Selection method of the hottest Rosemount 3144 tra

Selection method of Rosemount 3144 transmitter

Rosemount 3144 transmitter is a transmitter that we often use. When selecting Rosemount 3144 transmitter, do you master the skills to judge the quality of Rosemount 3144 transmitter? Now let's introduce the selection method of Rosemount 3144 transmitter

1. The reference should be stable. 4mA is the corresponding input zero reference. The reference is unstable. In terms of accuracy linearity, the change of 4mA zero drift within 3 minutes of cold start-up should not exceed 4.000ma0.5%; (i.e. 3..02ma), the voltage drop on the load 250 Ω is 0 005v, foreign IC chips often use expensive energy gap benchmarks, and the temperature drift coefficient changes by 1 per degree. 0ppm must be finely sorted before processing

2. The total current consumed by the internal circuit is 4mA, and the value of the protective voltage ring after setting is equal to 4.000ma. Moreover, the current consumed by the active rectifier filter amplification constant current circuit does not change due to the change of the primary input, and the foreign IC chips use constant current power supply

3. When the working voltage is 24.000v and the full scale is 20.000ma, the reading of full scale 20.000ma will not change due to the change of load Ω; The change shall not exceed 20.000ma0.5%

4. When the full scale is 20.000ma and the load is 250 Ω, the reading of full scale 20.000ma will not change due to the change of working voltage of 15.000v- "30.000v; The change shall not exceed 20.000ma0.5%

5. When the primary side is overloaded, the output current shall not exceed 25.000ma+10%, otherwise the 24V working power supply and a/d input clamping circuit for the transmitter in plc/dcs will be damaged due to excessive power consumption. In addition, the emitter output in the transmitter will also be damaged due to excessive power consumption, and those without a/d input clamping circuit will suffer more

6. When the induced lightning and induced surge voltage between the two lines exceeds 24V, clamp it and do not damage the transmitter; Generally, when the metal separator of two lines has a certain limit on the conveying speed of the detected objects, only TVs transient protection diode 1.5ke in parallel can suppress the impact of positive and negative pulses with a pulse width of 20 milliseconds every 20 seconds, and the transient withstand impact power is 1.5kw-3kw

these factors should be considered in the selection method of Rosemount 3144 transmitter. You must master the specific selection method