Initial Operation - Fluke 421D Technical Data Manual

Area of responsibility of other
manufacturers of accessories
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Other manufacturers of accessories for Fluke
411D are responsible for the development,
the realization and the communication of
safety concepts for their products and their
effects in combination with the Fluke
product.
Area of responsibility of the
operator
Caution
Damage to property due to repairing!
 In case of malfunctions, contact the retailer.
The operator is obliged to observe the following:
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He understands the protection information
on the device and the operating instruction.
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He is familiar with the customary in-house
accident control directives.
Overview
Keys
See drawing A:
1. laser emitter
2. receiver lens
3. display
4. on/measure
5. Subtraction
6. measuring plane/unit
7. clear/off
8. area/space volume/Pythagoras
9. Addition
Display
See drawing D:
10. measuring plane
11. area/space volume/Pythagoras
12. battery symbol
13. 2nd row
14. fractions/exponents
15. units
16. summary row
17. Addition/Subtraction

Initial operation

Insert the batteries
See drawing E:
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To ensure a reliable use, use exclusively
alkaline batteries.
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Remove battery compartment cover.
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Insert alkaline batteries (2 x AAA) observing
the polarity.
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Close the battery compartment cover.
Changing the batteries
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Change the batteries when the battery
symbol is blinking permanently.
How to use
Measuring conditions
The quality of the measurement depends on the
surfaces to which you are measuring.
Measurement errors
Caution
Damage to property due to use of wrong
measuring results!
 Avoid measuring errors due to unexpected events
during distance measuring.
 Perform a control measurement.
Measuring errors are possible in case of:
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colorless fluids (e.g. water)
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clean, translucent glass
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styrofoam or similar semi-translucent
surfaces
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strongly reflecting targets that deflect the
laserbeam
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measurements aimed at moving objects
Causes:
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Strongly reflecting targets deflect the laser
beam and cause measuring errors.
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Non-reflecting, dark surfaces increase the
measuring time.
For constantly high-quality
measurements
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Perform control measurements periodically.
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Perform control measurements before and
after important measurements.
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