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General| Sensor Type | Infrared (IR) |
|---|---|
| Operating Temperature | -40°C to +75°C (-40°F to +167°F) |
| Operating Humidity | 0 to 99% RH (non-condensing) |
| Detection Principle | Non-dispersive infrared (NDIR) |
| Target Gas | Hydrocarbons |
| Response Time (T90) | 3 seconds |
| Power Supply | 18-32 VDC |
| Output Signal | 4-20 mA |
| Approvals | ATEX, IECEx, CSA |
| Ingress Protection | IP66 |
| Detection Range | 0-100% LEL |
| Operating Voltage | 18-32 VDC |
| Output | 4-20 mA |
| Housing | Stainless steel |
Describes how to mount the Model IR400 horizontally to reduce dirt buildup on windows.
Instructions for connecting the +24 VDC power supply to the IR400.
Details on system startup, stabilization, and initial checks after applying power.
General Monitors' mission to provide safety solutions and handle products safely.
Highlights warnings to prevent injury and equipment damage.
Pre-power up checks, system operation verification, and periodic testing.
Instructions for checking and verifying shipped equipment.
Guidelines for selecting an optimal location for detector placement.
Shows dimensions for mounting the IR400 with an attached junction box.
Details on horizontal mounting, gas passage orientation, and bolt hole usage.
Safety notices for wiring, EU cable requirements, and termination in non-hazardous areas.
Warnings and cautions for sealing conduit entries in hazardous locations.
Instructions for connecting the +24 VDC power supply to the IR400.
Covers 4-20mA output, Modbus, HART, and Magnetic Switch interfaces.
Procedures for zeroing, gas checks, and calibration to ensure accurate measurement.
Explains how detector response time is determined and tested.
Steps to perform a gas check test to verify detector functionality.
Compatibility and configuration for HazardWatch System calibration.
Operating and configuring the IR400 as a stand-alone unit using the junction box switch.
Procedure for performing a zero-only calibration using the unit's zero switch.
Steps for performing a full span calibration after zero calibration.
Recommendations for establishing and following a periodic maintenance schedule.
Guidance on performing gas checks, zeroing, and recalibration procedures.
Procedure for cleaning the IR400 optical windows using a soft cloth and cleaning solution.
Instructions for lubricating neoprene rubber gaskets (O-rings) on the enclosure.
Guidelines for storing the IR400 Gas Detector and IR4000 Monitor System.
Details the two-year warranty for the Model IR400 against defects.
Explains the Beer-Lambert Law and the NDIR absorption principle used by the IR400.
Lists key system specifications including detector type, range, response time, and approvals.
Details the physical dimensions, weight, and enclosure type of the IR400.
Outlines input power, analog signal range, and area classification.
Shows analog output values for different modes and fault conditions.
Provides guidance on maximum cable lengths for power and signal connections.
Details the IR400's RS-485 serial interface for communication.
Information on the Modbus RTU protocol for device communication.
Refers to HART Field Device Specification for HART commands.
Lists system components and their corresponding part numbers.
Instructions on how to order spare parts and accessories.
Lists recommended spare parts for one year of operation.
Lists available accessories for the IR400, such as junction boxes and splash guards.
Specifies device features and HART Protocol implementation details.
Complements the instruction manual with HART communications perspective.
Identifies target audience as HART application developers and integrators.
Describes interfaces between devices and the measured process.
Section for sensor input channel details.
Details the HART interface using the 4-20mA current loop.
Refers to the Installation Manual for connection details on local interfaces.
Lists implemented common-practice commands.
Sends the unit to Run mode.
Command to set the alarm level.
Command to set the warning level.
Command to reset the event happened flag.
Reads the 5 event logging counters.
Resets the 5 event logging counters to zero.
Reads the Warning Event Log by event log number.
Reads the Alarm Event Log by event log number.
Reads the Fault Event Log by event log number.
Reads the Maintenance Event Log by event log number.
Sets the internal real-time clock.
Reads the internal real-time clock setting.
Sets the internal run time meter.
Reads the internal run time meter.
Sets the index of logged event to read.
Reads the event logged index.
Reads Calibration Event Log by event log number.
Retrieves fast changing device information.
Retrieves slow changing device information.
Retrieves device setup configuration parameters.
Sets the current range to one of two possible selections.
Sets the Gas ID or sensor type for the detector.
Sets the Calibration Input/Output type.
Sets the solenoid state (off, on, disabled).
Reads the current solenoid state.
Sets the calibration level in % of FS.
Sends the unit to Zero mode.
Sends the unit to Calibration mode.
Sends the unit to Zero/Calibration mode.
Sends the unit to Gas Check mode.
Summary table of IR400 Device Specific Commands.
Details the sampling rate of the IR400 detector.
Describes the IR400 self-test procedure during power-up.
Lists the minimum, typical, and maximum response times for commands.
Details the default Modbus setup and communication protocol.
Information on selectable baud rates for Modbus communication.
Lists selectable data formats for Modbus communication.
Describes the Modbus read query and response message structure.
Details exception response messages and codes for abnormal communications.
Details the Analog Output register and its scaling.
Describes the register for reporting and setting the IR400 operating mode.
Explains the status error register and its bit map for error conditions.
Details the register for reading/setting gas selection.
Describes the register that returns the model type.
Explains the register for retrieving the software revision.
Describes the register for reading the detector gain value.
Details the register for setting the Calibration Input/Output type.
Explains the feature for Calibration and Gas check solenoid control.
Describes the register for reading/changing the Modbus unit address.
Details the register for reading/changing the Modbus baud rate.
Explains the register for reading/changing the Modbus data format.
Describes the register that returns the primary fault.
Details the register for enabling/disabling Hazard Watch mode.
Sets/reads the minimum gas concentration level for alarm events.
Sets/reads the minimum gas concentration level for warn events.
Configures HART interface and current range settings.
Details registers for Total Receive, Function, Start Address, CRC Hi/Lo, Overrun, Framing, and Clear errors.
Returns optical path blockage percentage.
Reads the unique Gas ID number for the selected gas.
Clears event counters or resets event happened flag.
Reads/sets the hi word of device running time in seconds.
Reads/sets the lo word of device running time in seconds.
Covers Year/Month, Day/Hour, and Minute/Second for real-time clock.
Details the flag for power cycle reset and the index for event logs.
Registers for warning running time and clock time (Year/Month, Day/Hour, Minute/Second).
Registers for alarm running time and clock time (Year/Month, Day/Hour, Minute/Second).
Counters for Total Warning and Alarm events.
Registers for fault running time and clock time (Year/Month, Day/Hour, Minute/Second).
Registers for maintenance running time and clock time (Year/Month, Day/Hour, Minute/Second).
Counters for Total Fault and Maintenance events.
Registers for calibration running time and clock time (Year/Month, Day/Hour, Minute/Second).
Returns calibration code and total calibration events count.
