THCD-401 Instruction Manual
Page 37 of 47
Other commands
(a)
Date of last factory calibration – ‘dlc?’
This query is used to retrieve the date of the last factory calibration run. The data is returned as follows:
LAST CAL DATE: <yymmdd>
…where yy = year, mm = month & dd = day.
E.g. 051201 means the last calibration run was 1st December 2005.
(b)
User input rezero – ‘irz’
To perform a user input rezero function, use this command. The command can take two parameters, although
only one is required to perform the function and that is the input channel number (1-4). The optional second
parameter is ‘0’ and this clears any value already generated by a previous rezero for a specific input channel.
To find the current user rezero values for all input channels. use the query ‘irz?’. The data returned is one line
for each input channel and is as follows:
CH<x> REZERO: <rezero>
…where…
<x> = the input channel number
<rezero> = the current rezero value
(c)
Retrieve all settings – ‘ras’
As well as issuing some of the above commands as queries to retrieve individual settings, this command has
been provided which will return a comma separated list of most of the settings for all channels, setpoints, etc.
The exact settings provided by this command are detailed in Table 3 in Appendix C.
