processor 54 may transmit to the storage system 56 (FIGS. 1 and 2): data read from the RFID tag 46 by the RFID readers 22 and/or 14, data related to the gas cylinder 16, data related to the gas cylinder filling system 10 (including data related to the charge station 12), and/or the like.
After filling the gas cylinder 16, the data read from the RFID tag 46 by the RFID readers 22 and/or 24, the data related to the gas cylinder 16, the data related to the gas cylinder filling system 10 (including data related to the charge station 12), and/or the like can be used to track and/or manage a plurality of gas cylinders. Uses of data may include, but are not limited to: early warning of upcoming cylinder obsolescence, upcoming hydrostatic test requirements, frequency of usage, equipment utilization, justification for additional equipment, tracking of cylinder locations, manage other fire department assets (such as, but not limited to, thermal imaging cameras, SCBA components, regulators, masks, pressure reducers, and/or the like), and/or the like.
The embodiments described and/or illustrated herein may provide a gas cylinder filling system that may be operated by an operator having less training as compared to at least some known gas cylinder filling systems. The embodiments described and/or illustrated herein provide a gas cylinder filling system that may reduce a number of operator errors as compared to at least some known gas cylinder filling systems.
In some embodiments, the data collection system 20 may be a component of the control system 28. Moreover, any functions, method steps, decisions, actions, and/or the like of the processor 54 and the data collection system 20 may be additionally or alternatively performed by the control system 20.
The subject matter described and/or illustrated herein includes a gas cylinder filling system that utilizes an RFID tag and reader to supply data from a gas cylinder to a data collection system and/or a control system for use filling gas cylinders with gas.
Exemplary embodiments are described and/or illustrated herein in detail. The embodiments are not limited to the specific embodiments described herein, but rather, components and/or steps of each embodiment may be utilized independently and separately from other components and/or steps described herein. Each component, and/or each step of one embodiment, can also be used in combination with other components and/or steps of other embodiments. When introducing elements/components/etc. described and/or illustrated herein, the articles “a”, “an”, “the”, “said”, and “at least one” are intended to mean that there are one or more of the element(s)/component(s)/etc. The terms “comprising”, “including” and “having” are intended to be inclusive and mean that there may be additional element(s)/component(s)/etc. other than the listed element(s)/component(s)/etc. Moreover, the terms “first,” “second,” and “third,” etc. in the claims are used merely as labels, and are not intended to impose numerical requirements on their objects. Dimensions, types of materials, orientations of the various components, and the number and positions of the various components described and/or illustrated herein are intended to define parameters of certain embodiments, and are by no means limiting and are merely exemplary embodiments. Many other embodiments and modifications within the spirit and scope of the claims will be apparent to those of skill in the art upon reviewing the description and illustrations. The scope of the subject matter described and/or illustrated herein should therefore be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. Further, the limitations of the following claims are not written in means-plus-function format and are not intended to be interpreted based on 35 U.S.C. §112, sixth paragraph, unless and until such claim limitations expressly use the phrase “means for” followed by a statement of function void of further structure.
While the subject matter described and/or illustrated herein has been described and/or illustrated in terms of various specific embodiments, those skilled in the art will recognize that the subject matter described and/or illustrated herein can be practiced with modification within the spirit and scope of the claims.

## Claims

1. A charge station for filling a gas cylinder with gas, said charge station comprising:
a gas output port configured to be fluidly connected to a supply of gas, the gas output port configured to be fluidly connected to the gas cylinder for filling the gas cylinder with gas from the supply of gas;
a control system operatively connected to the gas output such that the control system is configured to control filling of the gas cylinder; and
a radio frequency identification (RFID) reader operatively connected to the control system, the RFID reader configured to read data from an RFID tag on the gas cylinder including a hydrostatic test date of the gas cylinder, an end of life date of the gas cylinder and an operating pressure of the gas cylinder, wherein:
the control system includes a processor and a memory configured to cause the control system to enable a flow of gas from the output port to the gas cylinder for filling the gas cylinder based on data consisting of data read from the RFID tag and from data stored in the memory of the control system, the control system further configured to, prior to enabling the flow of gas for filling the gas cylinder, use the data read from the RFID tag to determine whether or not at least one condition of the following conditions is satisfied:
(a) end of life date of the first gas cylinder has expired,
(b) the hydrostatic test date of the first gas cylinder has expired, or
(c) the operating pressure of the first gas cylinder is not equal to the fill pressure setting of the charge station, and
display a warning and/or prevent the gas cylinder being filled based upon the following sequence:
upon a determination that a first one of said conditions (a), (b) or (c) is met, and
if the first one of said conditions (a), (b) or (c) is not met, upon a determination that a second one of said conditions (a), (b) or (c) is met, and
if the first and the second one of said conditions (a), (b) or (c) are not met, upon a determination that a third one of said conditions (a), (b) or (c) is met.

