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2.0 Alarm - General Information
It must be emphasized that an alarm notification by itself will not insure additive/product ratio compliance.
It is imperative the ProPAC-3 Permissive Output, as well as other I/O's, be integrated into the terminal
control system where product loading may be terminated in the event of an injector alarm. The various I/O
and programming features available in the ProPAC-3, when properly integrated, are the best means to
insure regulatory compliance regarding additive/product ratios.
ProPAC-3 Alarms may be classified as:
1.
Non-Programmable Alarms (cannot program Disabled))
2
. Programmable Alarms (can program either Enabled or Disabled)
2.1 Resetting Alarms
Alarms may be reset, via the following means
:
1.
ProPAC-3 External Pushbutton. (Note: Item 1 of the Alarm Section of the program menu, the
menu titled Pushbutton Clears Alarms, must be programmed Enabled)
2.
Cycling power to the ProPAC-3 (OFF to ON)
3.
Protocol Reset command, via the RS-485 serial communications
2.2 Resetting Alarms and Continue Current Load
Holding the pushbutton in for three seconds until the injector beeps can reset alarms that are caused by low
or no additive flow. The injector will attempt to restart the previous load maintaining all load totals while
making larger injections to get the load back into spec. This is a more sophisticated way of recovering from
a low additive alarm situation. This method will assure that even when the injector goes into alarm the
correct additive has been injected into the load.
3.0 Alarm Description
A general description for each alarm condition is provided herein.
3.1 Non-Programmable Alarms
There are two (2) Non-Programmable alarms. These alarms, by their nature, are always considered to be
critical alarms. Therefore, there is no ability to disable any of the non-programmable alarms.
3.11 Fail Safe Alarm
Problem:
Although it is highly unlikely, it is possible there could be a failure of the microprocessor
programming or other event that could cause the injector to flow additive any time the additive pump was
pressurized.
Solution:
The Fail Safe alarm serves as a back-up alarm in the event of a catastrophic failure of the
microprocessor or processor programming. This alarm circuitry is totally independent of the ProPAC-3
microprocessor and is incorporated into the design of the main circuit board. The alarm activates under the
following condition:
The alarm circuitry monitors the energized state of the ProPAC-3 solenoid control valve. If the
circuitry detects the solenoid has been energized continuously, for approximately 45 seconds, the circuitry
terminates power to the solenoid, thereby, terminating the flow of additive.
Note:
When the ProPAC-3 is in this alarmed state, further injection attempts are prohibited.
3.12 Excessive Temperature Alarm
Problem:
Although it is unlikely for the microprocessor's internal temperature to exceed 180
Deg.F, even in the hottest of climates, temperatures in excess of 180 Deg.F may cause severe damage to the
unit. Temperatures in excess of 180 Deg.F will invalidate the product Warranty.
Solution:
The ProPAC-3 circuitry includes temperature monitoring of the microprocessor. If the
ProPAC-3 internal temperature exceeds 180 Deg. F, the Excessive Temperature alarm will activate, thus,
indicating the maximum rated temperature has been exceeded.
Содержание ProPAC-3
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