Table of Contents
Advertisement
4. Enabling the data store does not clear the buffer of pre-
viously stored readings. Instead, new readings will over-
write old readings starting at buffer location 001.
2.8 FRONT PANEL PROGRAMS
There are fourteen programs available from the front panel
of the Model 193A. These programs are listed in Table 2-2.
The following
paragraphs describe and explain the opera-
tion of each program.
2.8.1 Cursor
and Data Entry
Many of the Model 193A programs need data to be applied
from the front panel. After these programs are selected,
cursor location is indicated by a bright, flashing display digit
with
the rest of the modifiable
characters
at normal
brightness.
Data entry is accomplished
by placing the cursor on the
appropriate
character to be modified
and pressing
the
selected data button (0 through 9, or decimal point). Cur-
sor control is provided
by the RANGE 4 and ) buttons
which move the cursor left and right respectively. If the cur-
sor is moved pass the least significant
digit, it will move
back to the most significant
digit. Polarity (+ button) can
be changed with the cursor on any character. Plus (+) is
implied and thus, not displayed. When entering data, the
decimal point button ('"') can be used to clear the display
to read all zeroes.
2.8.2 Program
TEMP
Program TEMP allows the user to select the alternate RTD
alpha value (0.00385 or 0.00392) and change the thermo-
metric scale ("C or "F). Pam mph 2.6.9 provides informa-
&I
tion necessary for making R
temperature measurements.
Perform the following
steps to use this program:
1. Press the PRGM button.
The following
prompt will be
displayed:
PROGRAM
7
2. Press the TEMP button. The current alpha value will then
be displayed. If the instrument
is currently
set to the fac-
tory default alpha value, the following
message will be
displayed:
RTD a = 0.00392
3. Pressing one of the range buttons will toggle the display
to the alternate alpha value as shown:
RTD a = 0.00385
4. To enter the displayed alpha value, press the ESTER huts
ton. The following
message will be displayed
brietly:
ENTERED
5. The current thermometric
scale will then be displayed.
If the instrument
is currently
on "C, the follwving
message will be displayed.
6. Pressing one of the range buttons \\.ill tog&
the diz+>~
to the alternate scale as shorvn:
7. To enter the displayed
scale, press the ENTER button.
The following
message will be displayed briefly and the
instrument
will return to the previous operatmg state.
ENTERED
Note: Alpha value 0.00392 and 'C are the factory default
power-up
conditions.
If it is desired to have the alternate
alpha value and/or "F on
dition(s)
using Program T
ower-up, select the alternate con-
EMP followed by 1'rr)g:r.m~ 'JO to
save it (see paragraph
2.8.9).
2.8.3 Program
AC + DC (Low Frequency
AC)
Program AC + DC configures the Model lY3A to make lo!\
frequency
(0.1 to 10H.z) TRMS
AC
+
DC voltage
measurements
at 3%d resolution.
Keep in mind that the
ACV option
does not have to bc installed
for these
measurements.
Perform the following
steps to USE this
program:
1. Press the PRGM button.
The following
prompt
will
be-displayed:
PROGRAM?
2. Press the fiC+DC
button
The displayed reading will be
accompamed
by the mnemomc
' LO VA+D".
3. Select a range that is appropriate
for the anticipated
measurement.
It is recommended
that AUTC range not
be used.
4. Connect the signal to be measured to the input of the
Model 193A.
2-25
Advertisement
Table of Contents
