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Help Center4-20mA Differential Pressure Transmitter (A+E-920C)
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4-20mA differential pressure transmitter A920C
A920C pressure / differential pressure transmitter is used to measure the density,
pressure and liquid level of the liquid, gas or steam, then converts them to 4~20mA DC
current signal output. A920C can communicate with HART manual operator to
complete setting and surveillance, etc.
Specifications
1. The reference accuracy for adjusting measuring range:(Including linearity,
hysteresis and repeatability that begins from zero point, )
2. ±0.2%If the measuring range is smaller than the upper limit of the measuring range:
3. ±[0.15+0.05 measuring range upper limit / measuring range]%
Ambient temperature impact: Total influence quantity/28 degree (50°F)
Diaphragm capsule Impact
2 ±[0.08% measuring range +0.09% upper limit of measuring range]
3 ±[0.07% measuring range+0.02% upper limit of measuring range]
4 ±[0.07% measuring range+0.02% upper limit of measuring range]
5 ±[0.07% measuring range+0.03% upper limit of measuring range]
6 ±[0.07% measuring range+0.03% upper limit of measuring range]
7 ±[0.07% measuring range+0.03% upper limit of measuring range]
8 ±[0.07% measuring range+0.03% upper limit of measuring range]
9 ±[0.07% measuring range+0.03% upper limit of measuring range]
4. Static Pressure Influence:
a. Measuring range code 3: ±[0.1% measuring range+0.052% upper limit of
measuring range]/3.4MPa{500psi}
b. Measuring range code 4, 5, 6: ±[0.1%measuring range+0.028%upper limit of
measuring range]/6.9MPa{1000psi}
5. Stability (M,H and V diaphragm capsule): ±0.2% upper limit of measuring
range/60 monthsZero
6. Adjustment: The zero point can be PV zeroed within the upper and lower limit
of measuring range.
7. Installation position changes parallel to the membrane surface will not result in zero shift.
if the installation position changes exceed 90°against membrane surface, the zero
shift within 0.4kPa can be adjusted through zero adjustment.
8. Output: 2-wire system, 4~20mA DC output, digital communication, it can
be programmed to set linearity or square root.
9. Ambient Temperature:
(-40~85) degree (-40~185°F)
(-30~80) degree (-22~176°F) [with LCD header]
10. Liquid contact temperature: (-40~120) degree (-40~248°F)
11. Ambient Humidity: (5~100)%RH
Installation
1. Power supply and loading condition
2. The supply voltage is 24V and the maximum load is 570Ω.
3. Supply voltage:
a. 10.5~42V DC (Working condition)
(10.5~30V DC intrinsic safety type)
b. 16.4~42V DC (digital communication and HART Protocol)
(16.4~30V DC intrinsic safety type)Load:
4. 0~1335Ω (working condition)
5. 250~600Ω (digital communication)
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