background image

7 Maintenance

 

 

7-1. Maintenance intervals and items 

 

 

- 37 - 

 

 
 
 
 
 

Maintenance 

 
 
 
 
The gas detector is an important instrument for the purpose of safety. 
To maintain the performance of the gas detector and improve the reliability of safety, perform a regular 
maintenance.  
 
 
 

7-1. Maintenance intervals and items 

 

 

Daily maintenance: Perform maintenance before beginning to work. 

 

Monthly maintenance: Perform maintenance on the alarm circuit (alarm test) once a month. 

 

Regular maintenance: Perform maintenance once or more for every six months to maintain 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. 

 

 

 

Concentration 
Display Check 

Check that the concentration display value is zero (or 
20.9 vol% on the oxygen meter). When the reading is 
incorrect, perform the zero adjustment (or span 
adjustment) after ensuring that no interference 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 span adjustment by using the calibration 
gas. 

 

 

 

Gas Alarm 
Check 

Check the gas alarm by using the calibration gas. 

 

 

 

 
 

 

Summary of Contents for SD-1DOX-AS

Page 1: ...PT2E 2625 Smart Transmitter Gas Detector Head SD 1DOX AS TYPE H Operating Manual PT2E 179 PT2 179...

Page 2: ...addition it may be fluctuated by environmental temperature humidity etc changes in the installation site 2 The alarm must be set within a range where the performance of the detector can be ensured The...

Page 3: ...o wire 21 4 7 How to tube 25 5 How to Operate 26 5 1 Preparation for start up 26 5 2 Basic operating procedures 26 5 3 How to start the gas detector 27 5 4 Modes 28 5 5 User mode 29 5 6 Flow Rate Adju...

Page 4: ...s concentration is over the setting value The detector is a safety unit not an analyzer or densitometer which performs quantitative qualitative analysis measurement for gases Please fully understand t...

Page 5: ......

Page 6: ......

Page 7: ......

Page 8: ......

Page 9: ......

Page 10: ......

Page 11: ...standard accessories Main Unit Standard Accessories Operating manual one Dedicated handling lever one Dedicated control key The supplied quantity depends on the number of units to be delivered 1 to 10...

Page 12: ......

Page 13: ......

Page 14: ...o 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 setpoi...

Page 15: ......

Page 16: ......

Page 17: ......

Page 18: ......

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...

Page 20: ......

Page 21: ......

Page 22: ......

Page 23: ......

Page 24: ......

Page 25: ......

Page 26: ......

Page 27: ......

Page 28: ......

Page 29: ......

Page 30: ......

Page 31: ......

Page 32: ......

Page 33: ......

Page 34: ......

Page 35: ...d if not needed Display Operation Oxygen 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 c...

Page 36: ...cess 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 point...

Page 37: ......

Page 38: ......

Page 39: ...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 Concentration Display Check C...

Page 40: ...r 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 ra...

Page 41: ......

Page 42: ......

Page 43: ......

Page 44: ......

Page 45: ......

Page 46: ......

Page 47: ......

Page 48: ......

Page 49: ......

Page 50: ......

Page 51: ......

Page 52: ......

Page 53: ......

Page 54: ......

Page 55: ...vide the rated voltage Take measures such as checking or adding the UPS power supply line filter and insulation transformer Cable abnormalities open circuit not connected short circuit Check the wirin...

Page 56: ...ently 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...

Page 57: ...ition Less than 1vol against alarm preset point Alarm delay time 1 under an identical condition By anoxia alarm Alarm preset point 18vol Less than 5sec When introducing 10 11vol gas Without piping del...

Page 58: ...let Bs union for Cu pipe for O D 8 1 Compressed air inlet BS union for Cu pipe for O D 8 1 Initial clear Approx 25sec Operating temperature 10 40 non rapidly vary Operating humidity Less than 95 RH no...

Page 59: ...analog transmission digital transmission HART communication or Three wire analog transmission in common with power supply power supply signal common Specification of Transmission DC4 20mA linear load...

Page 60: ...o wire analog transmission digital transmission HART communication or Three wire analog transmission in common with power supply power supply signal common Specification of Transmission DC4 20mA linea...

Page 61: ...10 Product Specifications 10 1 List of specifications 59 Outline Drawings Adapter A NPT1 2...

Page 62: ...1a Non exciting at normal exciting at alarm or exciting at normal non exciting at alarm Contact capacity AC250V 0 5A DC30V 0 5A resistive load Transmission scheme Two wire analog transmission digital...

Page 63: ...ver Transmission scheme Two wire analog transmission digital transmission HART communication or Three wire analog transmission in common with power supply power supply signal common Specification of T...

Page 64: ...o recover Transmission scheme Two wire analog transmission digital transmission HART communication or Three wire analog transmission in common with power supply power supply signal common Specificatio...

Page 65: ...10 Product Specifications 10 1 List of specifications 63 Outline Drawings Cable gland G3 4...

Page 66: ......

Page 67: ...power This is a function to prevent triggering alarm during that time Full scale Maximum value of the detection range Calibration Adjusts the readings to the calibration gas concentration value by usi...

Page 68: ...0 First issue 3 22 2018 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 Declaration of Conformi...

Page 69: ......

Reviews: