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OX-AN R-134a Leak detection Monitor

V1.3

17 |

P a g e

[For Signal boards the USB PID is given by 0x40+Address]

[For Relay boards the USB PID is given by 0x30+Address]

Note: Boards must be addressed without gaps, i.e. only boards 0 and 2 are not allowed and the

addressing should be changed to 0 and 1.

7.2 Relay Board Fail Safe Feature

If a Relay board does not receive a specified USB based PC communication within a 10 minute period

the relay board will automatically activate all output relays. Please ensure that the outputs are

isolated if the R134aMonitor application is not running for any prolonged periods.

Содержание OX-AN R-134a

Страница 1: ...nd Ltd Priestley House St Luke s Road Kirkby Stephen Cumbria United Kingdom CA17 4HT Telephone 0800 7720894 www ox an com email sales ox an com Raymond Coupland Environmental Unit W1 Technology Court...

Страница 2: ...2 Fans Off 8 5 0 SYSTEM CONFIGURATION 8 5 1 CONFIGURING INPUTS SENSORS 9 5 1 1 Input Sensor Properties 10 5 2 CONFIGURING OUTPUTS RELAYS 10 5 2 1 Output Relay Properties 11 5 3 CONFIGURING INPUT OUTP...

Страница 3: ...ivate any alarm 2 0 Software The OX AN R 134a Monitor software comprises 1 PC based application R134AMonitor 2 PC XML configuration files 3 Signal Board PIC18F2550 Firmware 4 Relay Board PIC18F2550 Fi...

Страница 4: ...f the firmware requires replacement 3 0 Getting Started The following procedure should be used when starting the system from a complete power down 1 Ensure that power is applied to the UPS 2 Isolate t...

Страница 5: ...P a g e 3 1 Sensor Value Tab Fig 2 0 Sensor Values Tab During normal running the Monitoring Screen Fig 2 0 displays the location text alarm levels sensor value and isolate status for both R 134a and O...

Страница 6: ...r V1 3 4 P a g e 3 2 Outputs Tab The Outputs tab Fig 3 0 displays the current state of the relay outputs connected to the system During normal running the tab shows the location text and relay state f...

Страница 7: ...sual and textual indication of the connected Sensor and Relay boards It is important the number of connected boards is correctly specified in the system settings A fault condition occurs if any config...

Страница 8: ...t Resets all alarm levels Test outputs and Fan control outputs Test Activates all relays allocated to the Test Output Group Fans On Activates all relays allocated to the Fan Control Group Fans Off Res...

Страница 9: ...ate warning message is shown if any active sensor is isolated In isolated state the sensor does not cause any output activity i e no relays are activated For details of how to isolate a sensor see sec...

Страница 10: ...ensor boards and Relay Boards 2 Ensure that the Sensor and Relay boards are correctly addressed 3 Set the location text for the relay outputs 4 Allocate the required relays to the individual Output Gr...

Страница 11: ...for Relays 3 Input Output Output Group settings 4 System general system settings 5 1 Configuring Inputs Sensors The Input tab is shown in Fig 6 0 Fig 6 0 Configuration Input Tab To change a setting s...

Страница 12: ...the sensor value 6 4mA Value Offset for zero 7 20mA Value Offset for full scale 8 Sensor Value Step Size Delta for changing the screen display For each sensor Alarm Level 1 Alarm Level The level above...

Страница 13: ...ay list and then modify the parameters using the property sheet on the right hand side of the tab 5 2 1 Output Relay Properties The configurable output parameters are 1 Location Text The text displaye...

Страница 14: ...d side of the tab 5 3 1 Output Group Editing Setting the Outputx value an output group means that the output Relay will be set to ON when the Output Group is activated As an example in the setup shown...

Страница 15: ...y outputs allocated to this group will be energised when the group is activated 5 3 4 Fan Control Output Group The Fan Control Output Group is activated by the Fans On button Within the input output l...

Страница 16: ...ggering alarms 6 0 Sensor Level Logging The system continuously logs the value of all sensors to a CSV file located in C R134AMonLog The disk files are named as R134aMon_yyyymmddhhmmss csv where yyyym...

Страница 17: ...me interval is determined by the Alarm State File Update Period setting In this condition the system displays the Fast Log message on the upper part of the interface as shown in Fig 10 0 6 2 Start New...

Страница 18: ...e hardware components of the OX AN R 134a Leak Detection Monitor 7 1 Sensor and Relay Card Addressing Each Sensor Board and Relay Board has a small DIL switch which is used to set an address This addr...

Страница 19: ...s i e only boards 0 and 2 are not allowed and the addressing should be changed to 0 and 1 7 2 Relay Board Fail Safe Feature If a Relay board does not receive a specified USB based PC communication wit...

Страница 20: ...he individual inputs The zero offset is the 4mA value The full scale value is the 20mA value Providing the sensor has a linear response the system can be calibrated by setting the relevant 4mA and 20m...

Страница 21: ...OX AN R 134a Leak detection Monitor V1 3 19 P a g e...