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RKI Instruments GX-8000 Operating Manual

Manual is about: Portable Gas Monitor

Summary of GX-8000

  • Page 1

    Portable gas monitor gx-8000 operating manual part number: 71-0390 revision: p2 released: 3/16/16 request for the customers read and understand this operating manual before using this gas monitor. Use it in accordance with this operating manual. Regardless of warranty period, we shall not make any i...

  • Page 2

    Safety information the portable gas monitor model gx-8000 is a gas monitor designed to provide continuous exposure monitoring of combustible gas, oxygen (o2), toxic gas such as carbon monoxide (co) and hydrogen sulfide (h2s) in hazardous environments. The gas sample is sucked in by build-in micro pu...

  • Page 3

    - 1 - 1 outline of the product ......................................................................................................... 2 1-1. Preface .............................................................................................................................. 2 1-2. Purpose of use...

  • Page 4: Outline of The Product

    - 2 - 1 outline of the product 1-1. Preface thank you for choosing our portable gas monitor gx-8000. Please check that the model number of the product you purchased is included in the specifications on this manual. This manual explains how to use the gas monitor and its specifications. It contains i...

  • Page 5: Important Notices On

    - 3 - 2 important notices on safety 2-1. Danger cases danger about explosion-proof do not modify or change the circuit or structure, etc. When measuring the oxygen concentration, do not measure anything but a mixture of air and combustible gases or vapors and toxic gases. When using this gas monitor...

  • Page 6: 2-2. Warning Cases

    - 4 - 2-2. Warning cases warning sampling point pressure the gas monitor is designed to draw gases around it under the atmospheric pressure. If excessive pressure is applied to the gas inlet and outlet (gas in, gas out) of the gas monitor, detected gases may be leaked from its inside, thus leading t...

  • Page 7: 2-3. Precautions

    - 5 - 2-3. Precautions caution do not use the gas monitor where it is exposed to oil, chemicals, etc. Do not submerge the gas monitor under water on purpose. Do not use in a place where the gas monitor is exposed to liquids such as oil and chemicals. The gas monitor, being compliant to ip67, is not ...

  • Page 8

    - 6 - caution others pressing buttons unnecessarily may change the settings, preventing alarms from activating correctly. Operate the gas monitor using only the procedures described in this operating manual. Do not drop or give shock to the gas monitor. The water-proof and explosion-proof properties...

  • Page 9: Product Components

    - 7 - 3 product components 3-1. Main unit and standard accessories after opening the package, check the main unit and accessories. If anything in the following list is not included, contact rki. Ac powered charger: 1 or aa alkaline battery: 3 gas sampling probe and gas sampling hose: 1 shoulder stra...

  • Page 10

    - 8 - note there are the following two combinations of battery units. The following information is printed on the battery unit for the sake of identification to prevent a mistake in combinations. Bul-8000 (certification number tc19437)=> bul-8000(g) for li-ion battery unit bud-8000 (certification nu...

  • Page 11

    - 9 - (1) lcd display displays gas concentrations, alarms, etc. (2) buzzer sound opening emits a buzzer sound at an alarm. (do not block it.) (3) alarm led arrays the lamp blinks in response to an alarm. (4) infrared communication port used to carry out data communications with a pc in data logger m...

  • Page 12

    - 10 - (1) pilot indicator displays the operating status in the detection mode. Normal: blinking (2) combustible gas concentration digital and bar display displays the gas concentration as a numeric value and a level in the bar graph. (3) carbon monoxide concentration digital and bar display display...

  • Page 13: How to Use

    - 11 - 4 how to use 4-1. Before using the gas monitor not only the first-time users but also the users who have already used the product must follow the operating precautions. Ignoring the precautions may damage the gas monitor, resulting in inaccurate gas detection. 4-2. Preparation for start-up be...

  • Page 14

    - 12 - (1) open the recharging jack cover of the gas monitor. (2) put the plug of the ac powered charger into the recharging jack of the gas monitor. (3) connect the ac powered charger to the wall electric outlet. When recharging is started, the recharging indicator lamp lights up (red). (recharging...

  • Page 15

    - 13 - when the gas monitor is used for the first time, or when the battery level is low, attach new aa alkaline batteries. (1) using a flathead screwdriver or coin, turn the battery cover fixing screw counterclockwise to open the battery cover. (2) paying attention to the polarities of batteries, r...

