Abstract: A method of operating a sensor system including at least one sensor for detecting an analyte gas and a control system includes electronically interrogating the sensor to determine the operational status thereof and upon determining that the operational status is non-conforming based upon one or more predetermined thresholds, the control system initiating an automated calibration of the sensor with the analyte gas or a simulant gas.

Abstract: A method of operating a gas sensor for a gas analyte including a sensing component includes, in a first mode, interrogating the sensor by periodically applying an electrical signal to the sensing component of the sensor, measuring sensor response to the electrical signal which is indicative of a sensitivity of the sensor each time the electrical signal is applied to the sensing component, determining whether one or more thresholds have been exceeded based upon the sensor response determined each time the electrical signal is applied to the sensing component, and entering a second mode, different from the first mode in analysis of the sensor response to the periodically applied electrical signals, if one or more thresholds are exceeded.

Abstract: A data processing equipment structure includes a plurality of vertical and horizontal frame components, which, together, define an equipment structure frame, and a plurality of panels disposed relative to the equipment structure frame to define a periphery. At least one of the plurality of vertical and horizontal frame components is an extruded strut having a generally uniform cross-section. The extruded strut includes an outwardly-facing channel extending along each of a pair of opposing sides of the extruded strut, at least one of which includes a set of evenly-spaced ridges, extending along each of two sides of the channel, for accommodating a threaded fastener. The extruded strut further includes one or more ledges, each having a depth sufficient to accommodate a thickness of one of the plurality of panels.

Abstract: A method of operating a sensor system including at least one sensor for detecting an analyte gas and a control system includes electronically interrogating the sensor to determine the operational status thereof and upon determining that the operational status is non-conforming based upon one or more predetermined thresholds, the control system initiating an automated calibration of the sensor with the analyte gas or a simulant gas.

Abstract: A data processing equipment structure includes a plurality of vertical and horizontal frame components, which, together, define an equipment structure frame, and a plurality of panels disposed relative to the equipment structure frame to define a periphery. At least one of the plurality of vertical and horizontal frame components is an extruded strut having a generally uniform cross-section. The extruded strut includes an outwardly-facing channel extending along each of a pair of opposing sides of the extruded strut, at least one of which includes a set of evenly-spaced ridges, extending along each of two sides of the channel, for accommodating a threaded fastener. The extruded strut further includes one or more ledges, each having a depth sufficient to accommodate a thickness of one of the plurality of panels.

Abstract: A modular thermal isolation barrier for use in sealing gaps in a data processing equipment structure includes an extruded edge seal and a panel. The extruded edge seal has a seal portion and a base portion with one or more channels. An edge of the panel is disposed within one of the one or more channels of the base portion of the edge seal such that the edge seal is seated against the edge of the panel with the seal portion in position to abut, and establish a seal with, an adjacent structure.

Abstract: An electrochemical gas sensor for detecting a target gas includes a housing comprising at least one gas inlet, an electrolyte within the housing, at least one working electrode in ionic contact with the electrolyte, at least one counter electrode in ionic contact with the electrolyte and at least one secondary electrode in ionic contact with the electrolyte. The secondary electrode is configured so that reaction of the target gas entering the housing via the at least one gas inlet at the at least one secondary electrode is less than reaction of the target gas at the least one working electrode. The electrochemical gas sensor further includes electronic circuitry in operative connection with the at least one working electrode, the at least one counter electrode and the at least one secondary electrode. The electronic circuitry is configured to measure an output from the at least one working electrode, and to measure an output from the at least one secondary electrode.

Abstract: The invention relates to cementitious or grout compositions and drilling fluids including reinforcement fibers and methods relating thereto. The cementitious or grout compositions include dry blend material and reinforcement fibers. Each of the fibers can have one or more of a pre-selected mean length, denier, diameter and aspect ratio to improve dispersion in dry blending the cementitious or grout compositions.

Abstract: A cage nut fastener, capable of installation against a frame member without the aid of tools, includes a spring cage and a nut retained within a space defined by the spring cage and prevented from rotation therein. The spring cage includes a back wall with a wall aperture therethrough, a cage arm extending in a forward direction from a side of the back wall, and a lever arm disposed at a side of the back wall that is opposite the cage arm. The nut includes a nut aperture therethrough that is generally aligned with the wall aperture of the back wall. The lever arm includes an extension portion that extends in a rearward direction behind the back wall of the spring cage.

Abstract: A surge protection device for an LED lighting system provides a failure detection circuit which shuts off an indicator lamp when upon failure of surge protection components. Surge suppression circuits are coupled between respective first and second, and second and third lines for receiving an AC mains input. The surge suppression circuits include a thermal cutoff device and a clamping device, with a fault detection circuit coupled between each respective series circuit. The fault detection circuit activates an indicator lamp when the surge protection device is in a normal operation mode. The fault detection circuit shuts off the indicator lamp when the surge protection device is in a short circuit fault mode, corresponding to failure of at least one component from a surge suppression circuit. Detection of an unlit indicator lamp may serve as a warning to an operator that the associated surge protection device should be replaced.

