Labconco FreeZone Triad 74000 Series User Manual

Contents

Labconco FreeZone Triad 74000 Series User Manual Manual pdf 22 page image

Chapter 4: Operating InstructionsProduct Service 816-333-8811 or 1-800-522-765818Manual Control OperationThe manual operation has three selectable modes: Pre-Freeze, In-Flask andcontrolled shelf temperature. The Pre-Freeze setting allows the shelftemperature to freeze samples below –55°C obtaining “Max Cold”temperature of approximately –75°C. The In-Flask setting is used to freezedry pre-frozen samples when using only the sample valves on the left side ofthe unit. There is no shelf temperature control in this mode. When using thecontrolled shelf set point temperature setting, the shelf temperature willmaintain the set point selected between –55°C to 50°C. This mode should beused when freeze drying samples on the shelf. A flask can also be added tothe sample valves in this mode.(1) Turn the Power Switch ON. The display will become active.(2) Push the DISPLAY button until the MANUAL indicator lights.This will cause the manual display screen to be shown with thepreviously entered set point temperature or operational mode.The temperature units are displayed in the units (°F or °C)selected in the Set Up.The temperature may be set to control the shelf anywhere from+50°C to –55°C in 1°C increments. To pre-freeze samples below–55°C set temperature to “Pre-Freeze.” To freeze dry samplesusing the manifold sample valves change set point temperature to:“In-flask.”(3) If the set point or operating mode needs to be changed, press theINCREASE or DECREASE button until the desired set pointtemperature or mode is displayed.(4) Press ENTER. If ENTER is not pressed within 10 seconds, the setpoint will revert to the previously entered parameter.(5) Press MODE button until the manual indicator lights.(6) Press RUN/STOP button. The RUN/STOP indicator will lightand the refrigeration system and/or heater will operate.(7) If vacuum is required press VAC Button. Do not run vacuum withunfrozen samples in chamber.(8) To change the set point temperature in the middle of a run, repeatsteps 2, 3 and 4. The system will adjust to the new temperatureset point.(9) To monitor system operation, press DISPLAY until the Monitorindicator lights. The display will simultaneously show shelf(SHLF) temperature, collector (COL) temperature and the sample(SAMP) temperature. If the sample probe is not plugged into itsjack, the SAMP temperature display will show “- - -”. If in thePre-freeze mode the (COL) display will show“- - -”. If in the In-flask mode the (SHLF) the display will show“- - -”.SET POINT TEMP –30°C