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Figure 11.2 Connections to the Converter Unit
11.2 Procedure for Communications with HHT
This section describes the HHT basic operation procedure for communications between the flowmeter
and HHT. For details, refer to the HHT instruction manual.
* The following procedure makes a commercially available PDA (OS: Windows Mobile) serve as a
HHT.
Procedure Operation
Prepare a hand-held terminal (1)
Install the AF900 application software to a commercially available PDA (OS:
Windows Mobile) main unit. Then insert the serial interface card supplied with
AF900 to the card slot of the PDA.
Prepare a hand-held terminal (2)
Connect the HART interface cable and serial interface card supplied with
AF900 to each other.
Connect
Connect the alligator clip at the head of the HART interface cable to the current
output line of the converter via a load resistor.
Start
Turn on the power supply of the PDA to start the AF900 application software.
Preliminary communication
Execute [sensor communication]. The model of the connected sensor product
is automatically identified and the converter menu screen appears.
Check/change data
Press the relevant parameter button and check/change data.
Exit the communication
When all operations are complete, press the [Exist Application] in the top
screen to turn off the power supply of the PDA.
HHT connection cable and clips
Converter terminal block
HHT