4-Loop temperature inspecting instrument with high measurement accuracy. It features 4-channel on-off control functionality and can also be optionally equipped with one-channel transmitter output or standard MODBUS RTU communication function. The LCD screen displays all information of the four loops and the alarm function on the same interface. With a user-friendly design, it allows customers to operate and get started more conveniently.
T4-Loop temperature inspecting instrument adopts an OLED display design, which improves the shortcomings of traditional LCD displays such as narrow viewing angle, unclear display, and easy damage to the backlight. Each of the four loops can be independently set with on-off control functionality. Internally, it uses a 20-bit high-precision AD (Analog-to-Digital) measurement module. Additionally, the four input channels support simultaneous input of different types of signals.
Features
4-Loop temperature inspecting instrument adopts electronic technology, with high-speed signal processors and microprocessors as the core. The digital design ensures higher intelligence and measurement accuracy.
Equipped with an opto-isolated RS-485 communication interface, it uses the ModBus RTU communication protocol. The circuit design implements three-terminal isolation for input, power supply, and output.
It has 4 independent input channels, which can connect to 26 types of common industrial signals.
Input
K, S, R, T, E, J, B, N, WRe3-WRe25, WRe5-WRe26, 4～20mA, 0～20mA, Cu50, PT100, 0～80Ω, 0～400Ω, 0～20mV, 0～100mV, 0～1V, 1～5V, 0～5V, -20～+20mV, -100～+100mV, -5V～+5V, 0～10V, -10V～+10V
Output
0 (0-5V), 1 (0-10V), 2 (0-20mA), 3 (0-10mA), 4 (1-5V), 5 (2-10V), 6 (4-20mA)
Communication
Equipped with an opto-isolated RS-485 communication interface
Alarm
4-channel relay output, with optional on-off control
Other Detailed Parameters
| Number of Input Channels | 4 independent channels, supporting different input types |
| Input Signal Range | 26 types of common industrial standard signals |
| Basic Error | 0.002FS ± 1 digit |
| Resolution | 1/20000 |
| Measurement AD | 20-bit, 13SPS (Samples Per Second) |
| Output DA | 16-bit, 200KSPS (Kilo Samples Per Second) |
| Input Impedance | ≥500KΩ for voltage signals; ≤300Ω for current signals (a special requirement of 650Ω for current can be met, please specify when placing an order); ≤0.25mA for thermal resistors; ≥500KΩ for thermocouples |
| Output Impedance (Load Capacity) | ≥250KΩ for voltage signals; ≤300Ω for current signals (a special requirement of 650Ω for current can be met, please specify when placing an order); Relays |
| Display Mode | OLED (Organic Light-Emitting Diode) |
| Sampling Period | 0.5S |
| Communication Mode | RS485 interface, two-wire system |
| Driving Distance | 1200 meters |
| Communication Protocol | MODBUS RTU |
| Parity Check Mode | None, Odd, Even |
| Baud Rate | 4800, 9600, 19200 |
| Communication Data Format | 1 start bit, 8 data bits, 1 stop bit |
| Power Supply Voltage | AC220V/DC24V |
| Isolation Voltage | 2000V AC for 1 minute |
| Operating Conditions | Temperature |
| Storage Conditions | Temperature |
Model Selection & Dimensions
DK20H8P:
Outline Dimension: 48×96mm
Mounting Hole Dimension: 44×92mm
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