Document Outline

• Table of Contents
• Welcome
• How to Use This Manual
  • For More Information
• Operation
  • Getting Started
    • Turning the 373 On and Off
    • What You See
      • Data Lines
      • Status Line
      • Fixed Function Keys
      • Menu Keys
    • The Touch Screen
      • Calibrate the Touch Screen
      • Navigating the Menus
      • Selecting Parameters to Display
      • Selecting Graph vs. Numeric Data
      • Selecting Units
    • The Measuring Head Assembly
    • Dew Point Measurement
      • Starting / Stopping the Pump
      • Measuring the Room Ambient Dew Point Temperature
      • The Status Line
        • The Balance Indicator
        • The Density Indicator
      • Gas Inlet Connection
      • Range Limitations
      • Swagelok( Tube Fittings
      • Cajon( Tube Fittings
        • Handling
        • Assembly
        • Retightening
  • System Configuration
    • Menu Options
    • Display Parameters
      • Dew Point
    • Graphing Data
      • Selecting Between Numeric Data and Graph
      • Changing Graph Attributes
        • Time Span
        • Scaling
          •  Autoscale
          •  Fixed Range
          •  MinMax
      • Viewing Data both as Numeric and as a Graph
    • Control Setup
      • Dew / Frost Control
        • Force Frost Below
        • Enable ORIS Below
      • Mirror Cleaning Control
      • Mirror Check Control
        • Cycle Time
        • Heating Time
        • Heat To
      • Pump Control
      • Heater Controls
      • Cooling Control
        • Water Cooling
        • Pre-Cooler (Refrigerated Cooling)
    • Changing Units
      • Temperature Units
      • Pressure Units
      • Flow Rate Units
      • Volume Ratio Units
      • Weight Ratio Units
      • Absolute Humidity Units
      • Specific Humidity Units
      • Vapor Pressure Units
    • Changing Color
      • Fore Color
      • Back Color
    • Analog Outputs
      • Selecting Which Parameter to Track
      • Scaling the Output to the Data
      • Voltmeter Connections
  • Back Panel Connections
    • Power Plug
    • Power Switch
    • RS-232
    • External Temperature
    • Mirror Temperature
    • Analog Outputs
    • Gas Input and Output
    • Hose Heaters
    • Barometric Pressure Input
    • Cooling Water
  • Measurement Tips
    • Determine the Measuring Range
      • 373 (-60 … +20 °C)
        • 373H (-40 … +70°C)
        • 373HX (-30 … +95°C)
        • 373L (-80 … +20°C)
        • 373LX (-95 … +20°C)
    • Connecting Hoses
      • Types of Hoses
        • Teflon
        • Stainless Steel
      • Heated Hoses
        • Pneumatic Connections
        • Electrical Connections
      • Hose Input and Output
        • Preferred Connections
        • Troublesome Connections
    • Cooling Requirements
      • Air Cooling
      • Water Cooling
      • Refrigerated Precooler
    • Heating Requirements
      • Head, Block, and Inner Tube Heat
      • External Hose Heat
• Installation
  • Facility Requirements
    • Environmental
    • Power
    • Cooling Water
  • Preparation for Use
    • Benchtop Use
    • Rack Mounting
  • Preparation for Shipping or Transportation
• Remote Communication
  • Introduction
  • Hardware Connection & Cabling
  • Communications Settings
  • Command Syntax
    • General Usage
    • Termination Characters
    • Leading and Trailing Spaces
    • Case Sensitivity
    • Numeric Values
  • Command Reference
    • Commands Listed By Functional Group
      • Measurement Data
        • Syntax
        • Function
          • DP?
      • Stability Indication
        • Syntax
        • Function
      • Force Frost Settings
        • Syntax
        • Function
          • ForceFrost.on[=i][?]
          • ForceFrost.below[=n][?]
      • Water Valve Settings
        • Syntax
        • Function
          • WaterValve.armed?
          • WaterValve.on?
