Yokogawa EJA210 Flange Mounted Differential Pressure Transmitter

Introduction

The high performance flange mounted differential pressure transmitter models EJA210A and 220A can be used to measure levels of densities of solidifying or precipitating liquids. Both output a 4 to 20 mA DC signal corresponding to the measured differential pressure. Models EJA210A and 220A also feature remote setup and monitoring through communications with the BRAIN™ terminal and CENTUM CS™ or XL™ or HART® 275 host.

Feature

Functional specifications

1)Zero Adjustment Limits
Zero can be fully elevated or suppressed, within the Lower and Upper Range Limits of the capsule.

2)External Zero Adjustment
External zero is continuously adjustable with 0.01 % incremental resolution of span. Span may be
adjusted locally using the digital indicator with range switch.

3)Mounting Position Effect
Rotation in diaphragm plane has no effect. Tilting up to 90° will cause zero shift up to 0.4 kPa {1.6 inH2O}
which can be corrected by the zero adjustment.

4)Output
Two wire 4 to 20 mA DC output with digital communications, linear or square root programmable. BRAIN
or HART FSK protocol are superimposed on the 4 to 20 mA signal.

5)Failure Alarm
Output status at CPU failure and hardware error;
Up-scale: 110%, 21.6 mA DC or more(standard)
Down-scale: -5%, 3.2 mA DC or less-2.5%, 3.6 mA DC or less (Optional code /F1)
Note: Applicable for Output signal code D and E

6) Damping Time Constant (1st order)
The sum of the amplifier and capsule damping time constant must be used for the overall time constant.
Amp damping time constant is adjustable from 0.2 to 64 seconds.

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