Human Humalyzer 2000 - Keypad; Display; Serial Port

Rev. B 11
Keypad
The
keypad
is
a
sealed
membrane
switch
layer
which
is
not
serviceable.
You
can
test
the
keypad
by pressing AUX, then pressing all keys except CLEAR and ENTER. Note that each key
causes
the
instrument
to
beep
and
display
a
character.
Press
CLEAR
and
the
display
clears.
Press ENTER to end the test.
Display
The display is a 24 x 2 line super twisted nematic liquid crystal display module with integral
controller. The display should be clearly legible at all times, with no dark spots or stray dots.
There are no adjustments.
Serial Port
By using a special cable, a serial printer or computer with a serial port may be connected. This is
amale 9-pin DB-style connector using RS-232 signals in anon-standard pinout. The data format
is 2400 baud, 8 bits, 1 stop bit, and no parity.
The pinout for the serial port is:
1. GND
2 TX
3 RX/DTR
49 NC
Contact your distributor to obtain a serial printer cable.
Humalyzer 2000 Service Manual