RS232 Digital Muilti-Meter DT-4000ZC

The Meter

Although "generic" MS Windows software was provided on CD, it only supported serial ports COM1 to COM4 and, since I needed to a USB to RS232 Serial Adapter, which appears as COM5, it proved to be unusable. The interface is also "one-way" ie. from the DMM to the computer, controlled by the "RS232" button on the DMM. Hence the easiest way to capture data logged by the DMM was to connect with GtkTerm, let the DMM "free-run" for the required time and then save the data as a "raw" file. This file could then be post-processed and converted to a "human-readable" (or "spreadsheet importable") text file.

My 'C' post-processor for Linux

trevor@BlueElf:~/dmm4000ZCtools$ ./src/raw2txt
raw2txt.c Version 0.01 {Exp}, [20/10/2015], (c) F_Trevor_Gowen
                <--| Package dmm4000ZCtools_0.0 |-->
Usage raw2txt [path/]in_filename[.raw] [options]
Options: -o out_filename_prefix,
         -a arg_filename[.arg],
         -E   {Echo command-line arguments},
         -O   {auto-generate Out_filename},
         -Q   {Quiet - default},
         -V   {Verbose},
         +XD  {heX Dump of raw & de-synched data to terminal}

trevor@BlueElf:~/dmm4000ZCtools$ ./src/raw2txt ./examples/DMM_AutoDegC_2400-8-N-1.raw -V
raw2txt.c Version 0.01 {Exp}, [20/10/2015], (c) F_Trevor_Gowen
                <--| Package dmm4000ZCtools_0.0 |-->
<raw2txt.arg>   fopen: No such file or directory
raw2txt.arg not found
./examples/DMM_AutoDegC_2400-8-N-1.raw -V 
Argfile: raw2txt.arg
Rawfile: ./examples/DMM_AutoDegC_2400-8-N-1.raw
Outfile: stdout
Initialisation test ...
 0.000    V  DC AUTO RS232
Synched at 1'th. byte, Raw = 0x13, Data = 0x03
Frame#0001 - Rawbytes:  0x13 0x27 0x3d 0x45 0x5b 0x65 0x7b 0x8d 0x9b 0xa0 0xb0 0xc0 0xd0 0xe4 
Frame#0001 - Databytes: 0x03 0x07 0x0d 0x05 0x0b 0x05 0x0b 0x0d 0x0b 0x00 0x00 0x00 0x00 0x04 
First frame decode test ...
 022.2     C AUTO RS232
Clean up test ...
022.2 C AUTO RS232

