Hach 900 manual Section, Front Panel, Keypad and Display, Humidity Indicator

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Section 2

Figure 1 Interface Connectors

1

2

1.12 V dc

2.Auxiliary

2.3 Front Panel

The front panel consists of the keypad, liquid crystal display, and the internal case humidity indicator (Figure 2).

2.3.1 Keypad and Display

The sampler controller is equipped with a 24 character alphanumeric liquid crystal display which automatically steps the user through the program settings.

2.3.2 Humidity Indicator

The internal case humidity indicator (Cat. No. 2660) turns pink when the internal case humidity exceeds 60 percent.

The sampler is equipped with an internal desiccant module (Cat. No. 8849) to absorb any humidity trapped in the case during final assembly. Under normal operating conditions, this desiccant provides long-term protection against condensed moisture inside the case.

Replacement of the internal desiccant module is only necessary if the indicator turns pink. See to section 5.8 on page 35 for details.

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Front Panel

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Contents Sigma 900 Composite Sampler Page Table of Contents Table of Contents Controller Dimensions Pump/Controller HousingSample Volume Sample Volume RepeatabilityPage Interface Connectors Instrument DescriptionReceptacle Caps General InformationHumidity Indicator SectionFront Panel Keypad and DisplaySafety Information Safety InformationHazardous Locations Precautionary LabelsUse of Hazard Information Confined Space Entry PeligroDefinition of Confined Space Unpacking the Instrument Selecting the Installation SiteInstallation Mounting the Sampler Attaching the Intake LineVinyl Intake Tubing Teflon-Lined Polyethylene Intake LineSetting Up the Intake Line and Strainer Installing the Full Bottle Shut-OffSetting Up the Intake Line and Strainer Choosing BottlesPower Connections Power Connections12 V dc Connector Pin Assignments 12 V dcAuxiliary Connection Auxiliary Pin AssignmentsAuxiliary Connection Contact ClosuresMA Input 20 mA Interface and Pulse Duration Input Splitter InterfacePage Keypad and Key Functions Tips and Techniques for Programming the Instrument Tips and Techniques for Programming the InstrumentSection Setting the Time and Date Bottle Setup ModeSetting the Time and Date 1035 AM 24OCT00Section Explanations of Program Messages Manually Operating the Sample Pump Manual ModeData Logging Measurements Triggered by Liquid Levels or Flow Measurements Triggered by Liquid Levels or FlowMode Section Programming the Sampler for Level Control Other Displayed MessagesHow to Calculate Pulses/Counts Section Flow Proportional OperationExample Flow Proportional OperationTherefore, the value for Intv = Cnts is Calculate t You want to collect 32 samples over an 8-hour period Page Cleaning the Sampler Removing and Opening the ControllerRe-installing the Bottom Panel Re-installing the Bottom PanelInternal Desiccant Module Section Internal Desiccant ModuleCircuit Board Identification Internal Case Humidity Indicator Memory BatteryMotor/Gear Box Motor/Gear BoxRepair Service Ordering Information for the U.S.AContact Information for Europe Limitation of Remedies Limited WarrantyLimitations Page Tray/Positioner Parts and AccessoriesDescription Part Number Page Program Flow Chart Page Maintenance TemperatureLead-Acid Gel Cell Batteries ChargingLead-Acid Battery Storage Recommendations Nickel-Cadmium Battery Storage RecommendationsStorage Temperature Maximum Recommended Storage Time Appendix BExploded View Drawings Exploded View 1Item Number Description Appendix C Exploded View 2 Appendix C Exploded View 3 Part Appendix C Exploded View 4Part Description Appendix C Exploded View 5 Appendix C Exploded View 6 Item Number Description Part Number