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7 Maintenance

7-1. Maintenance intervals and items

64 / 87

7-1-2. Monthly regular maintenance

Monthly regular maintenance is performed to check the soundness of the exposition-proof performance.
Perform monthly regular maintenance according to the maintenance items and criteria shown in the table
below.

Maintenance

item

Criteria



Casting enclosure

Is there any abnormality or damage on the enclosure?



Clamping screws and bolts

Is there any abnormality such as looseness or loss of clamping
screws and bolts?



Explosion-proof certification
nameplate

Is there any abnormality on the nameplate on which a model
examination certificate mark is printed?



Transparent window

Is there any crack, discoloration, or deformation on the transparent
window?



Grounding terminal

Is there normal wire connection to the grounding terminal?



Cable gland

wiring

Is there any abnormality on the cable gland or wiring?

①

②

③

④

⑤

⑥

Содержание OHC-800

Страница 1: ...PT3E 04914 Explosion Proof Calorimeter OHC 800 Operating Manual...

Страница 2: ...ual to enhance the knowledge and experience before using the calorimeter Throughout this manual the following indications are used to ensure safe and effective work DANGER This message indicates that...

Страница 3: ...4 1 From display just after power on to measurement start 33 4 2 How to switch display screens 35 4 3 Switching to other mode 36 4 4 Self diagnostic function 37 4 5 Operations of contacts display and...

Страница 4: ...1 1 Daily maintenance 63 7 1 2 Monthly regular maintenance 64 7 1 3 Biannual regular maintenance 65 7 2 Recommended regular replacement parts 66 8 Storage Relocation and Disposal 67 8 1 Procedures to...

Страница 5: ...fail to perform a regular maintenance Use appropriate cables to wire Use ring terminals etc for electrical connections and ensure safe connection without any slack or tangle Use ring terminals to conn...

Страница 6: ...always check that the voltage is properly applied Do not use an unstable power supply because it may cause malfunctions The settings in the calorimeter vary depending on the AC and DC power specifica...

Страница 7: ...ransceiver is used it must be used in a place where it disturbs nothing To restart the calorimeter wait for five seconds or more before doing it Restarting the calorimeter within five seconds may caus...

Страница 8: ...ller The calorimeter has three contact outputs and these are activated by malfunction etc of the device 1 5 2 Technical data Explosion proof structure Flame proof enclosures Certificate number TIIS No...

Страница 9: ...00 has a flame proof enclosure Explosion proof class Ex d B H2 T4 and can be used in a Class 1 location However if the power source and display instrument etc connected to it do not have an explosion...

Страница 10: ...ata Name CALORIMETER Type OHC 800 Protection Method Flameproof enclosure d Certificate numbers IECEx DEK 12 0058X DEKRA 12ATEX0187 X Group II Category 2G Type of Protection and Marking code Ex db IIB...

Страница 11: ...roof spec 11 87 1 6 3 System configuration for use in hazardous location CVVSCable Sig Sig Sig Sig Indicator etc ACPower DC Power L N PE CaloriMeter OHC 800 HazardousLocation NonhazardousLocation Inst...

Страница 12: ...e secured by additional means to prevent twisting At the internal ground connection the cable lug shall be installed between the washer and the toothed lock washer Gas conditions Composition IIC gases...

Страница 13: ...1 Important Notices on Safety 1 6 Information about explosion proof performance Overseas explosion proof spec 13 87 Earth terminal Cable gland...

Страница 14: ...verseas explosion proof spec 14 87 Please install a cable gland into OHC 800 according to the following figure Please tighten a bolt of a cable gland at 40N m or more Special conditions for safe use R...

Страница 15: ...interference gases such as nitrogen and carbon dioxide NOTE For information on Opt Sonic calculation see Section 10 2 Principle of this product Opt Sonic calculation is a coined word by RIKEN KEIKI Th...

Страница 16: ...key magnet Hex key wrench 2 mm and 6 mm one each Fuse 250V 1A 5 x 20 mm two Cable gland CAUTION Use the supplied dedicated magnet control key to operate the calorimeter If products other than these a...

Страница 17: ...ough the measuring gas Power terminal unit Supplies power to other units This unit relays signals between units performs contact output and outputs 4 20 mA analog signals and RS 485 MODBUS communicati...

Страница 18: ...e display content in MEASURING MODE Confirms processing etc LCD display Displays measurement values operation statuses or other information IrDA communication port The IrDA communication port for main...

