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The protocol for serial communications is 8 data bits, 1 stop bit, and no parity.
Use no flow control. The baud rate is fixed at 2400, the linefeed to ON (all car
-
riage returns are followed by a linefeed (ASCII decimal 10)), and the duplex to
HALF disabling echo.
The serial port can be used to transmit measurements to a computer or printer.
It can also be used to change settings of the instrument from a computer or in
-
terface with software. A full list of commands follows in Section 8.2.
Commands sent to the instrument must end with an EOS character which is a
carriage return (ASCII decimal 13) or linefeed character (ASCII decimal 10).
Commands can be sent with upper or lower case letters. Data returned from the
instrument ends with a carriage return and a linefeed.
8.2 Communication Command List
8.2.1 Primary Commands
The following group of commands read or set various functions.
Description Command Example
Response
Format
Response
Example Range
Read measurement, extended
format
t[emperature] t t: 999.999
{C,O,F,R,orK}
mm-dd-yyyy
hh:mm:ss
t: 125.745 C
03-01-1999
15:49:15
Read measurement, simple
format
f[etch?]
rea[d?]
me[asure?]
fetch?
read?
meas?
t: 999.999
{C,O,F,R,orK}
t: 25.587 C
Read minimum m[inimum] min min: 999.999
{C,O,F,R,orK}
min: -14.653 C
Read maximum ma[ximum] max max: 999.999
{C,O,F,R,orK}
max: 416.781 C
Clear minimum and maximum cl[ear] clear
Read data labels
Note: This command also
sets the autolog label.
lbnn lb01 lb99: xxxxxxxx Lb01: BATH
Set data labels lbnn=[nnnnnnnn] lb01=ENG 0 to 9, A to Z,
-, _, .
Initiate download of demand
logged data
ddem ddem
Clear demand logged data dclr dclr
Read the number of demand
logged readings currently in
memory
dlog dl dl: 999 dl: 51
Read number of readings in
autolog memory
alog alog log:9999 log:10
1522 Handheld Thermometer Readout
User’s Guide
48