Handheld Device
Description :
HART375E intelligent handheld device can configure, calibrate and maintain all devices that comply with HART protocol, including setting the measuring range, loop testing, monitoring process variables, and making on-site fine adjustments.
HART375E supports the first master device of the HART (such as HART bridges) and also supports the point-to-point and multi-point communication modes of HART.
HART375E can be connected in parallel to HART devices or to their load resistors (250Ω). There is no need to consider the polarity of the leads when making the connection.
Note: To ensure the normal communication of HART375E, the minimum value of the loop load resistance should be 250Ω. HART375E cannot directly measure the loop current.
HART375E supports the first master device of the HART (such as HART bridges) and also supports the point-to-point and multi-point communication modes of HART.
HART375E can be connected in parallel to HART devices or to their load resistors (250Ω). There is no need to consider the polarity of the leads when making the connection.
Note: To ensure the normal communication of HART375E, the minimum value of the loop load resistance should be 250Ω. HART375E cannot directly measure the loop current.
Parameters
HART375E is usually applied in the following scenarios
- Industrial Instrument Debugging & Maintenance: In industries like petroleum, chemical, power, and metallurgy, technicians use the H375 handheld for debugging, calibrating, configuring, and diagnosing HART-protocol-based field instruments like pressure, temperature transmitters, flow meters, and liquid level gauges. For instance, in chemical production, it helps set and calibrate pipeline flow meter parameters for accurate measurement and stable production.
- On-site Operation of Intelligent Transmitters: For HART-protocol intelligent transmitters, the H375 can modify parameters like measurement range, zero point, etc. on site, improving efficiency as there’s no need to send them back for adjustment. For example, it can quickly adjust the pressure transmitter’s range when needed.
- Maintenance of Fieldbus Systems: In industrial automation systems using HART fieldbus technology, the H375 is a maintenance tool for address allocation, device identification, and communication monitoring of bus devices, ensuring system reliability and efficiency.
- Troubleshooting of Instruments: When instruments malfunction, technicians can use the H375 to read internal info and diagnostic codes to quickly find fault causes and take measures to reduce downtime and losses.
Main Features
| Features | Description |
| Stable Connection | Good anti-interference, can keep stable links with field devices in complex environments. Via cables, it can reach a certain communication distance, helping engineers operate devices at different spots. |
| Parameter Configuration | Allows configuring various parameters of field devices. Engineers can adjust them easily through an intuitive interface to boost efficiency. |
| Device Diagnosis | Can diagnose field device faults by reading self-diagnostic info, helping engineers quickly find causes and take measures to reduce downtime. |
| Device Identification and Information Viewing | Identifies device details and shows operation info like current values and running time, supporting device |
| User-friendly Interface | With an easy-to-use graphical interface and clear menu, it’s simple for non-professionals. Its backlit screen shows clearly in dim sites. |
| Portability | Small and lightweight, easy to carry around. Battery-powered with long life, it meets on-site work needs. |
Technical Specifications
| Items | Specifications |
| HART® Interface | •Complies with HCF (HART Communication Foundation) specifications.
•Receive a common – mode voltage of ±28V. •Typical leakage current is less than 1.0uA at 25℃. •Maximum communication distance 1500m. •Against EMI (Electromagnetic Interference). •Automatic amplitude – doubling function. |
| Operating temperature | 0℃～+50℃ |
| Storage temperature | -20℃～+55℃ |
| Power Supply | 3 AA alkaline batteries or nickel-metal hydride rechargeable batteries. |
| Continuous Working Time | 150 hours, alkaline batteries.
Note: If not operate this device within approximately 10 minutes, the device will automatically turn off to save battery life. |
| Dimension | 228mm × 100mm × 60mm
(The handheld part is 70mm wide × 36mm thick) (Excluding the plug and the part of the outgoing cable). |
Ordering information
| Product Type | Part No. | Description |
| System Product Line | HART375E | HART operator(English version). |
| HART375E-G | HART operator(English version) with power output. | |
| USB232 | HART modem;
USB interface; Support HART software for debug HART instruments. |
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