Description

Specifications

project instruction

Appearance agency

1 Moving part Moving coil type

2 Appearance dimensions See P-97 for details

3 degree plate See P-97 for details

4-Hand Material Nickel silver strips

Pointer color orange

Hand swing direction Left to right

Pointer length From the center axis to the needle end 54±1 mm

Hand width 0.45 ± 0.05 mm

5 Direction of use of the meter Vertical

Electrical performance

6 Standard test conditions Temperature 20°C, humidity 70%, if there is no difference in test results, the test can also be carried out at normal temperature and humidity

7 Current sensitivity Pointer at zero scale to maximum scale (full scale position) Sensitivity 1000 uA ± 10 %

8 Internal impedance 100Ω±10%

9 Insulation resistance The outer box of the meter and the electrical circuit use 500V DC plus 50M ohm or more. The insulation resistance of the meter shell and the electrical circuit is tested with 500V DC voltage.

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

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

12 Pointer sticking Instantly add three times the overcurrent of the full scale current, and slowly reduce to 1/2 of the reading of the current sensitivity, at this time the pointer will return to the 1/3 scale range of the scale plate

13 Friction When the current is added to the meter and gradually increases or decreases to a certain value, the error range of the indicating point is ±1mm

14 Brake Instantly add 2/3 of the current value of the scale plate, and the time required from the start to the position indicated by the pointer is within one second

special test

15 Overload test Input ten times the full-scale current every five seconds, and this action is repeated nine times. After 0.5 seconds each time, the test items 7-14 remain normal.

16 Vibration test After packaging, the meter is subjected to 1,000 up and down 4mm vibrations per minute, 10 minutes in each direction. Items 7-14 remain normal after this test

17 Shock test After the meter is packaged and dropped from a height of 30cm on a 3cm thick wooden board, the X.Y.Z. three-direction test remains normal after 7-14 items of this test

18 Reliability test After 100,000 times of calibration point current input, the current sensitivity limit is still within the standard

19 Environmental impact test Temperature 50°C, humidity 85%, lasting 100 hours, after this test 7-14 items remain normal

20 Terminal pull test The terminal must bear 1kg pulling force for 60 seconds without being affected

other

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

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

Do not place the meter in direct sunlight, and store the meter in a box to prevent foreign objects from entering the meter

23 Soldering conditions Place the terminal about 3 mm into a tin plate with a temperature of 230°C, and place the terminal for 3.5 seconds. After this test, items 7-14 remain normal.

Solder temperature Hand-held solder gun temperature 350 ℃, contact the terminal for 3.5 seconds, the front end of the terminal is about 3mm in contact with the solder gun, after this test 7-14 items remain normal

24 Anti-static Test three times in the same direction on the surface of the transparent cover with dry nylon cloth, the difference of the pointer on the score is less than 1/3 of the length of the scale, and it will return to the zero position after three seconds

25 Bulb Specifications 2 blue LED backlight (20mA at 2.9 - 3.2V) can change the backlight voltage to 12V for free