PT0E-0980 Portable Gas Monitor GX-8000 Operating Manual (PT0-098) Request for the Customers • • • • • Read and understand this operating manual before using the gas monitor. Use the gas monitor in accordance with the operating manual. Regardless of warranty period, we shall not make any compensation for accidents and damage caused by using this product. The compensation shall be made only under the warranty policy of products or parts replacement.
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 pump. The battery can be selected either Li-ion battery or alkaline dry battery. Li-ion battery unit is called BUL-8000 and alkaline dry battery unit is called BUD-8000.
GX-8000 1 1-1. 1-2. 1-3. Outline of the Product.............................................................................................. 4 Preface .................................................................................................................... 4 Purpose of use ........................................................................................................ 4 Definition of DANGER, WARNING, CAUTION, and NOTE ..................................... 4 2 2-1. 2-2.
1 Outline of the Product 1-1. Preface 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 information required for using the gas monitor properly.
2 Important Notices on Safety 2-1. Danger cases 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 in a hazardous area, take the following countermeasures for preventing dangers resulting from electrostatic charges.
2 Important Notices on Safety 2-2. Warning cases 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 to dangers. Be sure that excessive pressure is not applied to the gas monitor while used.
2 Important Notices on Safety 2-3. Precautions 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 water-pressure-resistant. Do not use the gas monitor where a high water pressure is applied to it (under a faucet, shower, etc.
2 Important Notices on Safety 2-3. Precautions 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 and accuracy may be deteriorated. • Do not use the gas monitor while recharging it.
3 Product Components 3-1. Main unit and standard accessories 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 RIKEN KEIKI.
3 Product Components 3-2. Names and functions for each part 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) • BUL-8000 (certification number TC19438)=> BUD-8000(G) Additionally, a nameplate indicating a compatible model is affixed on the top of the battery unit.
3 Product Components (1) (2) (3) (4) LCD display Buzzer sound opening Alarm LED arrays Infrared communication port (5) (6) (7) (8) (9) (10) (11) ▲/AIR switch ▼/RESET switch DISPLAY switch POWER/ENTER switch Gas inlet Gas outlet Recharging jack cover (12) Recharging indicator lamp (13) Sensor cover (14) Activated carbon filter knob (15) Battery unit screws 3-2. Names and functions for each part Displays gas concentrations, alarms, etc. Emits a buzzer sound at an alarm. (Do not block it.
3 Product Components 3-2.
4 How to Use 4-1. Before using the gas monitor 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 Before starting gas detection, read and understand the following precautions. Ignoring these precautions may prevent correct gas detection.
4 How to Use 4-2. Preparation for start-up (1) Open the recharging jack cover of the gas monitor. CAUTION Do not pull the recharging jack cover too hard. It may get damaged. (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).
4 How to Use 4-2. Preparation for start-up (when the optional unit BUD-8000(G) is used) When the gas monitor is used for the first time, or when the battery level is low, attach new AA alkaline batteries. CAUTION • Turn off the power of the gas monitor before replacing the batteries. • Replace the batteries in a non-hazardous area. • Replace all of the three batteries with new ones at one time. • Pay attention to the polarities of the batteries.
4 How to Use 4-2. Preparation for start-up (1) Loosen the two battery unit screws. (They need not be completely detached.) (2) Detach the battery unit. (3) Attach a new battery unit. NOTE Make sure that the battery unit is installed in correct orientation by checking the locations of the connection terminal and projection portions. (4) Securely tighten the two battery unit screws. CAUTION • Turn off the power of the gas monitor before replacing the battery unit.
4 How to Use 4-2. Preparation for start-up • 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 specified by RIKEN KEIKI.
4 How to Use 4-3. Basic operating procedures 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.
4 How to Use 4-4. How to start the gas monitor 4-4. How to start the gas monitor <> Keep the POWER switch pressed for three seconds or more. ↓ LCD Alarm lamp lights up. Buzzer sounds once. (Beep) All LCDs light up.
