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Application Note 8

Analog I/O Board Diagnostics

Applies to: SIGNAL & RTS

NOTE: This note applies to DT-2821 analog I/O boards.

Introduction

If your DT-2821 analog I/O board appears to be malfunctioning, first check your signal

source and all cables and instruments leading to or from the I/O board, including the

SIGNAL I/O cable and panel. Remove any non-essential components and if possible

exchange the others one by one. If you still suspect the board itself, then run the Data

Translation diagnostics on the board. Following are instructions:

1. The DT diagnostics program "DT2821.EXE" is included in the C:\SIGNAL

directory. To execute it, leave SIGNAL, attach to this directory, and type "DT2821"

at the DOS prompt.

2. Select your board model from the menu: DT-21EZ (50 KHz), DT-2821 (50 KHz),

DT-2821F (150 KHz), or DT-2821G (250 KHz). When asked if the board is factory

configured, say YES unless you've rejumpered the board for a different base address

or IRQ.

3. Run the following tests from the main menu and submenus. These tests require no

external connections. Tests not listed below require that external signals be provided

to the board. Within the submenus, it may be necessary to hit <arrow> keys and

<enter> twice. After reporting test results (e.g., "Board Response PASSED") the

program will pause before returning to the submenu - don't hit <enter>, just wait.

Note: the DIO section of the Acceptance Test and the DIO test will fail - this is

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Engineering Design NIDisk Betriebsanweisung Seite 15