51304467-100 Honeywell

NOTE

If the phase difference between the pulses from SPEED channels changes substantially,

reverse rotation detection may not work. In this scenario, the probe positions may need to

be adjusted.

The direction of positive turbine rotation is recorded during normal turbine operation when the

turbine speed exceeds 500 RPM. The reverse rotation flag is set to ON when there is a phase

change observed consistently between the two speed channels for few rotations.

10.21.6 Measuring flow in the turbine flow meters

With R410, SP_SPEED channel can be configured to measure the flow in the turbine flow meters.

The flow PV is computed using the following formula.

where the Timebase can be configured as any one of the following:

l /Second, Timebase = 1

l /Minute, Timebase = 60

l /Hour, Timebase = 3600

l /Day, Timebase = 86400

10.21.7 Configuring the SP_SPEED channel to measure the flow

Perform the following steps on the Configuration tab of the SP_SPEED channel's configuration

form to measure the flow in the turbine flow meters.

1. In the Type Information section, configure the MEASUREMENTTYPE parameter as 'Flow_

Measurement.'

The parameters related to the flow measurement are enabled in the Configuration tab.

2. In the PV Configuration section, configure TIMEBASE parameter as any one of the following

based on your requirement.

l \Second

l \Minute

l \Hour

l \Day

3. In the Flow Information section, ensure that the ORDEROFKFACTOR parameter is configured

as '1st Order.'

4. In the Flow Information section, type the value of the KFACTOR as required for flow meter.

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