KROHNE MFC 300 EN - Manual (Page 119)

OPERATION
6
119
MFC 300
www.krohne.com 02/2012 - 4000498602 - MA MFC 300 R03 en
Typical frequency values (at 20°C / 68°F)
Problems with zero calibration
1 Stop the flow.
2 Set the counter in Fct. C3.y.1 to totaliser.
3 Set the low flow cutoff in Fct. C3.y.3 to zero.
4 Perform automatic zero calibration.
5 Reset totaliser and count for 2 minutes.
6 Compare the added value to the specified zero calibration stability.
Possible causes of poor zero calibration:
• Valves not completely closed, air or gas bubbles or deposits on measuring tube
Size Titanium Stainless steel Hastelloy ® Tantalum
Empty Water Empty Water Empty Water Empty Water
1000 - 15 438±10 412±10
1000 - 25 605±20 523±20
1000 - 40 494±10 414±10
1000 - 50 583±10 453±10
2000 - 100 341±6 267±6
2000 - 150 330±6 259±6
2000 - 250 299±6 227±6
3000 - 01 258±6 251±6 266±6 258±6
3000 - 03 320±6 310±6 320±6 310±6
3000 - 04 455±6 435±6 455±6 435±6
7000 - 06 316±10 301±10 374±10 362±10
7000 - 10 406±10 371±10 441±10 417±10 439±10 416±10 348±10 330±10
7000 - 15 502±10 432±10 578±10 519±10 566±10 509±10 430±10 394±10
7000 - 25 614±10 483±10 692±10 580±10 687±10 581±10 515±10 449±10
7000 - 40 462±10 367±10 558±10 467±10 556±10 468±10 417±10 360±10
7000 - 50 488±10 357±10 514±10 418±10 539±10 431±10 403±10 333±10
7000 - 80 480±10 338±10 490±10 370±10 493±10 381±10
8000 - 15 226±3 202±3
8000 - 25 280±3 242±3
8000 - 40 271±3 238±3
8000 - 80 241±3 22±3
8000 - 100 264±3 228±3
INFORMATION!
For best results, perform zero calibration with the medium at operating temperature.
.book Page 119 Monday, February 6, 2012 11:01 AM