3. product specifications, Common specifications, Specifications for each model – RKI Instruments GD-70D Series User Manual
Page 7

1 Overview
1-3. Product specifications
- 7 -
GD-70D
1-3. Product specifications
Concentration
Display
Character LCD (Digital and Bar Meter Display)
Suction Flow Rate
0.5L/min
±10%
Power Display
POWER lamp on (green)
Displays
Gas name display/Flow rate indicator/Mode display/Communication status
display/Pyrolyzer connection display
Gas Alarm Display
First: ALM1 lamp on (Red)/Second: ALM2 lamp on (Red)
Gas Alarm
Activation
Auto-reset
Gas Alarm Contact
No-voltage contact 1a or 1b (2 step independent)
de-energized (energized at a time of alarm) or energized (de-energized at a
time of alarm)
Fault Alarm/Self
Diagnosis
System abnormalities/Sensor abnormalities/Flow Rate
abnormalities/Communication abnormalities/Pyrolyzer abnormalities
Fault Alarm
Display
FAULT lamp on (Yellow)/Detail display
Fault Alarm
Activation
Auto-reset
Fault Alarm
Contact
No-voltage contact 1a or 1b
de-energized (energized at a time of alarm) or energized (de-energized at a
time of alarm)
Contact Capacity
125 VAC - 0.25A/24 VDC - 0.5A (Resistant load)
Recommended
Contact Cable
Cable of CVV, etc. (1.25sq) - max. 6-core
Functions
White backlight/Alarm delay/Suppression/Zero follower/Sensitivity correction/
Flow control/Calibration history/Alarm trend history/Event history
Tube Connecting
Hole
Rc1/4 (O.D Φ6-1t half-union for Teflon tube
Initial Clear
Approx. 25 seconds
Structure
Box type/Wall mounted type
External
Dimensions
Approx. 70(W)x120(H)x145(D) mm (projection potions excluded)
Weight
Approx. 0.9 kg
Outer Color
Gas detector: grey
Front door: white
Model
GD-70D
GD-70D-NT
Transmission
System
3-wire type analog transmission
(Common Power Supply
or 2-wire type analog transmission
2-wire type DC power-line
communication
Transmission
Specification
4 - 20 mA DC (no-insulation/load
resistance under 300Ω)
DC power-line communication
system
Recommended
Transmission
Cable
Shielded cable of CVVS, etc. (1.25sq)
3-core or 2-core
Shielded twisted-pair cable
(1.25sq) of KPEV-S, etc. - 1P
Recommended
Power Cable
Cable of CVV, etc.(1.25sq) - 2-core
(Those for 3-wire type are common with
the transmission cable.)
(Common with the transmission
cable)
Power Supply
24VDC
±10%
24VDC
±10%
(Dedicated line by blocking filter)