16
4 - OPERATION
Martek Instruments, Inc.
By pressing the
RESUME
key, the Mark
22 will start sending data to the printer.
Pressing the
PAUSE
key will stop the print-
ing. Pressing the
RESUME
key will resume
printing. Pressing the
FREE
key will show
how many scans or lines of data remain in
that particular file. Finally, pressing the
CLEAR
key will increment the Mark 22 to
the next file to be printed. To exit the print-
ing mode, simply press the
key again.
Information on how to set up your computer
or printer to communicating with the Mark
22 can be found in Section 4.2.
4.2
H
OW
TO
S
ET
U
P
THE
S
YSTEM
This section describes the operation of
the Mark 22 in the Setup Mode. However,
the calibration procedures for temperature,
conductivity, and pH are extensive, so Chap-
ter 5 has been dedicated to the calibration of
the Mark 22. The other three options on the
initial Setup Menu are COMP, CELL, and
LOG. Pressing the UP ARROW will move
the flashing display from CAL to COMP,
from COMP to CELL, from CELL to LOG,
and from LOG to CAL. The DOWN ARROW
moves the flashing display up through the
menu. When the desired operation is flash-
ing, press the SELECT key. To return to the
Display Mode, press EXIT.
08.64 ScpH
pH 08.52 27.56° M
PRINTER READY ?
FILE # 01
Depress the
LOG
key to return to the to
the normal display monitoring mode. How-
ever, a black square will be visible in the top
right-hand corner of the display similar to
the display shown below:
The
Black Square
indicates that the Mark
22 is in the data LOG mode of operation.
Pressing the FREE key will display the
amount of memory remaining for data stor-
age in terms of logging hours remaining and
then return to Log Mode. The LOG mode
may be paused by depressing the PAUSE
key. Logging will be suspended until the RE-
SUME key is depressed. The upper right cor-
ner of the display will show a letter
" p
" in-
stead of the black square when the Mark 22
is in the paused state of the Log Mode.
To stop logging, simply press the
LOG
key again. The next time you press the
LOG
key, the Mark 22 will increment the internal
file counter and start logging data in the new
file number. This feature allows you to as-
sign different files to different monitoring
points. Refer to Section 4.2 on how to set up
the Mark 22 for logging at predetermined
times and intervals.
4.1.5
Print Mode
The
key is identified by its RED
key legend. When this key is depressed, the
the top row of function keys operate as indi-
cated by the RED legend located on each key.
The Mark 22 will always send the displayed
data information to the printer port under
normal conditions. Pressing the
key
will allow the Mark 22 to print what has been
stored in memory when it is hooked up to a
computer or printer. Pressing the
key
will provide the following:
4.2.1
Temperature Compensation
Formulas
When utilizing conductivity and pH sen-
sors in ultrapure water, compensation formu-
las for temperature and sample water impu-
rities must be considered since sample
