Oval EL4301, Instructions Manual

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E-886-2-E
0
12.2 EL4311 Density Computer for Mass Flowmeter (with solids proportion calculation feature)
Table 12.2
Item Description
Input
signals
Flow input
2-wire voltage pulse
Speed of response 2kHz
Open collector pulse
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
Pulse output
Total mass flow Static relay Capacity: 230AC/340VDC 0.2A
Pulse width: 1ms/50ms
Total solids content
Output sync with flow input Open collector pulse
Alarm output Static relay Capacity: 230VAC/340VDC 0.2A
Analog output
Instant mass flow
Instant solids content rate
Solids proportion or
corrected density
4 to 20mADC (Max. load resistance 500 Ω )
or 1 to 5VDC (Output impedance 250 Ω )
Conversion accuracy: ± 0.1% of F.S.
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 (g/ml, etc.)
Corrected density To the 4th decimal place (g/ml, etc.)
Total mass flow
Same as the output pulse unit (kg, etc.)
Count capacity: 8 digits
Total mass flow of solid content Same as the output pulse unit (kg, etc.)
Instant mass flowrate kg/h, etc.
Instant mass flowrate of solid content kg/h, etc.
Temperature To the 2nd decimal place (when ° C is selected.)
Density period To the 1st decimal place (when μ s is selected.)
Meter error correct. factor To the 5th decimal place
Solids content proportion To the 2nd decimal place (%)
Error alarm Number of errors ＋ 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 corr. ± 0.001g/ml (Factory calib. accuracy: Option)
Corrected density
± 0.002g/ml (with 4 to 20mA or 1 to 5VDC temp. input)
± 0.006g/ml (with temp. input from Pt 100 Ω at 0 ° C,
3-wire) ( ※ 3)
Temperature
Pt 100 Ω at 0 ° C ± 0.3%
4 to 20mADC or 1 to 5VDC
± 0.1% of span 10mV/ ° C
5 ｍ V/ ° C
Total flow of solids content ± 0.2% of R.D.
Clock IC battery backup Lithium battery Battery life: 10 years approx.
Communication (when communica-
tion 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
to the uncorrected density. (Accuracy is shown where density change is constant to the differ-
ence between the temperature input and reference temperature.)