15
OPERATION - 4
Martek Instruments, Inc.
in regards to operation of the Mark 22.
To select a SETUP option, the user must
depress the
SELECT
key. To move the flash-
ing prompt up or down to another option,
you would press either the
UP
or
DOWN
arrow keys. To exit from the Setup Option
Menu the user must depress the
EXIT
key.
which will return the Mark 22 to the normal
display monitoring mode. The options pre-
sented in the
SETUP
menu are discussed in
Section 4.2 and in the chapter on CALIBRA-
TION. For now, simply depress the
EXIT
key.
In the Setup Mode of operation the top row
of keys function as indicated by the yellow
text located on the top line of text on each of
the function keys.
4.1.3 Cell Mode
The
CELL
Key allows you to change the
cell constant currently used by the Mark 22
to any of three different, preset cell constants
simply by pressing the appropriate function
key whose cell constant value is labeled in
blue. Press the
CELL
key. The Mark 22 will
respond with a display similar to the one pic-
tured below:
To change this cell constant, simply press
one of the function keys. Pressing a function
key while in the Cell Mode will change the
K factor used to calculate the raw and tem-
perature-compensated
conductivity
mea-
surements. While the nominal cell constant
values listed on the function keys are 0.01,
0.1, 1, and 10, you can change any of these
cell constants to whatever value is desired.
Refer to Section 4.2 on how to change indi-
vidual cell constants. To return to the moni-
toring mode, press the
CELL
key again. In
the Cell Mode of operation the top row of
keys functioon as indicated by the blue text
located on the second line of text on each of
the function keys. The
K 0.01 Key
selects the
cell constant for Cell #1, the
K 0.1 Key
se-
lects the cell constant for Cell #2, the K 1 key
selects the cell constant for Cell #3 and the K
10 Key selects the Cell constant for Cell #4.
The Cell Screen appears as follows:
4.1.4 Data Log Mode
In the Log Mode of operation the top row
of keys function as indicated by the red text
located on the third line of text on each of
the function keys. The
FREE Key
will dis-
play the amount of storage memory remain-
ing in terms of hours. The amount of data
stored is directly related to the scan rate used
during the logging operation. The
PAUSE
Key
will suspend the logging function, and
the
RESUME Key
will restart it. The
CLEAR
Key
will clear all of the logged data from the
unit's internal memory. The
LOG
key is one
of two operational mode keys on the Mark
22 membrane panel outlined in RED. When
the log Key is depressed, the function ( la-
beled in red ) on each of the function keys
becomes applicable. After the
LOG
key is de-
pressed, the Mark 22 will display the follow-
ing screen:
CURRENT LOG FILE
IS FILE # 01
CELL #1
CELL #2
CELL #3
CELL #4
CURRENT CELL #1
IS K .01000
