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Afa guide Installation Calibration Guide Air ow Monitor AFA MK Startup The AFA must be ?eld-calibrated once the room air supply and exhaust is balanced When the unit is powered up the following sequence of events occurs T he alarm performs a self-test of

Installation Calibration Guide Air ow Monitor AFA MK Startup The AFA must be ?eld-calibrated once the room air supply and exhaust is balanced When the unit is powered up the following sequence of events occurs T he alarm performs a self-test of its functions LEDs and audible alarm approximately seconds A t the end of the delay the unit will do one of two things a If the monitor has been calibrated the unit enters normal operating mode displays air ow velocity LED ? s and audible alarm enabled b If the unit has not been calibrated the monitor will display ?? Requires set up press Enter to continue ? Calibration Press Enter from the ??Requires set up ? screen or if the monitor is in the Run screen Press and Hold the Enter button for seconds until the Main Menu is displayed Using the - buttons select SET UP then select CALIBRATION then enter the password factory default password is - - - press Enter to continue Open the sash to the normal operating height and measure the face velocity using a calibrated instrument Using the -buttons enter the measured face velocity then press Enter the monitor will then sample the air ow for seconds If the air ow sample is unstable the monitor will display ??Deviations too High ? follow the instructions to repeat the sample or quit the calibration If the sample is accepted lower the sash by half and measure the face velocity using a calibrated instrument Using the - buttons enter the measured face velocity and press Enter the monitor will then sample the air ow for seconds If the calibration is successful the monitor will return the Main Menu select RUN to go to normal operating mode If the air ow sample is unstable the monitor will display ??Deviations too High ? follow the instructions to repeat the sample or quit the calibration continued over Temperature Electronics Ltd Unit Wren Nest Road Glossop SK HB UK T F E sales tel-uk com w www tel-uk com CInstallation Calibration Guide T he monitor will display ??Increase higher air ow sample ? if the second sample value is too close to the ?rst value entered close the sash a little and repeat the higher sample The minimum di ?erence between the samples that the monitor will accept is m sec fpm T he monitor will display ??Sensor di ? too low ? if the monitor doesn ? t detect any di ?erence in the sensor output between the air ow samples check that the sensor hose is connected and repeat the calibration Calibration Tips Ensure that the sensor hose is connected correctly at the side wall and rear of the sensor Ensure that the extract fan is running and the Fume Cupboard is balanced before calibrating the monitor Take extra time at least to seconds to wait for the air ow to settle before capturing the air ow samples This will minimize the chance of a