Riken Keiki GD-A80 Series Скачать руководство пользователя страница 24 | Manualshive

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Riken Keiki GD-A80 Series Скачать руководство пользователя страница 24

6 Maintenance

6-2. Calibration method

- 24 -

6-2. Calibration method

Perform a calibration with the indicator/alarm unit (zero adjustment/span adjustment mode) using the
calibration gas.



Zero adjustment gas



Calibration gas (collected in a gas sampling bag)



Gas sampling bag for exhaust gas

Check and adjustment are performed at the indicator/alarm unit side. See the operating manual of the
indicator/alarm unit for details.

(1) Zero adjustment

Adjust the reading to zero at the indicator/alarm unit side under the condition that no gas is present around
the detection point.
If a gas is present around the detection point, collect fresh air in a gas sampling bag or the like and release it
at the detection point for two minutes or so before starting the zero adjustment.

≪

GD-A80-70

≫

Calibration adapter

Pump

Flow meter

Gas

sampling

bag

Needle valve

Exhaust air

WARNING



When the zero adjustment is performed in the atmosphere, check the atmosphere for
freshness before beginning the adjustment.
If interference gases exist, the calibration cannot be performed properly, thus leading to
dangers when the gas leaks.

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Содержание GD-A80 Series

Страница 1: ...PT2E 1856 Fixed Combustible Gas Detector Head GD A80 Series GD A80 70 Operating Manual...

Страница 2: ...d 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 4 If silicon or...

Страница 3: ...12 4 3 Precautions for system designing 13 4 4 How to install 15 4 5 Installation procedure 16 4 6 How to wire 18 5 How to Operate 5 1 Preparation for start up 21 5 2 How to start the detector 21 5 3...

Страница 4: ...ector is 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 th...

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...

Страница 6: ...rting the detector check the protective functions for defects When seeming defects are found in the protective functions such as protective grounding do not start the detector Zero adjustment in the a...

Страница 7: ...sed in a place where it disturbs nothing Do not disassemble modify the detector Disassembling modifying the detector will invalidate the warranty of the performance Please use the detector properly in...

Страница 8: ...that ensures product performance For the operating temperature see 9 Product Specifications Specific conditions of X mark Regarding ATEX specification the measuring function according to Annex II par...

Страница 9: ...dard JNIOSH TR NO 43 2008 The ambient temperature range that can maintain explosion protection and is not operating temperature range that ensures product performance For the operating temperature see...

Страница 10: ...in unit and standard accessories Main Unit including a cable gland Side view Front view Fixing bracket Cable gland Hexagon socket set screw Hexagon socket head bolt with drop prevention mechanism Exte...

Страница 11: ...1 one Rubber seal ID 13 mm one Washer ID 12 mm 1 one Washer ID 14 mm one Eccentric washer ID 11 8 mm 1 one Eccentric washer ID 12 8 mm one Hex key wrench 2 1 Attached to the suction type only 2 Instal...

Страница 12: ...see 6 1 Maintenance intervals and items 4 2 Precautions for installation sites Do not install the detector in a place with vibrations or shocks The detector consists of sensitive electronic parts The...

Страница 13: ...ery which is not properly grounded Before installing the detector in machinery the machinery must be grounded properly Do not install the detector in a place where interference gases exist around it T...

Страница 14: ...talling a lightning arrester before the field devices and central processing equipment For information on how to use a lightning arrester please contact the manufacturer Grounding In addition to light...

Страница 15: ...tor 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...

Страница 16: ...F etc For the wiring method see 4 6 How to wire Diffusion type NOTE Maximum surface roughness of the enclosure face for sealing is Ra6 3 m Hexagon socket head bolt M5 x 20 Washer Pressure proof packin...

Страница 17: ...for the installation environment installation direction etc Use a square drip proof cover for an inferior environment condition such as a place with a risk of water splash Use a round drip proof cover...

Страница 18: ...aw the cable to the detector by the means that do not impair the explosion proof performance Connect the power to the indicator alarm unit after all wiring work is completed Wiring with the power conn...

Страница 19: ...3 4 5 and 6 are shown on the terminal plate of the detector head Perform wiring in the correct wiring order according to the following connection diagrams When attaching the lid of the detector head...

Страница 20: ...erformance When wiring is completed check for wrong wiring once again before turning on the power If the power is turned on with wrong wiring sensor disconnection will occur and the unit will become u...

Страница 21: ...icator alarm unit 5 3 How to detect Turn on the power switch of the indicator alarm unit Gas detection starts after the initial clear 5 4 How to exit Turn off the power switch of the indicator alarm u...

Страница 22: ...r more for every six months to maintain the performance as a safety unit Maintenance item Maintenance content Daily maintenance Monthly maintenance Regular maintenance Power lamp check Check that the...

Страница 23: ...alarm test function Checks the alarm lamp Checks ALM activation Checks the external alarm Checks the activation of the external alarm such as a buzzer Span adjustment Performs the span adjustment by u...

Страница 24: ...ing to zero at the indicator alarm unit side under the condition that no gas is present around the detection point If a gas is present around the detection point collect fresh air in a gas sampling ba...

Страница 25: ...adjustment NOTE The span adjustment requires dedicated tools We recommend the adjustment be performed by RIKEN KEIKI CAUTION Before starting the span adjustment provide the detector with the calibrat...

Страница 26: ...rthest from the cable inlet see figure below insert it lightly shallowly to the socket in the hole of the main unit Then push the gas sensor to insert it deep in the socket 5 Put the sensor guard over...

Страница 27: ...ation must be checked after replacement by our service engineer For the stable operation of the detector and safety ask our service engineer to take care of replacement of the part Request RIKEN KEIKI...

Страница 28: ...dures 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 wir...

Страница 29: ...ke a remedial measure i e taking actions the same as those for the gas alarm Environmental changes Perform zero adjustment A gas alarm is triggered despite of no gas leak and no other abnormalities at...

Страница 30: ...2 for mounted 13 for attached Operating temperatures 10 100 At a constant condition 40 70 At a constant condition Operating humidities Below 95 RH Non condensing Structure Wall mounting type 2B 50A pi...

Страница 31: ...for attached Operating temperatures 10 100 At a constant condition 40 70 At a constant condition Operating humidities Below 95 RH Non condensing Structure Wall mounting type 2B 50A pipe attachable Ex...

Страница 32: ...entrations This sensor detects any combustible gases The detection range is from zero to the lower explosive limit When a highly concentrated gas over the lower explosive limit comes into contact with...

Страница 33: ...put 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...

Страница 34: ......

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