Vaisala K-PATENTS PR-23 Series, Instruction Manual, Page: 196 / 246

186 PR-23 instruction manual
11.5.2 Sensor removal
1 Switch off the DTR to cut off power from the sensor.
Close wash valve.
1. Unscrew and remove sensor nameplate
2. Loosen the cable gland
3. Unscrew the wires
4. Remove the sensor cable and cable gland
Note: If another in-line sensor is connected to the
same DTR, disconnect the loose cable from the DTR and
turn on power again.
2 1. Lift up the latch of Inner casing to unlock it. Lift
Inner casing over the sensor head. The latch of Inner
casing should be slightly to the left.
3 1. Rotate Inner casing 60° clockwise to lock it onto the
flange.
2. Lock Inner casing latch.
4 1. Open the locking latch on Outer casing. Grab Outer
casing with one hand on the handle and the other hand
on the wheel. Fit Outer casing over Inner casing.
2. Turn the hand-wheel clockwise to get the thread of
Inner casing running through the hand-wheel.
5 1. Rotate Outer casing 60° clockwise to lock the
bayonet.
2. Lock Outer casing latch.