ETS-Lindgren HI-4416 Numeric EMF Readout Unit - Manual (Page 20)

20 Operation www.ets-lindgren.com
Mode Select —Selects one of the four modes of the keypad matrix.
For maximum operating flexibility, the HI-4416 utilizes a matrix for the upper
three keypads on the membrane switch panel. The function that each key
controls depends on the location of the cursor block (the dark rectangle located
at the bottom edge of the LCD). When the HI-4416 is turned on, the cursor
automatically positions itself above the left most of the four function columns on
the control panel. In this mode, the functions assigned to the three top keypads
are Range, Max and Zero
Pressing the Mode Select keypad moves the cursor block to the right, allowing
access to the three functions in that column. Each successive activation of the
pad moves the cursor another position to the right. From the fourth, or right most
position, the cursor returns to the first position. This configuration allows a total of
twelve different functions to be assigned to the upper three keypads.
Range — Displays the measurement range currently in use, changes the range.
When this keypad is momentarily pressed, the HI-4416 commands the probe to
transmit the range currently in use. The system displays this range for two
seconds before returning to the measurement mode. Pressing this keypad again
(while the current range is still being displayed) signals the probe to switch to the
next range; the readout displays the new range. Continuing in this manner will
step through all available ranges. When the highest range is reached, pressing
the keypad again returns you to the lowest (most sensitive) range.
The LCD presents the range in the form r X, where X is a number.
Since all probes do not contain the same number of ranges, the
maximum value of X depends upon which probe is connected to the
system readout. Consult the probe literature to determine the ranges
available for a particular probe.
Max —Displays the maximum reading.
During field measurements, the processor continually monitors and stores the
highest measured field value. To recall and display this value, press the Max key.
The maximum reading, denoted by the Max indicator near the right edge of the
LCD, appears on the display. This reading remains as long as the Max key is
pressed. When the Max key is released, the LCD retains the reading for
approximately two seconds, after which the Max memory location is cleared and
a new maximum reading is accumulated.