Pointer material: Nickel silver strips

Pointer color: black

Pointer swing direction: from left to right

Pointer length: 17.3 ± 1 mm from the central axis to the needle end

Pointer width: 0.45 ± 0.05 mm

Electric meter use direction: vertical

 

1. Standard test conditions: temperature 20℃, humidity 70%, when there is no difference in test results,

It can also be tested at room temperature and humidity

2.Voltage sensitivity: the pointer is at the zero scale to the maximum scale (full scale position), the sensitivity is 1.2V ± 10%

3.Internal impedance: 4.56K Ω ± 10%

4. Insulation resistance: 500V DC plus 50M ohm or more for the outer box of the meter and the electrical circuit. The insulation resistance of the meter housing and the electrical circuit is tested with a 500V DC voltage.

5. Zero position The meter uses the standard posture, and the place where the front end of the pointer and the center of the zero scale are combined is the reference pointer and the zero scale overlap. The allowable error is ±1mm

6. Balance: the allowable error range of the meter is ±1mm when the standard position is tilted forward and backward by 90 degrees

7. Pointer sticking: Instantly add the full-scale current three times the overcurrent, and slowly decrease to the reading of the current sensitivity 1/2, at this time the pointer will return to the scale of the scale board 1/3 range

8.Friction: When adding current to the meter and slowly increasing or decreasing to a certain value, the error range of the indication point is ±1mm

9. Braking: Instantly add 2/3 of the current value of the scale plate, and the time required from the beginning to the pointer indicating position is within one second

 

1. Overload test: input ten times the full scale current every five seconds, and this action is repeated nine times. Each time 0.5 seconds after this test 7-14 items remain normal

2. Vibration test: After the meter is packaged, it performs 1,000 up and down 4mm vibrations per minute on the vibrating plate, 10 minutes in each direction. After this test, the 7-14 items remain normal

3.Impact test: After the meter is packaged, it is dropped from a height of 30 cm on a 3cm thick wooden board, X.Y.Z. three-direction test. After this test, the 7-14 items remain normal

4. Reliability test: After 100,000 calibration point current input, the current sensitivity limit is still within the standard

5. Environmental impact test: temperature 50℃, humidity 85%, lasting 100 hours, after this test 7-14 items remain normal

6.Terminal tension test: the terminal must withstand 1 kg of tension and will not be affected for 60 seconds

 

1. Operating temperature limit －10℃ to＋60℃ RH 35 to 85%

2. Storage temperature limit -20℃ to＋60℃ RH 35 to 85%

Do not place the meter under direct sunlight, and store the meter in the packaging box to prevent foreign objects from entering the interior of the meter

3. Soldering condition: put the terminal about 3 mm into the tin plate at 230℃ for 3.5 seconds

After this test, 7-14 items remain normal

Soldering temperature: Hold the solder gun at 350℃, touch the terminal for 3.5 seconds, and the tip of the terminal is about 3mm in contact with the solder gun

After this test, 7-14 items remain normal

4. Anti-static use dry nylon cloth to test three times in the same direction on the surface of the transparent cover, and the difference of the pointer on the scale is at the length of the scale.

Below 1/3, return to zero position after three seconds

5. Bulb specification: yellow neon bulb 12V 55mA