4 How to Use 4-4. How to start the gas monitor ↓ STEL Alarm Setpoint Display ↓ TWA Alarm Setpoint Display ↓ ID Display ↓ Buzzer sounds twice. (Beep, beep) Detection Mode CAUTION After start-up, perform air calibration before performing gas detection (air calibration mode). 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.
4 How to Use 4-5. How to detect 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 <- Display example CH4 concentration: O2 concentration: CO concentration: H2S concentration: Time: Battery level: 0%LEL 20.9% 0 ppm 0 ppm 9:30 Sufficient DANGER • While conducting measurement in a manhole or confined space, do not lean over or look into the manhole or closed space.
4 How to Use 4-5. How to detect CAUTION • Before performing gas detection, attach the gas sampling probe provided with the gas monitor to prevent disturbances by air dust. • When you measure concentrations of oxygen in inert gases for a long time, the carbon dioxide concentration in the air must be 15% or less. When you use the gas monitor in the air with a carbon dioxide concentration of 15% or higher, perform measurement in as short time as possible.
4 How to Use 4-5. How to detect 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 press the ▲/AIR switch to prepare for recording (about one second). The following screens are displayed in turn on the gas monitor.
4 How to Use 4-5. How to detect (TYPES-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. The following shows an example of switching timing.
4 How to Use 4-6. Modes 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 ― Concentration display Normal state Mode Air Calibration Mode ― AIR CAL Perform the zero adjustment. Display and Setting Mode Combustible Gas Measurement Range Setting HC RANGE Used to select a combustible gas measurement range manually.
4 How to Use 4-7. Air calibration mode 4-7. Air calibration mode Press the AIR switch. Keep pressing the AIR switch. Changes the display to Adj HOLD AIR. When RELEASE is displayed, release the AIR switch. A 30-second countdown is started on the LCD. (TYPES-A and E only) When the zero adjustment is successfully completed, END is displayed, and you return to the detection mode.
4 How to Use 4-7. Air calibration mode 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 is displayed.
4 How to Use 4-8. Display/setting mode 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 Measurement ENTER Range Setting ⇒ P30 Combustible Gas Measurement Range Setting Used to select a combustible gas measurement range manually.
4 How to Use 4-8. Display/setting mode Pump ON/OFF Setting Used to turn on/off the pump operations. ID Display/Selection Display an ID if it has been registered in advance. Also used to select an ID. Log Data Display Display concentration data recorded to the manual memory.
4 How to Use 4-8. Display/setting mode (TYPES-A and E 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 support manual selection of measurement range.
4 How to Use 4-8. Display/setting mode 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 setting screen does not appear different from the auto range setting screen. Even if the concentration exceeds the full scale, the screen does not automatically switch to the vol% range.
4 How to Use 4-8. Display/setting mode 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 gas monitor. (2) Press the ENTER switch to enter the alarm setpoint or other display.
4 How to Use 4-8. Display/setting mode Used to turn on/off the pump operations. CAUTION • While the pump operation is set to OFF, no gas detection is performed because no gas is drawn. • The gas monitor does not automatically return to the detection mode if the pump operation is set to 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.
4 How to Use 4-8. Display/setting mode 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. NOTE • If you do not want to set or select an ID, press the DISPLAY switch to return to the display/setting mode menu.
4 How to Use 4-9. How to exit 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 want to display the log data, press the DISPLAY switch to return to the display/setting mode menu.
5 Operations and Functions 5-1. Gas alarm activation 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.
5 Operations and Functions 5-1. Gas alarm activation Gas Concentration Display In a gas alarm, the gas concentration display and the alarm type display blink. In case of over the detection range (Over Scale), "∩∩∩" is displayed on the LCD. Display example Alarm Lamp The alarm consists of two steps. Each of them is triggered when the respective alarm setpoint value is reached to or exceeded. Buzzer The alarm consists of two steps.
5 Operations and Functions 5-2. Fault alarm activation 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 abnormality, and calibration failure Determine the causes and take appropriate actions.