2. The charge station according to claim 1, further comprising a data collection system operatively connected to the RFID reader to receive data read from the RFID tag on the gas cylinder, the data collection system being operatively connected to the control system such that the data collection system is configured to at least one of send data read from the RFID tag to the control system and control filling of the gas cylinder based at least in part on data received from the RFID reader.

3. The charge station according to claim 1, further comprising a data collection system operatively connected to the RFID reader to receive data read from the RFID tag on the gas cylinder, wherein at least one of the data collection system and the control system is configured to store at least one of data read from the RFID tag by the RFID reader, data related to the gas cylinder, and data related to the charge station.

4. The charge station according to claim 1, wherein the RFID reader is configured to read from the RFID tag at least one of a serial number of the gas cylinder, a manufactured date of the gas cylinder, a type of the gas cylinder, an early warning of upcoming cylinder obsolescence of the gas cylinder, an upcoming hydrostatic test requirement of the gas cylinder, frequency of usage of the gas cylinder, a utilization of the gas cylinder, justification for additional equipment related to at least one of the gas cylinder and the charge station, a location of the gas cylinder, a filling date of the gas cylinder, an identification of the charge station, a location of the charge station, a current date, a current time, ambient air sample data, and an identification of an operator.

5. The charge station according to claim 1, wherein at least one of the following is true:
the RFID reader comprises a hand-held RFID reader; or
the RFID reader is fixedly mounted on the charge station.

6. The charge station according to claim 1, wherein the charge station comprises the supply of gas.

7. The charge station according to claim 1, wherein the charge station includes at least two cylinder docks, each dock configured to accommodate a single gas cylinder.

8. The charge station according to claim 7, wherein the processor and the memory cause the control system to:
read data from an additional RFID tag on an additional gas cylinder, said data including at least one of a hydrostatic test date of the additional gas cylinder, an end of life date of the additional gas cylinder and an operating pressure of the additional gas cylinder,
enable a flow of gas to the additional gas cylinder based on data consisting of data read from the additional RFID tag and from data stored in the memory of the control system, and
determine whether or not at least one condition of the end of life date of the additional gas cylinder has expired, the hydrostatic test date of the additional gas cylinder has expired of the operating pressure of the additional gas cylinder is not equal to the fill pressure setting of the charge station, and upon a determination that at least one of said conditions is met, display a warning and/or prevent the additional gas cylinder being filled.

9. A method for filling one or more gas cylinders with gas using a charge station, said method comprising:
loading a first gas cylinder into a first cylinder dock of the charge station, the first gas cylinder including a first radio frequency identification (RFID) tag, the first RFID tag having stored thereon at least a hydrostatic test date of the first gas cylinder, an end of life date of the first gas cylinder and an operating pressure of the first gas cylinder;
reading data from the first RFID tag, said data including the hydrostatic test date of the first gas cylinder, an end of life date of the first gas cylinder and an operating pressure of the first gas cylinder; and
filling the first gas cylinder with gas based on data consisting of data read from the first RFID tag and from data stored in a memory of the charge station, said method comprising:
prior to filling the first gas cylinder, using the data read from the first RFID tag to determine whether or not at least one condition of the following conditions is satisfied:
(a) end of life date of the first gas cylinder has expired,
(b) the hydrostatic test date of the first gas cylinder has expired, or
(c) the operating pressure of the first gas cylinder is not equal to the fill pressure setting of the charge station, and
displaying a warning and/or preventing the first gas cylinder being filled based upon the following sequence:
upon a determination that a first one of said conditions (a), (b) or (c) is met, and if the first one of said conditions (a), (b) or (c) is not met, upon a determination that a second one of said conditions (a), (b) or (c) is met, and if the first and the second one of said conditions (a), (b) or (c) are not met, upon a determination that a third one of said conditions (a), (b) or (c) is met.

10. The method according to claim 9, wherein filling the first gas cylinder with gas comprises automatically filling the first gas cylinder using a processor.

11. The method according to claim 9, further comprising storing at least one of data read from the first RFID tag by the RFID reader, data related to the first gas cylinder, and data related to the charge station.

12. The method according to claim 9, wherein reading data from the first RFID tag comprises reading at least one of a serial number of the first gas cylinder, a manufactured date of the first gas cylinder, a type of the first gas cylinder, an early warning of upcoming cylinder obsolescence of the first gas cylinder, an upcoming hydrostatic test requirement of the first gas cylinder, frequency of usage of the first gas cylinder, a utilization of the first gas cylinder, justification for additional equipment related to at least one of the first gas cylinder and the filling system, a location of the first gas cylinder, a filling date of the first gas cylinder, an identification of the charge station, a location of the charge station, a current date, a current time, ambient air sample data, and an identification of an operator.

13. The method according to claim 9, wherein upon determining that the end of life date of the first gas cylinder has expired, the method further comprises using a processor of the charge station to automatically perform at least one of the following: display a warning that the first gas cylinder end of life date has expired, display a warning that the first gas cylinder should not be filled by the charge station, display a warning that the first gas cylinder should be removed from service, or prevent the first gas cylinder from being filled with gas by the charge station.

14. The method according to claim 9, wherein upon determining that the hydrostatic test date of the first gas cylinder has expired, the method further comprises using a processor of the charge station to automatically perform at least one of the following: display a warning that the first gas cylinder hydrostatic test date has expired, display a warning that the first gas cylinder should not be filled by the charge station, display a warning that the first gas cylinder should be removed from service, or prevent the first gas cylinder from being filled with gas by the charge station.

15. The method according to claim 9, further comprising:
upon determining that the operating pressure of the first gas cylinder does not equal the fill pressure setting of the charge station, using a processor of the charge station to automatically perform at least one of the following: display a warning that the operating pressure of the first gas cylinder does not equal the fill pressure setting of the charge station, display a warning that the first gas cylinder should not be filled by the charge station, prevent the first gas cylinder from being filled with gas by the charge station, display an indication that the fill pressure setting of the charge station should be changed, or change the fill pressure setting of the charge station to equal the operating pressure of the first gas cylinder.

16. The method according to claim 9, wherein the memory of the charge station is a component of a data collection system of the charge station and wherein said method comprises: subsequent to reading the data from the first RFID tag, transmitting the data to the data collection system using a wireless transmitter.

17. The method according to claim 9, wherein upon a determination that the operating pressure of the first cylinder does not equal the fill pressure setting of the charge station, automatically changing the fill pressure setting of the charge station to be equal to the operating pressure of the first gas cylinder.

18. The method according to claim 9, wherein the gas is one of air, oxygen, nitrox, tirmix, heliox, heliair, hydreliox, hydrox or neox.

19. The method according to claim 9, wherein the charge station includes at least one RFID reader that is fixedly mounted on a housing of the charge station, and wherein loading the first gas cylinder into the first cylinder dock comprises orienting the first RFID tag prior to reading of the data from the first RFID tag.

20. The method according to claim 9, wherein reading data from the first RFID tag comprises reading data from the first RFID tag using a handheld RFID reader.

21. The method according to claim 9, wherein the first gas cylinder includes more than one RFID tags, and wherein said method comprises reading data from one or more RFID tags of the first gas cylinder.

22. The method according to claim 9, further comprising:
loading a second gas cylinder into a second cylinder dock of the charge station, the second gas cylinder including a second radio frequency identification (RFID) tag, the second RFID tag having stored thereon at least a hydrostatic test date of the second gas cylinder, an end of life date of the second gas cylinder and an operating pressure of the second gas cylinder;
reading data from the second RFID tag, said data including the hydrostatic test date of the second gas cylinder, an end of life date of the second gas cylinder and an operating pressure of the second gas cylinder; and
filling the second gas cylinder with gas based on data consisting of data read from the second RFID tag and from data stored in a memory of the charge station, said method comprising:
prior to filling the second gas cylinder, using the data read from the RFID tag, using a processor of the charge station to determine whether or not at least one condition of the following conditions is satisfied:
(a) end of life date of the second gas cylinder has expired,
(b) the hydrostatic test date of the second gas cylinder has expired, or
(c) the operating pressure of the second gas cylinder is not equal to the fill pressure setting of the charge station, and
upon a determination that at least one of said conditions (a), (b) or (c) is met, displaying a warning and/or preventing the second gas cylinder being filled.