  • Page 16

    - 14 - caution turn off the power of the gas monitor before replacing the battery unit. Detach and reattach the battery unit in a non-hazardous area. If the battery unit screw is not completely tightened, the battery unit may drop off or water may get in through the clearance. Water may also get in ...

  • Page 17

    - 15 - attach the gas sampling probe to the end of the gas sampling hose. Connect the sampling hose securely to the gas inlet (gas in) of the gas monitor. Insert the sampling hose to the gas inlet (gas in) until it clicks into place to ensure connection. Caution use only a gas sampling hose specifie...

  • Page 18

    - 16 - 4-3. Basic operating procedures normally, the detection mode is used for normal operations. (the detection mode is activated after the power is turned on.) > reset display air (long pressing) > (self-latching recovery to normal status>) > > (self-latching) > recovery to normal status>) > > (s...

  • Page 19

    - 17 - 4-4. How to start the gas monitor > keep the power switch pressed for three seconds or more. ↓ lcd all lcds light up. Alarm lamp lights up. Buzzer sounds once. (beep) ↓ date/time display ↓ battery voltage display ↓ gas name display ↓ full scale display ↓ first alarm setpoint display ↓ second ...

  • Page 20

    - 18 - ↓ stel alarm setpoint display ↓ twa alarm setpoint display ↓ id display ↓ detection mode buzzer sounds twice. (beep, beep) note a sensor abnormality alarm is issued before the detection mode is entered if there is any abnormality in the sensor. Press the reset button. This will reset the sens...

  • Page 21: 4-5. How To Detect

    - 19 - 4-5. How to detect in the detection mode, put the gas sampling probe close to the detection area and take the reading on the display. Display example ch4 concentration: 0%lel o2 concentration: 20.9% co concentration: 0 ppm h2s concentration: 0 ppm time: 9:30 battery level: sufficient danger w...

  • Page 22

    - 20 - note if the combustible gas reading exceeds 100% lel, the co reading rises temporarily but this is not abnormal. In a low-temperature environment, the operating time is shortened due to the battery performance property. At a low temperature, the response of the lcd display may get slowed down...

  • Page 23

    - 21 - any instantaneous value during measurement can be recorded. Up to 256 points of data can be recorded. When the number of recorded data points reaches the maximum, recorded data will be overwritten, starting from the oldest data. (1) in the detection mode, keep the ▼/reset switch pressed and p...

  • Page 24

    - 22 - (type-a and e only) if auto range is set on a type with the vol% range for combustible gases, the display is automatically switched to the vol% range when the concentration of a detected combustible gas exceeds 100%lel. When the concentration drops, the display returns to the %lel range again...

  • Page 25: 4-6. Modes

    - 23 - 4-6. Modes details on each mode are provided as follows. (* operations are slightly different depending on the type.) mode item lcd display details detection mode ― concentration display normal state air calibration mode ― air cal perform the zero adjustment. Display and setting mode combusti...

  • Page 26: 4-7. Air Calibration Mode

    - 24 - 4-7. Air calibration mode press the air switch. Keep pressing the air switch. The screen says adj - hold air. When release is displayed, release the air switch. A 30-second countdown is started on the lcd. (countdown for tc sensor versions only) when the zero adjustment is successfully comple...

  • Page 27

    - 25 - note air calibration can be performed even when there is a gas alarm. If the air calibration fails, it displays "fail" - "air cal" and which sensor has become faulty. Press the reset button to reset the fault alarm (calibration failure). When the alarm is reset, the value before calibration i...

  • Page 28: 4-8. Display/setting Mode

    - 26 - 4-8. Display/setting mode this mode allows you to change various displays and settings. Every time the display switch is pressed, various screens are displayed in turn. (* operations are slightly different depending on the type.) lcd detection mode display and setting mode combustible gas mea...

  • Page 29

    - 27 - note the gas monitor automatically returns to the detection mode in about 20 seconds if the gas monitor is left unoperated. However, the gas monitor does not automatically return to the detection mode if the pump operation is set to off. Pump on/off setting used to turn on/off the pump operat...

  • Page 30

    - 28 - (tc sensor versions only) the models that can display combustible gas levels in two ways, "%lel range" and "vol% range," automatically switch between these two displays according to the gas concentration or oxygen concentration, from "%lel range" to "vol% range" and vice versa. They also supp...

