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Related Manuals for Emerson MRLDS 450
Summary of Contents for Emerson MRLDS 450
- Page 1 MRLDS 450 User Guide 026-1316 Rev 5...
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Page 2: Table Of Contents
Contents 1 Introduction ......................1 1.1 About Manual ....................1 1.2 General Safety Requirements ................1 Safe Connection of Electrical Devices ............... 2 2 Product Description ...................3 2.1 Intended Uses/Applications ................3 MRLDS-450 ...................... 3 2.2.1 MRLDS-450 Product Overview ............. 3 2.2.2 MRLDS-450 Design Features .............. - Page 3 5 Care and Maintenance ..................19 5.1 Maintenance Intervals ..................19 5.2 Adjustments ..................... 19 5.2.1 Introduction ..................19 5.2.2 General Calibration Procedure .............. 20 5.2.3 Zero Adjustment ................... 21 5.2.4 Span Adjustment ................... 21 5.2.5 System Bump Test ................. 22 5.3 Troubleshooting ....................
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Page 4: Introduction
CAUTION! Except for maintenance detailed in this manual, these products should only be opened and/or serviced by authorized Emerson Technical Support personnel. Failure to comply may void the warranty. -
Page 5: Safe Connection Of Electrical Devices
CAUTION! Operator assumes responsibility for complying with all laws, rules and regulations governing the use of this product. CAUTION! Use only genuine Emerson parts and accessories. Failure to comply may impair the operation of the product and/or void the warranty. -
Page 6: Product Description
For your safety, DO NOT use it in hazardous (classified) locations. 2.2 MRLDS-450 2.2.1 MRLDS-450 Product Overview The Emerson MRLDS-450 continuously monitors indoor or outdoor ambient air for the following gases: • Refrigerants • Oxygen • Toxic and combustible gases... -
Page 7: Mrlds-450 Design Features
2.2.2 MRLDS-450 Design Features • Transmitter: IP66 rated ABS enclosure • Power options: » 24VAC » 19.5 to 28.5VDC • Diagnostic/Status LED (3 color): Green, Orange, and Red • Configurable output signal options » 3× Relays (high alarm/low alarm/fault) » 1× Analog Output (4 to 20mA, 0 to 5V, 0 to 10V, 1 to 5V, 2 to 10V) »... -
Page 8: Installation
Installation CAUTION! The manufacturer of this product requires that a bump test or calibration be performed following installation to verify instrument functionality. 3.1 General Information Every detail of installation site selection is critical to ensure overall system performance and effectiveness. Strict compliance and considerable thought must be given to every detail of the installation process, including, but not limited to the following: •... -
Page 9: Electrical Installation
3.4 Electrical Installation 3.4.1 Preparations NOTICE: The MRLDS-450 has a jumper on the analog output. This jumper MUST be removed to use the analog 4-20mA output signal. If the jumper is removed AND the 4-20mA output signal is not used, the unit will go into fault. NOTICE: If analog output is configured for 4 to 20mA output, ensure that the current loop is connected to a sinking current loop monitor before powering on the instrument. -
Page 10: Avoiding An Open-Loop Fault Alarm Condition On Power Up
3.4.3 Avoiding an Open-Loop Fault Alarm Condition on Power Up To avoid powering up into an Open Loop-Fault. The MRLDS-450 Gas Detector by default has the analog output configured to 4-20mA. One of the features of the 4-20mA analog output is to alarm the sensor when an open-loop is detected on the 4-20mA circuit. -
Page 11: Modbus Rtu Rs-485 Interface
When configured according to the factory default settings, the relays are de-energized during normal operation (not fail-safe). Fail-safe mode can be configured. When configured for Failsafe operation, relays are energized during normal operation. Failsafe operation ensures reays are triggered in cases of power failure at the instrument. - Page 12 Site Supervisor Setup - Device and COMM Figure 3-2 - Site Supervisor Network Setup...
