BCM Series of Boom Current Monitors
Bare-Hand Live-Line Work Safety
Rugged, Dependable Design
Automatic Safety Check for grounded test cables
The BCM-44 and BCM-44B are state of the art current monitors designed for continuous operation during bare-hand work. The BCM has an adjustable set point (5 presets also available on BCM-44B) between 1 and 400 microamperes AC or DC. A 90-dB horn sounds an audible warning if this current set point is ever exceeded during use.
The BCM-44 and BCM-44B are extremely rugged and dependable current monitors. Designed for operation a variety of weather conditions, the BCM provides the security needed for bare-hand live-line work.
Additional Features of the BCM 44B:
1. Metering of test circuit for boom metering bands
2. Metering of test circuit for hoses
3. Metering of test circuit for leveling rods or fiber optics
4. Total test including the sum of all three circuits
5. Band mis-wiring detection during power-up test.
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BCM 44
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BCM 44-B
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Display Type
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128 by 64 pixel wide temperature range LCD display. A microprocessor-controlled heater allows operation in extreme low temperatures.
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Ranges
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Two Ranges:
Low Range: 0-99 microamps A.C. or D.C. with .1 µA resolution. High Range: 0-500 microamps A.C. or D.C. with 1 µA resolution. |
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Voltage Drop
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Less than 1 volt full scale
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Measurement
System |
True RMS AC or DC within 1% of full scale
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Preset Alarm Setpoint(s)
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Up to 6. Preset values are normally factory set to 27, 40, 66, 93, 133, and 289 microamps. Other preset values are available by request. The presets can be changed in the field as desired.
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Adjustable Alarm Setpoint(s)
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Adjustable threshold can be set from 1 ?A to full scale by a front panel mounted 10-turn control.
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Set point
Accuracy |
Absolute
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Shorted metering
circuit monitor |
Continuous
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Metering circuit
continuity monitor |
Continuous
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Audible Alarm
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Internal 106DB multi-tone horn sounds when current exceeds setpoint, or when measuring lead is accidentally grounded.
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External Alerting Device
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A contact is provided to activate an external audible or visible alerting device. The output from this contact can provide either ground or switched input voltage.
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Power
Requirements |
12 or 24 volts D.C. negative ground. The monitor draws .04 amps steady state and .75 amps with the horn sounding. The display heater can draw up to .75 amps additional in extremely cold weather. 24 volt D.C. negative ground current draw is about half of the 12 volt current draw values.
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Enclosure
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Precision die-cast aluminum case
4.72” (12cm) x 8.66” (22cm) x 3.14” (8cm) with external mounting brackets |
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Weight
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5 Lbs. (2.3kg)
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Environmental
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-20˚ to +140˚F (-30˚ to +60˚C) Sealed to IP67 equivalent
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Input for test
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UHF coaxial connector
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7 pin Amphenol receptacle
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Input for
Power |
3 pin Amphenol receptacle
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3 pin Amphenol receptacle
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Test Cable
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25’ (7.6m) shielded coaxial cable
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4’ (1.2m) shielded six conductor cable
provided |
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Power Cable
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4’ (1.2m) three conductor cable provided
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