PT200MI instruction manual 1
1. DESCRIPTION
1.1 INTRODUCTION
The PT200MI is a general weighing indicator, employing the latest technology for reliability, best
performance, quality assurance and cost effective design which includes many functions. The PT200MI
is suitable for all kinds of applications such as hopper and platform weighing.
1.2 DEFINITIONS
Multiplier:
The multiplier determines the position of the decimal point or the number of tailing zeros added to the
internal count or reading.
For example:
If the internal reading is 234,
Multiplier Display on indicator
10 2340
1 234
.1 23.4
.01 2.34
.001 .234
.0001 .0234
Division:
The ratio of step width to multiplier. The value of the division can only be one of the following: 1, 2, 5.
The external count increments by the division.
Step width:
The difference between two consecutive readings of the scale.
Excitation voltage:
The voltage that is supplied by the indicator to the load cell.
Load cell:
Load cell is a device that converts force to electronic voltage. A load cell consists of two parts. The first
part is a sensor that can be linearly distorted according to the force applied to it. The second part is the
strain gauge element which changes its resistance according to the distortion of the sensor.
Load cell rated output:
The output voltage from the load cell divided by the excitation voltage at load cell rated capacity. This is
usually expressed in mV/V.
Maximum capacity:
The maximum figure, ignoring decimal point, that the indicator will be calibrated to display.
Resolution:
The ratio of the maximum capacity times multiplier to division. This is usually expressed in divisions or
counts.
Dead weight:
Dead weight is the self weight of the platform or scale load carrying structure on the load cells without
the contents or items to be weighed. The output voltage of the load cell in response to the weight of the
platform is usually the zero offset.
Live weight :
The weight that is applied to the scale and shown on the indicator.
Span:
The change of reading from the indicator in response to the change of standard
weight applied. Full span is the change when full load or maximum capacity is applied.
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