Teledyne 3000PB - Bulkhead mount percent oxygen analyzer - Manual (Page 36)

3 Installation Model 3000PB
3-10 Teledyne Analytical Instruments
• The range in use (HI, MED, LO)
• The span of the range (0-100 %, etc)
• Which alarms—if any—are disabled (AL–x DISABLED)
• Which alarms—if any—are tripped (AL–x ON).
Each status output is followed by a carriage return and line feed.
Three input functions using RS-232 have been implemented to date.
They are described in Table 3-4.
Table 3-4: Commands via RS-232 Input
Command Description
as Immediately starts an autospan.
az Immediately starts an autozero.
co Reports “Raw Cell Output” (current output of the sensor
itself) in
μA. For example—
Raw Cell Output: 99
μμμμμA
st Toggling input. Stops/Starts any status message output from
the RS-232, until st is sent again.
The RS-232 protocol allows some flexibility in its implementation.
Table 3-5 lists certain RS-232 values that are required by the 3000PB imple-
mentation.
Table 3-5: Required RS-232 Options
Parameter Setting
Baud 2400
Byte 8 bits
Parity none
Stop Bits 1
Message Interval 2 seconds
3.3.9 Remote Sensor and Solenoid Valves
The 3000PB is a single-chassis instrument, which has its own sensor
and, in the –C option, its own gas-control solenoid valves. However, The
REMOTE SENSOR and SOLENOID RETURN connectors are provided
for use with a remote sensor and/or sampling system, if desired. See Figures
3-7 and 3-8.