Martel Electronics MC1200 - Manual (Page 27)

Figure 22. Calibrating a Pressure Transmitter
7. Remote Operation
The calibrator can be remotely controlled using a PC terminal, or by a computer program
running the calibrator in an automated system. It uses an RS-232 serial port connection for
remote operation. With this connection the user can write programs on the PC, with Windows
languages like Visual Basic to operate the calibrator, or use a Windows terminal, such as
Hyper Terminal, to enter single commands. Typical RS-232 remote configurations are shown
in Figure 23.
Figure 23. Calibrator-to-Computer Connection
7.1 Setting up the RS-232 Port for Remote Control
Note: The RS-232 connection cable should not exceed 15m unless the load capacitance
measured at connection points is less than 2500pF.
27