Checkline Series-3I - Manual (Page 4)

Model 3i Digital Force/Torque Indicator User’s Guide
3
Example 1
Model MR50-50Z sensor with Model M3i Indicator
MR50-50Z
±0.35% of full scale +
M3i
±0.2% of full scale
±1 digit
=
Total
±0.55% of full scale
±1 digit
This translates into a fixed error of up to:
0.55% x 50 ozFin = 0.275 ozFin + 0.02 ozFin = 0.295 ozFin
Example 2
Model MR01-100 sensor with Model M5i Indicator
MR01-100
±0.15% of full scale +
M5i
±0.1% of full scale
±1 digit
=
Total
±0.25% of full scale
±1 digit
This translates into a fixed error of up to:
0.25% x 100 lbF = 0.25 lbF + 0.05 lbF = 0.30 lbF
Because accuracy is defined as a percentage of full scale, the fixed error is possible anywhere on the
scale from 0 to the capacity. As such, this value represents an increasingly large error as percentage of
reading towards the low end of the scale. It is, therefore, recommended that a sensor is selected with
capacity as close as possible to the expected load.
1.4 Safety / Proper Usage
Read through the following safety instructions thoroughly before using the 3i with a sensor:
1. Note the sensor’s capacity before use and ensure that the capacity is not exceeded. Producing a
load greater than the indicated safe overload value can damage the sensor. An overload
can occur whether the sensor’s indicator is powered on or off.
2. In order to extend the life of the sensor, avoid repetitive shock and impact loading.
3. When moving the sensor to another location, never lift from the cable or strain relief. This can
cause damage to the sensor. Always lift the sensor housing itself.
4. Always ensure that load is applied axially with respect to the sensor.
5. Ensure that the sensor is kept away from water or any other electrically conductive liquids at all
times.
6. The sensor and indicator should be serviced by a trained technician only. AC power must be
disconnected and the indicator must be powered off before the housing is opened.
7. Always consider the characteristics of the sample being tested before initiating a test. A risk
assessment should be carried out beforehand to ensure that all safety measures have been
addressed and implemented.
8. Typical materials able to be tested include many manufactured items, such as springs, electronic
components, fasteners, caps, films, mechanical assemblies, and many others. Items that should
not be used with the sensor include potentially flammable substances or products, items that can
shatter in an unsafe manner, and any other components that can present an exceedingly
hazardous situation when acted upon by a force. Always wear eye and face protection when