Advanced Instruments Inc.
Allow the oxygen reading to stabilize for approximately 2 minutes at each sample point.
View History
This feature allows the user to view
Maximum PPM O2
Minimum PPM O2
Average PPM O2
Maximum ambient temperature
Number of days the sensor has been in service (at the time of installation and first calibration, the user must enter
YES to confirm "new sensor") and
Number of days since the last calibration was done.
System Options
This features allows the user to
1.
Set security; password protected operation
2.
Define ranges; choose a range between two ranges, for example, 200 PPM full scale instead of 1000 PPM
full scale.
3.
Display signal below 0.00; Negative signal, YES or NO.
4.
Displays MODBUS COMM menu
Security
PASSCODE LOCK- Prevents un-authorized access to the analyzer menu options. Selecting PASSCODE LOCK will put
the analyzer in Sample Mode and accessing the menus will require a valid passcode.
To enter pass code, from SYSTEN OPTIONS menu, select SECURITY, select PASSCODE LOCK and then enter four
digit PASS CODE, numeral numbers only and press ENTER. Then select AUTO LOCK option and enter the number of
minutes after which access to MENU options will be locked (access allowed only after entering the PASS CODE).
In the vent the PASS CODE is lost, enter the factory default PASS CODE 2855 to access the MENU and then renter
the new PASS CODE.
Choosing the option to display negative number will allow the user to see the display below 0.00 but the output will
not go below 3.80 mA.
Configure Alarms
The analyzer is equipped with two programmable alarm relays; ALARM 1 and ALARM 2. The two alarms set points
are user adjustable and can be set either as LOW/HIGH, LOW/LOW or HIGH/HIGH.
Alarm Pulsing
Sets the duration of Alarm relay pulses. Setting the duration to 0 seconds disables pulse mode (PULSING=OFF). If
the duration is greater than 0, the PULSE MODE is enabled and PULSE MODE will be dieplayed at the lower-right
corner of the sample screen.
Alarm Delay
Alarm delay option allows the user to ignore the alarm should a sudden short 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 run. 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 relays are rated at 1A @ 230V.
CAUTION; When using these relays, do not exceed the recommended rating.
28
