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9 Troubleshooting

- 46 -

<Abnormalities of Readings>

Symptoms

Causes

Actions

The reading rises (drops)
and it remains so.

Drifting of sensor
output

Perform the zero adjustment (or span adjustment).

Slow leak

A very small amount of the gas to be detected may be
leaking (slow leak). Because ignoring it may cause
dangers, take a remedial measure, i.e., taking actions the
same as those for the gas alarm.

Environmental
changes

Perform the zero adjustment (or span adjustment).

A gas alarm is triggered
despite of no gas leak
and no other
abnormalities at the
detection point.

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 triggers an indication alarm.
Because the detector cannot be used under sudden and
frequent environmental changes, any preventive actions
to eliminate them should be taken by the user.

Slow response

Deteriorated sensor
sensitivity

Replace the sensor with a new one.

Span adjustment
impossible

Improper calibration
gas concentration

Use the proper calibration gas.

Deteriorated sensor
sensitivity

Replace the sensor with a new one.

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Содержание PT2-177

Страница 1: ...PT2E 1771 Smart Transmitter Gas Detector Head SD 1OX Operating Manual PT2E 177 PT2 177 ...

Страница 2: ...n 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 standard alarm setpoint value is 18 vol 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 ou...

Страница 3: ......

Страница 4: ... for start up 21 5 2 Basic operating procedures 21 5 3 How to start the gas detector 22 5 4 Modes 23 5 5 User mode 24 5 6 How to exit 26 6 Operations and Functions 27 6 1 Gas alarm activation 27 6 2 Fault alarm activation 28 6 3 External output operation 29 6 4 Other functions 30 7 Maintenance 31 7 1 Maintenance intervals and items 31 7 2 Regular maintenance mode 33 7 3 Calibration method 40 7 4 R...

Страница 5: ...a safety unit not an analyzer or densitometer which performs quantitative qualitative analysis measurement for gases Please fully understand the features of the detector before using it so that it can be used properly The detector detects abnormalities in the air caused by presence of gases or other reasons leak with the built in gas sensor The concentrations of detected gases are displayed on the...

Страница 6: ...ated due to damages The explosion protection condition for the detector is low 2J possibility of mechanical damage Ambient temperature ATEX IECEx Specifications 20 to 60 C TIIS Specifications 20 to 53 C The ambient temperature on explosion proof certification is described above and it indicates the temperature range which can maintain the explosion proof performance and not the product performance...

Страница 7: ...onnect it to a protective grounding circuit Span adjustment in atmosphere When the span adjustment is performed in the atmosphere check the atmosphere for freshness before beginning the adjustment If interference gases exist the adjustment cannot be performed properly thus leading to dangers when the oxygen concentration fluctuates Response to gas alarm Issuance of a gas alarm indicates that there...

Страница 8: ...t disassemble modify the detector or change the settings if not necessary Disassembling modifying the detector will invalidate the warranty of the performance Changing the settings without understanding the specifications may cause alarm malfunctions Please use the detector properly in accordance with the operating manual Avoid applying organic solvents and others to the window plate for a long ti...

Страница 9: ...DEKRA 13ATEX0035 X Group II Category 2G Type of Protection and Marking code Ex d IIC T6 Equipment Protection Level Gb Ambient Temperature 20 C to 60 C Electrical Data Supply voltage DC24 V 45mA Output signal 4 to 20 mA DC24V 22mA Relay Contact output DC30V or AC250V 0 5A Applicable Standard IEC 60079 0 2011 IEC 60079 1 2007 EN 60079 0 2012 EN 60079 1 2007 Manual Number PT2E 177 The ambient tempera...

Страница 10: ...tact output Contact capacity AC250V 0 5A Load resistance DC30V 0 5A Load resistance Applicable Standard JNIOSH TR NO 43 2008 The ambient temperature on explosion proof certification is described above and it indicates the temperature range which can maintain the explosion proof performance and not the product performance see 10 1 List of specifications for details Installation GND Sig RLY GND Sig ...

Страница 11: ...for the wiring Dedicated control key CAUTION Use the supplied dedicated control key to operate the detector If products other than these accessories are used key operations cannot be accepted properly Note that the control key is made of extremely strong magnet Putting it close to a magnetic product such as a credit card and ID card may damage the stored data Display for power supply signal Sensor...

Страница 12: ...ched 7 Fault lamp Fault lamp It lights up in yellow when an abnormality is detected in the detector 8 Concentration value display Display the gas concentration and so on NOTE The nameplate on the front side of the detector see the figure on the right shows the precautions to be taken for explosion proof performances Read these precautions as well as 2 Important Notices on Safety The detector manuf...

