PRINCIPLE OF OPERATION
The ACES system incorporates a Perma Pure Nafion
®
membrane dryer,
disposable 0.1 micron pre-filter and sample pump to supply a clean sample to an
electrochemical sensor. The dryer is sized to supply a 20-80% RH sample from
ambient air at a flowrate up to 2 L/min.
After the ACES provides clean sample to the analyzer, it flows back to the
conditioning system where it is expanded by a vacuum pump and used as purge
air for the dryer (refer to flow schematic below).
INSTALLATION
Mount system close as possible to probe and analyzer to reduce response
time and flow restriction. Enclosure is NEMA 4X rated. Since unit is not
heated, dewpoint of sample entering system can be no higher than the
ambient temperature.
1. Turn power on. Pump will start and sample gas will begin to flow.
2. Adjust valve on top of flowmeter to set desired sample flow rate. Optimal
operating range is 0.5 to 1.5 liters per minute. Typically, a lower flow rate of
sample gas will be dried to a lower dew point than a high sample gas flow
rate. Refer to MD dryer performance chart.
OPERATION
Filter Replacement:
To determine if filter needs to be replaced, monitor pressure drop and flow
output of pump. If output begins to drop, it indicates clogged filter element.
1. Take notice to orientation of filter for replacement. Flow direction is top to
bottom.
2. Pull the lock ring on black elbow fitting away from filter to release internal
gripper. A small adjustable cresent wrench is helpful. Adjust it around the
filter tube stub and slide it down to press the lock ring and then pull the
filter out.
4. Replace with new filter (part number: AG-DIF-K70).
Pump:
The pump is warranteed against failure for 10,000 hours of continuous
operation from Hargraves (model BTC™). If pump fails, it will be repaired or
replaced at manufacturers discretion free of charge. The pump is not
serviceable after warranty period and must be replaced.
MAINTENANCE
SPECIFICATIONS
1. Mount system to wall using the supplied mounting feet. the flow meter must be
in the vertical orientation for proper operation.
2. Connect the fitting labeled "Wet Sample Inlet" to the tube from sample point.
3. Connect the fitting labeled "Dry Sample Outlet" to the tube from the analyzer
inlet.
4. Connect the fitting labeled "Dry Sample Return" to the tube from the analyzer
exhaust.
5. The fitting labeled "Sample Exhaust" can be connected to a vent line if the
sample gas is hazardous,corrosive,toxic, etc.This is not required for proper opera-
tion.
Description Specification
Dimensions 12"W x 7"H x 6"D
Electrical Requirement 110VAC/2A or 220 VAC/1A
Sample Flow 0.1 - 2.0 L/min
Disposable Filter 95% of 0.1 micron
Inlet Humidity Range 0-99%RH
Outlet Humidity 0-80%RH
1/4" O.D. tube,
polypropylene compression fitting
Filter Model AG-DIF-K70
Dryer Model MD-110-12F-4
Piping Connection
Sample Flowmeter
Sample Prefilter
Power Switch
Fuse
Power
Connection
Fiberglass
Enclosure
Sample Gas Connections
SAMPLE EXHAUST
F1
SAMPLE INLET
PARTICULATE
FILTER
DRY SAMPLE RETURN
FROM SENSOR
PUMP
DRY SAMPLE OUTLET TO
SENSOR
NAFION MEMBRANE DRYER
FLOW METER
WITH VALVE
(2 Seiten)
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