Acculab VI-200 Buku Petunjuk - Halaman 16

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TECHNICAL

APPENDICES

Verifying A Correct Cable Connection

This procedure assumes the following:

- You are using a PC that is running either Windows 95/98/NT4.0.

- The PC has Hyperterminal installed, (a communications package that ships with Windows).

- The interface cable is properly attached to both the balance RS-232 port and PC port (COMx).

- The balance communication parameters are all set to their defaults of 1200 baud, odd parity, and 1 stop bit.

Perform the following steps:

1. Turn on your balance, and invoke Hyperterminal.

2. Click "File-->Properties" to bring up the Properties window.

3. Make sure the box called "Connect Using" says "Direct to Comx".

... "x" is the COM port of your PC, usually, either 1 or 2.

4. Click the "Configure" button, and check that the following values are selected:

Bits per second:

1200

Data bits:

Parity:

Odd

Stop bits:

Flow control:

Hardware

5. Exit back to the main Hyperterminal screen, by clicking "OK" twice. The bottom-left of your window should say

"Connected". At this point, press and hold the "TARE/PRINT" button on the balance. The value on the LCD should show up in

the Hyperterminal window.

Controlling The Balance Remotely Via Computer

Because the VIR-Series RS-232 interface is bi-directional, a connected computer can remotely control the balance. There are

nine (9) balance functions, as listed in the table entitled "Remote Balance Operation Functions & Control Codes" (page 17)

that can be remotely invoked from an attached computer. The process of sending these codes varies depending on the com-

puter software used. Programming languages such as C++ and Visual Basic can be used to create routines to grab data

from the balance. There are also many software packages commercially available to help users capture data from RS-232-

enabled laboratory devices, like the VIR-Series.

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