Страница 13: ...m contact ALARM or 2 Fault contact FAULT or 3 Select either gas alarm or contact ALARM FAULT Contact activation De energized De energized at a normal state ON ALARM Closed contact at an alarm state Alarm contact controller Display POWER ALARM FAULT Seven segment LED four digit Magnetic operation part MENU ESC SET Transmitter 4 20 mA transmission ...

Страница 14: ... TIIS Specifications 10 to 40 C Do not install the detector in a place exposed to direct sunlight or sudden changes in the temperature When selecting installation points avoid a place where it is exposed to direct sunlight or radiant heat infrared rays emitted from a high temperature object and where the temperature changes suddenly Condensation may be formed inside the detector or the detector ca...

Страница 15: ...owed time of momentary blackout Up to 10 milliseconds To recover from the momentary blackout for 10 milliseconds or more restart the detector Example of actions To ensure continuous operation and activation install a UPS outside the detector Others Do not use it with a power supply of large power load or high frequency noise Example of actions Use a line filter to avoid the noise source if necessa...

Страница 16: ...asily because counter electromotive force is generated at the contact Deposition defective insulation or defective contact at the relay contact Damage of any electric parts due to high voltage generated inside the detector Abnormal operations by an out of control CPU If load is to be activated appropriate measures must be taken to stabilize the operation of the detector and protect the alarm conta...

Страница 17: ...ot install the detector in a place where maintenance of the detector cannot be performed or where handling the detector involves dangers Regular maintenance of the detector must be performed Do not install the detector in a place where the machinery must be stopped when maintenance is performed in its inside where parts of the machinery must be removed to perform maintenance or where the detector ...

Страница 18: ...avier than the air CO2 etc install the detector in consideration for the specific gravity of the gas Do not install the detector in a damp place where condensation occurs Water drops formed on the sensor may cause abnormal detection CAUTION Be careful not to damage the internal electronic circuit when wiring In addition be careful not to apply stresses on the detector when overweight cables are in...

Страница 19: ...8 From Φ11 5 to less than Φ12 5 Φ13 Φ14 Φ12 8 From Φ12 5 to less than Φ13 0 Φ13 5 Φ14 Φ13 8 NOTE The following table shows an example of overall outer diameters of cables Use them for reference The overall outer diameters must be checked because they somewhat vary between manufacturers Number of core CVV 1 25 sq CVV 2 sq CVVS 1 25 sq CVVS 2 sq 2 ø9 5 ø10 5 ø10 0 ø11 0 3 ø10 0 ø11 0 ø10 5 ø11 5 4 ø...

Страница 20: ... 5 mm Grounding terminal CAUTION The specified bare wire length must be observed when the wire insulation is peeled off Improper clamping of the wire due to a shorter bare wire length may cause defective electric conduction or heating Catching the wire insulation due to a shorter bare wire length may cause defective electric conduction or heating Exposing the wire due to a longer bare wire length ...

Страница 21: ...bar terminal of the specified model must be used Using other bar terminals invalidates the warranty of the performance CAUTION The right tools must be used In principle one wire can be connected to one wiring hole When the wire is inserted into the driver slot by mistake it does not contact the conductive part This may cause defective electric conduction or heating When the wire is inserted under ...

Страница 22: ...then connect the cable into the main unit then screw the cable gland to tighten the rubber seal Cable gland Sensor part Main unit case CAUTION Ensure the tightening torque for the cable gland and seal plug to be 40 N m or larger If it is difficult to tighten the cable gland grease its screw part and then tighten it with the tool Cable Gland Eccentric washer Washer Rubber seal Main unit case ...

Страница 23: ...detector and safety it must be connected to a grounding terminal Do not connect the grounding wire to a gas pipe The grounding must be made as D type grounding below 100 Ω of grounding resistance For the grounding wire use cable lugs to safely connect it to a grounding terminal without looseness or twist Use ring terminals to connect the grounding terminal with the ground and use the grounding wir...

Страница 24: ...operly Check that the power supply voltage is compliant with the specifications Because the external contact may be activated during the adjustment take measures to prevent an activated contact from having influences on external device 5 2 Basic operating procedures Normally the detection mode is used for normal operations The detection mode is activated after the power is turned on The detector i...

Страница 25: ... deactivation Power on Initial clear approximately 25 seconds Detection mode WARNING When the detector enters other mode from the detection mode while an alarm is activated the alarm is reset CAUTION Do not turn off the detector during the initial clear The detector is reading the internal memory during the initial clear If the detector is installed newly or the new sensor is replaced the sensor m...

