Germfree BZ Series, User Manual

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14
Installation and Operation
Manual
Series A3 & A4
require a manual reset by holding the left arrow and right arrow
simultaneously on the face of the control.
 Automatic (Auto) – For automatic reset
 Manual (Manual) – For manual reset
 Alarm Inhibit (AL ih) – This parameter allows the user to suspend the alarm
during power up until the process moves through the low alarm set point. If
alarm inhibit is off, and the control is in an alarm condition at power up it
will alarm and possibly require manual reset.
 On (On) – Alarm Inhibit is on
 Off (Off) – Alarm Inhibit is off
 Alarm Delay (AL D) – This variable sets the minimum amount of time that
the process must be above or below the alarm before the switch state alarms.
 value – Time in seconds
 Peak (Peak) – The peak is the highest value the control has reached since the
last time it was reset.
 value – Allow the user to manually reset the value.
 Valley (Valy) – The valley is the lowest value the control has reached since
the last time it was reset.
 value – Allows the user to manually reset the value.
 Mode (Mode) – The control is capable of measuring and displaying pressure,
velocity, or flow. For velocity and flow, a flow sensing device such as a
pitot tube, or orifice plate with a know flow coefficient is required. For
flow, it is also necessary to know the dimensions of the duct that the flow is
being measured in so the control can calculate the area.
 Pressure (Pres) – To display and control pressure
 Velocity (Vel) – To display and control velocity
 Flow (Flow) – To display and control flow
 Units (Units) – The engineering units selected will be displayed on the LCD
during programming and normal operation of the control. The unit of
measure selected will be used for displaying the pressure, velocity or flow
reading as well as all programming variables. If the units are changed after
programming has occurred, all values will automatically be changed to the
correct corresponding value of the new unit of measure. The unit conversion
equivalents are shown in the below table.
Pressure
 (inWc) – Inches of water column
 (mmWc) – Millimeters of water column
 (cmWc) – Centimeters of water column
 (Pa) – Pascals