Megger Megger DET14C Quickstart

DET14C & DET24C
Quick Start Guide
M
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
Insert batteries
Measurements
Resistance
Range : 50 mΩ to 1500 Ω
Current
Range : 0.5 mA to 35 A
Ground resistance measurement
R
= (R1 || R2 || R3 …|| Rn)
eq
R
= Rg + Req
loop
Current (I) induced by voltage (V) is therefore:
I = V/ (Rg + Req)
Measured value is Rg + Req.
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