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10 Product Specifications 10-1. List of specifications
SD-1DGH-AS
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10
Product Specifications
10-1. List of specifications
[SD-1DGH-AS] <ATEX/IECEx Specifications>
Detection principle Semiconductor
Gas to be detected Combustible/toxic gas
Applicable gas detector head SD-1DGH
Concentration display Seven-segment LED (four-digit)
Detection range Depends on the gas to be detected
Display resolution Depends on the gas to be detected
Detection method Aspirator suction type
Sampling condition Equivalent to atmospheric pressure (compressed air: 0.1 - 0.7 MPa, maximum use amount: 3
L/min <converted into atmospheric pressure>)
Suction flow rate 0.8 ± 0.1 L/min
Alarm setpoint Depends on the gas to be detected
Power display POWER lamp on (green)
External output Gas concentration signal/alarm contact (gas alarm or fault alarm, gas/fault common alarm)
Alarm accuracy
(under the same conditions) Within ±25% of the alarm setpoint value (combustible gas)/Within 30% of the alarm setpoint
value (toxic gas)
Response time
(under the same conditions) Within 30 or 60 seconds after providing the gas 1.6 times the alarm setpoint (depending on the
gas to be detected)
Gas alarm type One-step alarm (H)
Gas alarm display ALM lamp on (red)
Gas alarm pattern Auto-reset
Fault alarm/self diagnosis System abnormalities/sensor abnormalities
Fault alarm display FAULT lamp on (yellow)/detail display
Fault alarm pattern Auto-reset
Alarm contact No-voltage contact 1a, de-energized (energized in response to an alarm) or energized
(de-energized in response to an alarm)
Contact capacity 250 VAC - 0.5 A/30 VDC - 0.5 A (resistant load)
Transmission system 3-wire type analog transmission (common cable for power and signal <power, signal, common>)
Transmission specifications 4 - 20 mA DC (linear/load resistance under 300 Ω , resolution divided into 200)
Transmission cable CVVS1.25 sq - 3-core or CVVS1.25 sq - 5-core (when the contact is used)
Transmission distance Below 1.25 km
Power supply 24 VDC (17 – 26.4 VDC)
Power Consumption Maximum 3.1 W
Cable connecting port Pressure proof packing gland
(Cable gland<G3/4> or Adapter A<NPT1/2> or Adapter B<NPT3/4>)
Tube connecting port Gas IN: Rc1/4 (O.D ø6-1t, half-union for Cu or SUS tube <Bs or SUS> supplied)
OUT: O.D ø8-1t, flare union for Cu or SUS tube (Bs or SUS)
Compressed air IN: O.D ø8-1t, flare union for Cu tube
Initial clear Approx. 25 seconds
Operating temperatures -20 - 60ºC (at a constant condition)
Operating humidities Below 95% RH (Non-condensing)
Structure Wall mounting sampling unit (Cu or SUS type)
Explosion-proof structure Flame-proof enclosures
Explosion-proof class
II
2G Ex db
II
C T5 Gb (ATEX) / Ex db
II
C T5 Gb (IECEx)