ULTRALOW-TEMPERATURE FREEZERS continued


Table 1 – ULT freezer purchasing considerations Capacity: How many samples can the ULT freezer hold?


Orientation and footprint: Upright or chest freezer, and how much floor space does it require?


Upfront cost: What is the purchase price?


Energy usage: What will it cost to run the unit over its lifetime?


Pulldown: How fast can it reach its set- point from ambient temperature?


Recovery: How quickly will it return to set- point after the door has been opened?


Stability: How well does it maintain a temperature in steady-state operation?


Security: Is there an alarm, and how will it be monitored? Is there a physical backup system such as CO2


or LN2 Figure 1 – Revco upright ULT freezer from Thermo Fisher Scientific. LIVE WEBINAR


Eliminating the Problem of Inaccurate Precision Weighing Measurements Caused by Static Charge


When using an analytical balance, obtaining precise measurements is of the utmost importance. Even a small static charge on samples, sample containers, weigh-boats, and on the interior surface of the weigh chamber can cause zeroing errors and significant measurement errors. Implementing a robust static control program will eliminate these adverse effects and dramatically improve measurement accuracy.


In this webinar you will learn: • What is Static Electric charge and how it is generated. • How static electric charges affect measuring accuracy. • How to create a static-free environment to assure accurate measurements.


Wednesday, April 29, 2015 2:00 PM EDT


REGISTER at http://bit.ly/1FOYKq0 SPEAKER


Greg Gumkowski National Sales Manager NRD - Advanced Static


Greg Gumkowski has worked in the Static Control market for more than 13 years. He has technical degrees in Material Science and Engineering Metallurgy. He is a member of the ESD Association and is an iNARTE certi- fied ESD Technician.


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AMERICAN LABORATORY • 40 • MARCH 2015


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