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hc-cargo D440A - Page 5

hc-cargo D440A
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Maintenance
Batteries:
Install Batteries: Remove screw located at rear end of unit and pull
down hinged battery door to open as shown.
Polarity Mark
4
Filter
Keyway alignment
Pull straight out (do not
twist) to remove sensor
Unscrew tip to
replace filter
Push straight on (do not
twist) to install sensor
IMPORTANT: The instrument’s software is designed to alert the user if
the sensor is dislodged or defective. If the sensor is not fully inserted
into the six-pin socket, or if it is defective, the instrument will not come
out of the “Warm Up” mode for proper operation when the power
button is turned on. Additionally, if the instrument becomes unstable
during its operation, it is an indication that the sensor may be defective.
Sensor:
Replace Filter: Unscrew sensor tip as shown to replace filter. Replace
filter whenever it becomes visibly dirty or every 2 to 3 months depending
on use.
Replace Sensor: Remove sensor by pulling out of socket. Install the new
sensor by aligning the Keyway notch in sensor cover with the raised
keyway on sensor socket holder (see figure below).
Note: Do not force sensor into socket. Misalignment can damage the
sensor pins.