Honeywell DT900 Series PIR and Microwave Adjustments - Step-by-Step

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Tech Support


5/25/10
PIR and Microwave Adjustments for the DT-900 Series
Motion
Detectors


Adjusting the PIR
1)
Carefully turn the orange PIR Mirror selector mak
ing sure the arrow of the selector points to
the desired range. This is located on the left sid
e of the sensor.










2)
Set the desired sensitivity of the PIR by the swi
tched labeled “S3” located in the center
section towards the back of the unit.








3)
Locate the Vertical adjustment towards the front
of the unit and adjust the screw until the
diamond corresponds to the correct protection dista
nce/mounting height.



DT900 & DT901 – Adjust the screw until the diamond


corresponds to the mounting height

with respect to the protection distance

on the right side of the gauge.


DT906 & DT907 – Adjust the screw until the diamond



is within the thick black line of the

desired protection distance on the left

side of the gauge.
DT906/907 Shown

DT906 & DT907

DT90
0

&

D
T90
1

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Tech Support


5/25/10


4)
Walk test the sensor making sure the GREEN led li
ghts
when walking across the desired coverage area. Fin
e
adjustment may be required. The fine adjustment wi
ll only
allow for small changes (lens moves 3 degrees to th
e right or
left). The locking screw must be loosened before c
hanges
and tightened after changes. Additional walk testi
ng is
required after every coarse or fine adjustment.



Adjusting the Microwave

1)
Find the switch labeled “S4” along the front of t
he unit and set its range to the match the PIR
setting.












2)
Locate the microwave potentiometer on the right s
ide of the unit and
turn it counterclockwise to decrease the microwave
range to minimum.
Walk test the unit and gradually turn the potentiom
eter clockwise to
increase microwave sensitivity until the desired ra
nge is obtained. You
should see the yellow LED light when you are detect
ed by the microwave.
The red LED should come on when both the PIR and mi
crowave trip.
Allow 3-4 minutes for the unit to stabilize before
walk testing.