  • Page 31

    - 29 - note during vol% range-only measurement, "vol%" and "no alarm" displays blink. Caution no gas alarm is triggered in the combustible gas vol% range-only setting. In the vol% range-only setting, the screen displays [no alarm] because no alarm is triggered. Be careful because the %lel range-only...

  • Page 32

    - 30 - display the full scale or alarm setpoint values and check the alarm operations for the settings displayed. (1) press the display switch and select the "full scale display/alarm setpoint display/alarm test" from the display/setting mode menu. The following screens are displayed in turn on the ...

  • Page 33

    - 31 - used to turn the pump on and off. (1) press the display switch and select the pump on/off setting from the display/setting mode menu. The following screens are displayed in turn on the gas monitor. (2) press the enter switch to set the pump operation to on or off. Note if you do not want to s...

  • Page 34

    - 32 - display an id if it has been registered in advance. Also used to select an id. (1) press the display switch and select the id display/selection from the display/setting mode menu. The following screens are displayed in turn on the gas monitor. (2) press the enter switch to set or select an id...

  • Page 35: 4-9. How To Exit

    - 33 - display concentration data recorded to the manual memory. (1) press the display switch and select the log data display from the display/setting mode menu. The following screens are displayed in turn on the gas monitor. (2) press the enter switch to display the log data. Note if you do not wan...

  • Page 36: Operations and Functions

    - 34 - 5 operations and functions 5-1. Gas alarm activation gas alarm: triggered when the concentration of detected gas reaches or exceeds the alarm setpoint value. > alarm display: notified by blinking of a gas concentration value display, sounding of the buzzer, and lighting of the lamp. Alarm typ...

  • Page 37

    - 35 - gas concentration display in a gas alarm, the gas concentration display and the alarm type display blink. In case of ov er the detection range (over scale), "∩∩∩" is displayed on the lcd. Alarm lamp the alarm consists of two steps. Each of them is triggered when the respective alarm setpoint ...

  • Page 38: 5-3. Other Functions

    - 36 - 5-2. Fault alarm activation fault alarm: triggered when an abnormality is detected in the gas monitor. > alarm display: notified by display of error messages, sounding of the buzzer, and lighting of the lamp. Alarm types: low flow rate, sensor abnormality, battery voltage low, system abnormal...

  • Page 39: Maintenance

    - 37 - 6 maintenance this is an important instrument for the purpose of safety. To maintain the performance of the gas monitor and improve the reliability of safety, perform a regular maintenance. 6-1. Maintenance intervals and items daily maintenance: perform maintenance before beginning to work. M...

  • Page 40: 6-2. How To Clean

    - 38 - 6-2. How to clean clean the gas monitor if it becomes extremely dirty. The gas monitor must be turned off while cleaning it. Use a wash cloth to remove dust. Do not use water or organic solvent for cleaning because they may cause malfunctions. Because an extremely large amount of dust inside ...

  • Page 41

    - 39 - how to replace the activated carbon filter (1) using a coin, etc., turn the activated carbon filter knob counterclockwise (in a direction indicated as open in this figure) to remove it. (2) pull out to remove the filter case from the activated carbon knob. (3) replace the two activated carbon...

  • Page 42

    - 40 - list of recommended regular replacement parts no. Item maintenance intervals replacement intervals quantity (pieces per unit) remarks 1 rubber seal 2 years 1 set 2 tube 6 months 3 - 8 years 1 set 3 pump unit (rp-11) 6 months 1 - 2 years 1 4 li-ion battery pack (bp-8000) 1 about 500 cycles of ...

  • Page 43: Calibration Mode

    - 41 - 7 calibration mode calibrate sensors using a calibration gas at least once every six months. A calibration consists of a zero adjustment and a span adjustment. Calibration requires a demand flow regulator, calibration tubing, and calibration gas. To enter calibration mode, while the instrumen...

  • Page 44

    - 42 - perform a calibration using the procedure shown below. Warm up the gas monitor for 60 minutes or longer before performing the fresh air adjustment to ensure more accurate adjustment. The gases may be introduced in random order. Combustible gas (%lel) o 2 gas *1 co gas h 2 s gas 100% n 2 gas (...

