Taylor TW-357 manual System Alarms, Test Alarms, Logging

Page 25

TW-357 REV E

System Alarms

The Low LN2 Supply Alarm can be set through the menu system (MENU, 3, 3, 1). This alarm is activated if the solenoid valve is not closed within a designated time period after a fill starts. The solenoid valve can be closed either automatically (the LN2 level reaches the STOP FILL sensor) or manually (the stop fill button is pressed) to stop the timer which activates this alarm. The possible choices for this alarm are None, 15, 30, 45, 60 minutes, 2 or 3 hours. This alarm does not correct itself until the fill is stopped (the solenoid closes).

The Sensor Error Alarm can be set through the menu system (MENU, 3, 3, 2). This alarm is activated if the control detects a sensor error such as an open sensor. The possible choices are ENABLE or DISABLE. An open sensor can be confirmed through the TEST LEVEL SENSORS option in the menu system (MENU, 2,1).

The Remote Alarm Timer can be set through the menu system (MENU, 3, 3, 3). This is the amount of time allowed to pass before the remote alarm relay is triggered if an error condition is not corrected. The possible choices are None, Immediate, 30 minutes, 60 minutes or 2 hours.

The Lid Open Too Long Alarm can be set through the menu system (MENU, 3, 3, 4). This is the amount of time the lid can be open before it triggers an alarm condition. The possible choices are None, 1, 2, 5 or 10 minutes.

The Thermocouple Alarm can be set through the menu system (MENU, 3, 3, 5). This alarm is activated if either thermocouple experiences an open circuit. The possible choices are ENABLE or DISABLE.

Test Alarms

The audible, visual and remote alarms can be tested at any time by the user through the menu system (MENU, 3, 4). Follow the instructions on the display to hear the audible “chirping” indicator of an alarm or to see the red LED flash or to trigger an immediate relay closure of the remote alarm.

Logging

The on board memory logging function is one of the most powerful and useful features of the KRYOS control. It provides a historical record for not only your freezer but also a complete record of the environment in which specimens were stored. Four separate logs are kept in the control:

1.System log – System logs are events that occur in the system such as lid opening/closing, LN2 filling Quick-Chill, Defog, etc.

2.Error log - Error logs are off-normal conditions detected by the system.

3.Temperature #1 log and Temperature #2 log - The two temperature logs are simply records of the temperatures recorded by the two thermocouples in the system.

The system and the error log each hold 4096 events while the combined temperature logs hold an additional 32,765 temperature events. All the logs are kept in non-volatile memory, meaning that the information is saved regardless of whether the control has power.

When an event (system, error or temperature) occurs, the control does two things with the data:

1.It enters the beginning or the conclusion of an event in the internal memory of the controller.

2.It sends the event data out the serial port of the freezer.

25

Image 25
Contents Labs TW-357 REV E Table of Contents InstallationExtreme Cold Cover Eyes and Exposed Skin Safety Precautions for Liquid NitrogenKeep Equipment Area Well Ventilated Liquid Nitrogen SystemDispose of Waste Liquid Nitrogen Safely Freight Damage PrecautionsElectrical Text Format Notation General InformationLabs Cryostorage Specifications Kryos Specifications Unpacking and Inspection InstallationLiquid Nitrogen Supply Connection Repackaging for ShipmentKryos Control Field Installation Power Supply ConnectionInitial Fill OperationControl Components Sensor AssemblyInterface Panel Battery Backup Lid SwitchRemote Alarm Solenoid ValveOperating Parameters Liquid Phase StorageThermocouple Positioning Adding an Inventory Control SystemInventory Control System Layouts Labs Cryostorage System Racks are not Square Orientation is ImportantLABS-80K LABS-40K Fenwal 4R59953 Blood Bag Rack Arrangements Fenwal 4R5462 9955 Blood Bag Rack Arrangements Control Operation PowerIntroduction Normal Fill CycleMenu System Main Display ScreenHigh Temperature 4.1 Valve Open Calibrate Temperature Temperature Thermocouple SelectTest Temperature System Help ScreensSensor Type Alarms and Error ConditionsTest Alarms System AlarmsLogging Dump Logs Error LogsSystem Logs Temperature LogsErase Logs SecurityControl By Temperature Lid Switch SetupTemperature Control Settings Control TemperatureUser Access Logs Serial Communications and RS-232 SettingsTime and Date Set Freeze-Guard Options Control RangeValve Monitoring Valve Open DurationSolenoid Valve Control On Battery Backup VersionDisplay Brightness About this ControlInterface Software Battery LifeStrainer Cleaning Instructions MaintenanceDefrosting Your LAB-Series CryoStorage System Cleaning Your Taylor-Wharton CryoStorage System Making Adjustments to the Labs Kryos Sensor Assembly Kryos Kryos V9.0 & Kryos V9.0B Level Readings Default Start Fill / Stop Fill Default Auto DefogOffset Value Units of measureOhms to 18 K ohms Removing/Installing the Solenoid ValvePin View Schematics Sensor Plug SchematicPlumbing Assembly Labs Plumbing AssemblySymptoms TroubleshootingController Will Not Turn on Indicates High Liquid LevelIndicates Low LN2 Supply Temperature reading 10 to 20 degrees warmIndicates Open Sensor QCF Quick Chill Feature Will Not Operate Lid Open AlarmFill Solenoid Cycles On and Off Fill Solenoid Makes Humming NoisePower Failure Alarm Defog Feature Will Not OperatePush Buttons Will Not Respond Liquid Level Readout is IncorrectFactory Settings Level Controller Electrical/Mechanical Parts80K/40K/20K Replacement PartsTaylor-Wharton Technical Services. Phone 800-898-2657 Fax Harsco Corporation