Taylor TW-357 manual Sensor Type, Alarms and Error Conditions

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TW-357 REV E

Sensor Type

The sensor type can be set through the menu system (MENU, 2, 4). The sensor type selection should match the sensor type that is being used in the system. This is a 4-sensor, a 7-sensor (Freeze-Guard) or an 8-sensor array. If the sensor assembly is unplugged and the main control is still on, the display will indicate that a sensor error has occurred. In addition the level indicated would be 8” on an 8-sensor assembly, 7” on a Freeze- Guard assembly or “High Alarm” on a 4-sensor assembly. This occurs because the control cannot differentiate between a very high resistance (when a thermistor is in LN2 ) and an infinite resistance (when an open circuit appears in the level sensing circuitry).

Alarms and Error Conditions

The KRYOS control tracks many different conditions in the freezer and therefore, has a full complement of alarms associated with these different conditions. As alarms occur, they cause an audible beep as well as a flashing red light. A remote alarm relay is also triggered following a user-designated period of time, after the error condition occurs, if it is not corrected. In addition, the error condition is displayed on the top line until the error condition is corrected. When an error does occur, the audible alarm may be muted by pressing the designated button. The audible alarm will then be silent until activated by a new error condition. The red light will continue to flash until all errors are corrected. The remote alarm will be activated if the power is interrupted.

The High Temperature Alarm for Thermocouple #1 can be set through the menu system (MENU, 3, 1). This alarm is activated if the temperature rises above the designated temperature. The alarm temperature can range from 0ºC to -190ºC. It can also be disabled.

The High Temperature Alarm for Thermocouple #2 can be set through the menu system (MENU, 3, 2). This alarm is activated if the temperature rises above the designated temperature. The alarm temperature can range from 0ºC to -190ºC and it can also be disabled.

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Contents Labs TW-357 REV E Installation Table of ContentsSafety Precautions for Liquid Nitrogen Extreme Cold Cover Eyes and Exposed SkinKeep Equipment Area Well Ventilated Liquid Nitrogen SystemFreight Damage Precautions Dispose of Waste Liquid Nitrogen SafelyElectrical General Information Text Format NotationLabs Cryostorage Specifications Kryos Specifications Installation Unpacking and InspectionLiquid Nitrogen Supply Connection Repackaging for ShipmentPower Supply Connection Kryos Control Field InstallationOperation Initial FillSensor Assembly Control ComponentsInterface Panel Lid Switch Battery BackupRemote Alarm Solenoid ValveLiquid Phase Storage Operating ParametersAdding an Inventory Control System Thermocouple PositioningRacks are not Square Orientation is Important Inventory Control System Layouts Labs Cryostorage SystemLABS-80K LABS-40K Fenwal 4R59953 Blood Bag Rack Arrangements Fenwal 4R5462 9955 Blood Bag Rack Arrangements Power Control OperationIntroduction Normal Fill CycleMain Display Screen Menu SystemHigh Temperature 4.1 Valve Open Temperature Thermocouple Select Calibrate TemperatureTest Temperature System Help ScreensAlarms and Error Conditions Sensor TypeSystem Alarms Test AlarmsLogging Error Logs Dump LogsTemperature Logs System LogsErase Logs SecurityLid Switch Setup Control By TemperatureTemperature Control Settings Control TemperatureSerial Communications and RS-232 Settings User Access LogsTime and Date Set Control Range Freeze-Guard OptionsValve Monitoring Valve Open DurationControl On Battery Backup Version Solenoid ValveDisplay Brightness About this ControlBattery Life Interface SoftwareMaintenance Strainer Cleaning InstructionsDefrosting Your LAB-Series CryoStorage System Cleaning Your Taylor-Wharton CryoStorage System Making Adjustments to the Labs Kryos Sensor Assembly Default Start Fill / Stop Fill Default Auto Defog Kryos Kryos V9.0 & Kryos V9.0B Level ReadingsOffset Value Units of measureRemoving/Installing the Solenoid Valve Ohms to 18 K ohmsSensor Plug Schematic Pin View SchematicsLabs Plumbing Assembly Plumbing AssemblyTroubleshooting SymptomsController Will Not Turn on Indicates High Liquid LevelTemperature reading 10 to 20 degrees warm Indicates Low LN2 SupplyIndicates Open Sensor Lid Open Alarm QCF Quick Chill Feature Will Not OperateFill Solenoid Cycles On and Off Fill Solenoid Makes Humming NoiseDefog Feature Will Not Operate Power Failure AlarmPush Buttons Will Not Respond Liquid Level Readout is IncorrectFactory Settings Replacement Parts Level Controller Electrical/Mechanical Parts80K/40K/20KTaylor-Wharton Technical Services. Phone 800-898-2657 Fax Harsco Corporation