MPU Series B
Ultrasonic Gas Flow Meter
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PRD-0000022543 Rev. 00D Page 11 of 28
MNKS008 0.0 (4/08)
Object
number
ModBus
Address
Description Unit
37 74 Percentage Of Bursts Used Transducer 1B %
38 76 Gain Transducer 1A -
39 78 Gain Transducer 2A -
40 80 Gain Transducer 3A -
41 82 Gain Transducer 4A -
42 84 Gain Transducer 5A -
43 86 Gain Transducer 6A -
44 88 Gain Transducer 6B -
45 90 Gain Transducer 5B -
46 92 Gain Transducer 4B -
47 94 Gain Transducer 3B -
48 96 Gain Transducer 2B -
49 98 Gain Transducer 1B -
*1
This is a counter that is incremented by one on the completion of every
measurement cycle.
*2
This is the MPU Series B alarm status word. A non-zero value here indicates
that one or more alarms have been raised on the MPU Series B. See chapter 4.1
for details.
*3
This is the elapsed time in seconds since the MPU Series B was powered-up
*4
This is the volume measured during the most recent measurement cycle.
*5
This is the time elapsed during the most recent measurement cycle
3.3. High Resolution Accumulators
In some cases the normal 32-bit floating point presentation of the
accumulated flow may not give enough resolution. The following
objects offer a high resolution view of the accumulator registers.
Object
number
ModBus
Address
Description Unit
230 460 Accumulated Volume Forward m3 m
3
231 462 Accumulated Volume Forward m3 * 1e-9 m
3
232 464 Accumulated Volume Reverse m3 m
3
233 466 Accumulated Volume Reverse m3 * 1e-9 m
3
234 468 Accumulated error volume forward m3 m
3
235 470 Accumulated error volume forward m3 * 1e-9 m
3
236 472 Accumulated error volume reverse m3 m
3
237 474 Accumulated error volume reverse m3 * 1e-9 m
3
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