TA I
NSTRUMENTS
TGA 2050 4–7
The balance arm sensor is a printed circuit
board assembly that detects the null position of
the meter movement. The balance beam sensor
is mounted above the balance arm. It is used in
conjunction with the analog circuitry to maintain
a null position.
The TGA has two hang-down wire assemblies:
one for the tare pan and one for the sample pan.
Each assembly consists of a hang-down wire and
loop. The hang-down wire has hooks at each end
and connects the pan to the loop. The loop has
eyelets at each end; it is used to connect the
hang-down wire to the balance arm. The longer
hang-down wire (4 inches) is for the sample pan.
Sample pans are available in platinum in 50 and
100 µL sizes, alumina ceramic in 100, 250, and
500 µL sizes, and aluminum in 100 µL size. All
pans are 0.4 inch in diameter.
The tare pan holds the counterbalance weight
that mechanically subtracts out the weight of the
sample pan.
Description of the TGA 2050
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