3500/42 Operation and Maintenance
Configuration Information
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Nonlatching
When an alarm is active, it will go inactive as soon as the proportional value
drops below the configured setpoint level.
Alert should be the first level alarm that occurs when the transducer signal
level exceeds the selected value. Danger should be the second level alarm
that occurs when the transducer signal level exceeds the selected value.
The Alert and Danger values are set on the Setpoint screen.
Barriers
Select the MTL 796(-) Zener External option, or Galvanic Isolators if external
safety barriers are connected between the monitor and the transducer. If using
an Internal Barrier I/O Module, select the internal option. These devices are
used to restrict the amount of energy that can flow into a hazardous area.
OK Mode
Latching
If a channel is configured for Latching OK, once the channel has gone not
OK the status stays not OK until a reset is issued. Reset a latched not OK by
using one of the following methods:
- the reset switch on the front of the Rack Interface Module
- the contact on the Rack Interface I/O Module
- the Reset button in the Operator Display Software
- the reset command through the Communication Gateway Module
- the reset command through the Display Interface Module
- the reset command in the Rack Configuration Software
Nonlatching
If a channel is configured for Nonlatching OK, the OK status of that channel
will track the defined OK status of the transducer.
Timed OK Channel Defeat
An option that prevents a channel from returning to an OK status until that
channel's transducer has remained in an OK state for the specified period of
time. If the option is enabled, the time is set to 60 seconds. The option protects
against false trips caused by intermittent transducers.
3.1.6
Acceleration Channel Options
This section discusses the Configuration Considerations and the Rack
Configuration Software screens associated with the Acceleration Channel.
3.1.6.1
Acceleration Channel Configuration Considerations
Consider the following items before configuring an Acceleration Channel:
- The "No Keyphasor" option is automatically selected for this channel type. No
Keyphasors are required.
- The Acceleration Direct full-scale range is dependent upon the transducer type.
- Monitors must be configured in channel pairs (for example, Channels 1 and 2
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