Replace the 4R+ Sensors

1.Turn the instrument off.

2.Remove the battery:

a) Turn the instrument face down and unscrew on the battery pack.

b) Remove the battery pack and the four screws in the battery compartment

3.Remove the sensor:

a) Remove the two screws at the top of the instrument and pull the back shell apart from the front shell.

b) Disconnect the 4R+ cable from the sensor.

c) Push at the PRESS marking in the manifold toward the top of the instrument.

d) Use the tabs on the sensor to pull it out of the manifold.

4.Install the new sensor:

a) Retrieve the new sensor and insert it into the manifold aligning the sensor guides to the instrument