Страница 19: ...n any of the following locations 1 Place where the calorimeter is exposed to oil chemicals etc 2 Place with vibrations 3 Place where radio wave or noise is generated 4 Place where the calorimeter may...

Страница 20: ...cure this space during construction planning or installation Maintenance space Unit mm CAUTION Do not drop or give strong shock to the calorimeter during transportation or installation Otherwise the c...

Страница 21: ...tance load 6 7 Power FG Functional Grounding EARTH 8 L 100 240 VAC 10 50 60 Hz max 18 VA or 24 VDC 10 max 5 W 9 N 10 RS 485 communication A Input output terminals for communication via RS 485 MODBUS 1...

Страница 22: ...VAC Electronic current 20mA 1A For this reason the power terminal unit with DC specifications can not be used as it is when SSR output is taken into In this case add an external AC relay outside of OH...

Страница 23: ...2 2 core 10 0 CVVS 2 mm2 2 core 11 0 Contact x 1 line CVVS 1 25 mm2 2 core 10 0 CVVS 2 mm2 2 core 11 0 Contact x 2 lines CVVS 1 25 mm2 4 core 11 0 CVVS 2 mm2 4 core 12 0 Contact x 3 lines CVVS 1 25 mm...

Страница 24: ...ed with a rubber seal and a seal plug as shown on the left of the figure below 1 Cable gland 2 Clamp washer Note Place the right side of the face 3 Washer 5 Washer Seal plug Rubber seal Cable lead in...

Страница 25: ...ps between the overall outer diameters of cables and inner diameters of parts Please specify parts needed for cables to be used Cable overall outer diameter mm Rubber seal inner diameter mm Washer inn...

Страница 26: ...pipe Ensure the grounding to be D type grounding or equivalent less than 100 of the grounding resistance Use cable lugs for the grounding wire without any slack or tangle for safe connection Need of p...

Страница 27: ...ification Allowed time of momentary blackout Up to 40 milliseconds The calorimeter recovers from momentary blackouts that last 40 milliseconds or longer by restarting itself Example of actions To ensu...

Страница 28: ...ed by lightning 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 environm...

Страница 29: ...ay In addition the surge absorbing part SK2 must be attached to the loaded side of the external relay if necessary It may be recommended that the surge absorbing part should be attached to the contact...

Страница 30: ...ent gas supplied from GAS IN to a constant pressure PG Pressure gauge Indicates the pressure of the measuring gas after pressure adjustment FL Flow meter with needle valve Adjusts and indicates the by...

Страница 31: ...imit on the arrival time of the reference gas there is no problem unless the pressure exceeds 0 9 MPa The gas from GAS OUT should be released into the atmosphere in principle but it can be exhaust int...

Страница 32: ...pressure 0 1 MPa Bypass flow rate 5 10 L min Setting pressure 0 1 MPa Bypass flow rate 10 L min 10 3 8 Setting pressure 0 1 MPa Bypass flow rate 10 20 L min Setting pressure 0 1 MPa Bypass flow rate 2...

Страница 33: ...seconds the WARM UP screen appears Initial screen About 5 seconds WARM UP screen For 15 minutes after power on the OHC 800 remains in the warm up state The warm up state is classified into the check...

Страница 34: ...k circle comes between the two solid lines that represent the upper right and lower left limits When adjusted to the middle of the scale the flow rate is about 10 mL min Displays the flow rate of the...

Страница 35: ...c value display Density display WOBBE index display Cyclic display Although this operation changes the information displayed on the LCD it is not reflected on 4 20 mA output signals 4 20 mA signal out...

Страница 36: ...ation status or setting conditions of each unit while continuing measurement In this mode 4 20 mA signals are output without stopping measurement SETUP MODE Used to specify the settings of the calorim...

Страница 37: ...s stopped due to the operation of the check function etc Contact Output 1 is activated and the EV1 lamp orange lights up 4 20 mA signals are output according to the setting value specified by the user...

Страница 38: ...Latching reset for display and contact LATCHING RESET DISP CONTACT LCD display screen After state recovery the calorimeter enters the Trace display state in which the display screen corresponding to...

Страница 39: ...ment To enter CHECK MODE display the MODE CHANGE screen while in MEASURING MODE move the cursor black bar using the keys select CHECK MODE and confirm it using the SET key This operation displays the...

Страница 40: ...y the state of the main controller Display the measuring conditions for calorific value Display the measuring conditions for density Display 4 20 mA setting Display the pressure sensor output Display...

