Riken Keiki GD-84D-EX Series, Operating Manual

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11. Product Specifications 11-1 GD-84D-EX Specifications
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11
Product Specifications
11-1 GD-84D-EX Specifications
11-1-1 GD-84D-EX-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, 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 Analog transmission: two-wire analog transmission
(4 - 20 mA DC, non-insulated, resistance load 300 Ω or less, including cable resistance)
Transmission 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
Power source 24 V DC ± 10 %
Power consumption When 24 V DC is connected: approx. 2.5 W (maximum approx. 7 W)
Pipe connection
openings
Rc1/4 (OD φ 6-1 t half union for Teflon pipe <PP> supplied
）
Initialization Approx. 25 seconds