Teledyne 7500ZA - Infrared Gas Analyzer - Manual (Page 60)

Settings and Calibration Model 7500ZA
Teledyne Analytical Instruments 44
6.3 Alarm setting
6.3.1 Setting Alarm Parameters
The High/Low limit concentration alarms
are user adjustable. Five different alarm contact
outputs can be used. The setting range is 0-
100% full scale for each range.
To change the alarm setting, set the alarm
ON/OFF setting to OFF, and then change the
value.
1. Enter the “Alarm Setting” screen from
the user mode. The screen shown on the
right will display. Use the UP or DOWN
keys to move the cursor to the desired
Alarm No. or hysteresis. Then press
ENT.
2. After selecting the alarm the screen
shown at the right will display. Use the
UP or DOWN keys until the cursor is
aligned with the desired item and press
ENT.
Note: Set the values so that H-limit value >
L-limit value and that (H-limit value -
L-limit value) > hysteresis.
In the case where reverse range O
2
measurements are used set the
values so that L-limit value > H-limit
value.
When “0” is set, the alarm is inactive.
3. After setting the parameters, press ENT
to save the settings.
To close the Alarm Settings screen or to
abort the entry midway, press the ESC key. The
previous screen will return.