GE Bently Nevada 1900/27 Operation And Maintenance Manual page 19

Vibration monitor
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Example:
Suppose your 4 to 20 mA system has the following characteristics:
• The minimum loop supply voltage is 24 V.
• The receiver has a source supply resistance of 250 ohms.
• The cable impedance is 12 milliohms/ft.
• A device with a constant voltage drop of 1 V is inserted into the loop.
Then the maximum cable length is
Use the following tools to attach the cable to the 1900/27 monitor:
• Two-conductor shielded cable.
• A screwdriver.
• A wire stripper to remove insulation from the cable
Connect the 4 to 20 mA loop to the monitor by following these steps. Refer to
Figure 2-10.
1. Strip the outer jacket and the shield foil from the monitor end of the
cable.
2. Strip 6.4 to 9.5 mm (0.250 to 0.375 in) of insulation from both of the
insulated inner conductors.
3. Use a screwdriver to connect the inner conductors including the
shield, or drain, wire to the 4 to 20 mA terminal strip.
Section 2 - Installation
13

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