Siemens HydroRanger 200 HMI, Руководство по эксплуатации

Страница: 243 / 404

Parameter reference
8.6 Setup (2.)
HydroRanger 200 HMI
Operating Instructions, 06/2018, A5E36281317-AC
241
Use this parameter when the reported head is consistently high or low by a fixed amount.
Before using this feature, verify the following parameters are correct:
● Empty (2.2.4.) (Page 170)
● Process Temperature (2.11.1.3.) (Page 218)
● Offset Reading (2.12.6.) (Page 238) = 0
● Zero Head (2.13.4.5) (Page 244)
To measure with "head" steady:
1.
Measure the actual head (with a tape measure or solid rule).
2. Enter the actual head value.
The deviation between the entered Empty (2.2.4.) (Page 170) value and the calibrated
Empty value is stored in Offset Correction (2.11.1.9.) (Page 221). Alternatively, the Empty
(2.2.4.) (Page 170) can be corrected directly.
8.6.13.4 Basic setup (2.13.4.)
Flow exponent (2.13.4.1)
Sets the exponent for the flow calculation formula.
Index Single-point model Dual-point model
Global Transducer
Values Range: -999 ... 9999
Preset: 1.55
Altered by Primary measuring device (2.13.2.) (Page 240)
Related
•
Maximum head (2.13.4.2.) (Page 243)
•
Maximum flow (2.13.4.3.) (Page 243)
•
Zero head (2.13.4.5.) (Page 244)
Use this parameter if the Primary Measuring Device (2.13.2.) (Page 240) is set to
Exponential devices. It creates an exponential curve with end points set by Maximum Head
(2.13.4.2.) (Page 243) and Maximum Flow (2.13.4.3.) (Page 243) and with the curve based
on the specified exponent.