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Operating Precautions 

 

This detector is a gas detector that detects combustible gases, toxic gases in the air and triggers a gas 
alarm. 
The gas detector is a safety unit, not an analyzer or densitometer which performs quantitative/qualitative 
analysis/measurement for gases. 
Please fully understand the following points before using it, so that it can be used properly.   
 

1.  This detector may be interfered by gases and vapors other than the gas to be detected. 

Please note that the alarm may be triggered by interference. In addition, it may be fluctuated by 
environmental (temperature, humidity, etc.) changes in the installation site. 
Perform zero adjustment regularly (every 1 month). 
 

2.  Do not use the gas detector in a place where the temperature changes drastically (about 10-15

 or 

more). 

 

3.  The alarm must be set within a range where the performance of the detector can be ensured. 

In facilities compliant with the High Pressure Gas Safety Act, an alarm setting below our standard 
alarm setpoint may trigger a false alarm. 

 
4.  This is a safety unit, not a control unit. 

If use in safety unit, the analog signal output of the detector must be used for an indicator or external 
recorder. 
If these outputs are used to control other units, we shall not be responsible for any malfunctions. 

 
5.  Please contact us because a pretreatment device is required for gas sampling from locations with high 

humidity, dust, or acid mist. 

 
6.  For maintenance of the gas detector, it is necessary to perform a regular inspection including 

replacement adjustment of the regular replacement parts described in the operating manual. 

 
 
 
 
 
 

 

 

Содержание SD-1DRI

Страница 1: ...PT2E 2981 Smart transmitter Gas Detector Head SD 1DRI TYPE MED EX Operating Manual PT2E 196...

Страница 2: ...as detector in a place where the temperature changes drastically about 10 15 or more 3 The alarm must be set within a range where the performance of the detector can be ensured In facilities compliant...

Страница 3: ...How to wire 18 4 7 How to tube 22 How to Operate 23 5 1 Preparation for start up 23 5 2 Basic operating procedures 23 5 3 How to start the detector 24 5 4 Modes 25 5 5 Maintenance Mode User 26 5 6 Ho...

Страница 4: ...ses or other reasons leak with the built in gas sensor The concentrations of detected gases are displayed on the seven segment LED The detector outputs gas concentration in 4 20 mA An external pump et...

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Страница 15: ...prevented by installing a lightning arrester before the field devices and central processing equipment For information on how to use a lightning arrester please contact the manufacturer Grounding In...

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Страница 30: ...ull scale is detected the sensor may be contaminated In such a case in order to ensure the reliability of the detector carry out zero calibration and span calibration properly 6 2 Fault alarm activati...

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Страница 33: ...m the zero adjustment after ensuring that no other gases exist around it Alarm Test Inspect the alarm circuit by using the alarm test function Gas Adjustment Perform the sensitivity calibration by usi...

Страница 34: ...ks the activation of the external alarm such as a buzzer Gas Adjustment Performs the sensitivity calibration by using the calibration gas Gas Alarm Check Checks the gas alarm by using the calibration...

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Страница 45: ...adjustment has not been completed Check if the correct concentration span adjustment gas has been provided and check the gas adjustment tool for a gas leak If there are mistakes perform the span adjus...

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Страница 47: ...3 8 years 1 After replacements having need of operation check by professional service engineers To maintain the safety operation of the detector please use our maintenance service Request RIKEN KEIKI...

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Страница 49: ...detector If such a symptom is observed frequently take appropriate measures to eliminate the noise Sensor abnormalities E 1 The sensor is not connected or improperly connected Check if the sensor cab...

Страница 50: ...ent When the environment temperature etc changes suddenly the detector cannot adjust to it and is affected by it In some cases the detector triggers an indication alarm Because the detector cannot be...

Страница 51: ...alog transmission in common with power supply power supply signal common or Two wire analog transmission digital transmission HART communication Transmission specification 4 20mADC linear load resista...

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Страница 55: ...ower explosive limit LEL of the combustible gas to be detected is set to 100 vol A unit used to express the percentage of a specific substance or gas in a volume of solution Calibration Adjusts the re...

Страница 56: ...Revision Date issued 0 First edition 11 10 2020 1 P9 Safety information Declaration of Conformity P53 Added CH4 0 100vol to the list of gases to be detected MED specification P55 Added vol to the defi...

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