Bacharach H25-IR manual Relays, 4 4-20 mA Loop

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H25-IR

Preparing for Operation

 

 

2.4.3 Relays

1 = NOT USED

2 = NOT USED

3 = NOT USED

4 = NOT USED

Four SPDT relays (rated 3 A, 240 VAC) can be individually programmed to energize under any one of 11 different operating conditions. The contacts of these relays can be connected to an external device that will activate when the designated operating condition is met. Refer to Section 2.7 External Relay Connections.

Use the Up and Down buttons to highlight the relay to be programmed. Press ENT to make the selection and display that relay’s assignment screen.

Use the Up and Down buttons to highlight the desired operating condition for the selected relay. Press ENT to save the selection.

RELAY 1 ASSIGNED TO

NOT USED

CLOSE >= SETPOINT

CLOSE < SETPOINT

CLOSE ON FAULT

CLOSE DURING CAL

CLOSE IN MEASURE

CLOSE AT LOG LIMIT

CLOSE IN SETUP 1

CLOSE IN SETUP 2

CLOSE IN SETUP 3

CLOSE IN SETUP 4

NOTE: SETPOINT is the gas value as entered per Section “2.5.5 Setpoint.”

LOG LIMIT is the total accumulated leak value as entered per Section “4.2.10.4 Setting the Log Limit.”

For example: If Relay 1 is programmed to “CLOSE AT LOG LIMIT,” its N.O. contacts can be connected to an external alarm device (e.g. strobe light or buzzer) that will activate when the total accumulated leak value in the data log has reached its programmed limit.

TIP: When measuring the total leak-rate of a system, it’s important to clear the log per Section “4.2.10.2 Clearing the Log” before starting a new series of leak-rate measurements.

2.4.4 4–20 mA Loop

EDIT LOOP FACTOR 0.016ppm

Selecting the 4–20 mA LOOP function allows the current loop factor to be changed from its factory default of 0.016 ppm (corresponds to 0.016 mA per ppm), which provides an output range of 0 ppm (4 mA) to 1,000 ppm (20 mA). Refer to Equation 3.1.

Use the Left and Right buttons to move the blinking cursor across the screen to highlight the digit to be modified, and then use the Up and Down buttons to modify that digit. Press ENT to save the new loop factor.

Loop Output in mA = (Loop Factor x ppm) + 4 mA

Eq. 3.1

To facilitate loop zero and span checking, note that when the Loop parameter is selected the loop output is set to 20 mA, and upon exiting this parameter the loop output is set to 4 mA.

Instruction 3015-4342

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Contents Infrared Refrigerant Gas Leak Detector H25-IRRegister Your Warranty by Visiting WarrantyTable of Contents Parts and Service Hazard Symbols Safety PrecautionsAC Power and Grounding IntroductionExplosive Atmosphere CleaningWorking Inside the Instrument Misuse and Modifications to Instrument Case of MalfunctionUnpacking 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 SystemConnecting the AC Power Cord Connecting the ProbePreparing for Operation Turning on the InstrumentMain Menu System Setup Menu System SetupGas Type Leak Units4 4-20 mA Loop RelaysReset Defaults Pchk ModeBrightness ClockRange 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 Selecting Internal or External Calibration CalibrationInternal Calibration Selection Calibration Data MenuExternal 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 Power Using the H25-IRInitial Setup OperationRange 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 What is PCHK? What to Do when a Fault OccursDiagnostics Menu RS-232 CommunicationOperation H25-IR Sensor Data MaintenanceDiagnostics Menu Last Fault IR Emitter Factory MenuPressure Factory Factory MenuLeak Rate Auto GainLeak Gas Leak TempSensor 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
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