Installation Operation Maintenance

ControlsFigure 20 - CO 2 /VOC adjustmentVR1: Integral adaptive timer is toprevent instability brought about bylarge fluctuations from the signalinput. Adjustment is 1 to 60sec/stage. The lower the integral time,the quicker the control response(may cause instability). The higherthe integral time, the slower thecontrol response (may causesluggish response).VR2: Input control start point from0 to 5 Volts. This allows the startpoint to be matched to the basevalue of the input signal. i.e. if thebase value of the input signal is2.5V then no increase in the outputresistance is obtained until the inputsignal rises above 2.5V.VR3: Minimum resistance outputvariable from 0 to 200Ohms. VR3 isused to set a minimum fresh airindependent of the CO 2 measure.Switch 2: This switch when ONlimits the output to 50% of the fullrange i.e. 100 Ohms.34RT-SVX16C-E4