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Tachometer 4 Digital Green LED Tach RPM Speed Meter Tester 10-9999 with Hall Switch Sensor NPN
Specifications:
Working power supply: AC/DC 8-24V, 40mA
Display mode: 0.56 red LED, 4 digit reading
Measuring range: 10-9999
Measurement accuracy: ±0.1%, reading ±1 word
Display refresh rate: >3 times/second
Overrange display: the first digit displays "1" or "-1", the last 3 digits are not displayed
Package List:
1x RPM Speed Meter
Note:
1. Connect the plug correctly according to the wiring diagram.
2. The Hall switch is NPN normally open type, and the detection distance of the Hall switch needs to be within 10mm. The diameter of the Hall switch is 12mm, and the wire length is less than 1m.
3. Strong electromagnetic interference should be avoided. It is best to use shielded wire or twisted-pair measuring wire.
4. The switch or circuit for the counting signal and clearing signal input of the counter should be as close as possible to the terminal of the counter to make the signal line as short as possible.
5. Avoid connecting with other equivalent pipes or twisted wires such as strong electric wires or power wires to avoid unnecessary interference. If necessary, please use shielded wires.
6. It is not recommended to use mechanical switches or micro switches, because their life is relatively short, and it is easy to miscount after a long time; if using mechanical switches or micro switches, please use switches with better quality to avoid miscounting; magnetic switch is recommended.
Wiring Diagram:
