Qiaopu's power cord DC double bridge procedures

The order applies to Ningbo Qiaopu Electric Co., Ltd. DC double bridge measuring 0.01 micro-ohms to 1111.1 European metal conductor DC resistance.
First, the preparatory work:
An appropriate length required to intercept the sample, usually less than 1.1m.
2 with the conductor under test does not hurt the way, remove the sample measurements and other parts of the insulation cover, exposing the metal conductor.
3 samples before the measurement, the connection part should be clean.
4 selector switch inside and outside the home and power meter means zero options open on the inside and outside the "G and B within the 'Locations. 5 samples and bridge placed in the test environment long enough, so as to achieve temperature equilibrium.
6 before the test to check the bridge's four columns are connected between the connection terminal fixture resistance is good contact.
Second, the operating procedures
1 to clamp the resistance of the conductor under test fixture and check the resistance of the conductor clamping jaws and contact is good.
2 manual zero, so that means zero.
3 ratio disc go to the "BV" position and "B" twist, check supply voltage is adequate.
4 rotary electrical magnification ratio to an arbitrary zero knob, so that means zero meter pointer zero position, and set sufficient sensitivity knob rotation in position.
5 the measured resistance measurements.
(1) readings plate adjustment: can be the first and second readings the main dish on the measured resistance value of the approximate location of the reading, as I do not know the measured resistance value can be set to first measure the maximum resistance reading readings, the tenth of each reading disk file indication is X (pick up) sign, which is to facilitate the recording of data, calculations show that the value for the "0", and thus a bit to the front plus the number "1."
(2) reading the measured resistance value: Press "B" twist, turn the plate readings, so that means zero meter pointer to zero, the readings show the value of the plate and then multiplied by the rate indication, is to be measured conductor resistance, attention should be sufficient to enable determination of the value of the effective number of bits, the first reading should not be set to zero.
(3) bridge balance adjustment: the zero mean measurement instrument sensitivity according to the needs of successive clockwise to adjust from low to high.
(4) selection ratio: the ratio of the resistance selector dial to the desired range, as I do not know the general resistance of the measured resistance should be selected 103 magnification.
(5) with the completion of the bridge, the rate should be set to "off" position, cutting off the power bridge
Amount of conductor length (m).
Third, note
1 measuring ambient temperature, the thermometer should be off the ground at least 1m, from the sample should not exceed 1m, but they are basically the same height requirements.
2 resistance measurement, should first press the "B", then press the "G" twisted, disconnected, disconnect the "G" twist, and then disconnect the "B" twist.
The following 3 0.1Ω resistance measurement, "B" twist should be used intermittently.
4 bridge when not long, the battery should be removed.
5 instrument should be placed horizontally, ventilated, clean, and should avoid direct sunlight and intense vibration at the sun dry storage.
6 should power off the instrument test is completed, the instrument clean.