17
•
Check rig / board, as a part of periodic performance check.
•
Download harness data, label data, harness name, barcode etc. from a PC
Using DOS as well as windows based software.
•
Relay on time is settable through software. (1 to 10 sec).
2.3.3: Harness Data (Circuit Data)
:
Tester stores harness data in its memory which is retained even on power off.
Type of memory used is EEPROM. Earlier BBRAM (Battery Backed RAM) was used.
Harness data can be loaded either by self learning or downloaded from PC’s
serial RS232 port.
The tester can store data for twenty five harnesses. Harness data in Cable
number 0, cannot be stored on power off. Hence tester can test twenty-five fixed types of
harnesses and one general type of harness. The tester counts the number of points
‘learnt’ or loaded from PC and displays them to help learning as well as loading. Tester
also displays and compares the stored number of points and actual number of points in a
net list / programmes; when a cable number is selected. If they are not same the tester
displays error and disables “test” key. This facility confirms the correctness of data in
memory.
2.3.4: Input / Output cards
(I/O cards):
I/O cards
are connected to main controller unit, and controller controls them
all. Controller finds out the number of cards present and then displays results
accordingly.
Add on card can be added at any time without changing hardware or
software
. At one edge of
I/O
card; two D type 25 pin male connectors and one D type 15
pin male connector is provided. These are the points to be connected to rig. Tester has its
own power supply working on mains supply. The tester is a very handy unit and can be
shifted from rig to rig very easily.
2.3.5: Keyboard:
Keyboard is a sealed keyboard with six numbers dome type keys. It should be
pressed gently. More than one ‘Test’ keys are provided, as it is used frequently, life of
keyboard increases. Keyboard should never be pressed by nail.
