YOKOGAWA PH8EHP, User Manual, Page: 4 / 27

IM 12B7J2-01E
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Conditions of use:
(1) Use in combination with an internally isolated transmitter, or use with, a transmitter in
combination with isolated barrier.
The FLXA21 is internally isolated.
(2) Upper limit of the process temperature.
The upper limit of process temperature is indicated below when the sensor is used in
combination with a YOKOGAWA transmitter.
For FLXA21, model and suffix code below is available.
FLXA21-D-□-D-EA-P1-○-A-N-LA-N-NN
□ can be any value.
○ must be NN or P1.
Any option code is available.
For PH202S, model and suffix code below is available.
PH202S-○-E
○ must be C or U.
There are no PH202S models that meet the Korean explosion proof standards.
Any option code is available.
Upper limit of process temperature on the PH8EHP
Transmitter used in combination FLXA21 PH202S
Ambient temperature Ta
Temperature class
40°C 60°C 40°C 60°C
T6 16 16 28 28
T5 50 31 50 43
T4 50 50 50 50
T3 50 50 50 50
T2 50 50 50 50
T1 50 50 50 50
Other warnings are provided in the following.
WARNING
Handling precautions:
(1) Potential electrostatic charging hazard Electrostatic charge may cause an explosion hazard.
Avoid any actions that cause the generation of electrostatic charge, e.g., rubbing with a dry
cloth.
(2) Because the solution ground tip contains titanium, ignition sources due to impact and friction
sparks are excluded.
(3) IEC60079-14 (Electrical installations in hazardous areas) requires a label indicating ‘simple
apparatus’, stick this label to this sensor if necessary.
11th Edition : Nov.20,2018-00