6 Maintenance 6-1. Maintenance intervals and items 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. • Monthly maintenance: Perform alarm test once a month.
6 Maintenance 6-2. Gas calibration method • We provide services on regular maintenance including span adjustment, other adjustments and maintenance. To make the calibration gas, dedicated tools, such as a gas cylinder of the specified concentration and gas sampling bag must be used. Our qualified service engineers have expertise and knowledge on the dedicated tools used for services, along with other products.
6 Maintenance 6-3. How to clean 6-3. How to clean Clean the gas monitor if it becomes extremely dirty. The gas monitor must be turned off while cleaning it. Use a waste 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 the gas sampling hose may disturb the gas detection, it must be cleaned with dry AIR, etc.
6 Maintenance 6-4. Parts replacement How to replace the activated carbon filter CAUTION • Turn off the power of the gas monitor before replacing the activated carbon filter. • Do not remove the activated carbon filter knob unless the activated carbon filter is to be replaced. If the activated carbon filter knob is loose (not sufficiently tightened), accurate measurement may not be possible due to leaks, or water may get inside.
6 Maintenance 6-4. Parts replacement List of recommended regular replacement parts No. 1 2 3 4 Item Rubber seal Tube Pump unit (RP-11) Li-ion battery pack (BP-8000) Maintenance intervals ⎯ 6 months 6 months ⎯ Replacement intervals 2 year 3 - 8 years 1 - 2 years ⎯ Quantity (pieces per unit) 1 set 1 set 1 1 Remarks About 500 cycles of charging and discharging NOTE The above replacement intervals are recommendation only.
7 Storage and Disposal 7-1. Procedures to store the gas monitor or leave it for a long time 7 Storage and Disposal 7-1. 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 vapors are not present Store the gas monitor in a shipping carton, if any, in which the product was delivered.
7 Storage and Disposal 7-3. Disposal of products 7-3. 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 clothes, that part on your clothes is discolored or its material is decomposed. If contact occurs, rinse the area immediately with a large quantity of water.
8 Troubleshooting 8 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 malfunctions even though remedial actions are taken, please contact RIKEN KEIKI. Symptoms The power cannot be turned on. Causes The battery level is too low.
8 Troubleshooting Symptoms A low flow rate alarm is displayed. FAIL LOW FLOW Causes Water or oil, etc. was drawn in. Actions 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 pump has deteriorated. Request RIKEN KEIKI to replace the pump. Fresh air adjustment cannot be performed.
9 Product Specifications 9-1. List of specifications 9 Product Specifications 9-1. List of specifications Detection principle Galvanic cell type (OS) Gas to be detected Oxygen (O2) Detection range Display resolution Alarm setpoint 0 to 25 vol% 0.1 vol% 18 vol%(L) 25 vol%(H) 40 vol%(OVER) Accuracy of the reading Within ±0.
9 Product Specifications 9-1. List of specifications Detection principle Galvanic cell type (OS) Gas to be detected Oxygen (O2) Detection range Display resolution Alarm setpoint 0 to 25 vol% 0.1 vol% 19.5 vol%(L) 23.5 vol%(L) 40 vol%(OVER) Accuracy of the reading Within ±0.
9 Product Specifications 9-2. List of accessories 9-2.
10 Definition of Terms 9-2. List of accessories 10 Definition of Terms vol% ppm %LEL TWA STEL Gas concentration indicated in the unit of one-hundredth of the volume Gas concentration indicated in the unit of one-millionth of the volume An abbreviation for "Lower Explosion Limit." LEL refers to the lowest concentration of a combustible gas in air capable of causing explosion when ignited. An abbreviation for "Threshold Limit Value Time Weighted Average Limit.
Warranty Policy RIKEN KEIKI CO., LTD., warrants gas alarm equipment sold by us to be free from defects in materials, workmanship, and performance for a period of one year from date of shipment from RIKEN KEIKI CO., LTD., Inc. Any parts found defective within that period will be repaired or replaced, at our option, free of charge.
