DQJ-1 type DC single-arm bridge calibration device

The DC single bridge calibration device is produced in accordance with the DC Resistor Box Calibration Regulations and the DC Bridge Calibration Regulations and is used for overall calibration of the portable single bridge. There are ten resistor disks with ten steps. The measurement upper limit is the minimum step voltage that can cover all the measurement limits of the portable single bridge and has the minimum resolution requirement for the calibration bridge. This device has different accuracy according to different measuring ranges of the bridge, so (decade resistance disk) has different accuracy.
, main technical indicators
. Accuracy of measuring disk power or current
<= dd decimal resistance disk





Accuracy (%)





Power Rate

<= dd decade resistance disk


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.
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Accuracy (%)





Power or current




. Residual resistance
.% is It is convenient to calculate the residual resistance value as the first indication value of the decade resistance disk.
. Usage environment
Ambient temperature ℃℃ Relative humidity %～%
. Insulation resistance
The resistance between the circuit of the device and any other external metal or components that are not electrically connected to the circuit for.
. Power frequency withstand voltage
The circuit between the device and the reference ground terminal for testing can withstand the actual sinusoidal AC voltage with frequency (~) and voltage for a duration of test without breakdown or arcing.
. Volume weight
, Precautions
. Before use, rotate each decade resistance disk three times within the maximum range and wait for a while until the heat balance during the rotation reduces the influence of thermoelectric potential.
. The residual resistance value is the indicated value of the decimal resistance disk. In other words, there is no position on the decimal resistance disk. . Try to use measuring wires with thicker diameter and made of copper.