Riken Keiki PT2-161, Operating Manual

Page: 60 / 68

10 Product Specifications 10-1. List of specifications
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[SD-1D-AS (TYPE NC)] <ATEX/IECEx Specifications>
Detection principle
New ceramic type
Gas to be detected Combustible gas
Applicable gas
detector head
SD-1D (TYPE NC)
Concentration display Seven-segment LED (four-digit)
Detection range
Depending 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>)
Flow rate 0.8 ± 0.1 L/min
Alarm setpoint 25% LEL [standard setting value]
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% to the alarm setpoint value
Alarm delay time
(under
the same conditions)
Within 30 seconds after providing the gas 1.6 times the alarm setpoint (excluding
delay in the tube)
Gas alarm type One-step alarm (H)
Gas alarm display ALM lamp on (red)
Gas alarm pattern Non latching (auto-reset)
Fault alarm/self
diagnosis
System abnormalities/sensor abnormalities
Fault alarm display FAULT lamp on (yellow)/detail display
Fault alarm pattern Non latching (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 (resistance 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 1.25km
Power supply
24 VDC (17 – 26.4 VDC)
Power consumption Maximum 3 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 grade
Ⅱ 2G Ex db Ⅱ C T5 Gb(ATEX) / Ex db Ⅱ C T5 Gb (IECEx)
External dimensions Approx. 400 (W) x 265 (H) x 102 (D) mm
Weight Approx. 5.6kg
Outer color Munsell 7.5BG5/2
* Specifications subject to changes without notice.
* When a half-union for gas IN side is changed, check also the external filter (IN/OUT diameter) carefully.