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11 Definition of Terms

 

 

 

 

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11 

Definition of Terms 

 
 
 
 
Catalytic 
combustion type 

This is a principle of the sensor installed in the TYPE GP H.   
See "10-2. Detection principle" for details.   

New ceramic 

This is a principle of the sensor installed in the TYPE NC H.   
See "10-2. Detection principle" for details.   

Initial clear 

Output from the detector head fluctuates for a while after turning on the power.   
This is a function to prevent triggering alarm during that time. 

Full scale 

Maximum value of the detection range. 

%LEL 

A unit which the lower explosive limit (LEL) of the combustible gas to be detected is set 
to 100. 

ppm 

A concentration unit that means part per million of the combustible gas to be detected. 

Calibration 

Adjusts the readings to the calibration gas concentration value by using the calibration 
gas. 

Zero suppression 

A function to cut off the specific drifting that the sensor has. 

Alarm delay time 

A function which temporarily suspends activation to prevent a false alarm caused by 
noise from its outside. 

INHIBIT 

The gas detection function is temporarily suspended during maintenance etc. of the 
detector. 
This is also called "point skip", which has the same function. 

HART 
communication 

DC4-20mA signal digitals signalling is superimposed, and is methods that transmit 
multiple signals. 

 
 
 

Summary of Contents for SD-1D-AS

Page 1: ...PT2E 2894 Smart Transmitter Gas Detector Head SD 1D AS TYPE GP H TYPE NC H Operating Manual PT2E 161 PT2 161...

Page 2: ...an alarm setting below our standard alarm setpoint may trigger a false alarm 3 If use in safety unit the analog signal output of the detector must be used for an indicator or external recorder If the...

Page 3: ...Operate 26 5 1 Preparation for start up 26 5 2 Basic operating procedures 27 5 3 How to start the detector 28 5 4 Modes 29 5 5 Maintenance mode User 30 5 6 Flow Rate Adjustment 33 5 7 How to exit 33 6...

Page 4: ...he alarm activation when the gas concentration is over the setting value This detector is a safety unit not an analyzer or densitometer which performs quantitative qualitative analysis measurement for...

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Page 11: ...ct Components 3 1 Main unit and standard accessories 9 3 Product Components 3 1 Main unit and standard accessories Main Unit including a cable gland or an adapter ATEX IECEx Specification TIIS Specifi...

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Page 14: ...switch menus or change a value DOWN 5 Power lamp Power lamp Detection mode It lights up in green Maintenance mode It blinks in green 6 Alarm lamp Alarm lamp It lights up in red when the alarm setpoin...

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Page 19: ...ning is impossible the following protective measures can be taken Protection against lightning Take appropriate measures in accordance with the importance of the facilities and the environment Provide...

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Page 28: ...ector Connect the detector to a grounding circuit Check that the wiring is connected to external device properly Check that the power supply voltage is compliant with the specifications Check that the...

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Page 36: ...ay Operation Gas Concentration Display In case of over the detection range Over Scale is displayed on the LED Power Indicator Lamp POWER Green During operation this lights up continuously Alarm Indica...

Page 37: ...d Access the gas leak point equipped with a protective gear to avoid dangers caused by possibly remaining gases and check whether gases remain or not by using a portable gas detector Check that the po...

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Page 40: ...ntain the performance as a safety unit Maintenance item Maintenance content Daily mainte nance Monthly mainte nance Regular mainte nance Power supply check Check that the power lamp lights up Concentr...

Page 41: ...ow rate by using an external flow meter to verify the correctness of the flow rate indicator on the detector If the flow rate is incorrect performs the flow rate adjustment Filter check Checks the dus...

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Page 44: ...ous Electrical Settings Display Display various electrical settings This is not used by the user 2 6 Enter the factory mode This is not used by the user 2 7 Return to the user mode rET is displayed Pr...

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Page 57: ...nsulation transformer Cable abnormalities open circuit not connected short circuit Check the wiring of detector and related devices around it Abnormal operations Disturbances by sudden surge noise etc...

Page 58: ...mpletely For information on actions such as removal filter please contact RIKEN KEIKI Disturbance by noise Turn off and restart the detector If such a symptom is observed frequently take appropriate m...

Page 59: ...gas than alarm setpoint value without piping delay time Gas alarm type Single alarm H Gas alarm display ALM lamp lighting red Gas alarm pattern Auto recover Fault alarm self diagnosis System failure...

Page 60: ...n rapidly vary Operating humidities Below 95 RH non condensing Structure Wall mounting sampling unit Cu Specification or SUS Specification Explosion protected construction Flame proof structure Explos...

Page 61: ...ystem Two wire analog transmission digital transmission HART communication or Three wire analog transmission in common with power supply power supply signal common Transmission specifications 4 20 mA...

Page 62: ...10 Product Specifications 10 1 List of specifications 60 Outline Drawings SD 1D...

Page 63: ...ion system Two wire analog transmission digital transmission HART communication or Three wire analog transmission in common with power supply power supply signal common Transmission specifications 4 2...

Page 64: ...Auto recover Transmission system Two wire analog transmission digital transmission HART communication or Three wire analog transmission in common with power supply power supply signal common Transmis...

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Page 66: ...element with a mixture of gas inert alumina and glass sintered on it When a combustible gas comes into contact with the surface of the detecting element with new ceramic oxidation catalyst sintered on...

Page 67: ...mit LEL of the combustible gas to be detected is set to 100 ppm A concentration unit that means part per million of the combustible gas to be detected Calibration Adjusts the readings to the calibrati...

Page 68: ...details Issue date 0 First issue 10 4 2019 1 Declaration of Conformity 12 23 2019 2 Declaration of Conformity 4 1 2020 3 Safety information Declaration of Conformity 8 1 2020 4 Safety information Decl...

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