Teledyne 3000TA-XLEU - Trace oxygen analyzer - Manual (Page 73)

Trace Oxygen Analyzer Operation
Teledyne Analytical Instruments 57
 Value of the alarm setpoint, AL–1 #### ppm (oxygen);
this value can be set from 0.00 to 10,000.00 ppm
 Out-of-range direction, HI or LO
 Defeated? Dft–Y/N (Yes/No)
 Failsafe? Fs–Y/N (Yes/No)
 Latching? Ltch–Y/N (Yes/No).
To define the setpoint, use the ◄► arrow keys to move the
blinking over to AL–1 #### . Then use the ▲▼ arrow keys to change the
number. Holding down the key speeds up the incrementing or
decrementing. (Remember, the setpoint units are ppm O
2
.)
To set the other parameters use the ◄► arrow keys to move the
blinking over to the desired parameter. Then use the ▲▼ arrow keys to
change the parameter.
Once the parameters for alarm 1 have been set, press Alarms again,
and repeat this procedure for alarm 2 ( AL–2 ).
To reset a latched alarm, go to Dft– and then press either ▲ two
times or ▼ two times. (Toggle it to Y and then back to N.)
—or—
Go
to Ltch– and then press either ▲ two times or ▼ two times.
(Toggle it to N and back to Y).
Web enabled instruments can set the alarm parameters from a
remote computer. See Section 5.3.
4.7 The Range Function
The Range function allows the operator to program up to three
concentration ranges to correlate with the DC analog outputs. If no
ranges are defined by the user, the instrument defaults to:
Low = 0–1 ppm
Med = 0–10 ppm
High = 0–100 ppm.
The Model 3000TA-XL-EU is set at the factory to default to
autoranging. In this mode, the microprocessor automatically responds to
concentration changes by switching ranges for optimum readout
sensitivity. If the current range limits are exceeded, the instrument will
automatically shift to the next higher range. If the concentration falls to