Product Details

1、 Product introduction

DY-BZ lightning protection special standard resistance consists of 9 1/2W high-precision military grade wire wound resistance series. It is convenient to change gears directly when calibrating the instrument without changing wires. The highest accuracy can reach 0.05%. It has good long-term stability. It is a standard resistance specially customized by our company. Its resistance values include 1m Ω, 10m Ω, 100m Ω, 1 Ω, 10 Ω, 100 Ω, 1K Ω, 10K Ω, 100K Ω, It fully meets the 10-3~105 range specified in the Administrative Measures for Testing Qualification of Lightning Protection Devices (Order 31). It is mainly used for the calibration of grounding resistance tester, equipotential tester and other instruments.

2、 Range accuracy

model	Precision (%)	temperature coefficient（ppm）
0.001Ω	2	±25
0.01Ω	0.5
0.1Ω	0.2
1.0Ω	0.2
10Ω	0.05
100Ω	0.05
1KΩ	0.05
10KΩ	0.05
100KΩ	0.1

Reference condition: 23 ℃± 1 ℃ 50 ～ 60% RH

3、 Technical specifications

Function	Used for calibration of grounding resistance tester, equipotential tester and other instruments
Range	1mΩ，10mΩ，100mΩ，1Ω，10Ω，100Ω，1KΩ，10KΩ，100KΩ
wiring method	Four line method
Power	1/2W
temperature coefficient	±25ppm
Dimensions	Length, width and thickness:18711948mm
Test line length	Two red 0.5m and two black 0.5m
Quality	about550g
Operating temperature and humidity	-10℃～40℃；Below 70% rh
Storage temperature and humidity	-20℃～60℃；Below 80% rh
insulation resistance	Above 10M Ω (500V between circuit and shell)
Withstand voltage	AC 3700V/rms (between circuit and housing)
Suitable for safety regulations	IEC61010-1、CAT Ⅲ 600V、Pollution level, JJG166-1993 Verification Regulation of DC Resistors