Страница 41: ...en displays the program information for the optical sensor unit the self diagnostic results measured inside the unit etc in turn Displays the program number SUM number Rev number SPE number serial num...

Страница 42: ...and self diagnostic flags failure and warning flags 5 2 3 Check of main controller state MAIN CONTROLLER CONDITION This screen displays the program information for the main controller the self diagnos...

Страница 43: ...E as described in Section 6 2 7 Offset OFFSET ADJUSTMENT Contact RIKEN KEIKI if other item settings need to be changed Unit of densimetry Standard temperature Standard pressure Density offset Menu scr...

Страница 44: ...the OHC 800 P OUT Output of the absolute pressure sensor at GAS OUT of the OHC 800 to be used for pressure correction Output value of GAS differential pressure sensor Output value of REF differential...

Страница 45: ...ng of calorific value calculation conditions CALCULATION FACTOR CALORIFIC VALUE If OPT SONIC CALCULATION is selected the calculation factor is displayed Menu screen 5 2 10 Check of density calculation...

Страница 46: ...product this screen displays a calorific value converted to MJ m3 Gross 0 C and 101 325 kPa and a density converted to a specific gravity AIR 1 respectively 5 2 12 Check of display and contact settin...

Страница 47: ...Section 4 5 Operations of contacts display and signal output after recovery to normal state Every 1 second Operation of Trace display This menu item is used to reset the self latch state of the contac...

Страница 48: ...on on changing the output conditions see Section 6 2 3 4 20 mA condition settings 4 20 mA SETTINGS To enter SETUP MODE display the MODE CHANGE screen while in MEASURING MODE move the cursor black bar...

Страница 49: ...hen OK is selected using the SET keys measurement is stopped and the menu screen for the SETUP MODE is displayed In the menu screen of SETUP MODE press and hold the ESC key for three seconds or more t...

Страница 50: ...an arbitrary test signal for 4 20 mA signals Perform reference calibration Reference calibration is operation for adjusting the reference point of the optical sensor unit Offset Display contact operat...

Страница 51: ...asuring results of the optical and sonic sensors through calculation processing The calculation factor must be set according to the major fluctuating components of interference gases Optical sensor ca...

Страница 52: ...the measuring results of the optical and sonic sensors through calculation processing The calculation factor must be set according to the major fluctuating components of interference gases Optical se...

Страница 53: ...ge setting of 4 20 mA signals When the SET key is pressed in the setting value check screen the CAUTION screen is displayed to inform that 4 20 mA output signal will be changed CAUTION screen English...

Страница 54: ...the test signal output screen appears and a 4 mA or 20 mA test signal is output Using the keys select one of the test signals to output and press the SET key to highlight the line indicating the PWM...

Страница 55: ...displayed to inform that 4 20 mA output signal will be changed Menu screen CAUTION screen English CAUTION screen Chinese CAUTION screen Japanese When OK is selected using the SET keys the 4 mA test s...

Страница 56: ...N of the calorimeter to perform reference calibration Menu screen Check screen In this state supply a sufficient amount of reference gas from the OHC 800 measuring gas IN to check the PHASE ALL value...

Страница 57: ...of the OHC 800 and those of the calorimeter densiometer that the user uses as the criteria or those of the standard gas In the menu screen press the SET key to display the setting value check screen...

Страница 58: ...n and confirm it using the SET key The table below shows the operations that can be selected for the items Item to be changed Available operation Description DISPLAY LCD display operation TRACE DISP A...

Страница 59: ...check screen and display the current settings of communication conditions Next press the SET key to display the input screen and enter and confirm the contrast and brightness in turn using the and SE...

Страница 60: ...items in reverse video in turn from the baud rate Using the and SET keys select and confirm a condition for each of the items Menu screen Setting value check screen Input screen The available value s...

Страница 61: ...on CONTACT TEST Output an arbitrary test signal for contact signal In the menu screen press the SET key to display CAUTION screen informing that a contact signal will change Menu screen CAUTION screen...

Страница 62: ...it cannot download Perform 10 to 30 seconds later again Menu screen STANDBY screen CAUTION screen Prepare for a communication equipment GX 2009 TYPE DL etc in STANDBY screen state After start communic...

Страница 63: ...Maintenance item Criteria POWER lamp In a normal state the POWER lamp remains ON at all times Check that the light remains ON normally Lamp1 Lamp2 and Lamp3 In a normal state the Lamp1 Lamp2 and Lamp3...

Страница 64: ...e Is there any abnormality or damage on the enclosure Clamping screws and bolts Is there any abnormality such as looseness or loss of clamping screws and bolts Explosion proof certification nameplate...

