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3 Installation Model 3190
3-6
Teledyne Analytical Instruments
Figure 3-2: Contact ID for FAILSAFE Relay Operation
The specific descriptions for each type of alarm are as follows:
HI Alarm Configured as high alarm (actuates when concentration is
above threshold). Can be set anywhere within the full
range of the analyzer (0-9,999 ppm), but must be set
ABOVE the threshold set for the LO Alarm.
LO Alarm Configured as low alarm (actuates when concentration is
below threshold). Can be set anywhere within the full
range of the analyzer (0-9,999 ppm), but must be set
BELOW the threshold set for the HI Alarm.
Sensor Fail Actuates when the output of the Micro-Fuel Cell sensor
falls below the acceptable level.
RS-232 Port: The digital signal output is a standard RS-232 serial
communications port used to connect the analyzer to a modem or other
digital device. Only the output mode is implemented in this instrument. The
data is oxygen concentration and range information in serial digital form.
The RS-232 protocol allows some flexibility in implementation in the
choice of values for certain parameters. Table 3-1 lists the RS-232 values
required by the 3190 implementation.
Table 3-1: Required RS-232 Options
Parameter Setting
Baud 2400
Byte 8 bits
Parity none
Stop Bits 1
Message Rate 2 per second
External Probe: The receptacle for the analysis unit cable is located in
the lower left-hand corner of the rear panel. The 6-pin Mini-Fit™ connector