GZX92A type insulation resistance meter calibration device

1. Overview
The insulation resistance meter (megohmmeter) is a national compulsory calibration measuring instrument and its calibration regulations are -. The main standards of the calibration device are high-voltage and high-resistance boxes and high-voltage voltmeters. The type insulation resistance meter calibration device integrates a high-voltage high-resistance box (high-resistance output part) and a high-voltage digital voltmeter (voltage input part) into one.
The upper limit of measurement of the resistance output part of the calibration device is the nominal operating voltage. The device is designed with independent leakage shielding terminals and grounding terminals, so there is no obvious instability, short circuit or open circuit during the measurement process. Meet the requirements of the Insulation Resistance Meter Verification Regulations and the DC Resistor Verification Regulations. It can be used for the verification of various types of pointer insulation resistance meters.
The resistance output part of the calibration device uses a patented rolling high-voltage switch that can still meet the requirements of the calibration regulations after being used 10,000 times. It has a long technical life and mechanical life. The nominal measurement voltage of the voltage measurement part of the calibration device is the input impedance. This device can measure the open circuit voltage, median voltage and peak voltage of the megger.
2. Main technical parameters
. Resistance output (high voltage and high resistance box) part
. Accuracy level and working voltage (current) of the resistance output part
<= dd resistance






Accuracy level




.
.
Nominal voltage






<= dd resistance




Accuracy level
.
.
.
.
Nominal current




. Adjustment range: ~Adjustment fineness is
. Use environmental conditions
.. Reference temperature range: ~℃< r >
.. Nominal operating temperature range: ~℃
.. Reference Humidity range: ~%
.. Nominal operating humidity range: ~%
. Resistance variation limit: variation caused by changes in a single influencing quantity under reference conditions
<= dd Influence quantity classification
Nominal use range
Allowable variation
Ambient temperature
～℃
/ %
Relative humidity
%～ %
/ % %
Working voltage
(~/) Nominal voltage
/ % %
★ It is the resistance output part of the calibration device Resistance disk accuracy level (each resistance disk has different values)
. Insulation resistance: The insulation resistance between the circuit of the resistance output part of the calibration device and any other external metal that is not electrically connected to the circuit is measured at the nominal voltage. The resistance value is not less than.
. Insulation strength: The circuit between the resistance output part of the calibration device and the reference ground point for testing should be able to withstand an actual sinusoidal AC voltage with a frequency of ~ and last for a long time without breakdown or arcing. Phenomenon.
. The residual resistance at the output end of the resistance output part of the calibration device should be <.its deterioration<.
. Dimensions:
. Weight: <
. Voltage measurement (high voltage DC digital voltmeter) part
. Measuring range: ~
. Accuracy: (% reading digits)
. Power supply: D
. Input resistance:
. Display: four and a half digits, liquid crystal display
. The peak voltage measurement circuit meets the requirements of the figure in the Insulation Resistance Meter Verification Regulations.