Yokogawa EXA PH202 2-Wire pH/ORP Analyzer - Manual (Page 17)

IM 12B07D02-01E
2-4 Specification
mA-HART® communication
A. Input
: Two wire system 4-20 mA
B. Power supply :
PH202G : up to 40 volts
PH202S : up to 31.5 volts
Note: The transmitter contains a switched
power supply, drawing its energy
from the 0-4 mA section of the signal.
Consequently the 17 volt limit is
applied at 4 mA. The characteristic of
the unit is such that above about 7 mA
on the output, the terminal voltage can
drop to 14.5 volts without problem.
(see figure 2-2)
C. Transmission: Isolated output of 4 to 20 mA DC.
D. Signal : Maximum load 425Ω. (see fi gure 2-1)
Burn to signal failure acc.
NAMUR Recommendation NE43
(18.01.1994)
E. Operating range : 3.9 to 21mA
F. Communication
: HART®, 1200 Baud, FSK
modulated on 4 to 20 mA signal
G. Configuration : Local with 6 keys
H. Software : Firmware based on Yokogawa stack.
I. Hardware : Yokogawa HART® Modem F9197UB
J. Other Control systems
: Yokogawa PRM, Rosemount AMS,
Siemens PDM
K. Hand Terminal : Rosemount HHT 275/375
L. Other control systems: Yokogawa PRM,
Rosemount AMS, Siemens PDM
M. Output span :
- pH : min 1 pH, max 20 pH.
(max 90% zero suppression)
: The instrument is user
programmable for linear or non-
linear pH ranges.
N. Cable specification
: 0.5 mm diameter or 24 AWG over
maximum length of 1500 m
O. DD specification
: The PH202 Device Description is
available enabling communications
with the Handheld Communicator
and compatible devices.
mA
NEPSI Certification (PH202S-K)
NEPSI Intrinsically Safe Type
Cert No. GYJ081156X
• Applicable Standard:
GB3836.1-2000, GB3836.4-2000
• Type of Protection and Marking Code:
Ex ia IIC T4/T6
• Ambient Temperature :
T6; –10 to 40°C, T4; –10 to 55°C
Note 1 Entity Parameters
• Intrinsically safe input parameters
(terminal + and -):
Maximum Input Voltage (Ui) = 31.5 V
Maximum Input Current (Ii) = 100 mA
Maximum Input Power (Pi) = 1.2 W
Maximum Internal Capacitance (Ci) = 22 nF
Maximum Internal Inductance (Li) = 35 μH
• Intrinsically safe output parameters and
maximum external parameters
(terminal 11 and 17):
Uo=14.4 V, Io=32.3 mA, Po=0.12 W, Co=600
nF, Lo=34 mH
Note 2 Installation
• Electrostatic charges on the display window shall
be avoided.
• The external earth connection facility shall be
connected reliably.
• The instrument modification or parts replacement
by other than authorized representative of
Yokogawa Electric Corporation and will void
NEPSI Intrinsically safe certification.
• The user shall not change the configuration in
order to maintain/ensure the explosion protection
performance of the equipment. Any change may
impair safety.
• For installation, use and maintenance of
the product, the end user shall observe the
instruction manual and the following standards:
GB50257-1996 "Code for construction and
acceptance of electric device for explosion
atmospheres and fire hazard electrical
equipment installation engineering''.
GB3836.13-1997 "Electrical apparatus for
explosive gas atmospheres Part 13: Repair and
overhaul for apparatus used in explosive gas
atmospheres".
GB3836.15-2000 "Electrical apparatus for
explosive gas atmospheres- Part 15: Electrical
installations in hazardous area (other than
mines)" .
GB3836.16-2006 "Electrical apparatus for
explosive gas atmospheres- Part 16: lnspection
and maintenance of electrical installation (other
than mines)".
mA