SE-RDA User Instructions 100507-03 B
Copyright © 2021 The S.E.A. Group
14
•
When cleaning the SE-RDA unit, wipe down with a damp cloth. Do not use
solvents or abrasives.
Pressure tube and vent port
It is essential that the pressure tube remains free of obstructions, and that the vent port
filter is clean and unblocked. Blockages or resistances in either will result in incorrect
pressure measurement and flow rate calculations.
Moisture can sometimes enter the opening of the pressure tube inside the respirator due
to build-up of exhaled moisture or as a result of cleaning. After use and cleaning, inspect
the clear pressure tube for signs of moisture inside the tube.
If moisture is present:
1.
First disconnect the pressure tube from the SE-RDA unit.
2.
Using an aerosol air duster, blow dry air through the tube from the end furthest
from the contamination, until it is cleared.
3.
If the contamination cannot be cleared, the SR100/200 adapter must be replaced.
Important
NEVER use compressed air to clean MASK or VENT ports on the SE-RDA unit.
Never use compressed air to clean the vent filter or pressure tube while still
connected to the SE-RDA unit. Permanent damage to the internal pressure
sensor may result.
Packing and storage
After cleaning, repack the components into the carry case. Before packing, ensure that
all parts are dry.
When coiling up the pressure tube, take care not to cause sharp bends or kinks.
Remove the batteries from the unit prior to repacking if it may be unused for extended
periods, as battery leakage may cause permanent damage to the unit.
It is recommended to store the SE-RDA in its carry case in a cool, dry place, away from
direct sunlight and sources of vibration.
Calibration
The SE-RDA is supplied factory-calibrated.
To verify accurate operation of the SE-RDA, the user may perform a static pressure
measurement test, by applying a static pressure to the mask port and comparing the
measured pressure with a reference manometer. Take care not to apply more than 20
cm H
2
O to the mask port as damage to the pressure sensor may result. For further
information see section Real-time graph mode.
Measurement uncertainty
Pressure: ±0.15 mbar, 95% confidence