Seaward DO4000 - Manual (Page 5)

Operating Instructions Digital Ohmmeter DO4000 Series
3
IMPORTANT NOTE
Instruments are delivered ready for immediate use; no extras are required.
Supplied Accessories: One set of test leads
One set non rechargeable batteries
One copy of Operating Instructions (English)
When unpacked, inspect for physical damage and report any defects immediately
in writing, retaining packaging materials for inspection.
1. Safety
Digital Ohmmeter type D04000, 4001 and 4002 comply with EN61010-1
EMC - EN61236
This apparatus has been designed and tested in accordance with EN61010-1,
Safety Requirements for Electronic Measuring Apparatus, and has been supplied
in a safe condition. The present instruction manual contains some information and
warnings that have to be followed by the user to ensure safe operation and to
retain the apparatus in safe condition.
WARNING!
The apparatus shall be disconnected from all voltage sources before it is opened
for any adjustment, replacement maintenance or repair.
Any adjustment, maintenance and repair of the opened apparatus under voltage
shall be avoided and carried out only by a skilled person
Make sure that only fuses with the required rate current and of the specified type
are used for replacement. The use of makeshift fuses and the short-circuiting of
fuse holders are prohibited.
Whenever it is likely that the protection has been impaired, the apparatus shall be
made inoperative and be secured against any unintended operation and returned
to our factory or Agent for rectification.
2. Introduction
The DO4000 and 4001 are accurate hand/portable digital milliohmmeters for the
measurement of resistance in the range 10µ
Ω to 4000Ω. The DO4002 is an
accurate hand/portable digital milliohmmeter in the range of 1µ Ω to 400Ω. They
employ the four terminal resistance measurement method to eliminate the effect
of lead resistance errors. The measured values are displayed on a 4-digit LCD
display; an overflow of the selected range is also indicated.
Display range 4000
Simple push button selection of the range required plus and auto range feature
ensures the ohmmeters may be easily used by unskilled personnel, error and
status warnings are illuminated when appropriate. The utmost care has been used
to ensure that the ohmmeters will withstand accidental mains voltage applied to
the measuring terminals, but it is not recommended that voltage should be
applied.