Yokogawa EJA438E Diaphragm Sealed Gauge Pressure Transmitter
Yokogawa EJA438E -JH Diaphragm Sealed Gauge Pressure Transmitter
The EJA438E Diaphragm Sealed Gauge Pressure
Transmitters can be used to measure liquid, gas,
or steam pressure.
- Power Supply Effects(Output signal code D and J)
±0.005 % per Volt (from 21.6 to 32 V DC, 350Ω) - Response Time (All capsules) “◊”
200 ms (approximate value at normal temperature)
When software damping is set to zero and including
dead time of 45 ms (nominal) - Weight
Flush type: 9.8 kg (21.6 lbs)
(3-inch ANSI Class150 flange, capillary length 5 m;
without integral indicator and mounting bracket.)
Extended type: 12.2 kg (26.9 lbs)
(4-inch ANSI Class150 flange, extention length
(X2)=100 mm, capillary length 5 m; without integral
indicator and mounting bracket.)
Add 1.5kg (3.3lb) for Amplifier housing code 2.
Yokogawa EJA438E Diaphragm Sealed Gauge Pressure Transmitter
Yokogawa EJA438E -JH Diaphragm Sealed Gauge Pressure Transmitter
□ NORMAL OPERATING CONDITION
(Optional features or approval codes may
affect limits.)
Ambient Temperature Limits
−40 to 60°C (−40 to 140°F)
−30 to 60°C (−22 to 140°F) with LCD display
(Note: The ambient temperature limits must be within the
fill fluid operating temperature range, see table 1.)
Process Temperature Limits
See table 1.
Ambient Humidity Limits
0 to 100% RH
Working Pressure Limits
See table 1.
For atmospheric pressure or below, see figure 1-1,
1-2, 1-3, 1-4, and 1-5.
Supply Voltage “◊”
For 4 to 20 mA HART / BRAIN
(Output signal code D and J)
10.5 to 42 V DC for general use and flameproof type.
10.5 to 32 V DC for lightning protector
(option code /A.)
10.5 to 30 V DC for intrinsically safe, type n, or nonincendive.
Minimum voltage limited at 16.6 V DC for digital
communications, BRAIN and HART
For 1 to 5 V HART (Output signal code Q)
Power supply :
9 to 28 V DC for general use and flame proof type.
Power Consumption :
0.96 mA to 3 mA, 27 mW