Appendix B. EC9800 Protocol
The following commands are supported:
DCONC
Function: Sends the current instantaneous concentration data to the serial port
Format: DCONC {<DEVICE I.D.>} {TERMINATOR}
Device response: {GAS}<SPACE>{STATUS WORD}<CR><LF>
All numbers are in floating point format. The STATUS WORD indicates the instrument status in hex
using the following format:
Bit 15 = SYSFAIL (MSB)
Bit 14 = FLOWFAIL
Bit 13 = LAMPFAIL
Bit 12 = CHOPFAIL
Bit 11 = CVFAIL
Bit 10 = COOLERFAIL
Bit 9 = HEATERFAIL
Bit 8 = REFFAIL
Bit 7 = PS-FAIL
Bit 6 = HV-FAIL
Bit 5 = OUT OF SERVICE
Bit 4 = instrument is in zero mode
Bit 3 = instrument is in span mode
Bit 2 = unused
Bit 1 = SETPPM selected, CLEARMG/M3
Bit 0 = reserved (LSB)
DSPAN
Function: Commands the unit under test to enter the span mode and stay there
Format: DSPAN {<DEVICE I.D.>} {TERMINATOR}
Device response:
<ACK> if the unit under
test is able to perform the command, <NAK> if
not
DZERO
Function: Commands the unit under test to enter the zero mode and stay there
Format: DZERO {<DEVICE I.D.>} {TERMINATOR}
Device response:
<ACK> if the unit under
test is able to perform the command, <NAK> if
not
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