GZX92F Insulation Resistance Meter Calibration Device

I. Overview

This instrument is developed and produced in accordance with documents such as JJG622-1997 Verification Regulation for Insulation Resistance Meters, JJG1005-2005 Verification Regulation for Electronic Insulation Resistance Meters, and JJG1072-2011 Verification Regulation for DC High-Voltage High-Value Resistors. The device features independent leakage terminals and grounding terminals. It can be used to calibrate various models of imported and domestic analog insulation resistance meters, digital insulation resistance meters, and insulation resistance testers, as well as serve as a DC standard high-value resistor. It has a long technical and mechanical lifespan.

Resistance measurement range: 100Ω to 1TΩ, with a fine adjustment resolution of 100Ω.

Voltage measurement range: 0 to 5kV. Capable of measuring the open-circuit voltage, median voltage, and peak voltage of insulation resistance meters.

1.1 Accuracy Class and Operating Voltage (Current) of the Resistance Output Section

II. Main Technical Parameters

1. Resistance Output (High-Voltage High-Resistance Box) Section

1.2 Adjustment Range: 100Ω to 1TΩ, fine adjustment resolution: 100Ω

1.3 Operating Environmental Conditions

1.3.1 Reference Temperature Range: 17℃ to 23℃

1.3.2 Nominal Operating Temperature Range: 15℃ to 25℃

1.3.3 Reference Humidity Range: 30% to 60%

1.3.4 Nominal Operating Humidity Range: 25% to 75%

1.4 Insulation Resistance:

The insulation resistance between the circuit of the resistance output section in the calibration device and any other external metal parts not electrically connected to the circuit shall be no less than 1GΩ when measured at the rated voltage.

1.5 Dielectric Strength:

The circuit of the resistance output section in the calibration device and the reference ground point for testing should withstand an actual sinusoidal AC voltage of 6.75kV at a frequency of 45–65Hz for 1 minute without breakdown or flashover.

1.6 The residual resistance at the output terminals of the resistance output section in the calibration device should be <1Ω, with a variation of <0.1Ω.

1.7 Dimensions: 442mm × 270mm × 145mm

1.8 Weight: <5kg

2. Voltage Measurement (High-Voltage DC Digital Voltmeter) Section

2.1 Measurement Range: 0 to 5500V DC

2.2 Accuracy: ±(1% of reading ± 0.2% of full scale)

2.3 Power Supply: 4.5V DC

2.4 Display: 4.5-digit LCD

2.5 Input Resistance: ≥10GΩ

2.6 The peak voltage measurement circuit meets the requirements of Figure 3 in JJG622-1997 Verification Regulation for Insulation Resistance Meters.