OPERATOR'S MANUAL BIOPROtect II JR Vent to ... - Baker Company
OPERATOR'S MANUAL BIOPROtect II JR Vent to ... - Baker Company
OPERATOR'S MANUAL BIOPROtect II JR Vent to ... - Baker Company
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Calibration procedure for Modus Airflow alarm(Digital Differential Pressure Moni<strong>to</strong>r).<br />
Note: This procedure MUST be followed every time the damper width has been changed.<br />
Initial Set Point Settings<br />
Balance the cabinet air flows <strong>to</strong> nominal operating set point per manufacturer instruction.( See<br />
instruction label on front of cabinet).<br />
Record voltage <strong>to</strong> mo<strong>to</strong>r/blower (M1, M2 on speed control) and measure and record damper/ slot<br />
width<br />
Make certain that the Modus displays 0.000 when zero pressure is applied(This can be easily<br />
accomplished by removing the Tygon tubing from the hose barb fitting). Use the “zero” function if<br />
necessary.<br />
Re-connect the tygon tubing and make sure that the value displayed is negative(-) when the cabinet is<br />
running.<br />
Low Flow Alarm Setting<br />
Place a DIM airflow hood on the front of the cabinet or use the 3 inch method for measuring inflow.<br />
Adjust cabinet <strong>to</strong> a 20% reduction in airflow by decreasing the voltage <strong>to</strong> mo<strong>to</strong>r. DO NOT adjust the<br />
damper<br />
Record the exhaust/ damper pressure on Modus (indication of exhaust plenum pressure at<br />
20% reduction) and voltage <strong>to</strong> mo<strong>to</strong>r/ blower (across M1, M2 on speed control)<br />
Set the Modus High Alarm set point <strong>to</strong> the 20% reduction in pressure recorded in step 14 (per Modus<br />
programming instructions below)<br />
Set the Modus dead band <strong>to</strong> .002 (per Modus programming instructions below).<br />
Return cabinet <strong>to</strong> Nominal Set Point voltage, recorded in step 2<br />
Check the Calibration<br />
Set Point Check<br />
While measuring the intake airflow with a DIM, reduce the airflow by decreasing the voltage <strong>to</strong><br />
mo<strong>to</strong>r/ blower until a 20% reduction in flow is measured. Check that the low set point alarms at this<br />
value. If not, reset Modus low alarm set point <strong>to</strong> alarm as desired, per instructions. Return cabinet<br />
<strong>to</strong> Set Point Voltage.<br />
http://solid/prereleased/prereleased/STAN. PRODUCT/313/DOCS/313D000.doc<br />
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