Yokogawa EJX438A Uživatelský manuál stáhnout pdf (Strana 8)

2. Contents of change

(I) Transmitter Mounting (for EJA118E, EJX118A,

EJA438E, and EJX438A)

Please replace the original contents as follows when

the transmitter cannot be installed at least 600 mm

below the HP process connection.

IMPORTANT

The transmitter should be installed at least 600 mm below

the high pressure (HP) process connection to ensure a

positive head pressure of ll uid. Pay special attention to

vacuum applications.

If it can not be installed at least 600 mm below the HP

process connection, please use the equation below:

h= × 0.102 [mm]

(P–P0)

h: Vertical height between the HP process connection

and the transmitter (mm)

h≤0: Install the transmitter at least h (mm) below the

HP process connection

h>0: Install the transmitter at most h (mm) above the

HP process connection

P: Pressure in the tank (Pa abs)

P0: Minimum working pressure limit of the transmitter (Pa

abs). See below table.

[For ll uid code A, B, C, D, E]

Wetted parts

material code

Capillary

length

Process connection size

code

2, 8 3 4,W

1 to 5m 6790 3190

6 to 10m 10030 3520

1 to 5m 6790 3190

6 to 10m 10030 3520

1 to 5m 3190

6 to 10m 3520

1 to 5m 19150 6140

6 to 10m 8290

1 to 5m 9620 3620

6 to 10m 4210

1 to 5m 9540 4750

6 to 10m 6050

[For ll uid code 1, 2, 4]

Wetted parts

material code

Capillary

length

Process connection size

code

2, 8 3 4,W

1 to 5m 2570 320

6 to 10m 4680 530

1 to 5m 2570 320

6 to 10m 4680 530

1 to 5m 320

6 to 10m 530

1 to 5m 10220 2050

6 to 10m 3450

1 to 5m 4270 570

6 to 10m 960

ds: Specic gravity of ll uid (at 25°C). See below table.

Fill uid code A, 1, 4 B C, 2 D E

ds: Specic

gravity

1.07 0.94 1.09

1.90 to

1.92

1.09

(II) Capillary Fill Fluid Density Compensation (for

EJA118E, EJX118A, EJA438E, and EJX438A)

Please use the following constant value [B] of ll uid

for the capillary ll uid density compensation when ll

uid code 1, 2, or 4 is specied.

Table A. Constant value [B] of ll uid

Fill uid code 1, 2, 4

Constant value [B] mmH

O 0.75

Kgf/cm

0.0000745

kPa 0.00745

mbar 0.07453

atm 0.000074

inH

O 0.02992

psi 0.00108

mmHg 0.05592

1 2 3 4 5 6 7 8 9 10

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