Страница 65: ...ontrast Sensor voltage Unit temperatures 4 20 mA output state GAS OUT absolute pressure fluctuation Optical sensor unit output GAS flow rate Sonic sensor unit output REF flow rate The product stores a...

Страница 66: ...rts OHC 800 Average ambient temperature Recommended regular replacement parts Replacement intervals Less than 50 C None 50 C or more Power terminal unit 5 years This product has a design lifetime of 1...

Страница 67: ...s necessary to store them at normal temperatures and humidities where they are not exposed to direct sunlight In either case keep the front and other lids of the OHC 800 enclosure closed so that the e...

Страница 68: ...tions of coin type lithium manganese dioxide battery Product name CR1220 Nominal voltage 3 V Standard capacity 36 mAh Removal procedure Remove the main controller unit The battery is located in the ba...

Страница 69: ...ptoms as possible If the cause cannot be identified using the information in this chapter contact RIKEN KEIKI 9 1 FAILURE Display State explanation Main cause and required action Main controller ROM a...

Страница 70: ...roller is suspected Optical sensor unit ROM abnormality detected An abnormality in the optical sensor unit ROM The optical sensor unit must be replaced Optical sensor unit RAM abnormality detected An...

Страница 71: ...ng or leak of a flow path in and out of the product is suspected Optical sensor unit Out of detection range measuring gas detected Unless an abnormality in the composition of the measuring gas is foun...

Страница 72: ...nit Out of defined range reference gas flow rate detected Adjust the reference gas flow rate so that the black circle comes between the two solid lines that represent the upper and lower limits Optica...

Страница 73: ...ults Calorific value and density specific gravity detected Check that the conditions specified in the Measuring gas specification sheet are met Main controller 4 20 mA signal output failure detected C...

Страница 74: ...rmissible range The optical sensor contamination or deterioration has progressed The optical sensor unit must be replaced Optical sensor unit Detected low brightness of interference fringes within per...

Страница 75: ...progress via external communications This display does not occur with ordinary specifications Currently in SETUP MODE Automatic reference calibration optional function being performed This display doe...

Страница 76: ...may not be supplied from GAS IN of the OHC 800 Check the operations and procedures thoroughly for correctness and select OK If this screen is frequently displayed a malfunction of the optical sensor...

Страница 77: ...ain cause and required action When you are prompted to enter a password when switching to the SETUP MODE entering an incorrect password causes the screen on the left to be displayed Press the SET or E...

Страница 78: ...or adding the UPS power supply line filter and insulation transformer Internal connection cable abnormalities open circuit not connected short circuit Check for a condition of the internal cable pulls...

Страница 79: ...unction with Contact Output 3 External Output 1 4 20 mA DC insulated source current type maximum load resistance of 300 minimum resolution under 0 01 mA External Output 2 RS 485 MODBUS communication f...

Страница 80: ...ects the points of paraffinic hydrocarbon gases Figure 2 is a graph that shows the correlation between the calorific value of pure gases and refractive index The straight line drawn in this figure rep...

Страница 81: ...h the ratio of ki to k i is approximately constant regardless of the types of interference gases i i k k 3 Using the relational formula 3 the formula 2 can be written as follows i i Sonic x k Q Q 4 Th...

Страница 82: ...e functions dSonic and dOpt However if the gas to be measured includes components with sound speed and refractive index that are not on the straight lines drawn by the functions dSonic and dOpt respec...

Страница 83: ...ity 1 Opt Sonic Sonic d d d d 10 Figure 6 shows the correlation between the Opt Sonic calculation and specific gravity Not only the paraffinic hydrocarbon gases but also the components N2 O2 CO2 and C...

Страница 84: ...ssed as the following formula REF GAS n n L 2 L Chamber length nGAS Refractive index of measuring gas nREF Refractive index of reference gas Light source wavelength The light source wavelength and cha...

Страница 85: ...receiver The speed of sound that travels through the measuring gas vGAS can be expressed as the following formula L vGAS L Distance from the sound wave source to the sound receiver Time in which a sou...

Страница 86: ...he reading when measuring the reference gas concentration Opt Sonic calculation This proprietary technology developed by RIKEN KEIKI in 2007 and 2010 refers to calculating the calorific value and dens...

Страница 87: ...e latent heat obtained when water vapor generated during combustion is compressed Standard temperature Temperature of a gas to be used as a reference for measuring and displaying calorific value and d...

Страница 88: ......

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