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Spirax Sarco ILVA20 User Manual

Spirax Sarco ILVA20
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IM-P337- 6 9 EMM Issue 2
50
7.5.3.4 DELAY
Response Time and Delay Time:
The response time of the MVT10 is between 0 and 0.25 seconds. This is the time the MVT10 can take to
reply to a request from the master. This takes into account time the master sends a request and when the
MTV10 is ready to return a reply.
MASTER
0.25 seconds
REQUEST
RESPONSE
RESPONSE
EXAMPLE 3
0.2 seconds response
Max
EXAMPLE 2
Instant
response
EXAMPLE 1
SLAVE - MVT10
REPLY
REPLY
REPLY
MASTER
0.25 seconds
0.25 seconds
0.25 seconds
REQUEST
RESPONSE
RESPONSE
EXAMPLE 5
Max
0.2 seconds response
+ 0.5 second delay
EXAMPLE 4
Instant
response
EXAMPLE 3
0.25 second response
+ 0.5 second delay
SLAVE - MVT10
DELAY = 0.5 seconds
DELAY = 0.5 seconds
DELAY = 0.5 seconds
REPLY
REPLY
REPLY
Fig. 28 Response time with no delay

guarantee a minimum response time. The delay time can be set between 0 and 1 second, in 0.25 second steps.
The delay function is useful to prevent the MVT10 from replying too quickly.
MASTER
0.25 seconds
REQUEST
RESPONSE
RESPONSE
EXAMPLE 3
0.2 seconds response
Max
EXAMPLE 2
Instant
response
EXAMPLE 1
SLAVE - MVT10
REPLY
REPLY
REPLY
MASTER
0.25 seconds
0.25 seconds
0.25 seconds
REQUEST
RESPONSE
RESPONSE
EXAMPLE 5
Max
0.2 seconds response
+ 0.5 second delay
EXAMPLE 4
Instant
response
EXAMPLE 3
0.25 second response
+ 0.5 second delay
SLAVE - MVT10
DELAY = 0.5 seconds
DELAY = 0.5 seconds
DELAY = 0.5 seconds
REPLY
REPLY
REPLY
Fig. 29 Response time with
0.5 second delay

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Spirax Sarco ILVA20 Specifications

General IconGeneral
Measuring PrincipleVortex Shedding
MaterialStainless steel
ApplicationLiquid and gas flow measurement
SizesDN15 to DN300
Output4-20 mA
Process ConnectionFlanged
Protection ClassIP67
Pressure RatingPN40
Temperature Limit-40 to 250 °C (-40 to 482 °F)
Measuring RangeDepends on medium and pipe size
Process Temperature-40 to 250 °C (-40 to 482 °F)

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