Fluke 5020A ユーザーズマニュアル

 

 

 

 

6

 

  

6-3 

The communication feature allows an external device, such as a computer, to 

communicate with the thermo-hygrometer readout to obtain measurement data and 

control operation settings. Communication is accomplished by issuing commands to the 

thermo-hygrometer readout through RS-232 or IR communication ports. 

The thermo-hygrometer readout is equipped with an RS-232 serial interface and an 

infrared window. The serial interface allows communications up to distances of 

approximately 50 feet. The IR interface allows close proximity, line-of-sight, wireless 

communications. The serial interface and infrared window allow the user to access the 

functions, parameters, and settings discussed in Comm Setting. 

The serial communications cable attaches to the thermo-hygrometer readout through the 

RS-232 port on the left side of the instrument. Figure 6-1 shows the pin-out of this 

connector and suggested cable wiring. Note the TxD line on one side connects to the RxD 

line on the other side and vice-versa. To eliminate noise, the serial cable should be 

shielded with low resistance between the connector and the shield. 
The serial period, baud rate, linefeed, and echo (duplex) are programmable. Refer to 

Section , Comm Setting, for instructions on accessing and setting these parameters. 
All commands sent to the thermo-hygrometer readout through the serial interface must be 

terminated with a carriage return (ASCII 0D hex, 13 decimal) or new line character 

(ASCII 0A hex, 10 decimal). 

1

2

3

4

5

6

7

8

9

RxD

TxD

GND

RxD

TxD

GND

 

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