Страница 26: ...2 3 Initialize zero span values Environmental Setting 2 4 Used for various environmental settings 2 4 0 Sensor Power Supply ON OFF 2 4 1 INHIBIT Setting 2 4 2 Alarm Setpoint Setting 2 4 3 Alarm Delay Time Setting 2 4 4 Alarm Pattern Setting 2 4 5 Suppression Type Setting 2 4 6 Suppression Value Setting 2 4 7 Alarm Contact Specification Setting 2 4 8 Energized De energized Contact Setting 2 4 9 2 4...

Страница 27: ... detection mode in ten hours Detection Mode Press the MENU ESC key for three seconds User Mode 1 0 ROM SUM Display Display the program version and others This is not typically used by the user 1 1 Span Adjustment Perform the span adjustment 1 2 Various Setting Display Display various setting values 1 3 Mode Switching Switch to the maintenance mode Span Adjustment P23 Setting Display P24 See Regula...

Страница 28: ...splayed In this case the span adjustment has not been completed 1 1 Press SET key Current Concentration Value Display Press the SET key to perform the zero adjustment Under Span Adjustment CAL is displayed Wait for a while until the adjustment is completed Span Adjustment Completed It automatically returns to 1 1 after PASS is displayed If the zero adjustment failed it automatically returns to 1 1...

Страница 29: ...m FAU The contact is activated due to the fault alarm A or F The contact is activated due to the gas alarm or the fault alarm WARNING When the detector is turned off an alarm may be triggered on the upper central system Before turning off the detector INHIBIT point skip on the upper central system must be activated Decide whether the power can be turned off by checking the operation of the devices...

Страница 30: ...en 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 Indicator Lamp ALM Red This lights up when the alarm setpoint value is reached or exceeded Contact Activation The contact is activated when the oxygen concentration reaches or exceeds the alarm setpoint value only when t...

Страница 31: ...ccess 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 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 abnormalities After a fault alarm is triggered the fault lamp...

Страница 32: ... Output ON setting 4 20 mA concentration output Output OFF setting The previous value retained 6 Fault Alarm 0 5 mA Fixed 7 INHIBIT Depending on the setting of section 4 2 5 mA setting 2 5 mA 4 mA HOLD 4 20 mA setting Equivalent to AIR value 17 4 mA 8 Power Off 0 mA Example of Gas Concentration and External Output 0 25 vol Oxygen deficiency alarm specification Detection mode Maintenance mode Suppr...

Страница 33: ...e suppress the fluctuation of the reading under the setting value indicating 20 9 vol NOTE The suppression function is factory set The standard setting value is 0 5 vol for 20 9 vol In the maintenance mode this function is disabled and the fluctuation of the reading under the setting value is displayed Example Suppression Disabled A fluctuation around zero is displayed as the reading Suppression E...

Страница 34: ... 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 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 Ab...

Страница 35: ...rty 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 trigg...

Страница 36: ...e Setting 2 4 7 Alarm Contact Specification Setting 2 4 8 Energized De energized Contact Setting 2 4 9 2 4 A Maintenance Mode External Output Setting 2 4 B External Output Adjustment 2 4 C Alarm Test External Output Setting 2 4 D Sensor Operation Start Setting 2 4 E Password Setting 2 4 F Sensor Fault Alarm Pattern Setting Display 2 5 Display various electrical settings This is not typically used ...

Страница 37: ...ng Set various operations and functions 2 4 0 and 2 4 3 to 2 4 F are factory set They are not typically used by the user 2 5 Various 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 Zero Adjustment P38 Span Adjustment P40 Environmental Setting P37 rET is displayed Press t...

Страница 38: ...he related sections so that they can prepare for false abnormalities external output signals and alarm contact After the test is completed never fail to press MENU ESC key to return to the detection mode If the detector remains in the alarm test mode it automatically returns to the detection mode in ten hours In the alarm test mode the gas concentration equal to the reading is output even in the m...

Страница 39: ...tion output can be activated by a gas test even in the maintenance mode depending on setting 2 0 1 Press SET key Alarm Test ON OFF The contact setting is Alarm or Alarm or Fault Select either ON OFF and then press the SET key Perform the gas alarm test by increasing or decreasing the reading with the or key Press the MENU ESC key to cancel the test and to go back to the original state To 2 0 1 WAR...

