11. Product Specifications
11-1 GD-84D-EX Specifications
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11-1-5 GD-84D-EX-EA-EC
Detection principle
Electrochemical type
Detection target gas
Toxic gases, oxygen
Concentration display
Full-dot display
Detection range
Depends on detection target gas.
Detection method
Pump suction type
Suction flow rate
Total flow rate: approx. 0.6 L/min
Alarm setpoints
Depends on detection target gas.
Power supply
indication
POWER LED lights up (green)
Display items
Gas name display, flow display, mode display, communication status display
Alarm accuracy
(for identical conditions)
Within ±30 % of alarm setpoint (depending on detection target gas)
Alarm delay time
(for identical conditions)
Within 60 seconds after providing gas at 1.6 times the alarm setpoint
(depending on detection target gas)
(not including piping and communication delays)
Gas alarm type
Two-stage alarm (L-LL, L-H, or H-HH)
Gas alarm indications
First alarm: ALM1 LED lights up (red).
Second alarm: ALM2 LED lights up (red).
Gas alarm pattern
Auto-reset or self-latching
Gas alarm contact
No-voltage contact 1a or 1b
Always de-energized (energized in alarm state) or always energized
(de-energized in alarm state)
Fault alarm/self-
diagnosis
System abnormality, sensor abnormality, flow abnormality, communication abnormality,
temperature increase abnormality
Fault alarm indications
FAULT LED lights up (yellow)/information displayed.
Fault alarm pattern
Auto-reset or self-latching
Fault alarm contacts
Overall fault contacts: no-voltage contact 1a or 1b
Always de-energized (energized in alarm state) or always energized
(de-energized in alarm state)
Contact capacity
24 V DC/0.5 A (resistance load)
Contact cable
CVV or equivalent cable (1.25 mm
2
, maximum 18 core)
Transmission method
Digital transmission: Ethernet (10BASE-T/100BASE-TX)
Analog transmission: two-wire analog transmission
(4 - 20 mA DC, non-insulated, resistance load 300
Ω
or less, including cable resistance)
Transmission cable
Digital transmission: Cat5e or better Ethernet cable
Analog transmission: CVVS or equivalent shielded cable
(1.25 mm
2
, maximum eight cores)
Functions
White backlight, alarm delay, suppression, zero follower, sensitivity correction, flow control,
calibration history, alarm trend history, event history
Power cable
CVV or equivalent cable (1.25 mm
2
), two-core
(Shared with digital transmission cable when PoE+ connection is used)
Power source
24 V DC ± 10 % or PoE+ connection
Power consumption
When 24 V DC is connected: approx. 3 W (maximum approx. 8 W)
When PoE+ is connected approx. 4.5 W (maximum approx. 9.5 W)
Pipe connection
openings
Rc1/4 (OD
φ
6-1 t half union for Teflon pipe <PP> supplied
)
Initialization
Approx. 25 seconds
Operating temperature
range
-10 – 40 °C (no sudden changes)
Operating humidity
range
20 – 90 % RH (No condensation; may depend on the sensors installed.)
Construction
Wall mounting type
External dimensions
Approx. 150 (W)
190 (H)
146 mm (D) (excluding projections)
Содержание GD-84D-EX Series
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