Teledyne 3000ZA-3X - Trace oxygen analyzer - Manual (Page 54)

Operation 3000ZA-3X
Teledyne Analytical Instruments 42
Pressing ENTER causes the word HIGH or LOW to start flashing.
Then pressing UP or DOWN toggles between the 2 words. When HIGH,
the alarm will trip if O
2
concentration is above the setpoint as discussed
below.
4.6.3 Alarm Failsafe
-----------------------
->AL-1 FAILSAFE
-----------------------
Pressing ENTER causes the word FAILSAFE or NON-FAILSAFE to
start flashing. Then pressing UP or DOWN toggles between the 2
words. When FAILSAFE, the alarm relay will be energized in a non-
tripped state, and de-energized when tripped.
4.6.4 Alarm Latching
-----------------------
->AL-1 LATCHING
-----------------------
Pressing ENTER causes the word LATCHING or NON-LATCHING to
start flashing. Then pressing UP or DOWN toggles between the 2
words. When LATCHING, an alarm will remain tripped until defeated;
even if the O
2
concentration returns to a level that does not trip the
alarm. When NON-LATCHING, a tripped alarm will become un-tripped if
the O
2
concentration returns to a non-tripping level.
4.6.5 Alarm Setpoint
-----------------------
->AL-1 80.00 ppm
-----------------------
Pressing ENTER causes the setpoint concentration to start flashing.
Then pressing UP or DOWN adjusts the setpoint up or down
respectively. Setpoints may range from 0.00 ppm to 100.00 %.