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The CMCP-TKAT Cable & Bias
Checker is a battery powered, hand-held unit designed to enable
installation engineers to verify plant cabling in vibration monitoring
systems. The unit provides constant current accelerometer power via a
BNC connector and indicates correct accelerometer operation or cabling
short /open circuits using a tri-color LED. In addition, the
accelerometer bias voltage is indicated on an LCD display. The battery
compartment, containing a single 9V battery, is accessible on removing
the rubber protective cover.
Features:
- Verifies Sensor Bias Voltage
- Verifies Cable Wiring
- LED Voltage Display
- OK, Short or Open LED Indicators
- 9V Battery Powered
- BNC Cable For Direct Connection
- Test Leads for Junction Boxes
- Includes Carry Case and Spare Battery
Technical Performance
| Input: |
| Constant Current Accelerometer or Velocity Sensor | | Display: |
| Indicates the Sensors DC Bias Voltage | | LED: |
| Green: OK |
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| Amber: High Bias Voltage / Open Cable Connection |
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| Red: Low Bias Voltage / Shorted Cable | | Connection: |
| BNC Socket | | Leads: |
| 2’ BNC to BNC Cable and Clip On Leads |
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| | Electrical |
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| | Power: |
| 9VDC Batter | | Battery Life: |
| 3 Hours (1xPP3) | | Low Battery Indicator: |
| Low Battery Indicator on Display | | EMC: |
| EN61326-1:2013 |
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| | Mechanical |
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| | Case Material: |
| Plastic with Rubber Molding | | Dimensions: |
| 3”x5”x12 with Cable Connected | | Weight: |
| 9.5 Oz. |
Operation
The CMCP-TKAT
can be connected to multi-channel switch boxes via a BNC/ BNC coaxial
lead, or to junction box terminals by use of the BNC lead adapter and
the test probes provided. The center BNC contact should be connected to
the accelerometer power/signal wire and the BNC outer to the
accelerometer 0V. On switching on via the toggle switch, the LCD meter
will indicate accelerometer bias voltage. The LED will be green if this
bias voltage is between 5V and 15V. Bias voltages outside these limits
indicate a faulty accelerometer. The LED will be amber for bias voltages
less than 5V and red for bias voltages greater than 15V. Cable
short-circuits are indicated by an amber LED and 0V on the LCD meter.
Open circuits are indicated by a red LED and a bias voltage greater than
20V. The battery current is 35mA in normal operation which will allow
many hours of continuous operation, however to preserve battery life,
the unit should be switched off when not in use. A low battery condition
is indicated on the LCD display when the battery voltage falls below
7.5V. The LCD display can be calibrated, if required, via a
potentiometer located on the rear of the display module. This is
accessible on removal of the four case fixing screws.
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