E-886-2-E
1
12. GENERAL SPECIFICATIONS
12.1 EL4301 Density Computer for Mass Flowmeter
Table 12.1
Item
Description
Input
signals
Temp. input
Resist. thermo-
meter bulb
Pt 100
Ω
at 0
°
C, 3-wire system Rated current 2mA
Analog
4 to 20mADC or 1 to 5VDC, 10mV/
°
C, 5mV/
°
C
Density input
Tube period signal (from L.H. sensor)
±
5V square wave
Output
signals
Analog output
Corrected density
or concentration
(% mass)
4 to 20mADC (Max. load resistance 500
Ω
) or
1 to 5VDC (Output impedance 250
Ω
)
Conversion accuracy:
±
0.1% of F.S.
Alarm output 1
High alarm
With respect to the density corrected for temperature
Static relay 230VAC/340VDC, 0.1A
Alarm output 2
Low alarm
Alarm output 3
Static relay Capacity: 230VAC/340VDC 0.2A
Display type
Display: ST display (128
×
128 dots), backlighted (
※
1), (
※
2)
Information displayed: Data, units, error message simultaneously
Menu
Items
Density before correction To the 4th decimal place (when g/ml is selected.)
Corrected density
To the 4th decimal place (when g/ml is selected.)
Temperature
To the 2nd decimal place (when
°
C is selected.)
Density period
To the 1st decimal place (when
μ
s is selected.)
% Mass
To the 2nd decimal place
Error alarm
Number of error messages
Com-
puting
range
Temperature
Pt 100
Ω
at 0
°
C
Range:
-
50 to +200
°
C
Std. Span: 70
°
C
4 to 20mADC or 1 to 5VDC
Range:
-
200 to +200
°
C
Std. Span: 200
°
C
10mV/
°
C
Range:
-
50 to +150
°
C
5
m
V/
°
C
Range:
-
100 to +200
°
C
Density
0.0000 to 6.0000g/ml
Com-
puting
accuracy
ULTRA
mass
MKII
(CN series)
Density before
correction
±
0.001g/ml (Factory calibration accuracy: Option)
Corrected density
±
0.002g/ml (with 4 to 20mA or 1 to 5VDC temperature
input)
±
0.006g/ml (with temperature input from Pt 100
Ω
at 0
°
C,
3-wire) (
※
3)
Temperature
Pt 100
Ω
at 0
°
C
±
0.3% of span
4 to 20mADC or 1 to 5VDC
±
0.1% of span
10mV/
°
C
5
m
V/
°
C
Clock IC backup battery
Lithium battery Battery life: 10 years approx.
Communication (when communication
interface is provided)
Interface: RS485 Multipoint (Up to 16 units can be connected.)
Dedicated protocol Baud rate: 4800 bps standard 9600 bps max.
Transmission cable
Use 3-conductor shielded cable to the resistance thermometer bulb.
Loop resist. 5
Ω
max. Example: 300 meters max. with 3-conductor 1.25mm
2
cable; 500 meters with 2.0mm
2
cable
Power source
85 to 264VAC, 50/60Hz or 20 to 30VDC
Power consumption
20W max.
Ambient temperature
-
10 to
+
50
°
C
Mounting
Panel mount
Finish
Munsell N1.5
Weight
2.5 kilograms, approx.
NOTES
(
※
1): ST display stands for Super Twisted Nematic display.
(
※
2): Backlight life (luminance declined to one half its original luminance): 2500 hours, approx.
(
※
3): Depends on the accuracies of temperature input and density expansion coefficient of the fluid
with respect to the uncorrected density.
(Accuracy is shown where density change is constant with respect to the difference between
the temperature input and reference temperature.)