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RKI Instruments SD-1GH Operating Manual Download Page 57

 

 

 

-  57  - 

SD-1GH 

11 

Calibration Parts List 

 

NOTE

: Contact RKI to order cylinders from pg. 43 and pg. 47 that are not listed below. 

 

 

Description 

Part Number 

Calibration cup 

81-1148 

Humidifier, 6”, with tubing 

33-2001RK-01 

Regulator, with gauge and knob, 0.5 LPM continuous flow, for 17 liter and 34 liter 

steel cylinders (cylinders with external threads) 

81-1050RK 

Regulator, with gauge and knob, 0.5 LPM continuous flow, for 34 liter aluminum, 

58 liter, and 103 liter calibration cylinders (cylinders with internal threads) 

81-1051RK 

C4H10 (isobutane): 50 ppm in air, 34 liter steel calibration cylinder 

81-0105RK-01 

C4H10 (isobutane): 50 ppm in air, 103 liter calibration cylinder 

81-0105RK-03 

C4H10 (isobutane): 250 ppm in air, 34 liter steel calibration cylinder 

81-0026RK-01 

C4H10 (isobutane): 250 ppm in air, 103 liter calibration cylinder 

81-0026RK-03 

C4H10 (isobutane): 500 ppm in air, 34 liter steel calibration cylinder 

81-0017RK-01 

C4H10 (isobutane): 3600 ppm (20% LEL) in air, 34 liter steel calibration cylinder 

81-0021RK 

C5H12 (pentane): 8000 ppm in air, 34 liter steel calibration cylinder 

81-9055RK-01 

C5H12 (pentane): 8000 ppm in air, 103 liter calibration cylinder 

81-9055RK-03 

C6H14 (hexane): 360 ppm in air, 34 liter steel calibration cylinder 

81-9005RK-01 

C6H14 (hexane): 500 ppm in air, 34 liter aluminum calibration cylinder 

81-0083RK-21 

C6H14 (hexane): 500 ppm in air, 103 liter calibration cylinder 

81-0083RK-23 

C6H14 (hexane): 1100 ppm (10% LEL) in air, 103 liter calibration cylinder 

81-0007RK-03 

C6H14 (hexane): 1800 ppm (15% LEL) in air, 34 liter steel calibration cylinder 

81-0007RK-01 

CH4 (methane): 1000 ppm in air, 34 liter steel calibration cylinder 

81-0085RK-01 

CH4 (methane): 1000 ppm in air, 103 liter calibration cylinder 

81-0085RK-03 

H2 (hydrogen): 500 ppm in air, 34 liter steel calibration cylinder 

81-0000RK-71 

H2 (hydrogen): 500 ppm in air, 103 liter calibration cylinder 

81-0000RK-73 

H2 (hydrogen): 1000 ppm in air, 34 liter steel calibration cylinder 

81-0000RK-01 

H2 (hydrogen): 1000 ppm in air, 103 liter calibration cylinder 

81-0000RK-03 

IPA (isopropyl alcohol): 1000 ppm in air, 34 liter steel calibration cylinder 

81-0035RK-01 

IPA (isopropyl alcohol): 1000 ppm in air, 103 liter calibration cylinder 

81-0035RK-03 

IPA (isopropyl alcohol): 2000 ppm (10% LEL) in air, 17 liter calibration cylinder 

81-0014RK 

Zero air, 34 liter steel calibration cylinder 

81-0076RK-01 

Zero air, 103 liter calibration cylinder 

81-0076RK-03 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Summary of Contents for SD-1GH

Page 1: ...Smart Transmitter Gas Detector Head SD 1GH Operating Manual Part Number 71 0531 Revision P2 Released 10 28 20 ...

Page 2: ...y unit not a control unit The alarm contact output of the detector must be used for an external alarm lamp buzzer while the alarm signal output must be used for an indicator or external recorder If these outputs are used to control other units we shall not be responsible for any malfunctions 4 The gas sensing part of the sensor installed in this detector is made of metal porous sintered alloy perm...

