Denso BHT-4000 User Manual page 72

[ 5.3 ] Key entry test
TEST KEY
The table below shows the relationship among the keys, the identifier letters to be
displayed on the LCD, and the frequencies (Hz) of the beeper.
Key Letter Beeper
(Hz)
F1 A 261
F2 B 293
F3 C 329
F4 D 349
F5 E 391
SF _ 440
F6 F 493
F7 G 523
TEST KEY
ABCDE_FGH
7894561230.
IJ=
Selecting "Key" on the TEST MENU displays
the screen shown at left and makes the BHT-
4000 ready for entry from the keypad.
Pressing individual keys displays the identi-
fier letters in the positions preassigned to
those keys on the LCD and sounds the
beeper. (While the individual key is held
down, the beeper continues beeping.)
Pressing the same key again erases the dis-
played letter.
Key Letter Beeper
(Hz)
F8 H 587
7 7 659
8 8 698
9 9 783
4 4 880
5 5 987
6 6 1046
1 1 1174
After all keys are pressed and displayed on
the LCD, this test automatically ends and
the screen returns to the TEST MENU screen.
To stop this test in progress, turn the power
off and on.
62
Key Letter Beeper
(Hz)
2 2 1318
3 3 1396
0 0 1567
. . 1760
C I 1975
BS J 2093
ENT = 2349