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PR-23 instrucon manual
To ensure EHEDG compliant installation, follow the mounting speciics provided on
the mounting drawing supplied by K-Patents with each PR-23-AP refractometer or-
dered with the -EH option.
9.4.8 3A Sanitary Standard compliance
The user should ensure that the refractometer is not a source of contamination to
product due to damaged or worn product contact surfaces. Misuse (e.g. too long prism
wash time or too high wash pressure) or mishandling may result in metal scratches
or roughened surfaces. Such surfaces may not stay clean in processing.
K-Patents offers a 3A Sanitary Standard Accepted repair and maintenance package in
which all wetted parts, prism, gaskets and dryer are replaced. Note that this repair
service can be completed by 3A authorized service center only (K-Patents factory or
regional headquarters).
9.5 Compact process refractometer PR-23-GC
The K-Patents Compact process refractometer PR-23-GC is designed for the general
industry small pipeline and bypass line applications e.g. in chemical, oil, gas, petro-
chemical and kraft pulping processes.
9.5.1 PR-23-GC sensor model code
MODEL AND DESCRIPTION MODEL
PR-23 = Sensor PR-23
Sensor model
-GC = General purpose compact -GC
Refracve Index range limits
-73 = n
D
1.320–1.530 (0–100 Brix) Sapphire prism -73
-74 = n
D
1.260–1.470, Sapphire prism (A) -74
-82 = n
D
1.410–1.620, YAG prism (A) -82
-92 = n
D
1.520–1.730, GGG prism (A) -92
Process connecon
-K = Sandvik L coupling 76.1, inseron length 12 mm -K
Sensor weed parts material
SS = AISI 316 L SS
HA = Alloy 20 HA
HC = Hastelloy C / ASTM C276 HC
NI = Nickel 200 NI
TI = Titanium ASTM B348 TI
SU = AISI 904L SU
XS = SAF2205 XS
Electrical classicaon
-GP = General Purpose -GP
-AX = ATEX cered EX II 3 G Eex nA II T4 (up to Zone 2) -AX
-IA = ATEX and IECEx cered EX II 1 G Ex ia II C T4 Ga (up to Zone 0) -IA
Sensor housing
-SC = Stainless steel AISI 316 -SC
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