Emerson Process Management 3422 ユーザーズマニュアル
Reference, Installation, and Operations Manual
Upgrading a Mark II to a Mark III
3-9000-743 Rev S
June 2013
Gain
307
C.4.3
Gain
The Mark III signal gain values (
GainA1...GainD2) and limits (GainLowLmt and GainHighLmt)
are read in hardware gain units. Daniel MeterLink converts the hardware gain units to decibels
(dB) for display purposes using the conversion equation:
(dB) for display purposes using the conversion equation:
Equation C-10 Mark III Gain Conversion Equation
The Mark III gain units differ from those used by the Mark II. Therefore, the Daniel MeterLink
configuration conversion does not convert the Mark II
configuration conversion does not convert the Mark II
GainLowLmt
and
GainHighLmt
parameters.
The Mark III
GainLowLmt and GainHighLmt data points should be at their default values (the
widest allowable gain limits) and are unmodified by the Daniel MeterLink configuration
conversion. These data points can be modified using the Daniel MeterLink
conversion. These data points can be modified using the Daniel MeterLink
Edit/Compare
Configuration
screen.
C.4.4
Batch update period and stack size
The Mark III batch update occurs at a fixed timed interval whereas the Mark II batch update
occurs after each
occurs after each
BatchSize
firing sequences are completed.
For the Mark III, the batch update period is a function of the
SpecBatchUpdtPeriod and
StackSize data points (as described in
).
When using Daniel MeterLink to convert a Mark II configuration for use in a Mark III, the Mark II
BatchSize
parameter is not converted. The Mark III
SpecBatchUpdtPeriod should be at its
default value (standard update period of 1 sec) and is unmodified.
The Mark III does not support “stacking-by-chord.” The Mark II
StackSize
parameter is converted
to the Mark III
StackSize data point as follows:
StackSize
(Mark II)
(Mark II)
StackSize
(Mark III)
0, 1, 128 or 129
1 (none)
2 or 130
2
4 or 132
4
8 or 136
8
16, 32, 144, or 160
16
Gain
dB
20
Gain
Hardware
(
)
log
⋅
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