For RTD connections, the H648WD series offers flexibility with two-wire, three-wire, or four-wire configurations. In the context of thermocouple connections, the internal cold junction compensation feature can be engaged to ensure accurate temperature measurements. Furthermore, the device is capable of measuring millivolt signals and resistance signals, with an isolation voltage of DC1000V to safeguard against electrical interference and provide reliable signal transmission.
Parameters
Technical Specifications
Power supply: DC10-32V, input from the “Power Terminal”
Output: 4-20mA DC with HART communication superimposed
Load resistance: ≤(U-10)/0.22
Output accuracy: 0.1%, thermocouple with cold junction compensation error of 1℃
Operating temperature range: -40 to +85℃
Relative humidity: 10% to 90%RH
Dimensions: Diameter Φ=44mm, mounting hole spacing D=33mm
Weight: approximately 35g
Dimension
Wiring Diagram
Parameters
Input type and transmission accuracy
| Type | Measurement
scope |
Minimum
measurement scope |
Conversion
accuracy |
|
| Resistance
temperature detector (RTD) |
T | -200～400℃ | 25℃ | ±0.4℃/0.1％ |
| E | -200～1000℃ | 25℃ | ±0.4℃/0.1％ | |
| J | – 210～1200℃ | 25℃ | ±0.4℃/0.1％ | |
| K | -200～1372℃ | 25℃ | ±0.4℃/0.1％ | |
| N | -200～1300℃ | 25℃ | ±0.4℃/0.1％ | |
| R | 0～1768℃ | 100℃ | ±0.8℃/0.1％ | |
| S | 0～1768℃ | 100℃ | ±0.8℃/0.1％ | |
| B | 150～1820℃ | 100℃ | ±1.0℃/0.1％ | |
| DIN L | -200～900℃ | 50℃ | ±0.4℃/0.1％ | |
| DIN U | -200～600℃ | 50℃ | ±0.4℃/0.1％ | |
| W5Re/W26Re | 0～2000℃ | 100℃ | ±0.8℃/0.1％ | |
| GOST L | -200～800℃ | 50℃ | ±0.4℃/0.1％ | |
| mV Signle | -120～120mV | 10mV | ±10μV /0.1％ | |
| -1000～1000mV | 50mV | ±100μV /0.1％ | ||
| Thermo couple
(TC) |
Pt100_385 | -200～850℃ | 10℃ | ±0.15℃/0.1％ |
| Pt200_385 | -200～850℃ | 10℃ | ±0.15℃/0.1％ | |
| Pt500_385 | -200～850℃ | 10℃ | ±0.1℃/0.1％ | |
| Pt1000_385 | -200～850℃ | 10℃ | ±0.1℃/0.1％ | |
| Pt50_391 | -200～850℃ | 10℃ | ±0.15℃/0.1％ | |
| Pt100_391 | -200～850℃ | 10℃ | ±0.15℃/0.1％ | |
| Pt100_392 | -200～850℃ | 10℃ | ±0.15℃/0.1％ | |
| Cu10_428 | -100~260℃ | 10℃ | ±0.1℃/0.1％ | |
| Cu50_428 | -100~260℃ | 10℃ | ±0.1℃/0.1％ | |
| Cu100_428 | -100~260℃ | 10℃ | ±0.1℃/0.1％ | |
| Cu50_426 | -100~200℃ | 10℃ | ±0.1℃/0.1％ | |
| Cu100_426 | -100~200℃ | 10℃ | ±0.1℃/0.1％ | |
| Ni120 | -70~260℃ | 10℃ | ±0.1℃/0.1％ | |
| Resistence Single | 0～600 Ω | 100Ω | ±0.2 Ω/0.1％ | |
| 0～5000Ω | 100Ω | ±1.0 Ω/0.1％ | ||
Note 1: The “%” in output accuracy is relative to the set range, and the larger value between the range error and absolute error should be taken during application.
The ±0.4℃/0.1% indicates the absolute error, where ±0.4℃ represents the absolute error.
The output accuracy takes the larger value between “absolute error” and “0.1% * (upper limit of range – lower limit of range)”.
Note 2: Thermocouples DIN L and DIN U are German standards. W5Re/W26Re are American ASTM standards. GOST L is a Russian standard.
Note 3: Pt100_385 adopts the IEC751 and ITS-90 standards, which are also the standards used in China. Pt100_391 adopts the JIS 1604 standard.
Ordering Information
| Product Type | Part No. | Description | |
| Temperature Transmitter Board | DVRT | D148D | Economical Temperature Transmitter Board;
PT100 three -wire; DVRT communication protocol; Junction box installation. |
| D248WD | Isolated Temperature Transmitter Board;
RTD + TC various sensor type inputs; DVRT communication protocol, junction box installation. |
||
| HART | H648WD | Isolated Temperature Transmitter Board;
RTD + TC various sensors input; HART communication protocol; junction box installation. |
|
| H649WD | Isolated Temperature Transmitter Board;
RTD + TC various sensors input; HART communication protocol; DN rail installation. |
||
| H3051WD | Isolated Temperature Transmitter Board;
RTD + TC various sensors input; HART communication protocol; 3051 shell with a display screen. |
||
