Notes on Alarms and Alarm Acknowledge

The AGM300 can be operated in two different alarm acknowledge modes, Auto and Manual (set via the

alarm_ack_mode variable in the system data register). For purposes of this discussion, the term “Alarm” refers to an AGM300 state where the alarm light is on and the appropriate alarm relay is activated. The term “Alarm condition” refers to the external condition (i.e., refrigerant leak) that initially causes the AGM300 to go into an alarm. If an alarm occurs it can be handled in one of 3 ways.

1.Non-Latching Mode. This mode is enabled by setting the AUTO_ACK_MODE parameter in the system register to “1”. In this mode, if an alarm condition occurs an AGM300 alarm will be created. If the alarm condition is subsequently removed, the AGM300 alarm will automatically be cleared by the AGM300 when the zone in alarm is sampled “clear”. Note, in this mode of operation, it is possible for an alarm to occur and be cleared without user or MODBUS master intervention. If this is the case, the only evidence of the alarm would be contained in the AGM300 alarm log.

2.Latching Mode with Silence. This mode is enabled by setting the AUTO_ACK_MODE in the system register to “0”. In this mode, if an alarm condition occurs, an AGM300 alarm will be created. In order for the alarm to be removed the MODBUS master will write a “0” to the ALARM parameter in the ZONE register. This will cause the alarm to be “silenced” in the AGM300 (i.e., the alarm relays will return to their normal state and the ALARM lamp will be extinguished). The next time the zone with the alarm condition is sampled, if the alarm condition still exists, the alarm will be reactivated and the alarm parameter will be reset to “1” in the AGM300. Otherwise, if the alarm condition has cleared, no further action is required and normal operation will resume.

3.Latching Mode without Silence. This mode is enabled by setting the AUTO_ACK_MODE in the system register to “0”. In this mode, if an alarm condition occurs, an AGM300 alarm will be created. The AGM300 MODBUS master will then write a “1” to the ALARM ACK parameter in the zone register. The alarm will continue to persists (i.e., Relays in alarm state and Alarm light on) until the offending zone is sampled and no alarm condition is detected. At that point, the ALARM ACK parameter is automatically cleared by the AGM300, as is the ALARM parameter. NOTE: If the ALARM ACK parameter is set to “1” and the ALARM CONDITION is upgraded (from leak to spill, or spill to evacuate) the ALARM ACK parameter will automatically be cleared to “0” by the AGM300.

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Instruction 3015-4275

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Bacharach ADM800, AGM300 manual Instruction

AGM300, ADM800 specifications

The Bacharach ADM 800 and AGM 300 are advanced analyzers designed for efficient monitoring and detection of gases in various applications. Known for their reliability and accuracy, these instruments cater to commercial and industrial sectors, ensuring safety and compliance with environmental regulations.

The Bacharach ADM 800 is a portable gas detection device renowned for its ability to detect multiple refrigerants. With a user-friendly interface, it features a high-resolution display that provides real-time data on refrigerant concentrations, allowing technicians to quickly identify leaks during maintenance operations. One of its standout technologies is a highly sensitive thermal conductivity sensor, which enables the ADM 800 to differentiate between various hydrocarbon refrigerants with precision.

Equipped with data logging capabilities, the ADM 800 can store and retrieve measurement data, making it an invaluable tool for tracking refrigerant trends over time. The device supports USB connectivity for easy transfer of data to computers, facilitating detailed reporting and analysis. Its robust design incorporates a protective casing that ensures durability in challenging work environments, making it ideal for both field use and stationary applications.

On the other hand, the Bacharach AGM 300 is specifically crafted for continuous gas monitoring in HVAC systems. This stationary device excels in measuring concentrations of gases such as CO, CO2, and various refrigerants, ensuring optimal performance and compliance. The AGM 300 uses advanced electrochemical sensors for precise gas measurements, providing real-time feedback and alerting users to any hazardous conditions.

One of the notable features of the AGM 300 is its ability to integrate seamlessly with building management systems, enabling centralized control and monitoring of gas levels across multiple locations. This connectivity enhances the safety of industrial and commercial spaces by allowing for automated responses to detected gas levels, which can significantly mitigate risks associated with gas leaks.

Both models emphasize user-centric design, with intuitive interfaces and clear displays, making them accessible even to those with minimal training. Additionally, their low maintenance requirements and long sensor life contribute to reduced operational costs.

In conclusion, the Bacharach ADM 800 and AGM 300 are exemplary solutions for gas detection and monitoring. Their advanced technologies, robust features, and user-friendly designs make them indispensable for ensuring safety and regulatory compliance in various environments.