Bacharach H25-IR manual Part Replacement, Removing the Top Cover

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Maintenance	H25-IR

5.4 Part Replacement

WARNING! Shock Hazard. Before performing any service work, remove the AC power cord to prevent electrical shock.

Part replacement is limited to replacing filters, O-rings, and fuses. It is recommended that all other parts be replaced by an authorized Bacharach Service Center (refer to Section 6.2 Service Centers).

5.4.1 Removing the Top Cover

When servicing the parts inside the instrument, the instrument’s top cover is removed as follows:

Items Required:

•Medium Phillips head screwdriver

Procedure:

1.Remove both the front and rear bezels by first disengaging the plastic tabs on the right and left sides of the bezel, and then pulling the bezel straight out.

2.Remove the two top screws that secure the front panel.

3.Remove the four screws that secure the rear panel.

4.Remove the Relay, RS-485, and 4–20mA connectors from the rear panel. DO NOT remove any connector on the interior side of the rear panel.

5.Drop down the rear panel far enough to allow the top cover to clear, being careful not to stress the cables attached to the inside of the panel.

6.Remove top cover by sliding it toward rear of instrument.

46	Instruction 3015-4342

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Contents H25-IR Infrared Refrigerant Gas Leak DetectorWarranty Register Your Warranty by VisitingTable of Contents Parts and Service AC Power and Grounding Safety PrecautionsHazard Symbols IntroductionWorking Inside the Instrument CleaningExplosive Atmosphere Misuse and Modifications to Instrument Case of MalfunctionOrdering Information Unpacking and Initial ChecksFeatures and Capabilities Functional Overview Leak Rate = Flow Rate x Gas ConcentrationNames and Functions of Components Front ViewRear View Interior Standard Probe Standard Probe with LED and Programmable PushbuttonSmart Probe Smart Probe Keylock Function Menu System System MenuPreparing for Operation Connecting the ProbeConnecting the AC Power Cord Turning on the InstrumentGas Type System SetupMain Menu System Setup Menu Leak UnitsRelays 4 4-20 mA LoopBrightness Pchk ModeReset Defaults ClockRange Configuring the Setups FunctionSetup Name Feedback Mode SetpointCalibration Search Auto ZeroTypical Relay 1 Wiring External Relay ConnectionsMA Current Loop Connector 4-40 mA Current Loop ConnectionPreparing for Operation H25-IR Internal Calibration Selection CalibrationSelecting Internal or External Calibration Calibration Data MenuExternal Calibration Selection and Setup CAL Internal CalibrationExternal Calibration Material Required ProcedureCAL Factor Improving PPM Measurement Accuracy using the CAL Factor Adjusting the CAL Factor Restoring Factory CalibrationCalibration H25-IR Initial Setup Using the H25-IRPower OperationSetup Selection Range SelectionVolume Adjustment Searching for a LeakMeasuring the Leak Rate Measuring the PPM LevelLog Menu Logging Measured ReadingsWorking with Logged Measurements Clearing the Log Diagnostics Menu What to Do when a Fault OccursWhat is PCHK? RS-232 CommunicationOperation H25-IR Sensor Data MaintenanceDiagnostics Menu Last Fault Pressure Factory MenuIR Emitter Factory Factory MenuLeak Gas Auto GainLeak Rate Leak TempLeak Tempco Sensor CalFirmware Model SelectProbe Type Flashing Memory Items RequiredSelect Setup Communications Select File Load Flash Image Part Replacement Removing the Top CoverFuse Replacement Probe Tip Filter & O-Ring ReplacementInternal Filter Replacement Parts and Service Replacement PartsService Centers United StatesSpecifications CFCs, HCFCs, HFCs and HalogensSpecifications H25-IR Appendix a Factory Defaults ContinuousAppendix a H25-IR H25-IR Appendix a Headquarters Hunt Valley Circle, New Kensington, PA