BROKEN BAG DETECTOR
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Manufacturer: Monitortech(USA)
Model: DUST ALARM SERIES
The DustAlarm® Broken Bag Detector provides reliable and economical detection of leaks and filter failures in many powder and bulk solids industries. The DustAlarm is successfully utilized in a wide variety of applications where detection of dust levels is critical either to safety, maintenance, equipment operation, plant efficiency and/or the environment. The DustAlarm measures the triboelectric effect to determine when particle emissions exceed acceptable levels.
The DustAlarm Broken Bag Detector incorporates visual indications and a relay output to maximize its user-friendliness and automation capabilities. A reference point is set by the sensitivity control adjustment, aided by the tri-color LED. The alarm point is set by an alarm level control adjustment. The relay output can be used to activate an alarm device or can be integrated into a control system to enhance the overall operation of the dust collector.
Features
SENSITIVITY ADJUSTMENT
The tri-color SIGNAL LED guides the user through the sensitivity adjustment procedure. This LED can be yellow, green or red. While the dust collector is running efficiently and clean, the user adjusts the sensitivity until the LED is green.
ALARM POINT ADJUSTMENT
The alarm point is adjusted by setting the Alarm LEVEL control (1 to 10 times the baseline signal level). The emission level exceeds the alarm point,is indicated by illuminating the SIG>LEVEL LED.
TIME DELAY
The time delay feature enhances operation and control minimizing the occurrence of false signals that might occur during normal operation and cleaning cycles of the dust collector. The time delay provides a 0 to 60 second or 0 to 10 minute adjustment.
RUGGED CONSTRUCTION
The rugged NEMA 4 housing is to be used in general purpose environments and incorporates a screw-on/off cover for easy access to the adjustments, a cover lock mechanism and convenient LEDs used during installation and setup.
UNIQUE PROBE DESIGN
The sensing probe is 316 stainless steel with a specially designed PFA extended insulator that helps protect the unit from false signaling due to product build up.
QUICK-DISCONNECT MOUNTING
The quick-disconnect mounting coupling provided with each unit is used to mount the DustAlarm to the exhaust duct or pipe and simplify the removal of the device if necessary to clean the probe.
Technical Data:
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ELECTRONICS:
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Power Requirements:
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Low Voltage AC:
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105 to 130 VAC, 50/60Hz
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High Voltage AC:
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210 to 260 VAC, 50/60Hz
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Low Voltage DC:
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10 to 32 VDC
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Process Temp:
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up to 160°F (70°C); up to 450°F (235°C) for remote probe electronics option
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Ambient Temp:
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-20° to 150°F (-30° to 65°C)
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Output:
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(2) SPDT isolated relay contact sets; 5 amps @ 250VAC max or 30VDC
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Sensitivity Range:
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0.0005 grains/dscf (1 mg.m³) typical detection at maximum sensitivity; 100 to 1 adjustable range
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Smoothing:
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Adjustable from 0.1 to 22 seconds
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Sensitivity Setpoint:
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Baseline level setting indicated by tri-color LED
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Alarm Threshold:
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Adjustable from 1 to 10 times baseline
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Alarm Time Delay:
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Adjustable range 0 to 60 seconds or 0 to 10 minutes; via range selector and single-turn control
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Fail-Safe:
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Alarm condition on power failure
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Electrical Connections:
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(2) 3/4" NPT conduit connection; (2) cable glands suitable of sealing cords with diameter of 0.25 in (6.4 mm) to 0.48 in (12.2 mm) are provided
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Indicators:
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Tri-Color LED indicating: "Low"= Yellow;
"OK" = Green; "High" = Red
SIG>LEVEL = Yellow
ALARM LED = Red
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Housing:
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NEMA 4, IP65; Designed for general purpose locations
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Cover Lock :
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1/16" Allen-Wrench
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PROBE:
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Architecture:
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Integrally or remote mounted to electronics housing
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Mounting:
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Quick-Disconnect fitting with ferrule, clamp and gasket
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Pressure:
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30 psi (2 bar) maximum
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Insulator Material:
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PFA, extended length
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Probe:
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3/8" diameter, 316 SS
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Probe Length:
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3 in (76 mm), 6 in (152 mm), 12 in (305 mm) standard; consult factory for custom lengths
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Listings/Approvals:
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CE Mark
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