Riken Keiki GD-3EC, Technical Manual

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10. Product Specifications 10-1 SD-3 specifications
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10-1-2 SD-3 (model with EC barrier)
Model SD-3 SD-3 (contact model)
Specifications Standard Contact
Display 7-segment LED (5 digits)
Sensor F sensor (Riken Keiki)
Detection principle Electrochemical type
Detection target
gas
Depends on sensor specifications.
Detection range Depends on sensor specifications.
Sampling method Diffusion type/suction type (introduced via external unit)
Set flow rate 0.4 - 1.5 L/min
Power supply
indication
Power lamp lit (green)
External output Gas concentration signal (4 - 20 mA DC + HART output)
Alarm setpoints Depends on sensor specifications.
Alarm accuracy Depends on sensor specifications.
Alarm delay time Depends on sensor specifications.
Repeatability (for
identical conditions)
Depends on sensor specifications.
Indication accuracy
(for identical conditions)
Depends on sensor specifications.
Gas alarm type Two-step alarm (H-HH, H-L, or L-LL)
Gas alarm
indication
Alarm lamp lit (red)
Gas alarm reset
operation
Auto reset or self-latching
Fault alarm/self
diagnosis
System abnormality (E-9)/sensor abnormality (E-1)
Fault alarm
indication
Fault lamp lit (yellow)/error code display
Fault alarm reset
operation System abnormality: Self-latching
Sensor abnormality: Auto reset (self-latching if sensor is disconnected)
Contact operation ―
SPDT (× 3):
2 alarms, 1 fault output
250 V AC, 2A; 30 V DC, 1 A (resistance
load)
Minimum load 5 V DC, 0.1 A
Warnings
Sensor life assessment/clock abnormality diagnosis/communication diagnosis/
sensor warning
Warning display Blinking display alternating between gas concentration and error code
Warning operation Same as normal operation
Functions Alarm delay/suppression/HART communication
Transmission
method (4 - 20 mA)
3-wire analog transmission (common power supply <power supply, signal,
common>) or
2-wire analog transmission (current source)
Transmission
specifications
(4 - 20 mA)
4 mA - 20 mA DC (non-insulated linear output)
Maximum load resistance 600 Ω (with derating depending on power supply voltage)
Resolution: max. 250 divisions (depending on specifications)
Transmission cable
(4 - 20 mA)
Shielded cable 1.25 sq (1.38 mm 2 /AWG16) or
2.0 sq (2.08 mm 2 /AWG14) (same as power supply cable)
*To ensure explosion protection, use a cable designed for use in temperatures at
least 5 °C above the maximum anticipated ambient temperature.
Transmission
distance
(4 - 20 mA)
For 1.25 sq (1.38 mm 2 /AWG16): Not exceeding 1.25 km
For 2.0 sq (2.08 mm
2
/AWG14): Not exceeding 2 km (with derating depending on
supply voltage)