User manual CF8-D/W-IN General The sensor CF8-D/W-IN is used to measure the carbon dioxide concentration inside incubators. All functions can be modified from a PC with the communication cable.
Functional description This part describes the function of the configuration of CF8-D/W-IN. Please note that the two outputs may completely or partly have other functions. These functions may be reprogrammed after the installation. To be sure that every unit is correctly programmed, in accordance to the actual application, a check by a PC and the standard UIP software (version 4.0 or higher) is necessary. OUT1 and OUT2 are used for the measuring signal of carbon dioxide concentration.
Functional test of CF8-D/W-IN The unit has two LED’s -one yellow and one red. These LED’s indicate the status of the controller. Yellow LED - ”Call for maintenance” is lit, if an error flag is set or the measurement is out of range. The yellow LED flashes in series during Automatic Zero Point Calibration. Red LED - ”Relay active” is lit for eight minutes when a zero point calibration has been executed. PLEASE NOTE! The sensor accuracy is defined at continuous operation.
Automatic Zero Point Calibration The CF8-D/W-IN sensors have a function for easy automatic zero point calibration. The calibration should be done after installation and at least once every year. The calibration can be done on site. It is only necessary to connect the zero gas without any further action required from the operator, but to check the verification signal offered from the system. 1. Unscrew one of the filters from the sensor housing and replace it with a hose nipple. 2.
800 Normal measurement Phase 2 Acknowledgement period Phase 1 Check calibration conditions 700 600 Zero gas Yellow LED flashes 500 ppm CO2 Automatic Zero Point Calibration is reached 400 300 200 Calibration is executed The yellow LED flashes four times The red LED is lit The relay is closed 100 0 0 50 100 150 200 Time seconds 250 300 350 Figure 2. An example of Automatic Zero Point Calibration The Automatic Zero Point Calibration should be executed after installation and at least once a year.
This product is in accordance with the EMC Directive 89/336/EEC and the Low Voltage Directive 73/23/EEC including amendments by the CE-marking Directive 93/68/EEC The product fulfils the following demands: EN50081-1, EN55011(B) EN50082-2, EN61000-4-2,-3,-4,-5, Level3 Dokument UMA 148 Rev 1 Page 6 (6)
