Vaisala MAWS201 User's Guide Page 146

  • Download
  • Add to my manuals
  • Print
  • Page
    / 196
  • Table of contents
  • TROUBLESHOOTING
  • BOOKMARKS
  • Rated. / 5. Based on customer reviews
Page view 145
User's Guide _______________________________________________________________________
144 __________________________________________________________________ M210243en-A
FLOW
ADJUSTMENT
LEVEL GAUGE
BY USING
ADJUSTING SCREWS
SINK
UPTURNED BOTTLE
CONSTANT HEAD
9901-033
Figure 119 Dynamic Calibration (Constant Head)
Calculating the Calibration Factor
Using the figures from the dynamic calibration, the calibration factor
can now be read from Table 28 on page 145, or you may wish to
calculate the calibration factor using the following formula.
The nominal amount of tips for a 0.2 mm bucket is 98.7167 tips. Let
N = the number of tips (together with the fractional part left in one
bucket), the calibration factor (C.F.) is then calculated as follows (in
the example below, we will use 99.3 tips as N).
C.F. = Gauge size × Nominal / N
C.F. = 0.2 mm × 98.7167 / 99.3 tips
C.F. = 0.1988 mm / tip
C.F. = 0.199 mm / (tip rounded off)
In other words, each tip corresponds to 0.199 mm of rainfall. Provided
the C.F. falls between 0.197 mm and 0.204 mm it is acceptable for
most purposes. If the C.F. lies outside these limits, repeat the static
and dynamic calibration procedures.
Page view 145
1 2 ... 141 142 143 144 145 146 147 148 149 150 151 ... 195 196

Comments to this Manuals

No comments