GD-70 Sample Draw Gas Detector - SPECIFICATIONS

GD-70 Sample Draw Gas Detector - SPECIFICATIONS
by RKI Instruments

MAIN UNIT

Model	GD-70D	GD-70D-NT	GD-70D-ET
Communication	4-20mA DC	DC power line communication	PoE Method
Detection principle	Different type depending upon sensor unit and detectable gas (see table)
Sampling method	Sample drawing types (auto-adjustment of flow rate) 0.5 / min +/-10%
Display	Large LCD display (white backlight) Gas concentration Flow rate, communication status, Pyrolyzer status, gas detected Error code, content of error
Gas alarms	Two alarm levels: 1st alarm – Red 2nd alarm – Red Fault alarm: Yellow
External output	1st, 2nd, and trouble alarms : Relay contact output for each alarm
Self diagnostic function	System failure, sensor failure, flow failure, communication error NT / ET / Analog
Data logging	Event history, alarm history, calibration history. Alarm trend (180 sec before / after 1st alarm)
Operation temp. & humidity	0 ~ 40ºC, 30 ~ 70% RH (non-condensing)
Operating settings	All operational settings are user adjustable through front panel
Power requirements	DC 24V+/- 10%, approx 1.5W (Max 4W including sensor unit) Note: Approx. 2.5W (Max 5W) with SGU sensor unit		PoE standard arrangement
Dimensions	2.8”W x 4.7”H x 5.9”D (70W x 120H x 150Dmm)
Weight	Approx. 0.9kg (2.0lbs), including sensor unit
Mounting	Wall-mounting base plate by 2 or 3 screws
Sampling tubing	4 x 6mm PTFE tubing recommended. Tube fittings provided as standard accessories
Bushing	Cable type varies depending on communication method (Cable bushing optional)

SENSOR UNIT

Model	ESU	SGU	SSU	NCU
Detection Principle	Electro-chemical cell	Semi-conductor	Pyrolysis-particle	Catalytic combustion
Gas detected and detection range	Refer to list of detectable gases	0-2000ppm H2, CH4, or CH2F2 (R-32) in air and others	0-15ppm TEOS in air	0-100% LEL H2, CH4, and others
Self diagnosis function	Sensor trouble, system failure
Date logging function	Event history, alarm history, calibration history, Alarm trend (60 sec. before/after 1st alarm)

PYROLYSER UNIT

Model	PLU-70
Application	NF3 / TEOS gases detected in air
Usage	Used by connecting to “GD-70D” (Main unit)
Power Lamp	LED (Green color) Normal: Light-on Warming-up: Flashing at every 1 sec interval Trouble: Flashing at every 0.2 sec interval
Self-diagnostic function	Pyrolyser unit trouble Fan trouble System trouble
Operating temp. & humidity	0-40° C, 30-70% RH (non-condensing)
Operational settings	All operational settings are user adjustable through front panel.
Power requirements	DC 24V+/- 10%, approx. 25W (max)
Dimensions	2.8”W x 4.7”H x 5.9”D (70W x 120H x 150Dmm)
Weight	Approx. 1.2kg (2.6lbs)
Mounting	Wall-mounting base plate by 2 or 3 screws
Sampling	4x6mm PTFE tubing recommended. Tube fittings provided as standard accessories
Bushing	1.25sq 2 core cable for power supply DC24V (Cable bushing optional)