Page 3: ...asic Operating Procedures 23 5 3 Starting the Detector 24 5 4 Modes 25 5 5 User Mode 26 5 6 Turning Off the Detector 28 6 Operations and Functions 29 6 1 Gas Alarm Activation 29 6 2 Fault Alarm Activation 30 6 3 External Output Operation 30 6 4 Suppression Function 32 7 Maintenance 33 7 1 Maintenance Intervals and Items 33 7 2 Maintenance Mode 34 7 3 Performing a Calibration 43 7 4 Parts Replaceme...

Page 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 that it can be used properly The detector uses a built in gas sensor to detect abnormalities in the air caused by presence of gases The concentration of detected gas is displayed on the seven segment LE...

Page 5: ...roof certificate Please confirm the detector specification before using Please refer to the Declaration of Conformity at the end of this manual if you have CE marking type You can confirm detector specification on the name plate as follows ATEX IECEx CE marking type name plate TIIS type name plate CE marking Ex marking TIIS certificate ...

Page 6: ...dow plate with a sharp object WARNING Power supply Before turning on the detector be sure the voltage is properly applied Using an unstable power supply may cause malfunctions Need of grounding circuit Do not cut the grounding circuit or disconnect the wire from the grounding terminal Defects in protective functions Before starting the detector check the protective functions such as protective gro...

Page 7: ...ly 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 solvents to the window plate The window plate material is a polycarbonate resin When solvents liquid or highly concentrated vapor ar...

Page 8: ...ons Technical Data Protection Method Flameproof enclosure d Certificate Numbers IECEx KEM 10 0036X KEMA 10ATEX0083 X Group II Category 2G Type of Protection and Marking Mode Ex db IIC T5 Equipment Protection Level Gb Ambient Temperature 20 C to 60 C Electrical Data Supply voltage 24 V dc Typ Output signal 4 to 20 mA Applicable Standard IEC 60079 0 2017 IEC 60079 1 2014 06 EN IEC 60079 0 2018 EN 60...

Page 9: ...o 53 C Electrical Data Supply voltage DC24V 130 mA Analog signal output DC24V 25 mA Contact output contact capacity AC250V 0 5A load resistance DC30V 0 5A load resistance Applicable Standard JNIOSH TR NO 43 2008 Installation Hazardous Location Zone 1 Nonhazardous Location Installation Diagram Signal Signal CVVS Cable Indicator Gas Detector SD 1GH ...

Page 10: ...0 3 Product Components 3 1 Main Unit and Standard Accessories ATEX IECEx Specification TIIS Specification Standard Accessories Operating manual Dedicated handling lever used for the wiring Dedicated control key ...

Page 11: ...on 3 key Switch menus or change a value UP 4 key Switch menus or change a value DOWN 5 Power lamp Power lamp Detection mode Solid green Maintenance mode Flashing green 6 Alarm lamp Turns red when the alarm setpoint value is reached 7 Fault lamp Turns yellow when a detector abnormality is detected 8 Concentration value display Displays the gas concentration 8 Concentration value display 5 Power lam...

Page 12: ...ply Gas alarm contact ALARM Contact activation De energized De energized in a normal environment ON ALARM Closed contact during alarm Alarm Contact Controller Display POWER ALARM FAULT Seven segment LED four digit Magnetic operation part MENU ESC SET Transmitter 4 20 mA transmission ...

Page 13: ...tions or shocks Do not install the detector in a place exposed to water oil or chemicals When selecting installation points avoid a place where the detector is exposed to water oil or chemicals Do not install the detector in a place where the operating temperature range is exceeded The detector must be installed in a stable place where the operating temperature is maintained and does not change su...

Page 14: ...machinery the machinery must be grounded properly Do not install the detector in a place where other gases exist around it The detector must not be installed in a place where other gases exist around it 4 3 Precautions for System Designing Using a stable power supply The external output and alarm contact of the detector may be activated when the power is turned on when momentary blackout occurs or...

Page 15: ... use a lightning arrester please contact the manufacturer Grounding In addition to lightning there are other sources of surge noise To protect units from these noise sources the units must be grounded The lightning arrester has a circuit to remove a surge voltage so that signals may be attenuated Before installing a lightning arrester verify that it works properly Proper use of alarm contact The d...

