Megger DET14C, Быстрый старт

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These safety warnings are provided to ensure the safety of personnel and
proper operation of the instrument.
■
Safety warnings and precautions must be read and understood before
the DET14C / DET24C is used. They must be observed during use.
■
Do not leave the DET14C / DET24C connected to the system under
test when not in use.
■
Do not touch circuit connections and exposed metalwork of the
installation or equipment under test.
■
Do not use the DET14C / DET24C or connect it to any external system
if it shows any visible signs of damage, malfunction or if it has been
stored in unfavourable conditions.
■ Always keep body parts behind the tactile barrier on the handles of
the DET14C / DET24C.
■ Always inspect the DET14C / DET24C prior to every use. Replace any
defective parts immediately or return the instrument to an authorised
service centre for repair.
■
Do not use the DET14C / DET24C or connect it to any external system
if the casing is open or any parts of the case are missing.
■
Do not use rechargeable batteries in this instrument.
■ Always use caution when clamping the DET14C/DET24C on energised
electrical conductors.
■ Always use extreme caution when clamping around bare conductors:
under fault conditions, high voltages and currents may be present and
may pose a shock hazard.
■
The DET14C / DET24C are not suitable for measuring AC currents in
multicore cables or DC currents.
■
The instrument should not be used if any part of it is damaged.
■ This instrument is not intrinsically safe and must not be used in
hazardous atmospheres.
■ If this equipment is used in a manner not specified by the
manufacturer, the protection provided by the equipment may
be impaired.
■
Rechargeable batteries should not be used in this instrument.
■ Use extreme caution when using the instrument in proximity to bare
conductors. Avoid contact between the metal in the jaws and bare
conductors. A short circuit would create an arc-flash explosion hazard.
OPERATION PRECAUTIONS
■
It is important to keep the mating jaw surfaces clean as even small
amounts of contamination can cause measurement problems
■
It is important to not damage the mating jaw surfaces. Take care when
clamping around electrodes as scratches on the mating surfaces will
cause measurement problems
■
It is important to avoid impacts to the clamp head as any damage will
cause measurement problems
■
Damage including scratches to the mating jaw surfaces is considered
misuse and will invalidate the warranty
Measurements
Resistance
Range : 50 m
Ω
to 1500
Ω
Ground resistance measurement
R
eq
= (R1 || R2 || R3 …|| Rn)
R
loop
= Rg + Req
Current (I) induced by voltage (V) is therefore:
I = V/ (Rg + Req)
Measured value is Rg + Req.
Current
Range : 0.5 mA to 35 A
Insert batteries