MB2 (2022 models onwards) Calibration procedure
Models Covered
MB2
MB2-HiFlow
MB2-RSH
MB2-RSH-HiFlow
Procedure
This procedure applies only to MB2 samplers fitted with A-00612 circuit board with keypad control calibration adjustment. For older sampler models with a screw adjustment, then follow the procedure applicable to those models.
To adjust the MB2 to HiFlow, keep increasing the blower voltage level until the higher flow is reached. The MB2 software will recognise the higher voltage and automatically change its sample timing parameters to suit.
By default, the flow rate is pre-set to approximately what is needed for a 100 lpm flow rate.
Insert battery pack or, if option fitted, the external power supply.
Fit Petri dish or contact plate as appropriate.
Fit required sampling head.
Clamp on qCR rig and switch on the anemometer.
FOR RECALIBRATION: Press and hold the MENU button and press the LOGO button to switch on. Keep holding the MENU button pressed until calibration mode is entered - about 5 seconds.
FOR FACTORY FRESH UNIT: Switch on with the LOGO button and calibration mode is automatically entered.
Press START to commence air flow calibration, or LOGO to quit calibration mode.
Press + to increase blower voltage / flow rate - increments in 0.01V steps.
Press - to decrease blower voltage / flow rate - decrements in 0.01V steps.
Press MENU and + to increase in 0.1V steps.
Press MENU and - to decrease in 0.1V steps.
When qCR reads predominantly the required calibration velocity, begin recording measurements on calibration certificate in accordance with WI422 Air Sampler Calibration Using Qualisair qCR Calibration Kit.
When finished record the blower voltage (Vf) on the spreadsheet just under the flow measurements.
Press TICK to store the setting in the sampler, or press LOGO to quit without saving.
