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7 Maintenance

 

 

7-1. Maintenance intervals and items 

 

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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.) 

Concentration 
Display Check 

:  Verifies that the concentration display value is zero (or 20.9 vol% on the oxygen deficiency 

meter) by using the zero gas. 
Performs the zero adjustment (fresh 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. (Checks ALM1 activation.) 

 

Checks the external alarm. (Checks the activation of the external alarm, such as a 
buzzer.) 

Span 
Adjustment 

:  Performs the span adjustment by using the calibration gas. 

Gas Alarm 
Check 

:  Checks the gas alarm by using the calibration gas. 

 

Checks the alarm. (Checks triggering of alarm when the alarm setpoint is reached.) 

 

Checks the delay time. (Checks time to delay until the alarm is triggered.) 

 

Checks the alarm lamps. (Checks ALM1 activation.) 

 

Checks the external alarm. (Checks the activation of external alarms, such as a 
buzzer and reset signal.) 

Cleaning and 
Repair of 
Device 
(Visual 
Diagnosis) 

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

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

Device 
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. 

 
 

Содержание PT2-178

Страница 1: ...PT2E 2464 Smart Transmitter Gas Detector Head SD 1DEC AS Operating Manual PT2E 178 PT2 178...

Страница 2: ...reshold limit value 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 analog signal...

Страница 3: ...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 Adjust...

Страница 4: ...he setting value The detector is a safety unit not an analyzer or densitometer which performs quantitative qualitative analysis measurement for gases Please fully understand the features of the detect...

Страница 5: ...some specification depends on standard and explosion proof certificate Please confirm the detector specification before using Please refer Declaration of Conformity that is at the end of this manual...

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Страница 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...

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Страница 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...

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Страница 35: ...ncentration 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 Th...

Страница 36: ...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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Страница 39: ...eading is incorrect perform the zero 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 f...

Страница 40: ...ty or clogged dust filter Alarm Test Inspects the alarm circuit by using the alarm test function Checks the alarm lamps Checks ALM1 activation Checks the external alarm Checks the activation of the ex...

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Страница 54: ...rn off and restart the indicator alarm unit 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...

Страница 55: ...mpletely 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 envi...

Страница 56: ...gnosis System failure Sensor failure Trouble alarm indication FAULT lamp lighting yellow content display Trouble alarm action Auto recover Alarm contact No voltage contact 1a Non exciting at normal ex...

Страница 57: ...tructure Explosion proof grade 2G Ex db C T6 Gb ATEX Ex db C T6 Gb IECEx Outer dimension Approx 400 W 265 H 102 D mm Weight Approx 5 9kg Color Munsell 7 5BG5 2 When a half union for gas IN side is cha...

Страница 58: ...oltage contact 1a Non exciting at normal exciting at alarm or exciting at normal non exciting at alarm Contact capacity 250VAC 0 5A 30VDC 0 5A resistive load Transmission scheme Three wire analog tran...

Страница 59: ...10 Product Specifications 10 1 List of specifications 57 Outline Drawings...

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Страница 61: ...ction range 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 calibrat...

Страница 62: ...details Issue date 0 First issue 2 20 2017 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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