          • WaterValve.below[=n][?]
      • ORIS Settings
        • Syntax
        • Function
          • UseOris.on[=i][?]
          • UseOris.below[=n][?]
      • Mirror Cleaning Preparation
        • Syntax
          • MinHeadRemovalTemp[=n][?]
      • Automatic Mirror Check
        • Syntax
          • AMC.on[=i][?]
          • AMC.cycleTime[=n][?]
          • AMC.heatTime[=n][?]
          • AMC.temp[=n][?]
          • AMC.dispHold[=i][?]
      • Pump Control Parameters (if available)
        • Syntax
          • Pump.on[=i][?]
          • Pump.freq[=n][?]
          • Pump.dutyCycle[=n][?]
      • Head Heater Control
        • Syntax
          • HeadHtrPID.on[=i][?]
          • HeadHtrPID.setPt?
          • HeadHtrPID.fixedSetPt[=n][?]
          • HeadHtrPID.deltaSetPt[=n][?]
          • HeadHtrPID.fixedOn[=i][?]
          • HeadHtrPID.deltaOn[=i][?]
      • External Hose Heater Control
        • Syntax
          • ExtHtrPID.on[=i][?]
          • ExtHtrPID.setPt?
          • ExtHtrPID.fixedSetPt[=n][?]
          • ExtHtrPID.deltaSetPt[=n][?]
          • ExtHtrPID.fixedOn[=i][?]
          • ExtHtrPID.deltaOn[=i][?]
      • Precooler Control
        • Syntax
          • PreCoolerPID.on[=i][?]
          • PreCoolerPID.setPt?
          • PreCoolerPID.fixedSetPt[=n][?]
          • PreCoolerPID.deltaSetPt[=n][?]
          • PreCoolerPID.fixedOn[=i][?]
          • PreCoolerPID.deltaOn[=i][?]
      • Analog Outputs
        • Syntax
          • Ana1.param[=i][?]
          • Ana1.paramMin[=n][?]
          • Ana1.paramMax[=n][?]
          • Ana1.OutMin[=n][?]
          • Ana1.OutMax[=n][?]
          • Ana1.calGain[=n][?]
          • Ana1.calZero[=n][?]
          • Ana1.output=n
          • Ana1.hold[=i][?]
          • Ana2.param[=i][?]
          • Ana2.paramMin[=n][?]
          • Ana2.paramMax[=n][?]
          • Ana2.OutMin[=n][?]
          • Ana2.OutMax[=n][?]
          • Ana2.calGain[=n][?]
          • Ana2.calZero[=n][?]
          • Ana2.output=n
          • Ana2.hold[=i][?]
      • Mirror Temperature Calibration Coefficients
        • Syntax
          • MirrorTempCal.r0[=n][?]
          • MirrorTempCal.a[=n][?]
          • MirrorTempCal.b[=n][?]
          • MirrorTempCal.c[=n][?]
          • MirrorTempCal.avg[=n][?]
          • MirrorTempCal.avgBand[=i][?]
          • MirrorTempCal.sensCode[=i][?]
          • MirrorTempCal.coefType[=i][?]
      • External Temperature Calibration Coefficients
        • Syntax
          • ExtTempCal.r0[=n][?]
          • ExtTempCal.a[=n][?]
          • ExtTempCal.b[=n][?]
          • ExtTempCal.c[=n][?]
          • ExtTempCal.avg[=n][?]
          • ExtTempCal.avgBand[=i][?]
          • ExtTempCal.sensCode[=i][?]
          • ExtTempCal.coefType[=i][?]
      • Head Temperature Calibration Coefficients
        • Syntax
          • HeadTempCal.a0[=n][?]
          • HeadTempCal.a1[=n][?]
          • HeadTempCal.a2[=n][?]
          • HeadTempCal.a3[=n][?]
          • HeadTempCal.avg[=n][?]
          • HeadTempCal.avgBand[=i][?]
