ACL 300B Operation Manual
Rev. 6/9/10 KCB
Page 2 of 5
FEATURES
• Convenient pocket-size
• Lightweight
• Excellent reproducibility of readings
• Standard 9-volt battery included
• Long battery life
• Multiple ranges
• Low drift
• Accuracy ± 10% of full scale at ½” spacing
• Battery Test switch
• Option carrying case available (part# CS13)
INTRODUCTION
The ACL 300B is a high-quality, portable, non-contact voltage meter. When used properly, it will
consistently produce accurate readings with ease and will provide years of trouble-free operation.
This meter’s accuracy is dependent upon three factors:
1. The instrument must be properly zeroed.
2. The distance between the surface of the sensitive electrode and the target or surface under
examination must be accurately defined.
3. The target must be large relative to the sensitive electrode. (We refer to these relative sizes in
our “Field of View” graph as “Aspect Ratio.”)
OPERATION
1. Test meter before using, following instructions on p. 3 of this manual.
2. Turn the meter on by pushing the red power/range selector switch is into the LO or the HI position.
3. Discharge static electricity from your body by touching a grounded metal object, such as a water
pipe, a metal electrical conduit, grounded machinery or a workbench.
4. Zero the instrument. This can be done in two ways:
a. Point the instrument away from charged objects. Press the black ZERO switch twice and
release. The switch will return to the READ position.
b. Point the instrument toward a known grounded surface. Press the black ZERO switch twice and
release. The switch will return to the READ position.
5. Point the meter’s electrode toward target and move to a distance of either 4” or ½”. Note the
reading on appropriate meter scale.
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