Страница 40: ...back to the original state 2 0 3 Press SET key LED Test ON OFF Select either ON OFF Switch ON and press the SET key to turn on the LEDs POWER ALM FAULT and to display the gas concentration of 8 8 8 8 Return to OFF and press the SET key to cancel the test Pressing the MENU ESC key also enables to cancel the test and to go back to the original state WARNING Be careful to perform the test because the...

Страница 41: ...the RAM fault and F RO is displayed for the ROM fault For both the RAM fault and ROM fault F RA and F RO are displayed alternately 2 0 4 Press SET key When StA is displayed press the SET key again When CAL is displayed the memory diagnosis is performed When memory is correct as a result of the diagnosis PASS is displayed Press the SET key to go back to the original state To 2 0 4 ...

Страница 42: ... SET key to confirm the selection When ON is selected in the detection mode InHI and 0 0 gas concentration value are displayed on the LED alternately As a result an alarm is not triggered to external device 2 4 2 Alarm Setpoint Setting Set the alarm setpoint 2 4 3 to 2 4 F They are factory set and not typically used by the user Alarm Setpoint Setting P37 To 2 4 0 2 4 2 Press SET key Alarm Setpoint...

Страница 43: ...ot required NOTE Before starting the zero adjustment provide the detector with the zero adjustment gas and wait until the indicator is stabilized 2 1 Press SET key Current Concentration Value Display Press the SET key to perform the zero adjustment Under Zero Adjustment CAL is displayed Wait for a while until the adjustment is completed Zero Adjustment Completed It automatically returns to 2 1 aft...

Страница 44: ...ompleted Span Adjustment 2 2 This is used to perform the span adjustment CAUTION Before starting the span adjustment provide the detector with the calibration gas and wait until the reading is stabilized WARNING When the span adjustment is performed in the atmosphere check the atmosphere for freshness before beginning the adjustment If interference gases exist the adjustment cannot be performed pr...

Страница 45: ...ot be performed even when there is no mistake or after recalibration the gas sensor life might have expired After turning off the power supply please contact RIKEN KEIKI 2 2 Press SET key Return to 2 2 Gas Introduction Introduce a gas and then press the SET key when the reading is stabilized In case of less than 10 F S this cannot be set Span Adjustment Because the reading will be fixed adjust the...

Страница 46: ...ame Maintenance intervals Replacement intervals year Quantity pieces unit 1 Slip ring 6 months 3 8 years 1 The operation must be checked after replacement by a qualified service engineer For the stable operation of the unit and safety ask a qualified service engineer to take care of replacement of the parts that operation must be checked Request RIKEN KEIKI for operation check NOTE The above repla...

Страница 47: ...2 Procedures to relocate the detector or use it again When the detector is relocated select a new place in accordance with 4 2 Precautions for installation sites and 4 4 How to install For information on wiring see 4 5 How to wire The unpowered time must be minimized when the detector is relocated 8 3 Disposal of products When the detector is disposed of it must be treated properly as an industria...

Страница 48: ...ovide 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 wiring of detector and related devices around it Abnormal operations Disturbances by sudden surge noise etc Turn off and restart the indicator alarm unit If such a symptom is observed frequently take appr...

Страница 49: ... point 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 triggers an indication alarm Because the detector cannot be used under sudden a...

Страница 50: ...cation FAULT lamp lighting yellow content display Trouble alarm action Auto recover Alarm contact No voltage contact 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 Three wire analog transmission in common with power supply power supply signal common Specification of Transmission DC4 ...

Страница 51: ...duct Specifications 10 1 List of specifications 48 Outer dimension Approx 148 W 208 H 88 D mm projection excluding Weight Approx 2 5kg Color Munsell 7 5BG5 2 Outline Drawings Cable gland G3 4 Adapter A NPT1 2 ...

Страница 52: ... recover Trouble alarm Self diagnosis 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 exciting at alarm or exciting at normal non exciting at alarm Contact capacity AC250V 0 5A DC30V 0 5A resistive load Transmission scheme Three wire analog transmission in ...

Страница 53: ...ations such as leak alarm specifications please contact RIKEN KEIKI 10 2 List of 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 units One 11 to 20 units Two 21 to 50 units Three Over 51 units Four ...

Страница 54: ...trolyte A part of the container is opened and covered with a barrier The negative electrode is installed in contact with the barrier Lead wires are drawn from the positive and negative electrodes to obtain outputs A thermistor is connected between the lead wires to perform temperature compensation for the sensor outputs Barrier Electrolyte Container Lead wire Thermistor Output Positive electrode N...

Страница 55: ...e 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 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 te...

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