trevor@BlueElf:~/dmm4000ZCtools$ ./src/raw2txt ./examples/DMM_AutoDegC_2400-8-N-1.raw +XD | more
<raw2txt.arg>   fopen: No such file or directory
raw2txt.c Version 0.01 {Exp}, [20/10/2015], (c) F_Trevor_Gowen
                <--| Package dmm4000ZCtools_0.0 |-->
raw2txt.arg not found
Argfile: raw2txt.arg
Rawfile: ./examples/DMM_AutoDegC_2400-8-N-1.raw
Outfile: stdout
Synched at 1'th. byte, Raw = 0x13, Data = 0x03
First frame decode test ...
 022.2     C AUTO RS232
Clean up test ...
022.2 C AUTO RS232
Frame#0002 - Rawbytes:  0x13 0x27 0x3d 0x45 0x5b 0x65 0x7b 0x8d 0x9b 0xa0 0xb0 0xc0 0xd0 0xe4 
Frame#0002 - Databytes: 0x03 0x07 0x0d 0x05 0x0b 0x05 0x0b 0x0d 0x0b 0x00 0x00 0x00 0x00 0x04 
Frame#0003 - Rawbytes:  0x13 0x27 0x3d 0x45 0x5b 0x65 0x7b 0x8d 0x9b 0xa0 0xb0 0xc0 0xd0 0xe4 
Frame#0003 - Databytes: 0x03 0x07 0x0d 0x05 0x0b 0x05 0x0b 0x0d 0x0b 0x00 0x00 0x00 0x00 0x04 
Frame#0004 - Rawbytes:  0x13 0x27 0x3d 0x45 0x5b 0x65 0x7b 0x8d 0x9b 0xa0 0xb0 0xc0 0xd0 0xe4 
Frame#0004 - Databytes: 0x03 0x07 0x0d 0x05 0x0b 0x05 0x0b 0x0d 0x0b 0x00 0x00 0x00 0x00 0x04 
Frame#0005 - Rawbytes:  0x13 0x27 0x3d 0x45 0x5b 0x65 0x7b 0x8d 0x9b 0xa0 0xb0 0xc0 0xd0 0xe4 
Frame#0005 - Databytes: 0x03 0x07 0x0d 0x05 0x0b 0x05 0x0b 0x0d 0x0b 0x00 0x00 0x00 0x00 0x04 
Frame#0006 - Rawbytes:  0x13 0x27 0x3d 0x45 0x5b 0x65 0x7b 0x8d 0x9b 0xa0 0xb0 0xc0 0xd0 0xe4 
Frame#0006 - Databytes: 0x03 0x07 0x0d 0x05 0x0b 0x05 0x0b 0x0d 0x0b 0x00 0x00 0x00 0x00 0x04 
Frame#0007 - Rawbytes:  0x13 0x27 0x3d 0x45 0x5b 0x65 0x7b 0x8d 0x9b 0xa0 0xb0 0xc0 0xd0 0xe4 
Frame#0007 - Databytes: 0x03 0x07 0x0d 0x05 0x0b 0x05 0x0b 0x0d 0x0b 0x00 0x00 0x00 0x00 0x04 
Frame#0008 - Rawbytes:  0x13 0x27 0x3d 0x45 0x5b 0x65 0x7b 0x8d 0x9b 0xa0 0xb0 0xc0 0xd0 0xe4 
Frame#0008 - Databytes: 0x03 0x07 0x0d 0x05 0x0b 0x05 0x0b 0x0d 0x0b 0x00 0x00 0x00 0x00 0x04 
Frame#0009 - Rawbytes:  0x13 0x27 0x3d 0x45 0x5b 0x65 0x7b 0x8d 0x9b 0xa0 0xb0 0xc0 0xd0 0xe4 
Frame#0009 - Databytes: 0x03 0x07 0x0d 0x05 0x0b 0x05 0x0b 0x0d 0x0b 0x00 0x00 0x00 0x00 0x04 
Frame#0010 - Rawbytes:  0x13 0x27 0x3d 0x45 0x5b 0x65 0x7b 0x8d 0x9b 0xa0 0xb0 0xc0 0xd0 0xe4 
Frame#0010 - Databytes: 0x03 0x07 0x0d 0x05 0x0b 0x05 0x0b 0x0d 0x0b 0x00 0x00 0x00 0x00 0x04 
Frame#0011 - Rawbytes:  0x13 0x27 0x3d 0x45 0x5b 0x65 0x7b 0x8d 0x9b 0xa0 0xb0 0xc0 0xd0 0xe4 
Frame#0011 - Databytes: 0x03 0x07 0x0d 0x05 0x0b 0x05 0x0b 0x0d 0x0b 0x00 0x00 0x00 0x00 0x04 
--More--

trevor@BlueElf:~/dmm4000ZCtools$ ./src/raw2txt ./examples/DMM_AutoDegC_2400-8-N-1.raw -O
raw2txt.c Version 0.01 {Exp}, [20/10/2015], (c) F_Trevor_Gowen
                <--| Package dmm4000ZCtools_0.0 |-->
<raw2txt.arg>   fopen: No such file or directory
raw2txt.arg not found
Argfile: raw2txt.arg
Rawfile: ./examples/DMM_AutoDegC_2400-8-N-1.raw
Outfile: ./examples/DMM_AutoDegC_2400-8-N-1.txt
Synched at 1'th. byte, Raw = 0x13, Data = 0x03
First frame decode test ...
 022.2     C AUTO RS232
Clean up test ...
022.2 C AUTO RS232
263 frames converted.

trevor@BlueElf:~/dmm4000ZCtools$ more ./examples/DMM_AutoDegC_2400-8-N-1.txt
022.2 C AUTO RS232
022.2 C AUTO RS232
022.2 C AUTO RS232
022.2 C AUTO RS232
022.2 C AUTO RS232
022.2 C AUTO RS232
022.2 C AUTO RS232
022.2 C AUTO RS232
022.2 C AUTO RS232
022.2 C AUTO RS232
022.2 C AUTO RS232
022.2 C AUTO RS232
022.2 C AUTO RS232
022.2 C AUTO RS232
022.3 C AUTO RS232
022.4 C AUTO RS232
022.7 C AUTO RS232
023.1 C AUTO RS232
023.7 C AUTO RS232
024.3 C AUTO RS232
024.9 C AUTO RS232
025.5 C AUTO RS232
026.0 C AUTO RS232
026.5 C AUTO RS232
027.0 C AUTO RS232
027.4 C AUTO RS232
027.8 C AUTO RS232
028.1 C AUTO RS232
028.4 C AUTO RS232
028.8 C AUTO RS232
029.0 C AUTO RS232
--More--(11%)

---