K-Patents PR-01-S - Manual (Page 98)

INSTRUCTION MANUAL FOR K-PATENTS PR-01-S (-AX/FM/CS) DOCUMENT/REVISION No. INM 1/14
Effective: May 15, 2009
96
12. INTRINSICALLY SAFE REFRACTOMETER PR-01-S-AX/FM/CS
References to this chapter in this manual are written in italics.
The Intrinsically Safe Process Refractometer is used in locations made hazardous by the presence of
flammable mixture of gas and air. EN 50 020, the relevant CENELEC apparatus standard, defines an
intrinsically safe circuit as:
“A circuit in which no spark or any thermal effect produced in the test conditions prescribed in this
standard (which include normal operation and specified fault conditions) is capable of causing
ignition of a given explosive atmosphere.”
PR-01-S-AX is certified by KEMA Quality B.V. under the European ATEX directive 94/9/EC for ATEX
EX II 1 G / Cenelec Eex ia IIC T4. The EC-Type Certificate Number is KEMA 03ATEX 1364X.
PR-01-S-FM is certified by Factory Mutual Research Corporation, Approval No. 2Y7A7.AX for Class I,
Division 1, Groups A, B, C, D, indoor hazardous (classified) locations. Temperature identification rating
for PR-01-S-FM is T4 (T
amb
= 45 °C).
PR-01-S-CS is certified by Canadian Standards Association for Class I, Groups A-D. The Certificate
Number is LR113053-1.
Note. Servicing of PR-01-S-AX/FM/CS is only allowed for trained service personnel of K-Patents
representatives. Servicing must be done according to separate instructions defined by K-Patents and must
be reported to K-Patents.
12.1. EQUIPMENT
The Intrinsically safe K-Patents Process Refractometer consists of (Figure 12.10): A modified
refractometer sensor PR-01-S-AX/FM/CS, a standard Indicating transmitter, three barriers, a barrier power
unit and cabling.
A B C D
7
4
1
0
8
5
2
.
9
6
3
- ENTER RESET
K-PATENTS
PROCESS IN STRUMENT S
1
2 3 4
5
6 7
1. Sensor PR-01-S-AX/FM/CS
2. Armoured cable PR-8060
Shielded cable PR-8050 3. Barrier unit PR-7078
4. Interconnecting cable PR-8040
5. Indicating transmitter IT-R
6. Output signal
7. Line power supply
Hazardous area Safe area
Figure 12.10 Intrinsically safe equipment.