Sentry Printer
The Sentry printer option provides preformatted reports of critical information for analyzing gas exposure and evaluating system reliability. Report selection criteria are user definable via the keypad. These reports help you make better decisions during a gas leak and provide history to analyze all exposure events. They substantiate your due diligence in abiding with regulations and confirm the reliability of the system.
Sentry, with the optional printer, simplifies record keeping necessary to document your responsible management practices. There are five major reports provided; Status Report, Key Event Report, System Report, History Report and Calibration Report. With Sentry printer software, preformatted reports can be printed, via the RS-232 port on the Sentry connector panel. Output is either directly from one controller to a printer, or via the Sentry Master and Subordinate network system, from several controllers to one printer.
The Sentry Commander offers similar reports via its printer output.
Status Report shows a snapshot of the gas concentration and alarms. Reporting interval is user selectable from 1 hour to 7 days. The first line indicates the controller ID and date/time. The second line indicates the sensor number and alarm indication ("L" for low alarm and "H" for high alarm). The third line indicates the current concentration and the fourth line indicates the gas type.
System Report lists all the system parameters including the software configurations of the system, calibration, printer and each module (on/off condition, calibration status, relay latching configuration, alarm levels, module type, the controller channel to which it is connected, and calibration conditions and factors).
Key Event Report is generated whenever any module reading exceeds a preset minimum level. After the sensor is above the minimum level, any change greater than a preset change concentration will cause another Event Report to print. The Event Report prints all module numbers and their present reading. This concise record provides information for better decision-making before an alarm level is reached.
History Report lists the last time each significant event has occurred. This includes system power interruption, history reset, alarm and concentration information for each sensor, calibration time for each sensor and an error log. A History Report can be printed each time a Status Report is programmed to print by selecting "Print History" "Y" in the CHANGE PRINTER routine. These records are useful in establishing the presence of gas during the period and documenting the company’s due diligence in its gas monitoring efforts.
Calibration Report prints automatically upon completion of calibration. The report indicates which gas type was calibrated, the gas concentration and the planned frequency of calibration. For each module the report lists the percent change during calibration, the peak concentration and the zero and span sensor voltages. Module sensitivity is also checked. Sufficient sensitivity requires that the voltage difference obtained in air (1st voltage) and with span gas (2nd voltage) is sufficient to get adequate resolution.
Warm Start Report prints at any time the system is warm started due to a power failure to show the system software configuration, the result of an internal diagnostic sequence and the power down and power up dates and times.
Diagnostic Report lists the critical voltage conditions for each module and can be selected to print periodically (from 1 to 90 minutes).