YOKOGAWA FU20-FTS Instruction Manual page 18

Differential ph/orp sensor
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18
Remarks:
1
No revision to this drawing without prior approval of FM.
2
Installation must be in accordance with the Canadian Electrical Code (CEC)
CSA22.1, and relevant local codes.
3
The sensor shall be installed to a certified intrinsically safe HOST with the following
maximum values: Uo= 18 V, Io = 170 mA, Po = 400 mW.
4
The sensor does not provide isolation from earth. Installers shall take necessary
measures to prevent the possibility of sparking resulting from differing earth
potentials between the sensors and interconnecting equipment. This can be realized
for example by selecting interconnecting equipment which provides input-to-output
and input-to-earth isolation up to 500 V rms.
5
Sensor Model code:
Table 5:
Model
FU20
ab
cd
efg
h
WARNING-POTENTIONAL ELECTROSTATIC CHARGING HAZARD – SEE
6
INSTRUCTIONS
pH sensors containing accessible plastic parts and/or external conductive parts, must
be installed and used in such a way, that dangers of ignition due to hazardous
electrostatic charges cannot occur, especially in the case that the process medium is
non-conductive.
AVERTISSEMENT –
DANGER POTENTIEL DE CHARGES ÉLECTROSTATIQUES – VOIR LES
INSTRUCTIONS
Les sondes de pH contenant des pièces en plastique accessibles et / ou des pièces
conductrices externes doivent être installées et utilisées de manière à éviter tout
risque d'inflammation dû à des charges électrostatiques dangereuses, en particulier
dans le cas où le fluide de procédé n'est pas conducteur.
IM 12B06J03-05EN-P
Suffix Codes
Option Codes
-ab-cd-efg
/h
Connection
Two alphanumeric characters identifying the length
type:
of the permanent cable, each character from 0 to 9
VP
VS
Temperature
T1
sensor
+ Region:
Type:
FTS PVDF body/Tapered Thread/Dome
MTS PVDF body/Tapered Thread/Dome
RTS PPS body/Tapered Thread/Dome
Option code:
Up to ten alphanumeric characters
(A to Z, 0 to 9 or hyphen)
Connector without ID-chip
Connector with ID-chip
Pt1000, IS for ATEX/IECEx, FM-US,
FM-CAN
shaped/Sodium-ions sensitive
membrane/Silicon&Viton sealings
shaped/Sodium-ions sensitive
membrane/FFKM&EPDM sealings
shaped/Sodium-ions sensitive
membrane/Silicon&VITON sealings

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