1. Overview
The ground resistance meter is a safety instrument produced based on the principle of potential compensation. It is simple to operate and portable, and is widely used to measure the ground resistance of single grounding bodies and centralized grounding bodies. The measurement of ground resistance is an important measure to monitor the quality of grounding and ensure the safety of electricity.
The national calibration regulations for ground resistance meters are the calibration regulations for ground resistance meters.
DB ground resistance meter calibration device is a standard instrument for calibrating ground resistance meters. It fully meets the requirements for standard instruments and can calibrate analog and digital ground resistance meters of various accuracy levels and models. It shall not be used for the verification of ground conduction resistance meter (working current is). It can be used as a resistance box with a starting resistance of & and a resolution of &.
2. Main technical indicators
. Resistance output range.&~.&Minimum resolution: &.
. Analog ground resistance r (standard resistor) resistance value (&)
bz=
bz=
bz=
bz=
bz=< br/> bz=
bz=
Power, current
b
b
b
b
b
b
b
Accuracy (%)
b
b
b
b
b
b
b
. Simulate auxiliary ground resistance r, r (auxiliary ground resistance)
Resistance (&)
b
b
b
b
b
Accuracy (%)
b (＜.&)
b
b
b
b
Power
b r z=
r z=
z=+. Usage environment: Temperature ℃℃ Relative humidity %～%RH
. Weight ＜.
. Volume
JDB-2 ground resistance meter calibration device