2 Installation
The data sent is status information, in digital form, updated every two
seconds. Status is reported in the following order:
•
The concentration in percent
•
The range is use (HI< MED< LO)
•
The span of the range 0-100%, etc)
•
Which alarm - 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 2-4.
Table 2-4: Commands via RS-232 Input
Command
Description
as<enter>
Immediately starts an autospan.
az<enter>
Immediately starts an autozero.
st<enter>
Toggling input. Stops/Starts any status message output
from the RS-232, Until st<enter> is sent again.
The RS-232 protocol allows some flexibility in its implementation.
Table 2-5 lists certain RS-232 values that are required by the 6000B/6020.
Table 2-5: Required RS-232 Options
2-8: Part I
RD
2
TD
3
DTR
4
COM
5
DSR
6
RTS
7
CTS
8
RI
9
Parameter
Setting
Baud
2400
Byte
8 bits
Parity
none
Stop Bits
1
Message Interval
2 seconds
Teledyne Analytical Instruments
Received Data
Transmitted Data
Data Terminal Ready
Common
Data Set Ready
Request to Send
Clear to Send
Ring Indicator
Model 6020