Fluke Hart Scientific 1575 Super-Thermometer User Manual page 89

7 Front Panel Operation
Display Menu
Press Enter to select the desired parameter for the specified field. For some pa-
rameters, such as history, you may have to specify additional information, like
the location number, in another window that appears. The data display parame-
ter options are described below.
(1) HISTORY
This option will show past measurements. You can select which history mea-
surement to display. HISTORY(1) refers to the last measurement, HISTORY(2)
refers to the measurement before that and so on. Up to 100 past measurements
are available for viewing. As new measurements are made, past measurements
will be shifted down in the history buffer and the history field will be updated
accordingly.
(2) MEMORY
This option will show data that is stored in a specified memory location. For
storing data in memory, refer back to Section 7.3.1. When you select this op-
tion, you will be prompted to enter a memory number. Up to 100 memory loca-
tions are available.
(3) T-MEMORY
This option displays the difference between the present measurement and the
value stored in a specific memory location. This is useful for comparing mea-
surements to a reference temperature. For storing data in memory, refer back to
Section 7.3.1. When you select this option, you will be prompted to enter a
memory number. There are 100 memory locations. If there is a conflict be-
tween the units of the T value and the MEMORY value, ".........." will be
displayed.
(4) T-HISTORY
This option displays the difference between the present measurement and a pre-
vious measurement in the history buffer. This can be used to calculate the rate
at which the temperature is changing. When you select this option, you will be
prompted to enter the history number. HISTORY(1) refers to the last measure-
ment, HISTORY(2) refers to the measurement before that and so on. Up to 100
past measurements are available for viewing. If there is a conflict between the
unitsof the T value and the HISTORY value, ".........." will be displayed.
(5) T(1)-T(2)
This option displays the difference between Input 1 and Input 2. This is useful
when measuring the accuracy of one probe against another. It will use the most
recent measurements made on the two channels regardless of how long ago
they were made. To keep the measurements accurate, you should sample both
channels periodically. To do this automatically, use the alternating channel
mode as explained in Section 7.1.3.
(6) T(2)-T(1)
This option displays the difference between Input 2 and Input 1. This is just the
reverse of the above option.
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