Bacharach 2772-0803 manual System Alarms, Constant, Flashing, Optics, Door Open

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REMOTE INTELLIGENT SENSOR - AREA MONITOR

SYSTEM OK icon confirms the system is operating normally.

NUMERICAL VALUE (in ppb or ppm) alternates with % value of remaining cassette life. When cassette is new the display reads 99%. As the tape is used, the numerical value reduces in proportion.

NOTE: If the system is turned off and then on at SW1, or if the tape reset button is used, the tape counter is reset to 99%. This occurs despite the actual tape remaining.

3.7.2SYSTEM NORMAL, GAS CONCENTRA- TION ABOVE THE ALARM THRESHOLD. Besides the SYSTEM OK and the NUMERICAL VALUE of the measured concentration, a ‘FLASH- ING BELLS’ icon is shown across the top of the display. This provides a strong visual warning that a Gas Alarm is present. The display is maintained during the period that the threshold level is ex- ceeded and until a complete sample period has passed where the concentration falls below the alarm level.

3.7.3OVER RANGE ALARM. When the moni- tored concentration exceed the system range, the ‘flashing bells’ icon is accompanied by the numerical readout displaying 9999 (ppb models) or 99.99 (ppm models).

3.7.4SYSTEM FAULT. When self diagnostics detect a fault condition, the SYSTEM OK icon is turned off and one or more fault icons are dis- played. Icons and their meaning are as follows:

Constant

This symbol shows that the input supply has failed, or is not connected, and the system is operating from the internal back-up battery.

Flashing

Shows that the back-up battery charge is low. This could occur with long interruption of input power. It can also warn that the battery is not maintaining an adequate charge during NORMAL operation.

Constant

Warns that the cassette has run out of tape, or the tape has broken, or the tape gate has been left open.

Flashing

This symbol shows that sampling vacuum has dropped. The cause could be a pump failure or an air leak.

Optics

Icon warns that the light level is not acceptable. In addition, the affected channel is shown by a 1 or 2, or both.

NOTE: This will occur if the tape gate is opened, an external light source enters the sampling input FET tube(s), the tape breaks, runs out, or, if the cassette is changed without first going into the TEST Mode.

Door Open

This icon is displayed when the system door is open. It is also shown if the ‘door closed switch is incorrectly adjusted or if the door securing screws are not tight, be careful not to over tighten them! The switch adjustment procedure is detailed in Sec- tion 4.7.

3.8SYSTEM ALARMS

The standard RIS provides displays of gas and fault alarms, and a combined ‘relay’ output. Basic systems have one gas alarm set point with a default value established by the system software. The alarm set point is also user adjustable through the RIS keyboard so that it can be set to an appropriate local value. Set point adjustment is covered in Section

2.8.2.3.The default values are shown in the Table #1. A fault alarm is initiated by any one of several

monitored parameters. Appropriate icons are shown on the display when a fault is detected.

3.8.1GAS ALARM. When a gas concentration value above the alarm set point is detected, the ‘flashing bells’ icon provides visual warning. Simul- taneously the combined gas alarm/fault relay opens. Both warnings, visual and relay signal, remains active until a gas concentration lower than the set point is measured over a complete sampling cycle (normally 4 min.). This ensures that small varia- tions around the set point do not cause intermittent alarm operation.

3.8.3ADDITIONAL GAS ALARM SET POINT. When the Relay alarm Option is installed, a second alarm level set point is provided. This second set point is also user adjustable. In this case there are three active relays, one for each alarm level, and one for fault indication.

Instruction 2772-0803

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Contents Instruction Remote Intelligent Sensor Area Monitor Declaration of Conformity Contents Contents Cleaning the Sampling Input and Optics Block Verifying That a GAS Alarm WAS Caused by GASPreparation Removal of the Mechanical Chassis Replacing the Mechanical ChassisRIS TEST/FAULT Parameter LOG Sheet A1.1 Adjusting Light Levels on Phase 1 RIS UnitsMonitored Concentration Levels High Supplement aBattery Backup Continuous Diagnostics & System Test ModeUser Selectable Alarm SET Points Optional FeaturesAccuracy Power Input RequirementsPhysical OutputsDisplay Internal BACK-UP BatteryKeyboard EnvironmentalTable #1 RIS Catalog Numbers & Data Basic Principles System DescriptionDoor Open and Cover Removed from Back of Door Remote Intelligent Sensor Area Monitor Remote Intelligent Sensor Area Monitor Mechanical Installation Battery ConnectionElectrical Installation UnpackingSpecification System Power Supply Consideration & SelectionRIS Type Sample LinesSystem Check 1 Volt ConversionTools & Materials Required Tape Cassette LoadingCheck and Adjust System Interruption of Test Mode Cycle. If For detailed instructions on adjustmentOption PCB Installation Without Terminal USESilkscreen Idents NAL Phase 2 Base Board Terminal Strips Remote Intelligent Sensor Area Monitor Remote Intelligent Sensor Area Monitor Remote Intelligent Sensor Area Monitor Twin Track Tape SAMPLING. At Complete Sampling SequenceDensity & Time Operating Modes CHANGE-OVER from Density to Time ModeMinimum Sample Time Tape Cassette LifeConstant System AlarmsFlashing OpticsTest Mode DiagnosticsUsing the Keyboard Optional FeaturesInstalling Test Card Printer Operation & USE Optional FeatureSW1 Total Switch # 2 is not used and is left ‘ONWhite RED Prdy Black Pprs BaudOFF Data Busy Ground Non-Bacharach Printer InterfaceVerifying That a GAS Alarm WAS Caused by GAS Maintenance GeneralAdjusting Light Levels Clearing a Spurious AlarmAdjusting the Door Switch Checking and Adjusting System Flow RateDisabling the ‘DOOR OPEN’ Alarm Measuring Pump Current Cleaning the Sampling Input and Optics BlockCleaning Optics block Changing a Pump Stepping Clamp VerticalKEY Parameter Checks Exterior CleaningTroubleshooting General Input Path CleaningMechanical Tightness Pump CheckDoor Fault Light FaultsExcessive Tape USE Tape BreakageRecommended Spares System Power SuppliesModel Dependent Parts Common Parts Service CentersOptions and Supplies PennsylvaniaHold 200 toRemote Intelligent Sensor Area Monitor Instruction S-A3 S-A4 Instruction