American Weigh Scales (AWS) AL-311 - Manual (Page 4)

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AL-Series Manual
1. INTRODUCTION
This AL-Series balance is an electronic analytical/precision balance which uses the principles of
electromagnetic force restoration for high accuracy, and performance. The AL-Series features multiple
weighing units, parts counting, percent weighing, and much more. This balance is also equipped with
an RS232 data port for connection to a computer or printer. The AL-Series allows for a great deal of
customization making it perfect for fields such as pharmaceutical, education, corporate research, and many
others.
1.1. Scale Environment
Proper placement will help to ensure the most accurate and repeatable results from your balance.
The ideal location is in a corner, on a stable, vibration free bench, protected against drafts from doors,
windows, ac units, fans, etc. Many laboratories set precision and analytical balances on marble or granite
slabs or desks for maximum stability and anti-vibration.
• The recommended working temperature for Accuracy Class II devices is 68°F ±45.5°F(20°C ±7.5°C) with
a deviation of no more than 41°F/hour (5°C/hour).
• The recommended relative humidity for Accuracy Class II devices is 50-80%.
• The working voltage for the balance is 24V.
1.2. Safety Precautions
Do not operate the balance in hazardous environments. All outlets should be properly grounded for the
operators security.
The balance receives power as long as the AC cord is plugged into the socket, even when the display is off.
This is to keep the electronics warmed up and eliminate long start-up times. If you are not using the balance
for longer than five days, you should unplug it. Otherwise, simply turn off the display with the ON/OFF
button and turn it back on whenever you need it.