Purpose and scope of application:
ZC-8 grounding resistance is suitable for directly measuring the grounding resistance values of various grounding devices, and can also be used for general low resistance measurements. The four terminal knob (0-1-10-100 Ω specification) can also measure soil resistivity.

The main specifications and ranges are shown in the table below:

1. This product complies with the definitions and general requirements of GB7676-98 direct acting analog indicating electrical measuring instruments and accessories, as well as the relevant provisions of ZBN21012 grounding resistance meter professional standards.
The reference value of the instrument is the range.
The basic error of the instrument is expressed as a percentage of the reference value, and the limit of its basic error is ± 3% of the measuring range.
4. The working environment temperature of the instrument is -20 to+50 ℃.
5. The indication value of the instrument changes due to temperature changes, and the conversion to every 10 ℃ change shall not exceed the basic error.
6. The working environment humidity of the instrument is 25% to 95%, and the change in the indicated value caused by this is not greater than the basic error.
7. The working position of the instrument is horizontal.
8. The instrument tilts 5 ° in any direction from its horizontal working position, causing a change in the indicated value that is not greater than 1/2 of the basic error.
Under the influence of an external magnetic field strength of 0.4KA/m, the change in the indicated value caused by the instrument shall not exceed 1.5% of the reference value.
10. The insulation resistance between the instrument circuit and the casing shall not be less than 20M Ω.
The voltage test for the instrument circuit and casing is 500V.
The protective performance of the instrument casing is splash proof.
When the grounding resistance of the auxiliary detection pin is not greater than the specified value in the table below, it has no effect on the measurement.
14. The rated speed of the instrument generator handle is 120r/min.