Digital Meter
Receiver
MODEL 481C
- ■ Full scale display: ＋200 to 1999 (optional setting)
- ■ Offset display variable function: (-1000 to ＋1000)
- ■ Input selection function: 4 to 20 mA or 1 to 5 V
Standard Specifications
Model Designation
| 481C | - | □ | - | □ | - | □ | - | □ | - | □ | - | □ |
| ① | ② | ③ | ④ | ⑤ | ⑥ |
①Measuring Input
| Code | Measuring Range | Input Resistance | Accuracy * | Overload |
|---|---|---|---|---|
| 09 | 1 to 5 V | 1 MΩ | ±(0.1% of rdg + 2 digit) | DC ±250 V |
| 19 | 4 to 20 mA | 12.5 Ω | ±(0.1% of rdg + 2 digit) | DC ±150 mA |
- *Accuracy:
- Defined at 23 ± 5°C, 45 to 75% RH.
- Temperature coefficient:
- Defined at ±200 ppm/°C (Temp. range: 0 to 50°C)
- Internal range setting:
- The range 09, 19 can be changed by pin headers.
②Power Supply
| Code | Power Source Voltage |
|---|---|
| 3 | AC 100 V |
| 5 | AC 200 V |
| 9 | DC 24 V |
③Data Output
| Code | BCD Specifications |
|---|---|
| Blank | For display only (no output) |
| BP | TTL level (positive logic） |
| BN | TTL level (negative logic） |
| DN | transistor (sink type） |
④Decimal Point
| Code | Description |
|---|---|
| Blank | Front setting |
| 1 | External control |
⑤Sampling Rate
| Code | Description |
|---|---|
| Blank | 2.5 times/s fixed. |
| T | Green LED |
⑥Display Color
| Code | Description |
|---|---|
| Blank | Red LED |
| G | Green LED |
General Specifications
| Display | 0 to 1999 red or green LED (character height 14.2 mm) with zero-suppress function. | ||||||
|---|---|---|---|---|---|---|---|
| Scaling function | Full scale display +200 to +1999, Offset display -1000 to +1000. | ||||||
| Decimal point | Optional (front setting or external control) | ||||||
| Over-range display | Flashing with “0”. | ||||||
| Hold function | Holds measured data (without isolation). | ||||||
| Resolution | 1/2000 | ||||||
| Sampling rate | 2.5 times/s fixed or 2.5 to 0.2 times/s variable. | ||||||
| Input selection | Measuring input 1 to 5 V or 4 to 20 mA can be internally altered. | ||||||
| Input type | Single ended, floating input. | ||||||
| A/D conversion | Dual Slope Integration System | ||||||
| Noise rejection |
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| Withstand voltage |
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| Insulation resistance | DC 500 V More than 100 MΩ | ||||||
| Power supply | AC 100 V （90 to 132 V） AC 200 V （180 to 250 V） DC 24 V （24 V ± 10%） |
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| Power consumption | AC power source…Approx. 3 VA DC power source…Approx. 60 mA |
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| Operating temperature | 0 to 50°C | ||||||
| Storage temperature | -20 to 70°C | ||||||
| Weight | AC power source…Approx. 300 g DC power source…Approx. 200 g |
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| External dimensions | 96(W)×48(H)×89.5(D) mm |
