IM 01C22K01-01E
2-3
2. HANDLING CAUTIONS
3) Turn ON the insulation tester power and measure
the insulation resistance. The voltage should be
applied short as possible to verify that the insula-
tion resistance is at least 20 M
Ω
.
4) After completing the test and being very careful not
to touch exposed conductors disconnect the
insulation tester and connect a 100 k
Ω
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.
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 specified
voltage.
4) When the specified 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 Explosion
Protected Type
In this section, further requirements and differences and
for explosionproof type instrument are described. For
explosionproof type instrument, the description in this
chapter is prior to other description in this users manual.
For the intrinsically safe equipment and explosionproof
equipment, in case the instrument is not restored to its
original condition after any repair or modification
undertaken by the customer, intrinsically safe construction
or explosionproof construction is damaged and may cause
dangerous condition. Please contact Yokogawa for any
repair or modification required to the instrument.
NOTE
For F
OUNDATION
Fieldbus and PROFIBUS PA
explosion protected type, please refer to IM
01C22T02-01E and IM 01C22T03-00E respec-
tively.
CAUTION
This instrument is tested and certified as intrinsi-
cally safe type or explosionproof type. Please
note that the construction of the instrument,
installation, external wiring, maintenance or
repair is strictly restricted, and non-observance
or negligence of this restriction would result in
dangerous condition.
WARNING
To preserve the safety of explosionproof equip-
ment requires great care during mounting,
wiring, and piping. Safety requirements also
place restrictions on maintenance and repair
activities. Please read the following sections very
carefully.
2.9.1 FM Approval
a. FM Intrinsically Safe Type
Caution for FM intrinsically safe type. (Following
contents refer “DOC. No. IFM012-A12 P.1 and 2.”)
Note 1. Model EJA Series pressure transmitters
with optional code /FS1 are applicable for
use in hazardous locations.
• Applicable Standard: FM3600, FM3610, FM3611,
FM3810, ANSI/NEMA250
• Intrinsically Safe for Class I, Division 1, Groups A,
B, C & D. Class II, Division 1, Groups E, F & G
and Class III, Division 1 Hazardous Locations.
• Nonincendive for Class I, Division 2, Groups A, B,
C & D. Class II, Division 2, Groups E, F & G and
Class III, Division 1 Hazardous Locations.
• Outdoor hazardous locations, NEMA 4X.
• Temperature Class: T4
• Ambient temperature: –40 to 60
°
C
Note 2. Entity Parameters
• Intrinsically Safe Apparatus Parameters
[Groups A, B, C, D, E, F and G]
Vmax = 30 V
Ci = 22.5 nF
Imax = 165 mA
Li = 730
µ
H
Pmax = 0.9 W
* Associated Apparatus Parameters
(FM approved barriers)
Voc
≤
30 V
Ca > 22.5 nF
Isc
≤
165 mA
La > 730
µ
H
Pmax
≤
0.9W
