H25-IR PRO External Filter Retrofit
P/N: 3015-9004 Rev 0
5
Step
Description
7
Disconnect the AC power
entry module wires, noting
the wire color and position.
8
Remove the two lower chassis
screws.
9
Carefully pull the rear plate
away from the back of the
chassis.
10
Locate the exhaust tube port
inside the instrument, where
it exits. Pull the tubing off the
barbed fitting. The rear plate
will now be free from the
instrument.
2
.
2
.
Part Transfer to New Plate
Step
Description
1
Using the tools described earlier, remove and reinstall the speaker, RS-232, exhaust port barbed fitting, and
audio PCB onto the new rear plate. Connect the speaker as required.
2
The AC power entry module is removed by pressing the springs on each side inward until they are flat. Do this
while pressing down on the module to aid release. The terminal blocks removed earlier may be used as a
support for the plate while the power entry module is removed. As soon as one side is released the other side
will release easily.
3
Insert the power entry module in the new rear plate, noting that the power switch is to the right, and the
ground pin is up.
2
.3.
Installation of New Plate
Step
Description
1
Installation is generally the reverse of the removal steps.
2
It is recommended that the exhaust tube be connected first.
3
Align the new rear plate to the instrument PCB terminal strip. Insert the terminal blocks to aid holding the plate
in place.
NOTE: Ensure the new filter tubing is not pinched, kinked, or trapped between any components.
4
Reconnect the audio PCB, RS232, and power entry module wires.
2
.4.
Tubing Changes
Step
Description
1
Locate the 25 mm diameter filter and sample inlet tubing. The tubing is 1/8” (3 mm) silicone.
2
Disconnect the filter from the larger tubing nearest the main PCB.
