RKI Instruments GD-70D Series - Page 121

- 121 - GD-70D
NCU
SGU
OSU *5
Detection
principle
New ceramic Semiconductor Galvanic cell type
Gas to be
detected
Combustible gas
Combustible gas
Toxic gas
Oxygen
Detection range
See Full Scale and Alarm
Points on page 123
See Full Scale and Alarm
Points on page 123
See Full Scale and Alarm
Points on page 123
Detection method
Pump suction type
Alarm setpoint
value
See Full Scale and Alarm
Points on page 123
See Full Scale and Alarm
Points on page 123
See Full Scale and Alarm
Points on page 123
Alarm accuracy
±25% *3
Combustible: ±25% *3
Toxic: ±30% *3
±1 vol%
(Accuracy of the reading:
±0.7 vol%)
Alarm delay time
30 seconds or less *4
Combustible: 30 seconds or
less *4
Toxic: 60 seconds or less
*4
5 seconds or less *6
(90% response: within 30
seconds)
Alarm type
Two-step alarm
(H-HH)
Two-step alarm
(L-LL, L-H)
Power
consumption
Approx. 3W (Max. 5.5W) Approx. 2.5W (Max. 5W) Approx. 1.5 W (Max. 4 W)
Power
consumption (EA)
24 V: Approx. 4.5W
(Max. approx. 6.5W)
PoE: Approx. 5.5W
(Max. approx. 8.5W)
24 V: Approx. 4W
(Max. approx. 6W)
PoE: Approx. 5.5W
(Max. approx. 7W)
24 V: Approx. 3W
(Max. approx. 5W)
PoE: Approx. 4.5W
(Max. approx. 7W)
Power
consumption(DV)
Approx. 3.5W (Max. 6W) Approx. 3W (Max. 5.5W) Approx. 2 W (Max. 4.5 W)
Operating
temperature
(at a constant
condition)
0 - 40ºC
Operating
humidities
(Non-condensing)
95%RH or less
*1
Pyrolyzer unit combination specification. For information on the specifications of the
pyrolyzer unit (PLU-70), see the separate operating manual.
*2
The operating temperature/humidity may be different depending on the gas to be
detected.
*3
To the alarm setpoint value
*4
By providing the gas 1.6 times the alarm setpoint (excluding delay in the tube and in the
communication)
*5
Oxygen deficiency specification
*6
By letting the detector detect the gas of 10 - 11 vol% (excluding delay in the tube and in
the communication).
NOTE
For information on other specifications such as oxygen leak specifications (OSU), please contact RKI.