Tachometer / Ratiometer
Digital Tachometer
MODEL 471C
- ■ Available with up to 100kHz signal.
- ■ Moving average & predicted function.
- ■ Available with teaching function for auto-scale of measured value.
- ■ Comparative judgement & data output
Standard Specifications
Model Designation
| 471C | - | □ | - | □ | - | □ | - | □ |
| ① | ② | ③ | ④ |
①Power supply
| Code | Power Supply Voltage |
|---|---|
| A | AC100 to 240V |
| 9 | DC24V |
②Comparative output
| Code | Power Supply Voltage |
|---|---|
| X | No output |
| 2 | 4 photo-MOS relays (HH, H, L, LL) |
③Analog output
| Code | description | Allowable load resistance |
|---|---|---|
| X | No output | --- |
| 04 | DC0 to 5V | More than 1kΩ |
| 05 | DC0 to 10V | More than 1kΩ |
| 09 | DC1 to 5V | More than 1kΩ |
| 29 | DC4 to 20 mA | Less than 510Ω |
④Digital output
| Code | Optional Output |
|---|---|
| X | No output |
| DN | BCD (Open collector / NPN) |
| E0 | RS-232C |
| E1 | RS-485 |
General Specifications
| Measurement examples | Number of revolutions, Speed, Frequency, Instantaneous flow, Instantaneous power |
|---|---|
| Measurement input | SIG1: No voltage contact or NPN open collector Contact capacity: DC12V 10mA, Open collector residual voltage: less than 3V Frequency: 0.0067Hz to 100kHz Pulse width: more than 5µs to more than 25ms (hinge on the frequency) |
| SIG2: Voltage Pulse Input resistance: Approx. 24kΩ, Input level: “L” = 0 to 1.5V, “H” = 4 to 30V Frequency: 0.0067Hz to 30kHz Pulse width: more than 17μs to more than 25ms (hinge on the frequency) |
|
| Display | Display1: Red or Green LCD, Character height 15.2mm SV1, SV2: White LCD, Character height 7.6mm Zero suppression function |
| Display range | Display1: 0 to 999999 SV1, SV2: 0 to 999999 |
| Decimal point | Arbitrary setting (0 / 0.0 / 0.00 / 0.000 / 0.0000 / 0.00000) |
| Display scaling | Parameter α 1 x 10-9 to 999999 x 10-0 |
| Display accuracy | +/- (0.008% + 1digit) |
| Display cycle | 0.1 to 19.9 s |
| Cut-off time | 0.1 to 150.0 s |
| Number of moving averages | 1 to 10 times |
| Sensor power supply | DC12V +/- 10%, 80mA (built-in) |
| Supply voltage | AC100 to 240V (50/60Hz), DC24V |
| Voltage tolerance of power supply | AC90 to 250V, DC24V +/- 10% |
| Power consumption | AC100V: Approx. 9VA AC200V: Approx. 12VA DC24V: Approx. 200mA |
| Operating ambient environment | 0 to 50℃, 40 to 85 %RH (No condensation) |
| Weight | Approx. 300 g |
| Protection | Front operation unit: IP65 Rear case: IP20 Terminals: IP00 |