  • Page 45

    - 43 - note before starting a calibration, let the gas monitor draw the gas and wait until the readings are stabilized. Caution only type-a, e *1 perform the calibration in the following order: "fresh air adjustment, span adjustment, zero adjustment for high-concentration combustible gases, and span...

  • Page 46

    - 44 - 7-2. Fresh air adjustment (air cal) note if the existence of other gases in the atmosphere is suspected before performing the fresh air adjustment, use a zero air gas cylinder and a demand flow regulator to perform the fresh air adjustment. Warning when the fresh air adjustment is performed i...

  • Page 47

    - 45 - air cal press the enter switch. The current concentration readings of the gases are displayed. Press the air switch when they are stabilized. When the air switch is pressed, hold air is displayed. Keep pressing the switch until release is displayed. Release the air switch. * only on type-a an...

  • Page 48: 7-3. Span Adjustment

    - 46 - 7-3. Span adjustment auto cal press the enter switch. The span gas concentration is displayed. Use the  or  switch to select the standard 4 sensors or the high concentration combustible gas sensor (if installed). The span gas concentration(s) shown need to be consistent with the concentrati...

  • Page 49

    - 47 - one cal press the enter switch. The span adjustment selection menu is displayed. Press the  or  switch to display a target gas for which the span adjustment should be performed. Every time the  or  switch is pressed, the target gas is changed (in the order of combustible, o2, h2s, co, and...

  • Page 50

    - 48 - 7-4. High concentration combustible gas sensor zero adjustment (vol z. Cal) for type a and e only vol z.Cal press the enter switch. Return to vol z.Cal stop supplying the zero gas. The vol z.Cal display blinks. Until the combustible gas range switches to vol%, the combustible gas concentratio...

  • Page 51: Storage And Disposal

    - 49 - 8 storage and disposal 8-1. Procedures to store the gas monitor or leave it for a long time the gas monitor must be stored under the following environmental conditions. In a dark place under the normal temperature and humidity away from direct sunlight in a place where gases, solvents or vapo...

  • Page 52: 8-3. Disposal Of Products

    - 50 - 8-3. Disposal of products warning do not disassemble the electrochemical type sensor or galvanic cell type sensor because they contain electrolyte. Electrolyte may cause severe skin burns if it contacts skin, while it may cause blindness if it contacts eyes. If electrolyte is adhered on you c...

  • Page 53: Troubleshooting

    - 51 - 9 troubleshooting the troubleshooting does not explain the causes of all the malfunctions which occur on the gas monitor. This simply helps to find the causes of malfunctions which frequently occur. If the gas monitor shows a symptom which is not explained in this manual, or still has malfunc...

  • Page 54

    - 52 - symptoms causes actions a low flow rate alarm is displayed. Fail low flow water or oil, etc. Was drawn in. Check the gas sampling hose for any damage or mark of drawn water or oil, etc. The gas sampling hose is clogged. Check the gas sampling hose for connections, clogging, twisting, etc. The...

  • Page 55: Product Specifications

    - 53 - 10 product specifications 10-1. List of specifications model ＧＸ－８０００ detection principle galvanic cell (os) new ceramic catalytic(nc)/ thermal conductivity(te) electrochemical (es) electrochemical (es) detectable gas oxygen (o2) combustible gas (hc/ch4/h2) hydrogen sulfide (h2s) carbon monoxi...

  • Page 56

    - 54 - typea oxygen (o2) combustible (hc and ch4) * hydrogen sulfide (h2s) carbon monoxide (co) typeb oxygen (o2) combustible (hc and ch4) hydrogen sulfide (h2s) carbon monoxide (co) typec oxygen (o2) combustible (hc and ch4) hydrogen sulfide (h2s) typed oxygen (o2) combustible (hc and ch4) carbon m...

  • Page 57: 10-2. List Of Accessories

    - 55 - 10-2. List of accessories standard accessories battery unit: li-ion battery unit (bul-8000(g)) or dry battery unit (bud-8000(g)) ac powered charger (for li-ion battery unit versions only) shoulder strap gas sampling hose (1 m spiral) gas sampling probe optional accessories waist strap waist s...

  • Page 58: Definition Of Terms

    - 56 - 11 definition of terms vol% gas concentration indicated in the unit of one-hundredth of the volume ppm gas concentration indicated in the unit of one-millionth of the volume %lel an abbreviation for "lower explosion limit." lel refers to the lowest concentration of a combustible gas in air ca...