Liebert 3000 manual Analog/Digital Inputs, View Run Hours Log

Page 34

Operation with Advanced Microprocessor with Graphics Control

3.11Analog/Digital Inputs

Selecting ANALOG/DIGITAL INPUTS steps to the following menu:

•READ ANALOG INPUTS

•SETUP ANALOG INPUTS

•READ DIGITAL INPUTS

•SETUP DIGITAL INPUTS

3.11.1Read Analog Inputs

The four (4) analog sensor inputs can be monitored from the display. The inputs are filtered, then dis- played along with the text label assigned during setup.

3.11.2Setup Analog Inputs

For installation of analog sensors, see Analog Setup on page 11.

After selecting a compatible sensor and properly wiring it to the terminals, set the control to monitor the sensor according to the following instructions.

Slope

The slope is a multiplier used to scale the input signal. The slope can be positive (rising) or negative (falling) and can range from 0 (resulting in a horizontal line) to ±999. The slope for a 0-5 volt input is per 1 volt input; for 0-10 volt input, it is per 2 volt input; and for 4-20 mA, it is per 4 mA input. For example, assuming an intercept of 0, for a 0-10 volt sensor input with a slope of 50, an input of 1 volt would be displayed as 25: 1x(50/2); 2 volts would be 50: 2x(50/2); 3 volts would be 75: 3x(50/2); etc.

Intercept

The intercept is an offset from point 0 corresponding to 0 volts or 0 mA input. The intercept can be positive or negative and can be a point from 0 to ±999. Adding an intercept of 100 to the slope example above, 1 volt would be 125: 100 + (1x[50/2]); 2 volts would be 150: 100 + (2x[50/2]); 3 volts would be 175: 100 + (3x[50/2]); etc.

NOTE

For a 4-20 mA input sensor, if the desired reading at 4 mA input is 0, then an intercept of -1 x slope would be required. For example, assuming a slope of 50, the formula would be ([-1 x 50] + 4 x [50/4]) = 0. The intercept is -50.

Text

You may enter a custom label for each analog input. The text label can be 20 characters in length including any of the following:

ABCDEFGHIJKLMNOPQRSTUVWXYZ#%*-0123456789, or space.

3.11.3Read Digital Inputs

The four custom alarm inputs can be defined to be digital inputs. Digital inputs are used to sense cus- tomer devices for status display purposes only and will not activate the audible alarm.

3.11.4Setup Digital Inputs

A digital input is enabled by defining one of the four custom alarms to be STATUS ONLY type in the alarm setup screen. The digital input is given a name by specifying it to be one of the optional alarms or a custom text alarm. See 3.4.3 - Setup Alarms and 3.4.4 - Setup Custom Alarms.

3.12View Run Hours Log

Selecting VIEW RUN HOURS LOG will step to the following menu:

