Closed Door Sensor Calibration Routine; Activating The Routine - NuAire NU-5510 Operation And Maintenance Manual

CLOSED DOOR SENSOR CALIBRATION ROUTINE

(Default "OFF" see section 8.8.1.2 item 4):

Activating the routine


Press logo key until tSt flashes in display then press ▲ to select the OPt menu.

Press "SEL" until C.SC appears in the display.

Press the ▲to turn this option on and shut off the open door routine.

Press the logo key to return to run.
Note: Turning off this routine will reactivate the "open door" calibration routine.
Zero Calibration

Make sure unit is in Run mode, the green LED above the mode key should be on and not
blinking.

Press the "SEL" key to indicate the LED next to the CO

Press the ▼ until "ZEr/value" alternate in the display: Air is being pumped through the
sensor to confirm the sensor zero value. After 60 seconds the display is automatically zeroed
and the span portion of the routine is started.
Note: If the value in the display is greater than 0.2 prior to the display zeroing, the zero portion
of the routine should be confirmed. Complete the current calibration by running the
remaining steps listed below. Then run the zero span routine again checking to make sure
that the display reaches zero.
The CO
2
Span Calibration
"DLY" alternating w/value: Shows for 90 seconds to indicate the delay to give CO
"SPn" alternating w/value: Indicates the span value shown in the display is ready for
Press mode key to switch to Set up then back to Run to lock in value and go back to normal
running mode.
Note: When the span measurement is greater than the setpoint, open the door briefly to remove the
excess CO
Allow unit to run and stabilize for a minimum of 2 hours then, check calibration with an
independent instrument. Compare the display CO
these two readings have a difference greater than 0.3%, repeat above procedure. If these two
readings have a difference of less than 0.3%, perform the CO
Section 9.4.1.
OM0135
display will show the following in order:
from the chamber time to reenter the detector head and
get an accurate reading.
verification. Measure chamber CO
front panel with an independent instrument. Change
display value to match this measurement using either
"▲▼".
.
2
display.
2
percent to your independent measurement. If
2
control calibration procedure in
2
38
2
at sample port on the
2