4700 Refrigerated Sampler Service Guide
Section 4 CPU and Power Supply
4-7
4.3 CPU Board Tests
The tests described in this section are accessed through the
serial port (interrogator port) with a terminal emulation program
such as HyperTerminal.
To connect the sampler to a computer, use the optional 3.8 m
(12.5 ft) RS-232 serial communication cable, 69-4704-042. This
cable connects to the DB9-pin serial port connection on a com-
puter. Connections to a computer without the DB9-pin serial port
will require a user-supplied USB to serial port adapter.
1. Configure your communications software for:
·
a baud rate no higher than 38,400
·
8 data bits
·
no parity
·
1 stop bit
·
No flow control
·
Auto Detect or VT100 terminal emulation.
2. Using your communications software, connect to the sam-
pler. Repeatedly type “?” (Shift + ?) using the computer
keyboard until the sampler returns its banner string. The
banner string lists the model number and unique ID of the
sampler.
A “>” prompt will appear on the screen when it is ready to
accept commands.
From this menu, you can access time-date read/write and
functional tests.
4.3.1 TIME-DATE
Read/Write
TIME_DATE <CR> –
This command will return the current
time and date set in the real-time clock chip in the format of
HH:MM:SS DD-MM-YY.
TIME_DATE = HH:MM:SS DD-MM-YY <CR> –
U s e t h i s
command to adjust the time and date in the real-time clock chip.
Note that the format must be followed exactly with one space
before and after the equal sign, colons between time elements,
one space between time and date, and dashes between date ele-
ments.
4.3.2 Sampling Reports
To retrieve a report of the sampler’s program settings, type
SET-
TINGS<CR>
.
The sampler records the sample and bottle number at the time of
each sample event. A sampling results report can be obtained by
typing
RESULTS<CR>
. The RESULTS report contains data
from the most recently run program only.
For a repo rt conta ining both settings and results, ty pe
REPORT<CR>
.
4.3.3 Functional Tests
To begin functional testing, type
TEST<CR>
. This command
activates test mode. The display will be blank and unlit. As each
test is performed, related text will appear on the screen. As most
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