Single Phase Digital Combined Meter - China Suppliers & Factory - Voltage, Current, Power Measurements
📋 Product Overview
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📐 1.1 Measuring Range
- Voltage (Direct): AC 0 ~ 600V
- Voltage (Accessory): AC 0 ~ 9999KV (PT */100V)
- Current (Direct): AC 0 ~ 10A
- Current (Accessory): AC 0 ~ 9999A (CT */5A)
- Frequency: 45 ~ 65Hz
- Active Power: 0 ~ 9999KW
- Reactive Power: 0 ~ 9999KVar
- Power Factor: 0.000C ~ 0.500C ~ 1.000 ~ 0.000L ~ 0.500L
- ⚡ 1.2 Accuracy Rating ±0.5 FS ±1 digit High Precision
- 🔄 1.3 Sampling Rate Approx. 1 time/s
- 🖥️ 1.4 Measuring Display Mode RMS measurement, four-digit LED nixie tube display
- 🔢 1.5 Display Resolution Max. resolution: 0.001A | 0.1V | 0.01Hz
- 🔌 1.6 Input Circuit Consumption Current < 0.5VA | Voltage < 1VA
- 🔋 1.7 Auxiliary Power Supply AC 220V, 50/60Hz Customizable
- 💡 1.8 Auxiliary Supply Consumption < 3VA
- ⚠️ 1.9 Overflow Indication Displaying character "HHHH"
- 🔔 1.10 Alarm Output Higher and lower limit alarm output by two groups of relay; contact rating: AC 250V/2A, DC 30V/2A
- 📡 1.11 Transmitting Output Freely configurable: DC 0~10mA, 0~20mA or 4~20mA; Accuracy: ±0.5% FS; Electrical isolation between signal input and auxiliary power supply Isolated
- 🔩 1.12 Transmitting Output Load Resistance ≤ 500Ω
- 🔗 1.13 Communication Interface RS485 serial communication, MODBUS-RTU protocol RS485
- 🌡️ 1.14 Operational Environment Free of corrosive gas; Temperature: -10 ~ 50°C; Humidity: ≤ 85% RH
📊 Technical Parameters
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| Function & Shape / Model | Measure & Display | Shape Code (Figure Inside □) |
Selected Additional Functions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Current | Voltage | Frequency | ⑧ 80×80 | Current | Voltage | Frequency | 2-Channel Switch Output | Current | |
| SFS-□K2-UI | ● | ● | SFS-□K2-UI | ● | ● | SFS-□K2-UI | ● | ||
| SFS-□K3-UIF | ● | ● | ● | SFS-□K3-UIF | ● | ● | ● | SFS-□K3-UIF | ● |
| SFS-□K3-UIH | ● | ● | SFS-□K3-UIH | ● | ● | SFS-□K3-UIH | ● | ||
| SFS-□K3-UIP | ● | ● | SFS-□K3-UIP | ● | ● | SFS-□K3-UIP | ● | ||
| SFN-□K2-UI | ● | ● | SFN-□K2-UI | ● | ● | SFN-□K2-UI | ● | ||
| SFN-□K3-UIF | ● | ● | ● | SFN-□K3-UIF | ● | ● | ● | SFN-□K3-UIF | ● |
| SFN-□K3-UIH | ● | ● | SFN-□K3-UIH | ● | ● | SFN-□K3-UIH | ● | ||
| SFN-□K3-UIP | ● | ● | SFN-□K3-UIP | ● | ● | SFN-□K3-UIP | ● | ||
| SFN-□K3-UIF+RS | ● | ● | ● | SFN-□K3-UIF+RS | ● | ● | ● | SFN-□K3-UIF+RS | ● |
| SFN-□K3-UIH+RS | ● | ● | SFN-□K3-UIH+RS | ● | ● | SFN-□K3-UIH+RS | ● | ||
❓ Frequently Asked Questions
💬
What is the maximum voltage this meter can measure directly?
The meter supports direct AC voltage measurement up to 600V. For higher voltages, an accessory PT (Potential Transformer) can be used to measure up to 9999KV (PT */100V).
💬
What communication protocol does this meter support?
The meter is equipped with an RS485 serial communication interface and applies the MODBUS-RTU communication protocol, making it compatible with most industrial automation and SCADA systems.
💬
Can the transmitting output current range be customized?
Yes. The transmitting output can be freely configured as DC 0~10mA, 0~20mA, or 4~20mA. The accuracy rating is ±0.5% FS, and there is electrical isolation between the signal input and auxiliary power supply.
💬
What does the "HHHH" display on the meter indicate?
When the measured value exceeds the meter's display range, the four-digit LED nixie tube will show "HHHH" as an overflow indication, alerting the user that the input signal is out of range.
💬
What are the alarm output specifications?
The meter provides two groups of relay alarm outputs for both upper and lower limit alarms. The contact rating supports AC 250V / 2A and DC 30V / 2A, suitable for most industrial alarm applications.
💬
What operating environment conditions are required for this meter?
The meter should be installed in an environment free of corrosive gas, with an ambient temperature range of -10°C to 50°C and relative humidity not exceeding 85% RH to ensure reliable and accurate operation.