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Page 13: Conclusion
E2 Setup - Device and COMM Figure 3-3 - E2 Network Setup 3.4.6 Conclusion After all wiring is completed, power the transmitter and confirm operation, and then prepare to seal the enclosure. Align the enclosure gasket (primary transmitter and remote sensor if equipped), replace the lid, and tighten the six (6) screws. -
Page 14: Operation
Operation 4.1 Overview of Normal Operation CAUTION! Before leaving the instrument for normal operation, check the configuration for proper settings and check calibration. 4.1.1 Applying Power and the Start-up Sequence After applying power, the instrument will go through a start-up sequence (initialization, audible/visual test and self-test sequence). -
Page 15: Verifying The Modbus Signal
The instrument may also enter several special states, these are indicated by the specific analog output levels indicated in Table 4-3 Mode of Operation 1-5V 0-5V 2-10V 0-10V 4-20mA Instrument Fault ≤ 0.3V ≤ 0.6V ≤ 1.2mA Offline Mode Maintenance 0.75V 1.5V Drift below zero... -
Page 16: Reset System To Factory Default Settings
Figure 4-1 - Magnetic Switches Switch locations above are referred to in this document as MAG#1 and MAG#2. Depending on the duration the switch is held, a short “tap” or long “hold” will be detected. • To carry out a tap function, tap the relevant switch location for one (1) second, until a single “chirp” is heard and remove the wand to confirm a “tap.”... -
Page 17: Mrlds-400 Series Application
4.2. MRLDS-400 Series Application Download the MRLDS-400 Series App. The companion smartphone application allows users to perform a variety of functions to configure and interact with the MRLDS-450 gas detector, including: • View real-time measurements • Configure instrument • Test outputs •... -
Page 18: Instrument Configuration
State Status Ring Description Warm-up Green Gas detector stabilizing after power on or restart. Normal Green Normal Operation. Low Alarm Yellow Gas measurement has exceeded low alarm setpoint. High Alarm Gas measurement has exceeded high alarm setpoint. Gas Detector in maintenance mode and is not actively Offline Orange monitoring gas. -
Page 19: Change Bluetooth® Passcode
4.2.3.3. Change Bluetooth® Passcode To prevent unauthorized access to instrument status, the default instrument Bluetooth® passcode code should be changed during commissioning. To change Bluetooth® passcode: • On the Configure tab select Bluetooth Passcode. Enter new 6-digit passcode for the instrument and select OK. -
Page 20: Modbus Configuration
Alarm Latching Enabling alarm latching will maintain alarm or fault condition even after the alarm or fault condition is no longer active. When latched, the alarm or fault condition must be manually acknowledged before the condition will be cleared. This allows transient alarm or fault conditions to be identified. If an alarm is latched, for example, the condition has occurred but is no longer active, an acknowledgment button will appear on the Home screen. -
Page 21: Output Configuration
4.2.3.7. Output Configuration Analog Output Range Sets instrument analog output range. Available ranges: 1-5V, 0-5V, 0-10V, 2-10V, 4-20mA (default). To set range: • On the Configure tab select Outputs, then select Analog Output Range. Select desired range and select OK to confirm. Buzzer Enable or disable buzzer. -
Page 22: Care And Maintenance
Check for proper buzzer and relay operation* Every 6-12 Months** Check signal transmission to the BMS/BAS (central controller) if connected* Calibrate the sensor or contact Emerson Technical Support for sensor exchange with factory - calibrated sensor As Required Replace sensor module(s) As Required Table 4-2 - Status Ring of Various Instrument States * These can be activated via Modbus commands or via MRLDS-400 Series App. -
Page 23: General Calibration Procedure
NOTICE: Emerson recommends calibrating detectors within the application- specific condition and with target gas. This method of zeroing the detector in the application environment and performing a target gas calibration is more accurate. A surrogate gas calibration may only be performed as an alternative if a target gas calibration is not possible. -
Page 24: Zero Adjustment
5.2.3. Zero Adjustment Ambient air can be used to zero the sensor instead of synthetic air only if the area is known to be free of the target gas or any gas to which the sensor may be cross-sensitive. In this case, no cylinder or calibration adapter is needed for the zero adjustment. -
Page 25: System Bump Test
Complete zero adjustment: MRLDS-400 App: App will countdown to completion. If calibration is successful, proceed to Step 5. If calibration is unsuccessful, return to the Home screen and press the Acknowledge button to clear the zero calibration fault. Manual: The LED will blink GREEN-ORANGE, GREEN-ORANGE-ORANGE, GREEN-ORANGE- ORANGE-ORANGE, etc. -
Page 26: Fault Codes
5.3.2. Fault Codes NOTICE: If a sensor fault occurs during a gas alarm condition, then the fault overrides the alarm condition. Sensor faults may be decoded using the following table. Note that several faults may be reported at the same time. - Page 27 Fault Bit System Fault Possible Cause Required Action(s) Magnetic and/or Tactile 0x00008000 Stuck switch switch activated for > Call product support 1 minute Cannot detect sensor Check sensor 0x00010000 Sensor Element Out element connection Fault detected in sensor 0x00020000 Sensor Element Fault Replace sensor nodule element Sensor ADC Sensor...
