User`s manual

<2. Handling Cautions>
2-3
IM 01C25B01-01E
(b) Never apply a voltage exceeding 500 V DC
(100 V DC with an internal lightning protector)
for the insulation resistance test, nor a voltage
exceeding 500 V AC (100 V AC with an internal
lightning protector) for the dielectric strength
test.
(c) Before conducting these tests, disconnect
all signal lines from the transmitter terminals.
The procedure for conducting these tests is as
follows:
•InsulationResistanceTest
1) Short-circuit the + and – SUPPLY terminals
in the terminal box. In case of 1 to 5 V output,
short-circuit the SUPPLY+, SUPPLY – and A
(VOUT +) terminals.
2) Turn OFF the insulation tester. Then connect
the insulation tester plus (+) lead wire to the
shorted SUPPLY terminals and the minus (–)
leadwire to the grounding terminal.
3) Turn ON the insulation tester power and
measure the insulation resistance. The voltage
shouldbeappliedasbrieyaspossibletoverify
thattheinsulationresistanceisatleast20MΩ.
4) After completing the test and being very careful
not to touch exposed conductors disconnect the
insulationtesterandconnecta100kΩresistor
between the grounding terminal and the short-
circuiting SUPPLY terminals. Leave this resistor
connected at least one second to discharge any
static potential. Do not touch the terminals while
it is discharging.
•DielectricStrengthTest
1) Short-circuit the + and – SUPPLY terminals
in the terminal box. In case of 1 to 5 V output,
short-circuit the SUPPLY+, SUPPLY – and A
(VOUT +) terminals.
2) Turn OFF the dielectric strength tester. Then
connect the tester between the shorted
SUPPLY terminals and the grounding terminal.
Be sure to connect the grounding lead of the
dielectric strength tester to the ground terminal.
3) Set the current limit on the dielectric strength
tester to 10 mA, then turn ON the power and
gradually increase the test voltage from ‘0’ to
thespeciedvoltage.
4)Whenthespeciedvoltageisreached,holdit
for one minute.
5) After completing this test, slowly decrease the
voltage to avoid any voltage surges.
2.9 Installation of an Explosion-
Protected Instrument
NOTE
For FOUNDATION Fieldbus explosion protected
type, please refer to IM 01C22T02-01E.
For PROFIBUS PA explosion protected type,
please refer to IM 01C25T04-01EN.
Ifacustomermakesarepairormodicationto
an intrinsically safe or explosionproof instrument
and the instrument is not restored to its original
condition, its intrinsically safe or explosionproof
construction may be compromised and the
instrument may be hazardous to operate. Please
contact Yokogawa before making any repair or
modicationtoaninstrument.
CAUTION
Thisinstrumenthasbeentestedandcertied
as being intrinsically safe or explosionproof.
Please note that severe restrictions apply to this
instrument’s construction, installation, external
wiring, maintenance and repair. A failure to abide
by these restrictions could make the instrument a
hazard to operate.
WARNING
Maintaining the safety of explosionproof
equipmentrequiresgreatcareduringmounting,
wiring,andpiping.Safetyrequirementsalso
place restrictions on maintenance and repair.
Please read the following sections very carefully.
WARNING
The range setting switch must not be used in a
hazardous area.