Page 16: ...where parts of the machinery must be removed to perform maintenance or where the detector cannot be removed because tubes or racks prevent access to it Do not install the detector in a place where maintenance involves dangers for example near a high voltage cable 4 4 How to Install Installation Dimensions and Maintenance Space 1 Attach the detector to the mounting surface using four M5 screws Alar...

Page 17: ...d to a grounding circuit When stranded wires are used prevent wires from contacting each other Use the dedicated handling lever to wire Use appropriate wiring cables 4 5 Wiring Recommended Cable 3 wire when the contact is not used CVVS1 25 sq 3 core 5 wire when the contact is used CVVS1 25 sq 5 core Parts length table of outside conductor lead in Cable overall outer diameter mm Rubber seal inner d...

Page 18: ...12 0 5 Ф11 5 Ф12 5 Ф12 0 Ф13 0 6 Ф12 5 Ф13 5 Ф13 0 Ф14 0 Terminal Plate Figure 24 VDC DC 1 Common 2 4 20 mA Sig 3 Contact 4 Contact 5 Terminal Plate Specifications Specifications of terminal plate Rated voltage 250 VAC Rated current 12 A However it depends on cables to be used Connection conditions Cables 0 25 2 5 mm2 Bare wire length 8 9 mm Connecting tool Dedicated handling lever accessory or dr...

Page 19: ...due to a longer bare wire length may cause defective insulation or a short circuit Be careful not to break up the wire If the wire is broken up when inserted to the terminal this may cause defective insulation or heating 8 9 mm CAUTION A bar terminal of the specified model must be used Using other bar terminals invalidates the warranty of the performance Compatible bar terminal For a bar terminal ...

Page 20: ... it with the tool Attaching External Cable As shown on the figure below attach the parts in the following order cable gland eccentric washer washer and rubber seal to the cable then connect the cable into the main unit then screw the cable gland to tighten the rubber seal Main unit case Cable gland Below 1 5 mm External cable Cable Gland Eccentric washer Washer Rubber seal Main unit case ...

Page 21: ...e used 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 the spring by mistake it does not contact the conductive part This may cause defective electric conduction or heating Grounding Connect the detector to your groun...

Page 22: ...SD 1GH 22 Wiring Diagrams Connecting to a Controller Connecting to a DCS or PLC 1 2 3 4 5 GND Sig SD 1GH 24 V RM 593 etc 1 2 3 4 5 SD 1GH Upper unit DCS PLC Relay terminal plate Power supply 24 VDC ...

Page 23: ...ice wiring is correct and secure Check that the power supply voltage is compliant with the specifications Because the external contact may be activated during startup make sure an activated contact won t affect an external device 5 2 Basic Operating Procedures Detection mode is used for normal operations Detection Mode is activated after the power is turned on The detector is restarted after recov...

Page 24: ... up it enters Detection Mode NOTE Start up Operation Procedures approximately 25 seconds for system check of the detector and alarm deactivation Power on Initial clear approximately 25 seconds Detection mode NOTE The semiconductor sensor used in the detector must be warmed up for a specified time after power is supplied The required warm up time depends on the unpowered time for the sensor If it i...

Page 25: ...Adjustment 2 2 Perform the span adjustment Zero Span Initialization 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 Zero Suppression Pattern Setting 2 4 6 Zero Suppression Value Setting 2 4 7 Alarm Con...

Page 26: ...ours 5 5 User Mode Detection Mode Press the MENU ESC key for three seconds User Mode 1 0 ROM SUM Display Show the program version and others This is not typically used by the user 1 1 Zero Adjustment Perform the zero adjustment 1 2 Various Setting Display Show various setting values 1 3 Mode Switching Switch to Maintenance Mode Zero Adjustment P27 Setting Display P28 P34 To 1 0 LED ...

Page 27: ... adjustment NOTE If the zero calibration fails the detector returns to 1 1 after FAIL is displayed In this case the zero adjustment has not been completed 1 1 Press SET key Current Concentration Value Display Press the SET key to perform the zero adjustment Return to 1 1 Under Zero Adjustment CAL is displayed Wait for a while until the adjustment is completed Zero Adjustment Completed It automatic...

