Martek Instruments Mark 25 - Setting the Password

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recorder output to the new range.
When the auto-ranging function is ON,
the assigned analog output will remain
in the range it was assigned to.
When the RS232 digital output is used,
calibration is not necessary. However,
the receiving computer must be set up
to accommodate the Mark 25’s digital
output configuration:
Baud Rate - 9600
Parity - Even
Word length - 7
Stop Bit - 1
A communication program such as
PROCOMM or Microsoft HYPERLINK
can be used to write data from the Mark
25 to a computer file which can then be
imported into a spreadsheet program
such as EXCEL or LOTUS NOTES.
The data will be displayed in the
following format:
ID, Chan, Temp. Raw Cond., TC Cond.
3.7 Setting the Password
The Mark 25 can be assigned a numeric
password to prevent unauthorized
personnel from changing any of the
settings.
Press the <CALIB> until the display
indicates the password prompt, PAS.
Next, press the <UP ARROW> key. The
display will prompt with 1999 and all
parameter LED’s will be lit and flashing.
Use the <UP> or <DOWN ARROW>
keys to change the displayed value to
any number other than 0. When the
desired value has been reached, press
the <CALIB> key to set and activate the
password.
Once the password is enabled, the
display will default to 1999 whenever the
password prompt is selected. To gain
access to any other function, you must
use the arrow keys to scroll to the
correct value password then press the
<CALIB> key.
To disable the password, use the <UP
ARROW> key to move the value to 0
then press the <CALIB> key. The
password function will then be disabled.
3.8 Setting the ID Number
The Mark 25 can be assigned a three
digit numeric ID number that will be
displayed on the digital output.
Press the <CALIB> until the display
indicates the user prompt, uSr. Next,
press the <UP ARROW> key. The
display will prompt with id and all
parameter LED’s will be lit and flashing.
When the <CALIB> is pressed, the Mark
25 will display 000. To assign an ID
number, use the <UP> or <DOWN
ARROW> keys to change the displayed
value to any number other than 000.
When the desired value has been
reached, press the <CALIB> key to set
the ID number.
To disable the ID number, use the <UP
ARROW> key to move the value to 000
then press the <CALIB> key. The ID
function will then be disabled.
3.9 Changing the Serial Output
The Mark 25 provides a standard
RS232 digital output. This output can be
configured in one of two ways: