EDS3-134A Datasheet, PDF (2/8 Pages) Fuji Electric – INFRARED GAS ANALYZER FOR HEAT TREATMENT FURNACES

ZFG
• Contact output:
1a relay contact (250V AC/2A, resistive
load)
Instrument error (standard), range iden-
tification signal (optional)
All relay contacts are isolated mutually
from the internal circuit.
• Contact input (optional):
No-voltage contact (ON/0V, OFF/5V
DC, 5mA flowing at ON)
Remote range changeover input, re-
mote hold input
Isolated from the internal circuit with
photocoupler. Contact inputs are not
isolated from one another.
• Power supply: Rated voltage 100 to 240V AC
Operating voltage 85 to 264V AC
Frequency; 50Hz/60Hz
Power consumption; 50VA max.
• Operation conditions:
Ambient temperature; -5 to 45°C
Ambient humidity; 95% RH or less, no
condensation
• Storage conditions:
Ambient temperature; -20 to 60°C
Ambient humidity; 95% RH or less, no
condensation
• Dimensions (H × W × D):
211 x 218 x 257 mm
• Mounting dimensions:
Panel flash-mount type (vertical mount-
ing on panel)
• Weight:
About 5 kg
• Finish color: Off-white (Munsell 10Y7.5/0.5 or
equivalent)
• Enclosure: Steel casing, for indoor use
• Material of gas-contactingparts:
Gas inlet/outlet; SUS304,
Sample cell; SUS304/neoprene rubber,
Infrared-ray transmitting window; CaF2,
Internal tubing; Toaron
• Gas inlet/outlet:
Rc1/4 or NPT1/4 internal thread (as
specified)
• Purge gas flow rate:
1 L/min (to be purged as required)
• External terminal:
Power terminal; M4 screw,
Others; M3.5 screw
Performance
• Repeatability: Within ±0.5% of full scale
• Linearity:
Max.±1.0% of full scale (max.±2.0%
of full scale when range ratio is 1:4 or
1:5)
• Zero drift:
Within ±2% of full scale/week
• Span drift: Within ±2% of full scale/week
• Response time (for 90% FS response):
Within 10 seconds
• Interference from other gas components:
Within ±2%
• Warm-up time: Approx. 30 minutes
Description of functions
• Automatic OFF function (standard):
After OFF time is set, the LCD backlight
automatically turns off when no key is
operated. Press any key to turn on.
• Output signal holding (standard):
By setting an output hold to ON, analog
output signal is held in the value just
before the manual calibration.
• Instrument error contact output (standard):
When the main unit is abnormal, con-
tact signal output is provided.
• CP calculation (optional):
The carbon potential of carburizing
furnace and conversion furnace are
calculated using furnace temperature
(fixed input value) and CO concentration
value (fixed or measured value) while
referring to CO2 measured value.
Formula;
CP = ^{CPS × (PCO)2}
K1 × PCO₂
CPS ; Saturated carbon concentration (partial
pressure)
0.0028t−1.30 (800°C ≤ t < 850°C)
0.0030t−1.47 (850°C ≤ t < 950°C)
0.0034t−1.85 (950°C ≤ t < 1000°C)
t ; Furnace temperature (°C)
PCO ; CO concentration value (partial pressure)
PCO2 ; CO2 concentration value (partial pressure)
K1 ; Constant K1=10 (9.06–15966/T)
T ; Rankine temperature (t×9/5+32+460)
• Remote output holding (optional):
Output signal is held at the latest value
or setting value by short-circuiting the
remote output holding input terminals.
Holding is maintained while the termi-
nals are short-circuited.
Indication values will not be held.
• Remote range changeover (optional):
Range is selected by the contact input
signal. Changeover is effective only
when remote range setting is turned
on. In this case, measuring range can-
not be changed manually. When the
contact input terminals for each compo-
nent are short-circuited, the first range
is selected, and it is changed over to
the second range when the terminals
are open.
• Range identification signal (optional):
The present measuring range is
identified by a contact signal. When
the contact output terminals for each
component are closed, the first range is
selected, and it is changed over to the
second range when the terminals are
open.
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