Product Manual

8
Connections
The headphone jack has a water resistant cover. Lift open to plug
in a stereo phone plug to listen with a headset in noisy environ-
ments.
Replace a blown fuse with a 1/4 amp slow blow.
Use the included RS-232
cable to connect the MUL
to a computer.
To run on external power
or to charge the battery in
the field, connect the exter-
nal DC power cable to the
POWER connector. Con-
nect the other end clips to a
12 to 15 Volt DC power
source. Red to positive and
Black to negative.
The sensor cable is con-
nected to the SENSOR
connector.
9
RS-232 Interface
COM Port settings:
Baud rate 9600
Bits 8
Parity NO
Stop bit 1
Flow Control None
Program:
Use Hyper Terminal or custom software to communicate. Turn off echo. The
unit will echo any character it receives to verify communication.
Commands:
v Lowers volume
V Raises volume
g Increases range (lower gain)
G Decreases range (raise gain)
b, B Check battery voltage
r Turns OFF status report
R Turns ON status report
? Causes a status report to be sent
l Specifies short status report
L Specifies long status report
d Turns off debug mode
D Turns on debug mode
z Zero + 1 step per command
Z Zero - 1 step per command
a, A Initiate auto zero
s, S Toggle sample rate
Report String Description:
Long version using send character = “L”, Total characters = 58
$SIG=_±XXXE-X,_GAIN=_X,_BAT=_XXXE-1,_VOL=_X,_Z=_XXX,_A=_X!
Short version using send character “l” (lower case L), Total characters=22
$SIG=_±XXXE-X,_GAIN=_X
Underscore in string represents a SPACE character. It is not output as an un-
derscore but as a space.
Example: $SIG= ±XXXE-X, GAIN= X, BAT= XXXE-1, VOL= X, Z= XXX, A= X!