Bacharach H25-IR manual Volume Adjustment, Searching for a Leak

Page 35

H25-IR

Operation

 

 

4.2.5 Volume Adjustment

A speaker at the rear of the instrument produces an audible tone whose frequency increases as the detected level of gas increases. An earphone when plugged into the instrument’s earphone jack automatically disconnects the speaker, allowing the operator to listen to the unit’s audible tone in high-noise environments.

TIP: If additional volume is required, connect an amplified speaker to the earphone jack.

Adjust the speaker and earphone volume as follows:

1. Press the VOL (volume) button to display the ADJUST SPEAKER VOLUME screen.

 

Oz/yr

 

ADJUST SPEAKER

R134A

Speaker Volume Bar Graph

VOLUME

SETUP

------

SM SRCH

 

2.Press the Up button to increase volume, and press the Down button to decrease volume. Pressing the Left button sets the volume to minimum, while pressing the Right button sets it to maximum. A visual indication of the volume level is provided by a bar graph at the bottom of the Data Display screen.

3.Press ENT to save the new volume level.

4.2.6 Searching for a Leak

Use the following procedure to locate a leak.

1.Press the MODE button to display “SRCH” at the bottom of the Data Display screen or on the Smart probe.

The Search Mode is used to locate leaks because of its ability to auto-zero or block out background contamination. This greatly reduces and/or eliminates false positives while retaining the sensitivity to quickly locate small to large leaks.

TIP: The auto-zero function can be turned OFF, or configured to automatically turn OFF at a user- defined leak rate. Refer to Section “2.5.6 Search Auto Zero”.

2.Begin leak testing by moving the probe tip slowly toward the area being tested. Pinpointing leaks requires continuous probe movement. (2 inches [50 mm] per second is recommended as specified in SAE J1627 and J1628.) When the gas being monitored is detected the instrument responds in a positive manner as follows:

•The gas reading increases

•The bar graph at the bottom of the Data Display screen moves upscale

•The audible tone from the speaker increases in frequency

•If the hand-held probe contains an LED, its blink rate will increase

3.If the probe tip is held over the leak source the instrument will zero-out the leak, causing all gas indicators to return to their idle state. Briefly moving the probe away from the leak allows the instrument to quickly regain its sensitivity. Returning to the leak source will again cause the instrument to respond in a positive manner.

4.By repeating Step 3, the instrument will reliably and repeatedly pinpoint the leak with each pass over the leak source.

Instruction 3015-4342

31

Page 34 Page 36
Image 35
Page 34 Page 36
Contents Infrared Refrigerant Gas Leak Detector H25-IRRegister Your Warranty by Visiting WarrantyTable of Contents Parts and Service Introduction Safety PrecautionsHazard Symbols AC Power and GroundingMisuse and Modifications to Instrument Case of Malfunction CleaningExplosive Atmosphere Working Inside the InstrumentUnpacking and Initial Checks Ordering InformationFeatures and Capabilities Leak Rate = Flow Rate x Gas Concentration Functional OverviewFront View Names and Functions of ComponentsRear View Interior Standard Probe with LED and Programmable Pushbutton Standard ProbeSmart Probe Smart Probe Keylock Function System Menu Menu SystemTurning on the Instrument Connecting the ProbeConnecting the AC Power Cord Preparing for OperationLeak Units System SetupMain Menu System Setup Menu Gas Type4 4-20 mA Loop RelaysClock Pchk ModeReset Defaults BrightnessRange Configuring the Setups FunctionSetup Name Setpoint Feedback ModeSearch Auto Zero CalibrationExternal Relay Connections Typical Relay 1 Wiring4-40 mA Current Loop Connection MA Current Loop ConnectorPreparing for Operation H25-IR Calibration Data Menu CalibrationSelecting Internal or External Calibration Internal Calibration SelectionExternal Calibration Selection and Setup Internal Calibration CALExternal Calibration Material Required ProcedureCAL Factor Improving PPM Measurement Accuracy using the CAL Factor Restoring Factory Calibration Adjusting the CAL FactorCalibration H25-IR Operation Using the H25-IRPower Initial SetupRange Selection Setup SelectionSearching for a Leak Volume AdjustmentMeasuring the PPM Level Measuring the Leak RateLog Menu Logging Measured ReadingsWorking with Logged Measurements Clearing the Log RS-232 Communication What to Do when a Fault OccursWhat is PCHK? Diagnostics MenuOperation H25-IR Sensor Data MaintenanceDiagnostics Menu Last Fault Factory Factory Menu Factory MenuIR Emitter PressureLeak Temp Auto GainLeak Rate Leak GasSensor Cal Leak TempcoFirmware Model SelectProbe Type Items Required Flashing MemorySelect Setup Communications Select File Load Flash Image Removing the Top Cover Part ReplacementProbe Tip Filter & O-Ring Replacement Fuse ReplacementInternal Filter Replacement Replacement Parts Parts and ServiceUnited States Service CentersCFCs, HCFCs, HFCs and Halogens SpecificationsSpecifications H25-IR Continuous Appendix a Factory DefaultsAppendix a H25-IR H25-IR Appendix a Headquarters Hunt Valley Circle, New Kensington, PA
Top Page Image Contents