Bacharach H25-IR Operation & Maintenance Manual

Also see for H25-IR: Product catalog Specifications Instruction

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Bacharach H25-IR Operation & Maintenance Manual Manual pdf 23 page image

H25-IR Preparing for OperationInstruction 3015-5286 17SETPOINT – Both the bar graph and audible tone go to their maximum values when the leak rate equals orgoes above the setpoint. Enter a setpoint value per Section 2.5.5 Setpoint.H25C SETPOINT – This setting emulates the operation of the H25C Industrial Halogen Leak Detector. The bargraph and audible tone are suppressed when the leak rate is below the setpoint. They both go to their 50%values when the leak rate reaches the setpoint, and then they both continuously increase in value as the leakrate increases until reaching their maximum values at 2-times the setpoint. Enter a setpoint value perSection 2.5.5 Setpoint.Use the Up and Down buttons to highlight the desired function. Press ENT to save the selection.2.5.5 SetpointThe SETPOINT function establishes a leak rate at which the graphical display and audible tone are turned ONas determined by the Feedback Mode setting (refer to the previous section).The setpoint value also sets the leak rate at which one or more of the instrument’s relays is energizedwhenever the leak rate equals, exceeds, or falls below the setpoint value (refer to Section 2.4.3 Relays), plus itestablishes a reference point where the instrument’s auto-zero function can be turned OFF while in the Searchmode (refer to Section 2.5.6 Search Auto Zero).Use the Left and Right buttons to move the cursor across the screen to highlight the digit to be modified, andthen use the Up and Down buttons to modify that digit. Press ENT to save the new setpoint.2.5.6 Search Auto ZeroThe SEARCH AUTO ZERO function allows the operator to select one of the following conditions when the auto-zero function is disabled while in the Search mode.NOTE: This function works in conjunction with the setpoint value as entered in Section 2.5.5 Setpoint.ALWAYS ON – The background gas level is always zeroed. If the probe is held over a gas leak, the instrumentwill automatically zero-out the reading.ALWAYS OFF – The background gas level is never zeroed. If the probe is held over a gas leak, the instrumentwill not zero-out the reading, similar in operation to the Measure mode.BELOW SETPOINT – The auto-zero function is ON when the leak-rate is below the setpoint value. If the leakrate goes above the setpoint value, then the auto-zero function turns OFF, allowing the probe to stay on theleak without the reading being zeroed-out.For example: If the Setpoint is 2 Oz/yr, then the auto-zero function is ON for leaks rates that are <2 Oz/yr. Ifthe leak rate is 2 Oz/yr, then the auto-zero function turns OFF.BELOW 90% OF SP – The auto-zero function is ON when the leak-rate is below 90% of the setpoint value. Ifthe leak rate goes above 90% of the setpoint value, then the auto-zero function turns OFF, allowing the probeto stay on the leak without the reading being zeroed-out.For example: If the Setpoint is 2 Oz/yr, then the auto-zero function is ON for leaks rates that are <1.8 Oz/yr.If the leak rate is 1.8 Oz/yr, then the auto-zero function turns OFF.SETPOINTSETUP NO. 100.0000 Oz/yrSEARCH AUTO ZEROSETUP NO.1< ALWAYS ONALWAYS OFFBELOW SETPOINTBELOW 90% OF SPBELOW 75% OF SPBELOW 50% OF SP