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K3TF
Easy-to-use, Low-cost Digital Panel Meter that Accepts AC Input
Data Sheet (244KB)
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Ratings
| Supply voltage | 100 to 120 VAC (50/60 Hz); 200 to 240 VAC (50/60 Hz) |
| Operating voltage range | -15% to +10% of supply voltage |
| Power consumption | 4 VA (at max. load) |
| Insulation resistance | 10 MΩ min. (at 500 VDC) between external terminal and case |
| Dielectric strength | 2,000 VAC min. for 1 min between input terminal and power supply 2,000 VAC min. for 1 min between external terminal and case |
| Noise immunity | ±1,500 V on power supply terminals in normal or common mode |
| Vibration resistance | Malfunction: 10 to 55 Hz, 0.5-mm single amplitude for 10 min each in X, Y, and Z directions Destruction: 10 to 55 Hz, 0.75-mm single amplitude for 2 hrs each in X, Y, and Z directions |
| Shock resistance | Malfunction: 98 m/s2 for 3 times each in 6 directions Destruction: 294 m/s2 for 3 times each in 6 directions |
| Ambient temperature | Operating: -10° to 55°C (with no icing) Storage: -20° to 65°C (with no icing) |
| Ambient humidity | Operating: 35% to 85% (with no condensation) |
| Ambient operating atmosphere | No corrosive gas |
| EMC | (EMI) EN61326+A1 Industry Emission Enclosure: CISPR 11 Group 1 class A: CISRP16-1/-2 Emission AC Mains: CISPR 11 Group 1 class A: CISRP16-1/-2 (EMS) EN61326+A1 Industry Immunity ESD: EN61000-4-2: 4 kV contact discharge (level 2) 8 kV air discharge (level 3) Immunity RF-interference: EN61000-4-3: 10 V/m (amplitude-modulated,80 MHz to 1 GHz) (level 3) Immunity Fast Transient Noise: EN61000-4-4: 2 kV (power line) (level 3) Immunity Burst Noise: 1 kV line to line (I/O signal line) Immunity Surge: EN61000-4-5: 1 kV line to line 2 kV line to ground (power line) Immunity Conducted Disturbance EN61000-4-6: 3 V (0.15 to 80 MHz) (level 2) Immunity Voltage Dip/Interrupting EN61000-4-11: 0.5 cycles, 0, 180°, 100% (rated voltage) |
| Approved standard | UL508,CSA22.2; Conforms to EN61326+A1, EN61010-1 (IEC61010-1) Conforms to VDE0106/P100 (finger protection) when the terminal cover is mounted. |
Characteristics
| Input signal | AC voltage/current |
| A/D conversion method | Double integral method |
| Root-mean-square value indication | Root-mean-square value of half-wave rectified current detected |
| Sampling period | 2.5 times/s |
| Display refresh period | 2.5 times/s |
| Max. displayed digits | 3 1/2 digits (1999) |
| Display | 7-segment red LED |
| Decimal point display position | Selected with slide switch (see note 1) |
| Overflow display | Overflow: 1[][][] |
| Zero suppression | Not supported. |
| External control | Process value hold (terminals on rear panel short-circuited) |
| Degree of protection | Front panel: IEC IP51 (see note 2) Case: IEC IP20 Terminals: IEC IP00 |
Note:
1. Only for models with signal monitor.
2. IP51 is maintained when the water-resistive soft cover and bracket are used. IP50 will be, however, maintained without these water-resistive accessories.
Measuring Ranges
| Monitor | Input range | Measuring range | Max. resolution | Input impedance | Accuracy | Max. permissible load |
| Line monitor | AC voltage | 0 to 199.9 V | 100 mV | 10 MΩ | ±0.3%rdg ±1 digit (see note 1) | 500 V |
| 0 to 400 V | 1 V | 10 MΩ | ±0.3%rdg ±1 digit | 500 V | ||
| Signal monitor | AC voltage | 0 to 199.9 mV | 100 μV | 10 MΩ | ±0.3%rdg ±1 digit | 250 V |
| 0 to 1.999 V | 1 mV | 10 MΩ | ±0.3%rdg ±1 digit | 250 V | ||
| 0 to 19.99 V | 10 mV | 1 MΩ | ±0.3%rdg ±1 digit | 250 V | ||
| AC current | 0 to 1.999 mA | 1 μA | 100 Ω | ±0.5%rdg ±1 digit | 50 mA | |
| 0 to 19.99 mA | 10 μA | 10 Ω | ±0.5%rdg ±1 digit | 150 mA | ||
| 0 to 199.9 mA | 100 μA | 1 Ω | ±0.5%rdg ±1 digit | 500 mA | ||
| 0 to 1.999 A | 1 mA | 0.1 Ω | ±0.5%rdg ±1 digit | 3A |
Note:
1. With 100% input. ±0.3% FS±1 digit when the input is less than 35% FS.
2. The above accuracy is at an input frequency range of 40 Hz to 1 kHz and an ambient temperature of 23 ± 5 °C.
Caution: In the interenst of product improvement, specifications are subject to change without notice.
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