Teledyne 6400EH - Sulfur Dioxide Analyzer - Manual (Page 40)

Operating Instructions Model 6400EH
Teledyne Analytical Instruments 28
6.2.4 Default iDAS Channels
The default Data Channels included in the 6400EH analyzer’s
software include the
CONC, PNUMT
&
CALDAT
channels. The
FAST
&
DETAIL preset channels are not included.
6.2.5 Remote Operation Using the External Digital I/O
6.2.5.1 S TATUS O UTPUTS
The function and pin assignment5s for the 6400EH digital status
outputs are:.
Table 6-5: Status Output Signals
STATUS
CONNECTOR
PIN NUMBER
1
STATUS
DEFINITION
CONDITION
1 SYSTEM OK ON if no faults are present.
2 CONC VALID
OFF any time the HOLD OFF feature is active, such
as during calibration or when other faults exist
possibly invalidating the current concentration
measurement (example: sample flow rate is outside
of acceptable limits).
ON if concentration measurement is valid.
3 HIGH RANGE ON if unit is in high range of the AUTO Range Mode
4 ZERO CAL
ON whenever the instrument’s ZERO point is being
calibrated.
5
HIGH SPAN CAL
ON whenever the instrument is set for DUAL or
AUTO
reporting range
mode an it’s high range span point is being calibrated
.
6 DIAG MODE
ON whenever the instrument is in DIAGNO STIC
mode
7 LOW SPAN CAL
ON whenever the instrument is set for DUAL or
AUTO
reporting range mode an it’s lows range span
point is being calibrated .
8 SPARE
D EMITTER BUS
The emitters of the transistors on pins 1-8 are bussed
together.
SPARE
+ DC POWER
+ 5 VDC, 300 mA source (combined rating with
Control Output, if used).