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Page 28: Sensor Maintenance
5.4. Sensor Maintenance CAUTION! This product uses semiconductors that can be damaged by electrostatic discharge (ESD). When handling the PCB, care must be taken so that the electronics are not damaged. Figure 5-2 - MRLDS-450 Components Figure 5-3 - IP66 Sensor Configuration IP66 Product arrangement shown for reference;... -
Page 29: Replacing Sensor Module
5.4.1. Replacing Sensor Module CAUTION! This product uses semiconductors that can be damaged by electrostatic discharge (ESD). When handling the PCB, care must be taken so that electronics are not damaged. To replace the gas detector’s sensor module: 1. Power-down the gas detector. 2. -
Page 30: Additional Information
Additional Information 6.1. Sensor Principle 6.1.1. Electrochemical Sensors Electrochemical sensors measure the partial pressure of gases under atmospheric conditions. The monitored ambient air diffuses through a membrane into the liquid electrolyte in the sensor. The electrolyte contains a measuring electrode, a counter-electrode, and a reference electrode. An electronic “potentiostat” circuit ensures a constant electrical voltage between measuring electrode and reference electrode. -
Page 31: Infrared Sensors
Therefore it must not be disposed of through these channels. The device can be returned to Emerson for disposal. Please do not hesitate to contact Emerson Technical Support if you have any further questions on this issue. -
Page 32: Technical Specifications
6.3. Technical Specifications 6.3.1. General Specifications Category Specifications Normal operation: 4 to 20mA (default) Drift below zero: 3.8mA Measuring range exceeded: 20.5mA Analog Current Instrument fault: ≤ 1.2mA Fault on analog interface: > 21mA Offline mode/Maintenance signal: 3mA steady signal 0 to 5V;... - Page 33 Category Specifications Enclosure protection IP66 Physical Enclosure Size MRLDS-450 IP66: 6.5×6.5×3.4” Specifications (W×H×D) (Approx.) (165×165×87mm) Weight (Approx.) MRLDS-450: 1lb, 1oz (480g) Temperature - 40 to 120ºF (-40 to 50ºC) Storage temperature - 5 to 100ºF (-20 to 40ºC) 5 to 90% RH, non-condensing Humidity (15 to 90% RH, non-condensing, EC sensors excl.
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Page 34: Ordering Information
R32, 0-1,000ppm R600, 0-100% LEL R600, 0-100% LEL 809-1086 809-1088 R290, 0-100% LEL R290, 0-100% LEL Table 7-1 - Part Numbers and Ordering Information Emerson P/N MRLDS-450 Accessories 809-1190 Calibration Adapter Kit Table 7-2 - Accessory Part Numbers and Ordering Information... - Page 35 The contents of this publication are presented for informational purposes only and they are not to be construed as warranties or guarantees, express or implied, regarding the products or services described herein or their use or applicability. Emerson reserves the right to modify the designs or specifications of such products at any time without notice.
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