•VIEW 24 HOUR RUN TIME HISTORY

•VIEW TOTAL RUN HOURS

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Contents Liebert Challenger Page Table of Contents Run Diagnostics Alarm Descriptions Component Operation and MaintenanceHumidifier Figures Page Glycool Chilled Glycol Cooling Systems System DescriptionsCompressorized Systems Chilled Water SystemsStart-Up Procedure Basics Advanced microprocessor control panelAdvanced microprocessor a control for Challenger Status Display Status/Alarm DataMain Menu MENU/ESC Run Hours Log Setpoints/SetupDefault setpoints and ranges Analog SensorsSetup System Setup OperationSelect Options Show DIP SwitchesCalibrate Sensors Default Time Setup AlarmsAlarm default time delays Alarm Delay secondsStandard Custom Alarm Messages Humidity HUM Control MethodSet Status Display Analog SetupCalibrate Actuator Test Outputs Run DiagnosticsShow Inputs Test Control BoardControl Circuit Board Change PasswordsDate and Time LCD Display ContrastControl Outputs DIP SwitchesNon-Volatile Memory Control output LEDsOperation with Advanced Microprocessor with Graphics Control Advanced microprocessor with graphics control menu View/Set Alarms See 3.7.7 Set Status DisplaySetup Alarms Setup Water Detect Floor Plan Setup Custom AlarmsView Water Detect Floor Plan for Optional LTM1000/LT750 Operating Status System SetupCold Start Delay View/Set Control SetpointsIR Flush Overfill infrared humidifiers only Auto Restart DelayDefault Settings and Ranges Chilled Water/Hot Water/Econ-O-Coil FlushCalibrate Valve Actuator Select Control Algorithm Chilled Water and SCR Reheats onlyRun Diagnostics Select Humidity Sensing ModeShow Inputs Plot Graphs Setting optionsModify Plot Scales Analog/Digital Inputs View Run Hours LogView Total Run Hours View 24 Hour Run Time HistoryLCD Contrast Nonvolatile Memory Response to Control Types Proportional Control Temperature ControlCooling/Heating Required, in Percent % PID Control Chilled Water or SCR Reheats onlyChilled Water Cooling Glycool CoolingDual Cooling Source Cooling/dehumidification load status responseHot Water Reheat Humidity ControlHeating Operation Electric Reheat SCR Electric Reheat Requires Special Control SoftwareHumidification Operation System Activation Control TypesProportional Control Time between peaks x 5% Connecting the Analog Sensors Load Control FeaturesAdditional Features Short Cycle ControlWater Detection Display Installation-LT750 DIP Switch SettingsFault LT750 Environmental UnitPhysical Connections SetupCalibration Communications Liebert Monitoring Devices and SoftwareStandard Alarms Change FilterCompressor Overload Custom AlarmsHigh Temperature High Head PressureLoss of Power High Temperature and Low Temperature SimultaneouslyHumidifier Problem Infrared Humidifiers Low TemperatureOptional/Custom Alarms System Testing Water Detection Sensor FirestatSmoke Detector Liebert unit Recommended Liquitect location Floor drainRemote Shutdown Zone leak detection kit installation scenariosFilters Distance From UnitBelt Blower PackageFan Impellers and Bearings Air DistributionDischarge Pressure Refrigeration SystemSuction Pressure SuperheatThermostatic Expansion Valve Operation AdjustmentHot Gas Bypass Valve Operation Outdoor fan/condenser configuration Air Cooled CondenserRegulating Valve Water/Glycol Cooled Condensers Coaxial CondenserValve spring guide Glycol Solution Maintenance Adjusting Collar NutCompressor Functional Check Compressor ReplacementMechanical Failure Compressor Replacement Procedure Electrical FailureInfrared Humidifier Cleaning the PanHumidifier Removing the PanAutoflush Controls Autoflush Infrared Humidifier Cleaning SystemAutoflush Operation Steam Generating HumidifierOperation ControlsPart Capacity Number Voltage Lbs/hr kg/hr Replacing the CanisterHumidifier canister part numbers 200-460Circuit Board Adjustments Drain Tempering FeatureChilled water troubleshooting Blower troubleshootingSymptom Possible Cause Check or Remedy Compressor and refrigeration system troubleshooting Compressor and refrigeration system troubleshooting Infrared humidifier troubleshooting Dehumidification troubleshootingGlycol pump troubleshooting See 6.4.8 Compressor Functional Check and TableSteam generating humidifier troubleshooting Reheat troubleshooting Compressor Filters Steam Generating HumidifierBlower Section Air Cooled Condenser if applicableGlycol Pump FiltersWater/Glycol Condenser if applicable Electrical PanelSemiannual Maintenance Inspection Checklist Page Ti n Ne tIti That
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3000 specifications

The Liebert 3000 is a cutting-edge power protection solution designed to provide reliable and efficient backup power for critical applications. This uninterruptible power supply (UPS) system is engineered to safeguard sensitive electronic equipment from power disturbances, ensuring uninterrupted operations in data centers, telecommunications, and industrial environments.

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