<2. Notes on Handling>
2-8
IM 01C50B01-01E
• The above parameters apply when one of the
two conditions below is given:
- the total Li of the external circuit (excluding
the cable) is < 1% of the Lo value or
- the total Ci of the external circuit (excluding
the cable) is < 1% of the Co value.
• The above parameters are reduced to 50%
when both of the two conditions below are
given:
- the total Li of the external circuit (excluding
the cable) is ≥ 1% of the Lo value and
- the total Ci of the external circuit (excluding
the cable) is ≥ 1% of the Co value.
• The reduced capacitance of the external circuit
(including cable) shall not be greater than 1μF
for Group IIB and 600nF for Group IIC.
Note 3. Installation
• All wiring shall comply with local installation
requirements. (refer to the installation diagram)
• Cable glands, adapters and/or blanking
elements shall be of Ex “n”, Ex “e” or Ex “d” and
shall be installed so as to maintain the specified
degree of protection (IP code) of the equipment.
Note 4. Operation
• Keep strictly the “WARNING” on the label on
the transmitter.
WARNING: POTENTIAL ELECTROSTATIC
CHARGING HAZARD
- SEE USER’S MANUAL
Note 5. Maintenance and Repair
• The instrument modification or parts
replacement by other than authorized
representative of Yokogawa Electric
Corporation is prohibited and will void ATEX
Intrinsically Safe “ic“.
Note 6. Special Conditions for Safe Use
WARNING
• Precautions shall be taken to minimize the
risk from electrostatic discharge of painted
parts.
• The dielectric strength of at least 500 V a.c.
r.m.s between the intrinsically safe circuits
and the enclosure of the Model YTA series
temperature transmitter is limited only by the
overvoltage protection.
• Nonmetallic stickers which include no
information for intrinsic safety can be applied
on the surface of enclosure as long as each
surface area of the sticker is less than 400
mm
2
.
• Electrostatic charge may cause an explosion
hazard. Avoid any actions that cause the
generation of electrostatic charge, such as
rubbing with a dry cloth on coating face of
the product.
• If the equipment is affected by external
sources of heating or cooling from plant
facilities, make sure that the parts in contact
with the equipment or in the near vicinity of
the equipment do not exceed the ambient
temperature range of the equipment.
Temperature Transmitter
Electrical data are as follows;
Supply Input (Terminals: + and -)
Ui = 30 V
Ci = 28 nF
Li = 730 μH
Sensor Output (Terminals: 1 to 5)
Uo = 9 V
Io = 40 mA
Po = 90 mW
Co = 0.7 μF
Lo = 10 mH
SUPPLY
SUPPLY
SENSOR
Associated Apparatus
Hazardous Area
Non-hazardous Area
+
–
+
–
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