Model 78 and 78-1
Technical Manual
Section 8
Ludlum Measurements, Inc.
Page 8-1
March 2021
Instrument Setup
Entering or Changing Switch Board Parameters
On the switch board, select the desired parameter to enter or change by using the
corresponding
FUNCTION
switch position. Depress the
ENTER
button, and a character on
the LCD will start to flash. The flashing character indicates that the program is in the
parameter change mode.
To change the character, press the
UP
button until the desired variable is reached. To shift
to another character, increment the
LEFT
pushbutton until the desired character is
reached. The
LEFT
pushbutton switch enables the operator to sequence through all the
characters on the LCD associated with a particular parameter.
Once the desired data is entered, depress the
ENTER
button. The LCD characters should
stop flashing, and the new parameter data should display.
To read pre-programmed setup parameters, switch the
FUNCTION
switch to position
A
and select the pre-programmed detector setup number, using the parameter change
procedure above. Once the detector setup number is entered, sequence through the
parameters by varying the function switch to read the variables for that specific detector
number.
Note:
Once the detector setup number has been entered, the function switch can be
rotated either direction to view the parameter variables.
T
HE
F
UNCTION
S
WITCH
FUNCTION Switch
: a 16-position rotary switch labeled “0-9” and “
A
-
F
.” This switch
selects a parameter setup mode for the Model 78. The selector switch must be set to the
“0” position for normal instrument operation.
Section
8