Page 28: ...ut terminal of the detector If the alarm contact is energized option it is activated when the detector is turned OFF Setting Display 1 2 Show various setting values 5 6 Turning Off the Detector To turn off the detector turn off the power supply 24 VDC to the detector 1 2 Press SET key Alarm Setpoint Display Alarm Delay Time Display seconds Zero Suppression Value Display Alarm Contact Specification...

Page 29: ...ion range Over Scale is displayed Power Indicator Lamp POWER Green During operation this lights up continuously Alarm Indicator Lamp ALM Red It lights up when the alarm setpoint value is reached or exceeded Contact Activation The contact is activated when the gas concentration reaches or exceeds the alarm setpoint value only when the alarm is used The contact activation automatically resets when t...

Page 30: ...arm is triggered when an abnormality is detected The fault lamp yellow lights up and an error message appears on the display Determine the cause s and take appropriate actions After the detector is recovers from the fault it restarts with the process normally performed right after it is turned on initial clear If the detector repeatedly malfunctions contact RKI immediately NOTE For information on ...

Page 31: ...4 20 mA output setting Understand how the detector functions and take actions if necessary so that the signal receiver side can prepare to avoid false alarms 7 INHIBIT Depending on the setting of section 4 2 5 mA setting 2 5 mA 4 mA HOLD 4 20 mA setting 4 mA 8 Power Off 0 mA Example of Gas Concentration and External Output 4 20 mA specification Maintenance output 2 5 mA setting 2 5 mA 4 mA 20 mA 2...

Page 32: ...te around zero even in a normal environment The suppression function obscures influences by environmental changes and interference gases around zero that have no meaning for your management rules for a gas alarm This function is used to hide suppress the fluctuation of the reading around zero NOTE The suppression function is factory set The standard setting value is 10 FS In Maintenance Mode this ...

Page 33: ...ce 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 Description Daily Maintenance Monthly Maintenance Regular Maintenance Power Supply Check Check that the power lamp is on Concentration Display Check Check that the concentration display value is zero If the reading i...

Page 34: ...nsor 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 Zero Suppression Pattern Setting 2 4 6 Zero Suppression Value Setting 2 4 7 Alarm Contact Specification Setting 2 4 8 Energized De energized Contact Setting 2 4 9 Zero Follower Selection 2 4 A Maintenance Mode External Output Setting 2 4 B External Output Adj...

Page 35: ...nt Perform a span adjustment Span Adjustment P45 2 3 Zero Span Initialization Initialize the zero span adjustment after the sensor is replaced 2 4 Environmental Setting Set various operations and functions Environmental Setting P42 2 4 0 and 2 4 3 to 2 4 H are factory set They are not typically used by the user Detection Mode While in Detection Mode press and hold the MENU ESC key for three second...

Page 36: ...ttings Display Display various electrical settings This is not used by the user 2 6 Enter Factory Mode This is not used by the user 2 7 Return to User Mode rET is displayed Press the SET key again to return to User Mode To 2 0 Test Mode ...

Page 37: ...t automatically returns to Detection Mode in ten hours In Alarm Test Mode the gas concentration equal to the reading is output depending on the Maintenance Mode setting Take actions if necessary so that the signal receiver side can prepare for false alarms Alarm Test Mode 2 0 Enter Maintenance Mode as described on page 35 2 0 Press SET key 2 0 0 Gas Test 2 0 1 Alarm Test 2 0 2 Fault Test 2 0 3 LED...

Page 38: ...tenance Mode setting be careful when performing this test Gas Test 2 0 0 Enter Alarm Test Mode as described on page 37 2 0 0 Press SET key Apply the test gas and perform the gas test Stop applying the test gas When the reading drops press the MENU ESC key to cancel the test and to go back to the original state To 2 0 0 ...

Page 39: ...arm Test 2 0 1 Enter Alarm Test Mode as described on page 37 and scroll to 2 0 1 2 0 1 Press 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 Alarm Test ON OFF The contact setting is Alarm or Alarm or Fault Select either ON OFF and then press the SET key ...

