Epson XDT manual Display Conventions, 12 3 4 5 6 7 8, Push Buttons

XDT User’s Manual

3.4.2 Display Conventions

1.To display characters with the 7 segment numeric display, the following pseudo-alphanumer- ics are used:

Numbers:

0 12 3 4 5 6 7 8 9

0 1 2 3 4 5 6 7 8 9

Letters:

ABCDEF GH IJ LNOP QRS TUXYZ

A B C D E F G H I J L N O P Q R S T U X Y Z

Symbols:

?- .

?- .

2.The instrument will indicate whether a particular mode allows changing a parameter by show- ing the word “SET” in the upper left corner of the display. Be careful not to change any parameter inadvertently.

3.°C°F appear simultaneously, to indicate the sensors’ attenuation in decibels.

4.Values larger than ±1999 or smaller than ±0.01 are displayed in powers of 10 ±3 . As required, either a “10 3” or “10-3” will appear above and to the right of the displayed value, the value will be rounded off to 3½ digits. The display will show RNG (out of ranGe), if the number to be displayed is larger than 1,999,000. Twelve examples follow; for each the number and units desired to be displayed are shown in italics, depicted immediately below them is the resultant 3½ digit LCD display:

+20°C +68°F 23,612 ppmV

1104.2

lbs H2O/mmSCF

			x10 3
	°C	°F	PPM
DEWPOINT	DEWPOINT	DEWPOINT	DEWPOINT	LBS

17.688
grams H2O/meters3	2,000,000		-100°C	-148°F
DEWPOINT G/M3			°C	°F
			DEWPOINT	DEWPOINT
0.013,849	0.000,921,15		0.000,014,75
	lbs H2O/mmSCF		grams H2O/meters3	0.000,000,1
ppmV
x10-3		x10-3	x10-3
PPM
DEWPOINT	DEWPOINT	LBS	DEWPOINT G/M3

3.4.3 Push Buttons

Four push buttons provide user control of the instrument. They are designated MODE, UP, DOWN and PRESSURE CORRECT. These push buttons are vertically lined up on the upper left side of the bare circuit board, with the MODE button on top. There is also a connector provided which allows the use of external switches. The XDT-NEMA makes use of the circuit board mounted push-button switches, to access them one must open the cover of the XDT-NEMA enclosure. The XDT-PM is available in several versions:

•With a solid silk screened front face plate, which must be removed to access the circuit board

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