          • HeadTempCal.sensCode[=i][?]
          • HeadTempCal.coefType[=i][?]
      • Block Temperature Calibration Coefficients (if so equipped)
        • Syntax
          • BoxTempCal.a0[=n][?]
          • BoxTempCal.a1[=n][?]
          • BoxTempCal.a2[=n][?]
          • BoxTempCal.a3[=n][?]
          • BoxTempCal.avg[=n][?]
          • BoxTempCal.avgBand[=i][?]
          • BoxTempCal.sensCode[=i][?]
          • BoxTempCal.coefType[=i][?]
      • Internal Tube Temperature Calibration Coefficients (if so equipped)
        • Syntax
          • IntTubeTempCal.a0[=n][?]
          • IntTubeTempCal.a1[=n][?]
          • IntTubeTempCal.a2[=n][?]
          • IntTubeTempCal.a3[=n][?]
          • IntTubeTempCal.avg[=n][?]
          • IntTubeTempCal.avgBand[=i][?]
          • IntTubeTempCal.sensCode[=i][?]
          • IntTubeTempCal.coefType[=i][?]
      • External Tube Temperature Calibration Coefficients
        • Syntax
          • ExtTubeTempCal.r0[=n][?]
          • ExtTubeTempCal.a[=n][?]
          • ExtTubeTempCal.b[=n][?]
          • ExtTubeTempCal.c[=n][?]
          • ExtTubeTempCal.avg[=n][?]
          • ExtTubeTempCal.avgBand[=i][?]
          • ExtTubeTempCal.sensCode[=i][?]
          • ExtTubeTempCal.coefType[=i][?]
      • Pre Cooler Temperature Calibration Coefficients
        • Syntax
          • PreTempCal.r0[=n][?]
          • PreTempCal.a[=n][?]
          • PreTempCal.b[=n][?]
          • PreTempCal.c[=n][?]
          • PreTempCal.avg[=n][?]
          • PreTempCal.avgBand[=i][?]
          • PreTempCal.sensCode[=i][?]
          • PreTempCal.coefType[=i][?]
      • Absolute Pressure Sensor Calibration Coefficients
        • Syntax
          • AbsPressCal.a0[=n][?]
          • AbsPressCal.a1[=n][?]
          • AbsPressCal.a2[=n][?]
          • AbsPressCal.a3[=n][?]
          • AbsPressCal.avg[=n][?]
          • AbsPressCal.avgBand[=i][?]
          • AbsPressCal.sensCode[=i][?]
          • AbsPressCal.coefType[=i][?]
      • Relative Pressure Sensor Calibration Coefficients (if so equipped)
        • Syntax
          • RelPressCal.a0[=n][?]
          • RelPressCal.a1[=n][?]
          • RelPressCal.a2[=n][?]
          • RelPressCal.a3[=n][?]
          • RelPressCal.avg[=n][?]
          • RelPressCal.avgBand[=i][?]
          • RelPressCal.sensCode[=i][?]
          • RelPressCal.coefType[=i][?]
      • Flow Sensor Calibration Coefficients
        • Syntax
          • FlowCal.a0[=n][?]
          • FlowCal.a1[=n][?]
          • FlowCal.a2[=n][?]
          • FlowCal.a3[=n][?]
          • FlowCal.avg[=n][?]
          • FlowCal.avgBand[=i][?]
          • FlowCal.sensCode[=i][?]
          • FlowCal.coefType[=i][?]
      • System Identification
        • Syntax
          • ID?
          • IDN?
      • Saving Changes
        • Syntax
          • SaveCfg=373
          • SaveCal=373
          • SavePID=373
• Maintenance
  • Mirror Cleaning
    • Removing the Head Cover Screw or Retaining Bar
      • Removing the Optical Assembly
      • Inspecting / Cleaning the Mirror
      • Reassemble the Mirror Components
  • Exterior Cleaning
    • Front Panel
    • Rear Fan Grills
• Drawings