7. To open the connection window and start using the serial line, select Open.
If PuTTY is unable to open the serial port you selected, it shows you an error
message instead. If this happens, restart PuTTY and check the settings.
4.5 List of Serial Commands
All commands can be issued either in uppercase or lowercase.
The notation <cr> refers to pressing the carriage return (ENTER) key on your computer
keyboard. Enter a <cr> to clear the command buer before starting to enter commands.
Whenever you change any of the parameters and want to store the changes permanently, use
the SAVE command.
Table 6 List of Serial Commands
Command Description
? Show transmitter information
acal Calibrate analog outputs
aerr Set/show analog output error levels
aout Show analog output status
asel Set/show analog output quantities and scaling
atest Test analog outputs
calcs Set/show measured quantities
cdate Set/show calibration date
crh Calibrate probe RH
crhclr Restore probe RH factory calibration
ct Calibrate probe T
ctclr Restore probe T factory calibration
ctext Set/show calibration info
dsel Set/show displayed quantities
echo Set/show terminal echo mode
env Set/show environmental parameters
errs Display active errors
form Set/show output formatting
HMT120 User Guide M211244EN-C
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