Honeywell DT900 Series PIR and Microwave Adjustments - Step-by-Step
– 1 –
PIR and Microwave Adjustments for the DT-900 Series
Adjusting the PIR
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.
Set the desired sensitivity of the PIR by the swi
tched labeled “S3” located in the center
section towards the back of the unit.
Locate the Vertical adjustment towards the front
of the unit and adjust the screw until the
diamond corresponds to the correct protection dista
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 & DT907
– 2 –
Walk test the sensor making sure the GREEN led li
when walking across the desired coverage area. Fin
adjustment may be required. The fine adjustment wi
allow for small changes (lens moves 3 degrees to th
e right or
left). The locking screw must be loosened before c
and tightened after changes. Additional walk testi
required after every coarse or fine adjustment.
Adjusting the Microwave
Find the switch labeled “S4” along the front of t
he unit and set its range to the match the PIR
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
Allow 3-4 minutes for the unit to stabilize before