RKI Instruments GD-70D Series Operating Manual

GD-70D Series Operating Manual Part Number: 71-0446 Revision: P1 Released: 7/11/19 Request for the Customers • Read and understand this operating manual before using the detector. • You must operate the detector in accordance with the operating manual. • Regardless of warranty period, we shall not make any compensation for accidents and damage caused by using this product. The compensation shall be made only under the warranty polic ...

GD-70D Request for the Customers ..................................................................................... 1 1 Outline of the Product .................................................................................................... 4 1-1 Preface ............................................................................................................. 4 1-2 Product Purpose ................................................. ...

GD-70D 10-10 Storing the GD-70D ............................................................................. 115 11 Troubleshooting ............................................................................................................. 116 12 Product Specifications ................................................................................................... 119 12-1 Common Specifications .................................................. ...

1 Outline of the Product 1-1 Preface Thank you for choosing our GD-70D Series gas detector head. Please verify that the model number of the product you purchased is included in the specifications on this manual. This manual explains how to use the detector and its specifications. It contains information required for using the detector properly. All users must read and understand the operating manual before using the detector. 1-2 Product Purpo ...

GD-70D 1-3 Definition of DANGER, WARNING, CAUTION and NOTE DANGER This message indicates that improper handling may cause serious damage on life, health or assets. WARNING This message indicates that improper handling may cause serious damage on health or assets. CAUTION This message indicates that improper handling may cause minor damage on health or assets. NOTE This message indicates advice on handling. 1-4 Method of confirmation for CE marking t ...

2 Important Notices on Safety 2-1 Danger Statements DANGER This is not an explosion-proof device. You must not use it to detect gases exceeding the lower limit of explosion. 2-2 Warning Statements WARNING Power Supply Before turning on the detector, always check whether the voltage is properly applied. Do not use an unstable power supply because it may cause malfunctions. Need of groundin ...

- 7 - GD-70D 2-3 Caution Statements CAUTION Do not use a transceiver (walkie-talkie) near the detector. Radio waves from a transceiver near the detector or its cables may disrupt detector operation. When using a transceiver, it must be used in a place where it disturbs nothing. Do not turn the detector on less than 5 seconds after it was turned off. Restarting the detector less than five seconds after turning ...

3 Product Components 3-1 Main Unit and Standard Accessories

GD-70D * This is needed in “pyrolyzer + electrochemical type (ESU)” and “pyrolyzer + pyrolysis-particle type (SSU)”. For more information on the pyrolyzer unit (PLU-70), see the separate operating manual. 3-2 Outline Drawing Pyrolyzer Unit (Unit: mm) M5 mounting hole GAS IN GAS OUT Sensor unit display Operating switch Display Protective cover for power switch Screw for grounding earth rod External wire hole C ...

3-3 Names and Functions for Each Part The detector consists of the following units. Wall-mounted unit Main unit Pump unit Sensor unit  MODE key  TEST/SET key  ▲key  ▼key Lock lever Sensor unit nameplate display window Power lamp First alarm lamp Second alarm lamp Fault lamp ⑪Gas name display ⑫Concentration value display ⑬Unit display ⑭Concentration bar indicator ⑮Alar ...

GD-70D ① MODE key Used to enter User and Maintenance Mode. It is also used to cancel or skip in a specific mode. ② TEST/SET key Used to enter the test mode. It is used for confirmation in a specific mode. ③ ▲ key Used to change screens or change a value (UP). ④ ▼ key Used to change screens or change a value (DOWN). ⑤ Lock lever Lever to lock the main unit. Push it to attach or detach the main unit. ⑥ Sensor unit nameplate display win ...

CAUTION • The sensor unit must be handled carefully to ensure quality. When the sensor unit is stored, a dedicated warehouse and power equipment for the sensor unit are needed. In principal, the sensor unit must not be detached from the detector when it is handled or stored. • Be sure that the sensor unit is installed properly. If a sensor unit is of different specification or principle than the one shipped from the manufacturer, a me ...

GD-70D Electrochemical type (ESU) • Do not disassemble the sensor unit because it contains electrolyte. If contact occurs, rinse the area immediately with a large quantity of water. • The sensor unit identifies the storage direction. Put the sensor unit in the dedicated case while handling it. Do not place it on its side or upside-down. • When a new sensor unit is installed, it must be warmed up. Although warm-up time is different depending on ...

Galvanic cell type (OSU) • Do not disassemble the sensor unit because it contains electrolyte. If contact occurs, rinse the area immediately with a large quantity of water. • The sensor unit must be stored under normal temperature/humidity in a clean place away from direct sunlight. 3-4 Operation Diagrams Sensor unit Controller (CPU) Flow sensor Pump POWER INPUT (24 VDC) Power supply part Gas alarm contact (ALM1, ALM2) ...

CAUTION • This is a precision instrument. Because the detector may not provide the specified performance in some places (environments), check the environment in the installation site, and then take appropriate actions if necessary. • Because the detector plays an important role for safety and disaster prevention, you must install as many units of the detector as needed in appropriate points. • Because gases may leak or collect in di ...

GD-70D Do not install the detector in a place exposed to direct sunlight or sudden changes in the temperature. Avoid installation locations where the detector is exposed to direct sunlight or radiant heat (infrared rays emitted from a high- temperature object), and where the temperature changes suddenly. Condensation may form inside the detector, or the detector cannot adjust to sudden changes in the temperature. Keep the detector (and its cables) a ...

4-3 Precautions for System Designing Using a stable power supply The external output and alarm contact of the detector may be activated when the power is turned on, when momentary blackout occurs, or when the system is being stabilized. In such cases, use a safety power supply, or take appropriate actions on the receiving side. The detector must be provided with the following power supply. Power supply voltage 24 VDC ±10% (the terminal volta ...

GD-70D 4-4 Proper use of alarm contact The alarm contact of the detector is used to transmit signals to activate an external buzzer, alarm lamp or rotating lamp. Do not use the detector for controlling purpose (e.g., controlling the shutdown valve). The specifications for the alarm contact of the detector are based on the resistive load conditions. If inductive load is used at the alarm contact, the following errors will occur easily because counter ...

4-5 Installing the Detector NOTE To use the pyrolyzer unit (PLU-70), also refer to the individual operating manual. CAUTION • Before installing the detector, remove the protective rubber caps from the GAS IN and GAS OUT fittings. If the detector is turned on while the rubber caps are still in place, the pump and sensor may be damaged. Do not forget to remove the caps. Leave space for the cross ...