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pressed, the message “Invalid Passcode” is displayed and the instrument is re
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turned to the display mode that follows the function that was active when the
CAL Mode was entered.
Each individual instrument has its own unique passcode. The passcode number
is given on a notice provided with this instrument. The equipment manager is
responsible for keeping the passcode number stored in a proper location and
ensuring that it is not lost or forgotten. If necessary, the passcode can be re
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stored by contacting the manufacturer. To enter the passcode, use the Up and
Down buttons to set each digit of the passcode and the ENT button to move to
the next digit on the right. Press ENT twice when all digits are entered to move
to the next function. If the passcode is entered correctly, the next function in the
CAL Mode appears.
7.9.5 Date
This function displays the present date and allows it to be changed. This func
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tion is placed in the pass-code protected part of the CAL Mode since the cali
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bration due warning messages depend on the present date as well as the stored
due dates. Use the Up and Down buttons to set each date segment and the ENT
button to move between the date segments. Press ENT when all digits are en-
tered to save the changed values. The CLR button moves to the next function
without saving the changed values.
7.9.6 Probe Lock
This function locks or unlocks operation of the unit with the presently con-
nected probe only. To set probe lock, use the Up and Down buttons to select
ON or OFF and press the ENT button to store the selected setting and continue.
If probe lock is set to ON, the serial number of the currently attached probe is
stored. The instrument can only be used to display temperature with the probe
that was attached when the probe lock was set ON. If probe lock is ON and a
different probe is attached, the instrument returns to Blank Mode and displays
the message "Probe is locked". Measuring is disabled. Probe lock ON also dis
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ables access to the probe parameters that follow in the menu.
If probe lock is OFF, the instrument can be used with any probe. To lock the in
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strument with a new probe, set probe lock OFF, attach a new probe, and then
set probe lock ON again.
7.9.7 Prb #
This function displays the serial number of the probe and allows it to be set.
The probe serial number is stored in the INFO-CON probe connector. Use
the Up and Down buttons to set each digit and the ENT button to move to the
next digit on the right. Press ENT when all digits are entered.
1522 Handheld Thermometer Readout
User’s Guide
40