Abstract: A cable manager includes a backbone assembly and at least one side wall extending from the backbone assembly. The at least one side wall optionally includes one or more cable finger units. The backbone assembly includes a spine member having an extruded construction. The spine member includes one or more channels extending substantially an entire length thereof to facilitate easy attachment, removal and/or repositioning of a structure relative to the spine member. The cable manager optionally includes an accessory rod, a half-spool assembly, a cable finger accessory, a strap/buckle accessory, and/or a door assembly having an interference-free hinge set.

Abstract: The invention relates to modified reinforcement fibers for use in a variety of applications. The modification includes crimping linear or straight reinforcement fibers to create a deformed or different shaped reinforcement fiber. Examples of the shaped fibers resulting from crimping include w-shaped, s-shaped, z-shaped and wedge-shaped.

Abstract: A cable manager includes a backbone assembly and at least one side wall extending from the backbone assembly. The at least one side wall optionally includes one or more cable finger units. The backbone assembly includes a spine member having an extruded construction. The spine member includes one or more channels extending substantially an entire length thereof to facilitate easy attachment, removal and/or repositioning of a structure relative to the spine member. The cable manager optionally includes an accessory rod, a half-spool assembly, a cable finger accessory, a strap/buckle accessory, and/or a door assembly having an interference-free hinge set.

Abstract: A fuel cell module includes a plurality of fuel cell stacks; a manifold configured to provide process gases to and receive process gases from the plurality of fuel cell stacks; and a module housing enclosing the plurality of fuel cell stacks and the manifold. Each of the plurality of fuel cell stacks is individually installable onto the manifold by lowering the fuel cell stack onto the manifold, and is individually removable from the manifold by raising the fuel cell stack from the manifold.

Abstract: An LED driver is provided having a gate drive integrated circuit with an adaptive operating mode which operates between a first operating mode and a second operating mode. The gate drive integrated circuit is designed to primarily operate in the first operating mode which includes a predetermined minimum on-time and a predetermined maximum off-time for enabling and disabling gate drive signals to a switch, respectively. The second operating mode begins at the minimum on-time and the maximum off-time. The LED driver further includes a controller configured to monitor an on-time and an off-time of the gate drive signals. The controller is further configured responsive to the second operating mode to fix the on-time equal to the predetermined minimum on-time and to continually adjust the off-time greater than or equal to the maximum off-time.

Abstract: A steam vaporizer assembly includes an internal steam generator having a vessel configured to hold water, a vaporizer unit having a heating element configured to heat the water to generate saturated steam; and a controller configured to: cause the heating element to heat the water to a stand-by temperature; and while maintaining a water level of the water in the vessel between two control points: maintain the water in the vessel at the stand-by temperature until steam generation is required, and when steam generation is required, heating the water in the vessel from the stand-by temperature to a temperature at or above a vaporization temperature of the water using a heating element, to generate the steam.

Abstract: A method of operating a sensor to detect an analyte in an environment, wherein the sensor includes a working electrode and circuitry in operative connection with the working electrode, includes performing a sensor interrogation cycle including applying electrical energy to the working electrode to generate a non-faradaic current, measuring a response to the generation of the non-faradaic current to determine a state of the sensor, and actively controlling the circuitry to dissipate the non-faradaic current.

Abstract: A cage nut fastener, capable of installation against a frame member without the aid of tools, includes a spring cage and a nut retained within a space defined by the spring cage and prevented from rotation therein. The spring cage includes a back wall with a wall aperture therethrough, a cage arm extending in a forward direction from a side of the back wall, and a lever arm disposed at a side of the back wall that is opposite the cage arm. The nut includes a nut aperture therethrough that is generally aligned with the wall aperture of the back wall. The lever arm includes an extension portion that extends in a rearward direction behind the back wall of the spring cage.

Abstract: An air to air heat exchanger includes a first and a second cooling air flow passage extending over a core depth of the heat exchanger. A heated air flow passage is arranged between the cooling air flow passages, and extends over a first percentage of the core depth. Thermally conductive separators are arranged between the heated air flow passage and each of the cooling air flow passages. A first structurally reinforced section is provided between the separators, and extends from a cooling air inlet face in the core depth direction over a second percentage of the core depth. A second structurally reinforced section is provided between the separators, and extends from a cooling air outlet face in the core depth direction over a third percentage of the core depth. The sum of the first, second, and third percentages is greater than 100 percent.

Abstract: The invention relates to modified reinforcement fibers for use in a variety of applications. The modification includes crimping linear or straight reinforcement fibers to create a deformed or different shaped reinforcement fiber. Examples of the shaped fibers resulting from crimping include w-shaped, s-shaped, z-shaped and wedge-shaped.