GE Bently Nevada 3300/16 Operation Manual page 10

3300/16 Dual Vibration Monitor Operation Manual
GAP ALARM - Pressing the GAP and ALERT switches simultaneously displays the Gap
Alert setpoints. When the gap level is equal to or outside the over and under setpoint
window limits for 6 seconds, the ALERT LEDs come on and the appropriate Alert Alarm
relay contacts are activated.
FIRST OUT - Separate First Out circuits exist for the Alert and Danger alarms. A monitor
with First Out option selected flashes a channel alarm LED if that channel was the first
channel in the rack to go into alarm since the last rack power up or reset. Pressing the
RESET switch on the System Monitor acknowledge the First Out.
ALARMS RELAYS - Monitor alarms can operate in a latching or nonlatching mode. In the
nonlatching mode, the alarm resets automatically when the alarm no longer exists. In
the latching mode, you must reset the alarm condition manually by pressing the RESET
switch on the front panel of the System Monitor (or by closing external Reset contacts).
The alarm will not reset if the alarm condition still exists.
DANGER BYPASS - When you maintain machinery, you can set a Danger Bypass switch
on the monitor circuit board behind the front panel to inhibit the Danger relay drive. This
function causes the BYPASS LEDs to come on, but other front panel functions are not
affected. You can enable this switch by installing a jumper on the circuit board in the
monitor.
CHANNEL BYPASS - If a channel remains not OK, you can set the Channel Bypass switch
on the monitor circuit board to put the channel "out of service".
ZERO POSITION - A reference gap value that you can set when the Gap Full Scale Range
is in engineering units (mils or micrometers). You can then read gap on the meter scale
relative to this zero position on the center of the gap meter scale. Selecting a Gap Full
Scale Range in engineering units increases gap resolution on the display because only a
selected area within the transducer's OK limits is displayed.
BUFFERED OUTPUT - The coaxial cable connectors on the front panel of the monitor and
the terminals on the Signal Input Relay Module provide buffered signals from the
respective channel transducers. Use these connectors to attach external equipment to
the monitor.
TRIP MULTIPLY - The Trip Multiply function multiplies setpoints by 2X or 3X in response to
an external contact closure through terminals on the Power Input Module. The front
panel meter and recorder outputs could saturate in this mode.
RECORDER OUTPUTS - The recorder output is proportional to the measured vibration
signal over the monitor full-scale range. The output range is user selectable to be 0 to -
10Vdc, +1 to +5Vdc, or +4 to +20 mA.
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