Analytical Industries GPR-1500 A Series Trace PPM Oxygen Analyzer - Manual (Page 32)

Advanced Instruments, Inc
32
100.0
OUTPUT SPAN OFFSET
PRESS UP OR DOWN
TO CHANGE VALUE
ENTER TO SAVE
MENU TO RETURN
The default setting of 100 illustrates no adjustment to the analog output signal. Compute the adjustment
value as described in Appendix B or consult the factory. The true adjustment value must be determined
empirically by trial and error. Adjust the initial value to above 100 to increase the 20 mA analog signal value
or decrease it below 100 to decrease the 20 mA analog signal.
6. Press the ENTER key to advance the underline cursor right or press the MENU key to advance the
underline cursor left to reach to the desired digit of the OUTPUT SPAN OFFSET value.
7. Press the ARROW keys to enter the OUTPUT SPAN OFFSET value.
8. Repeat above steps until the complete OUTPUT SPAN OFFSET value has been entered.
9. Save the adjustment value by pressing the ENTER key or abort by pressing the MENU key.
The system returns to the SAMPLING mode.
Setting Alarms
The analyzer is equipped with two programmable alarm relays. The two alarms set points are user
adjustable and can be set either as LOW/HIGH, LOW/LOW or HIGH/HIGH.
Alarm Delay
A user programmable alarm delay function is available. This feature allows the user to ignore the alarm
should a sudden short duration spike in the oxygen reading occurs.
Alarm Bypass
The alarms bypass feature allows the user to bypass the alarm during trouble shooting/repair or test runs.
However, once the alarm bypass is selected, alarm will remain disabled even if the oxygen reading is
over/under the alarm set point. The alarm will re-arm itself only after the fault condition has been reverted.
The alarms are automatically disabled during SPAN/ZERO calibration.
The alarm relays are rated at 5A @ 250V.
CAUTION; When using these relays, do not exceed the recommended rating.
Power Failure Alarm
A relay contact that is normally energized (normally open) during operation, is closed if the power to the
analyzer is turned OFF.
The relay is rated at 5A @ 250V.
CAUTION: When using this relay, do not exceed the recommended rating.