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7 Maintenance

 

7-1. Maintenance intervals and items 

 

- 36 - 

 

Main Services 
 

Power Supply 
Check 

:  Checks the power supply voltage. 

Verifies that the power lamp lights up. 
(Verifies that relevant points can be identified on the system.) 
(When a UPS (uninterruptible power system) is used, checks the operation with the UPS 
(uninterruptible power system).) 

Concentration 
Display Check 

:  Verifies that the concentration display value is zero by using the zero gas. 

Performs the zero adjustment (AIR adjustment) if the reading is incorrect. 

Flow Rate Check  :  Checks the flow rate indicator to find abnormalities. 

Checks the flow rate by using an external flow meter to verify the correctness of the flow rate 
indicator on the gas detector. If the flow rate is incorrect, performs the flow rate adjustment. 

Filter Check 

:  Checks the dust filter for dust or clogging. 

Replaces a dirty or clogged dust filter. 

Alarm Test 

:  Inspects the alarm circuit by using the alarm test function. 

•  Checks the alarm lamps. (Check each activation of ALM.) 
•  Checks the external alarm. (Checks the activation of the external alarm, such as a buzzer.) 

Span 
Adjustment 

:  Performs the sensitivity calibration by using the calibration gas. 

Gas Alarm 
Check 

:  Checks the gas alarm by using the calibration gas. 

•  Checks the alarm. (Checks the alarm activation when the alarm setpoint is reached.) 
•  Checks the delay time. (Checks time to delay until the alarm is triggered.) 
•  Checks the alarm lamps. (Check each activation of ALM.) 
•  Checks the external alarm. (Check the activation of external alarms, such as a buzzer and 

reset signal.) 

Cleaning and 
Repair of the 
Detector 
(visual 
diagnosis) 

:  Checks dust or damage on surface, cover, or internal parts of the detector, clean and repair 

such parts of the detector. 
Replaces parts which are cracked or damaged. 

Detector 
Operation 
Check 

:  Uses the keys to check the operation of functions and parameters. 

Replacement of 
Consumable 
Parts 

:  Replaces consumable parts, such as a sensor, filter and pump. 

 
 

 

Summary of Contents for SD-1DRI-AS

Page 1: ...PT2E 2117 Smart transmitter Gas Detector Head SD 1DRI AS Operating Manual PT2E 196 PT2 196 ...

Page 2: ... 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 3 This is a safety unit not a control unit The alarm contact output of the detector must be used for an external alarm lamp buzzer while the alarm signal output must be used for an indicator or external reco...

Page 3: ...8 4 6 How to tube 23 5 How to Operate 24 5 1 Preparation for start up 24 5 2 Basic operating procedures 24 5 3 How to start the detector 25 5 4 Modes 26 5 5 User mode 27 5 6 Flow Rate Adjustment 30 5 7 How to exit 30 6 Operations and Functions 31 6 1 Gas alarm activation 31 6 2 Fault alarm activation 32 6 3 External output operation 33 6 4 Other functions 34 7 Maintenance 35 7 1 Maintenance interv...

Page 4: ...s such as examples of LED display 1 2 Purpose of use The detector is a fixed type gas detector head that detects leak of combustible gases toxic gases and that performs the 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 gases Please fully understand...

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Page 13: ...compressed air 8 Compressed air inlet An inlet for compressed air 1 MENU ESC key Used to enter the maintenance mode It is also used to cancel in a specific mode 2 SET key It is used for value confirmation and so on in a specific mode 3 key Used to switch menus or change a value UP 4 key Used to switch menus or change a value DOWN 5 Power lamp Power lamp Detection mode It lights up in green Mainten...

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Page 21: ...Φ14 0 When the four hexagon socket head bolts of the gas detector head SD 1DRI are loosened and the lid is opened the following terminal plate appears Grounding terminals are provided one inside and the other one outside Figure of Terminal Plate 24 VDC DC 1 Common 2 4 20 mA Sig 3 Contact 4 Contact 5 Specifications of Terminal Plate Specifications of terminal plate Rated voltage 250 VAC Rated curre...

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Page 33: ...ration 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 Indicator Lamp ALM Red It lights up when the alarm setpoint value is reached to or exceeded Contact Activation The contact is activated when the gas concentration reaches or exceeds the alarm setpoint value only when the alarm is ...

Page 34: ... check that the gas concentration reading dropped Equipped with a protective gear to avoid dangers caused by possibly remaining gases before accessing the gas leak point and then check that gases remain by using a portable gas detector Determine that the point is free from dangers and take actions to fix the gas leak 6 2 Fault alarm activation A fault alarm is triggered when the detector detects a...

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Page 37: ...m the zero adjustment after ensuring that no other gases exist around it Flow rate check Check the flow rate to find abnormalities Filter check Check the dust filter for dust or clogging Alarm Test Inspect the alarm circuit by using the alarm test function Span Adjustment Perform the sensitivity calibration by using the calibration gas Gas Alarm Check Check the gas alarm by using the calibration g...

Page 38: ...ter Alarm Test Inspects the alarm circuit by using the alarm test function Checks the alarm lamps Check each activation of ALM Checks the external alarm Checks the activation of the external alarm such as a buzzer Span Adjustment Performs the sensitivity calibration by using the calibration gas Gas Alarm Check Checks the gas alarm by using the calibration gas Checks the alarm Checks the alarm acti...

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Page 49: ...commended regular replacement parts No Item Maintenance intervals Replacement intervals year Quantity pieces unit Remarks 1 Guard assembly 6 months 3 8 years 1 2 Aspirator cap 6 months 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 for it NOTE The...

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Page 51: ...additional measures 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 Turn off and restart the 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 ...

Page 52: ...pletely 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 measures to eliminate the noise Sudden change in the environment When the environment temperature etc changes suddenly the detector cannot adjust to it and is affected by it In some cases the detector t...

Page 53: ...ellow detail display Fault alarm pattern Non latching auto reset Alarm contact No voltage contact 1a de energized energized in response to an alarm or energized de energized in response to an alarm Contact capacity 250 VAC 0 5 A 30 VDC 0 5 A resistance load Transmission system 3 wire type analog transmission common cable for power and signal power signal common Transmission specifications 4 20 mA ...

Page 54: ...10 Product Specifications 10 1 List of specifications 52 Outline Drawings Cable gland G3 4 Adapter A NPT1 2 ...

Page 55: ...10 Product Specifications 10 1 List of specifications 53 Outline Drawings Adapter B NPT3 4 ...

Page 56: ...amp on yellow detail display Fault alarm pattern Non latching auto reset Alarm contact No voltage contact 1a de energized energized in response to an alarm or energized de energized in response to an alarm Contact capacity 250 VAC 0 5 A 30 VDC 0 5 A resistance load Transmission system 3 wire type analog transmission common cable for power and signal power signal common Transmission specifications ...

Page 57: ...10 Product Specifications 10 1 List of specifications 55 Outline Drawings ...

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Page 59: ...ection range LEL A unit which the lower explosive limit LEL of the combustible gas to be detected is set to 100 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 n...

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