Martel Electronics 320 - Manual (Page 17)

Once the proper zero and full scale values have been
entered, the operator presses the % key to activate the
percent function. The zero and span adjustments to
the transmitter can now be quickly adjusted by
applying aproximately 0% and 100% inputs to the
transmitter as shown on the display, and adjusting the
output for 0% error as shown on the display.
After the zero and span adjustments have been made,
the linearity can be quickly checked by applying
various intermediate inputs and noting the error
directly in percent. If there is no error, 0% will be
displayed for any pressure input.
The application note on page 45 gives examples for
using the percent function.
Pressing the % key a second time will return the
display to the selected engineering units. The percent
mode is also terminated if a new function or
engineering unit is selected.
TRIP RESET KEY
The Trip Rst key is used in conjunction with the trip
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