Page 40: ...T key Fault Test ON OFF Select either ON OFF Switch ON and press the SET key to trigger the fault alarm Return to OFF and press the SET key to cancel the test Pressing the MENU ESC key also cancels the test and returns the unit 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 a gas conc...

Page 41: ...displayed for a RAM fault and F RO is displayed for a ROM fault If there is a fault in the RAM and the ROM F RA and F RO alternate 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 PASS is displayed Press the SET key to go back to the original state To 2 0 4 ...

Page 42: ...FF and then press the SET key to confirm the selection When ON is selected in Detection Mode InHI and 0 0 gas concentration value are displayed alternately As a result an alarm is not triggered to external devices 2 4 2 Alarm Setpoint Setting Set the alarm setpoint 2 4 3 to 2 4 H They are factory set and not typically used by the user To 2 4 0 Alarm Setpoint Setting P42 2 4 2 Press SET key Alarm S...

Page 43: ... 2000 ppm IPA 1000 ppm 1300 ppm 5000 ppm IPA 2000 ppm 2500 ppm C3H3N Acrylonitrile 100 ppm Isobutane 50 ppm 70 ppm C5H10O2 Propyl acetate 1000 ppm IPA 500 ppm 500 ppm C6H6 Benzene 100 ppm Isobutane 75 ppm 35 ppm 500 ppm Isobutane 1000 ppm 300 ppm C6H14 Hexane 500 ppm Hexane 360 ppm 360 ppm 3000 ppm Hexane 1800 ppm 1800 ppm CH2Cl2 Methylene chloride 500 ppm Isobutane 500 ppm 180 ppm CH4 Methane 200...

Page 44: ...e 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 The unit returns to 2 1 after PASS is displayed If the zero adjustment fails it automatically returns to 2 1 after FAIL is displayed Return to 2 1 Return to 2 1 1 3 In 1 3 press the SET key Then press the SET key again for three seconds The 2 ...

Page 45: ... cup on the detector and connect the regulator to the calibration cup s GAS IN fitting using the humidifier assembly Turn the regulator knob counterclockwise to open it and allow gas to flow for 2 minutes Press the SET key Span Adjustment When the reading blinks adjust it to the introduced gas concentration by pressing the or key After adjusting the value press the SET key Span Adjustment Complete...

Page 46: ...aged and then push the sensor all the way in 6 Use a 6 mm hexagonal screwdriver Allen wrench to reinstall the sensor guard 7 Turn on power to the SD 1GH 8 Set the heater current a While in Detection Mode press and hold the MENU ESC key for three seconds to enter User Mode b Scroll to 1 3 and press and release SET c Press and hold SET for 3 seconds to enter Maintenance Mode d Scroll to 2 4 and pres...

Page 47: ... days 7 days 1 3 months 14 days 3 months or more 1 month 10 Initialize the zero span a While in Detection Mode press and hold the MENU ESC key for three seconds to enter User Mode b Scroll to 1 3 and press and release SET c Press and hold SET for 3 seconds to enter Maintenance Mode d Scroll to 2 3 and press and release SET e When CLE appears press and release AL SET 11 Set the load voltage a While...

Page 48: ...tch the value shown below Detection Gas Load Voltage C2H5OH Ethanol 2000 ppm 600 mV 20 mV 5000 ppm 600 mV 20 mV C3H3N Acrylonitrile 400 mV 20 mV C5H10O2 Propyl acetate 700 mV 20 mV C6H6 Benzene 100 ppm 400 mV 20 mV 500 ppm 600 mV 20 mV C6H14 Hexane 500 ppm 600 mV 20 mV 3000 ppm 600 mV 20 mV CH2Cl2 Methylene chloride 400 mV 20 mV CH4 Methane 400 mV 20 mV EO Ethylene oxide 600 mV 20 mV MEK Methyl et...

