Megohmmeter calibration procedure

Megohmmeter is a commonly used measuring instrument and has a certain application in many fields. Among them, the megohmmeter needs to be calibrated during the use, so that the measurement accuracy is higher. What is the calibration procedure for megohmmeters? The following Xiao Bian will introduce it in detail.

1. The impedance bridge has a precision of 1% in the range of 10 3 to 10 12 . Relative Humidity Hygrometer High Accuracy Thermometer

2. Open the cover and be careful not to damage the two wires connecting the power switch on the circuit board.

3. Find the three correction regulators 4 at the bottom right of the circuit board so that the meter is at least 1/2 hour under this environmental condition. The test can be started only after self-balancing.

5, using the ACL-800 table comes with one end of the connection cable connected to the alligator clip, the other end of the banana plug.

6. Insert a 3.5 mm long plug into the socket of the watch.

7. Use an alligator clip to connect the two ends of the resistor.

8, three correction regulators, the top of the "humidity" measurement, the middle of the "impedance", the bottom of the "temperature adjustment with a small screwdriver." The clockwise direction is adjusted for increasing value and the counterclockwise direction is adjusted for decreasing value.

9, press the power switch, while comparing the "temperature", "humidity" and "resistance" value.

10. Release the power switch and slowly adjust the corresponding adjustment regulator.

11. Press the power switch again to observe the LCD display.

12. If you need to recalibrate, press the power switch again and adjust the corrector.

13. Close the cover and tighten the four captive screws.

14, press the power switch to determine whether the table is working properly.