Kurz Instruments, Inc. 831-646-5911
2411 Garden Road www.kurzinstruments.com
Monterey, CA 93940
Sensor or Probe Blockage. The duct/pipe area blocked off by the insertion of the
sensor/probe, accelerates the flow reading. This can be adjusted using the Sensor
Blockage Correction Factor (SBCF) on the 454 but is not critical as this effect is
measured during the field calibration.
A
1
A
2
L
d
SBCF = (A1-A2)/A1
SBCF is performed by simply entering the following data:
1. Insertion depth (L) in ft or meters from the end of the probe window to the
duct inside wall.
2. Probe diameter (d) in inches. The 454 comes in ½, ¾ and 1 inch (also known
as 08, 12, 16) versions and the 454P or purge version is a 1 inch unit but must
be selected as such because of its higher blockage.
You press the P key to enter Program Mode, then the access code and E. Now
press P to advance to the “Set Meter #1 Flow” menu then press E then using P
advance to the screen “Next Probe ^v Size 0.750 in” where the ^ v arrows are
used to choose the value followed by E. It will say “new value accepted” if you
make a change. Last press the C key a few times to exit Program Mode.
More extensive programming instructions and the Menu state diagram are found in the
manual.
Flow/velocity Units. The engineering units displayed by the unit are extensive and
can be programmed for the following partial list (please refer to the appropriate product
for more info). Note that actual velocity or flow is not available.
454/504/534 you have these options:
Velocity SFPM, SMPS (only 454)
Flow Rate SCFM, SCFH, SLPM, SCMH
Mass Rate PPM, PPH, KGM, KGH
Temperature DEGF, DEGC
155 Flow Computer
Velocity SFPM, SMPS
Flow Rate SCFM, SCFH, SCMM, SCMH
Mass Rate PPH, KGM
360208-D Models 155, 454FTB, 504FTB, 534FTB 14
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