Page 49: ...rom direct sunlight In a place where gases solvents or vapors are not present 8 2 Relocating the Detector When the detector is relocated select a new place in accordance with 4 2 Precautions for installation points on page 13 and 4 4 How to install on page 16 For information on wiring see 4 5 Wiring on page 17 The unpowered time must be minimized when the detector is relocated 8 3 Disposal When di...

Page 50: ...de 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 detector and device wiring Abnormal operations Disturbances by sudden surge noise etc Restart the detector If the symptom is observed frequently take appropriate measures to eliminate the noise Sensor abnorm...

Page 51: ...oint Presence of interference gas Disturbances by interference gases such as solvents cannot be eliminated completely Disturbance by noise Turn off and restart the detector If the 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 i...

Page 52: ...in response to an alarm Contact capacity 250 VAC 0 5 A 30 VDC 0 5 A resistant load Transmission system 3 wire type analog transmission common cable for power and signal power signal common Transmission specifications 4 20 mA DC linear load resistance under 300 Ω resolution divided into 200 Transmission cable CVVS1 25 sq 3 core or CVVS1 25 sq 5 core when the contact is used Transmission distance Be...

Page 53: ... 53 SD 1GH 10 2 ATEX IECEx Outline Drawing ...

Page 54: ...or energized de energized in response to an alarm Contact capacity 250 VAC 0 5 A 30 VDC 0 5 A resistant load Transmission system 3 wire type analog transmission common cable for power and signal power signal common Transmission specifications 4 20 mA DC linear load resistance under 300 Ω resolution divided into 200 Transmission cable CVVS1 25 sq 3 core or CVVS1 25 sq 5 core when the contact is use...

Page 55: ...ylonitrile 100 ppm 25 ppm 0 5 ppm C5H10O2 Propyl acetate 1000 ppm 200 ppm 5 ppm C6H6 Benzene 100 ppm 25 ppm 0 5 ppm 500 ppm 100 ppm 5 ppm C6H14 Hexane 500 ppm 100 ppm 5 ppm 3000 ppm 1000 ppm 25 ppm CH2Cl2 Methylene chloride 500 ppm 100 ppm 5 ppm CH4 Methane 2000 ppm 500 ppm 10 ppm EO Ethylene oxide 1000 ppm 200 ppm 5 ppm MEK Methyl ethyl ketone 500 ppm 200 ppm 5 ppm R404a 2000 ppm 500 ppm 10 ppm ...

Page 56: ...le Metal dioxide can measure a gas concentration based on changes in the electric conductivity of semiconductor caused by gas adsorbed on its surface RL Load resistance Vo Output voltage VH Heater voltage Vs Sensor voltage VH Vs RL Vo ...

Page 57: ...ntane 8000 ppm in air 103 liter calibration cylinder 81 9055RK 03 C6H14 hexane 360 ppm in air 34 liter steel calibration cylinder 81 9005RK 01 C6H14 hexane 500 ppm in air 34 liter aluminum calibration cylinder 81 0083RK 21 C6H14 hexane 500 ppm in air 103 liter calibration cylinder 81 0083RK 23 C6H14 hexane 1100 ppm 10 LEL in air 103 liter calibration cylinder 81 0007RK 03 C6H14 hexane 1800 ppm 15 ...

Page 58: ...eplacement sensor SG 8521 C6H6 Benzene 0 100 ppm and 0 500 ppm replacement sensor SG 8521 C6H14 Hexane 0 500 ppm replacement sensor SG 8521 C6H14 Hexane 0 3000 ppm replacement sensor SG 8511 CH2Cl2 Methylene chloride 0 500 ppm replacement sensor SG 8523 CH4 Methane 0 2000 ppm replacement sensor SG 8511 EO Ethylene oxide 0 1000 ppm replacement sensor SG 8563 MEK Methyl ethyl ketone 0 500 ppm replac...

Page 59: ...tion unit meaning percentage of the lower explosive limit ppm A concentration unit meaning part per million of the detection gas Calibration Adjusts the readings to the known calibration gas concentration value Zero suppression A function to hide the sensor drift around zero Alarm delay time A function which temporarily suspends alarm activation to prevent a false alarm caused by noise INHIBIT The...

Page 60: ...SD 1GH 60 ...

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