LW Measurements HRB 224 Magnetic Force Balance - Manual (Page 10)

Operation
Basic weighing function
Purpose
The basic weighing function can be used alone or in combination with an application
program(counting, weighing in percent, etc.).
Features
í Taring the balance
í Printing weights
Before using the balance at the first time, calibrate and adjust it at the place of use; For
details, see “Calibration and Adjustment” in the next chapter.
Ƞ The temperature range
( )
indicated on the verification label may not be exceeded during
operation.
Working with HRB-120.4,HRB-220.4,HRB-220.3, HRB-320.4,HRB-420.4,HRB-520.3,
HRB-620.3 Models:
Working with the microbalance requires a steady hand and a smooth, uninterrupted technique.
Use forceps or other suitable utensil to place the sample on the weighing pan.
Perform a number of test measurements before you begin weighing, to allow the temperature
inside the weighing chamber to adjust to the ambient temperature outside the chamber.
Otherwise, if the chamber door was closed for a longer period of time prior to beginning
weighing, the sudden change in temperature inside the chamber when you open the door
might affect the weighing result. This is why a series of test measurements is recommended;
the repeated opening and closing of the weighing chamber door, at the same rate of speed
as well be used during the actual weighing sequence, will both compensate this difference
in temperature to some extent and help you develop a smooth working rhythm.
Place the sample gently on the weighing pan. The weight result should stabilize within 3 to
5 seconds. The degree of precision attained increases in proportion as the weighing operations
become more consistent.
Preparation
Blank display indicates that the balance was disconnected from power. For example, the
first time the balances is put into operation, or after a power outage.
Switch on the balance: Press
All symbols on the display light up briefly.
Ƞ When you turn on the balance, the symbol is display until the balance is ready to work.If
the symbol is displayed during operation, this indicate that the processor is performing a
function and cannot receive further commands at the moment.
Taring the balance press TARE key
Additional Functions
Switching off the balance: Press
A circle in the lower left-hand corner of the display indicates that the balance has been
switched off and is in stand-by mode.
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