K-Patents PR-23 - Manual (Page 190)

182 PR-23 instruction manual
PROCESS REFRACTOMETER PR-23
Sensor verification
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Sensor information
Serial number: R05676
Test results
Nominal nD Measurement Sensor
at 25°C at
actual
temp.
Measured
nD
Accuracy Result Head
temp.
°C
Head
hum.
%
Supply
current
mA
1 1.3300 1.3297 1.3296 0.0001 pass 30 3 39
2 1.3700 1.3697 1.3696 0.0001 pass 30 3 39
3 1.4200 1.4196 1.4197 0.0000 pass 30 3 39
4 1.4700 1.4697 1.4697 0.0000 pass 30 3 39
5 1.5200 1.5196 1.5196 0.0000 pass 30 3 39
Verification result: pass
Traceability and conformance
Measurements should be done by using Cargille Refractive Index Liquids with
stated in accuracy of ±0.0002 R.I.
Cargille Index of Refraction Liquids are manufactured and calibrated using
instruments whose accuracy is verified by daily comparision to N.I.S.T. (N.B.S.)
traceable standards. N.I.S.T. standards are based on angle measurements using
a Wild divided circle spectrometers.
K-Patents PR-23 Refractometer System: Sensor verification http://192.168.23.250/verif.shtml
1 of 1 2.2.2009 15:21
Figure 13.8 Instrument
verification certificate
13.4 Corrective action
If you get the message VERIFICATION FAILED (Figure 13.9), first check that the prism and
the sample holder are absolutely clean and the sample holder sits tightly on the
sensor tip before a standard liquid is applied. Make sure the standard liquids are in
good condition and not past their expiration date. Also, inspect the prism surface,
checking that it is smooth and glossy without any scratches. Then go back to the
Verification step 2 by pressing soft key
REPEAT and repeat the whole verification
procedure.
You may want to double-check the following, as they are the most common reasons
for a failure of the verification: