Wiring; Setup; Baud Rate; Sample Period - Fluke 7341 User Manual

7341 Calibration Bath
User's Guide
10.1.1
10.1.2
10.1.2.1
10.1.2.2
58

Wiring

The serial communications ca-
ble attaches to the bath through
the DB-9 connector on the back
of the instrument. Figure 7
shows the pin-out of this con-
nector and the suggested cable
wiring. To eliminate noise, the
serial cable should be shielded
with low resistance between the
connector (DB-9) and the
shield.

Setup

Before operation the serial in-
terface of the bath must first be
set up by programming the baud
rate and other configuration pa-
rameters. These parameters are
programmed within the serial
interface menu.
To enter the serial parameter
programming menu, press
"EXIT" while holding down
"SET", then release both but-
tons to enter the secondary
menu. Press "SET" repeatedly
until the display reads
"ProbE". This is the menu selection. Press "UP" repeatedly until the serial in-
terface menu is indicated with "SErIAL". Finally press "SET" to enter the se-
rial parameter menu. In the serial interface parameters menu are the baud rate,
the sample rate, the duplex mode, and the linefeed parameter.

Baud Rate

The baud rate is the first parameter in the menu. The display prompts with the
baud rate parameter by showing "BAUd". Press "SET" to choose to set the
baud rate. The current baud rate value is displayed. The baud rate of the bath
may be programmed to 300, 600, 1200, or 2400 baud. The baud rate is pre-pro-
grammed to 2400 baud. Use "UP" or "DOWN" to change the baud rate value.
Press "SET" to set the baud to the new value or "EXIT" to abort the operation
and skip to the next parameter in the menu.

Sample Period

The sample period is the next parameter in the menu and prompted with
"SAnPLE". The sample period is the time period, in seconds, between temper-

Figure 7 Serial Communications Cable Wiring