Martel Electronics 320 - Manual (Page 13)

pressure). A barometric standard of at least .025%
accuracy should be used to determine atmospheric
pressure. When entering this value, proper decimal
place entry must be observed.
The “Zero” key is inactive during user calibration.
Only numeric entry (9) is active in this mode.
MIN/MAX KEY
The Model 320 calibrator constantly monitors the
displayed readings and stores the minimum and
maximum values internally.
Pressing the Min/Max key will cause the minimum
and maximum values to be displayed. The maximum
values will be displayed on the top line and the
minimum values will be displayed on the bottom line.
Pressing the Min/Max key a second time will return
the Model 320 to a normal display mode and will reset
the minimum and maximum values to the current
reading.
The minimum and maximum values are also reset
whenever a new function or engineering unit is
selected.
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