Riken Keiki GP-1000 User manual

PT0E-1204
Portable
Combustible Gas Detector
GP-1000
Operating Manual
(PT0-120)

Safety information
The Combustible Gas Monitor Model GP-1000 is a gas monitor designed to provide continuous
monitoring of exposure to combustible gas in hazardous areas.
The measuring range of GP-1000 is 0-100%LEL
The gas sample is sucked in by built-in micro pump.
Power supply is only with four series connected Alkaline Manganese AA batteries , type LR6
manufactured by TOSHIBA.
Battery exchange in a hazardous area is not performed.
Specification for safety
・Ex ia IIC T4 Ga
・Ambient temperature range ：-20°C to +50°C
Electrical data
・Powered by four series AA size alkaline batteries, type LR6 by TOSHIBA.
Certificate numbers
・IECEx Certificate number ：IECEx DEK 13.0090
・ATEX Certificate number ： DEKRA 13 ATEX 0227
List of standards
・IEC 60079-0：2011 ・EN60079-0:2012+A11:2013
・IEC 60079-11：2011 ・EN60079-11:2012
・IEC 60079-26：2006 ・EN60079-26:2007
WARNING
・Do not replace dry batteries in hazardous location.
・Do not attempt to disassemble or alter the instrument.
･Use only alkaline AA batteries, type LR6 manufactured by TOSHIBA.
･Use only backup battery type CR1220 manufactured by Maxell.
INST. No. 0 0 0 0 0 0 0 0 0 0 0
AB C D E
A: Manufacturing year (0-9)
B: Manufacturing month (1-9,XYZ for Oct.-Dec.)
C: Manufacturing lot
D: Serial number
E: Code of factory
・ II 1G Ex ia IIC T4 Ga
Phone : [phone]
Fax : [phone] GIII
E-mail : [e-mail]
Web site : http://www.rikenkeiki.co.jp

GP-1000 - 2 -
<Contents>
1. Outline of the Product.............................................................................................. 3
1-1. Preface .................................................................................................................... 3
1-2. Purpose of use ........................................................................................................ 3
1-3. Definition of DANGER, WARNING, CAUTION, and NOTE ..................................... 3
2. Important Notices on Safety .................................................................................... 4
2-1. Danger cases .......................................................................................................... 4
2-2. Warning cases......................................................................................................... 5
2-3. Precautions ............................................................................................................. 6
3. Product Components............................................................................................... 8
3-1. Main unit and standard accessories ........................................................................ 8
3-2. Names and functions for each part.......................................................................... 9
4. How to Use.............................................................................................................. 12
4-1. Before using the gas detector.................................................................................. 12
4-2. Preparation for start-up............................................................................................ 12
4-3. How to start the gas detector................................................................................... 15
4-4. How to detect .......................................................................................................... 19
4-5. Modes...................................................................................................................... 22
4-6. Display mode........................................................................................................... 26
4-6-1. Entering display mode............................................................................................. 26
4-6-2. Concentration displayed gas reading setting........................................................... 27
4-6-3. Alarm setpoint display ............................................................................................. 29
4-6-4. Pump suction volume setting................................................................................... 30
4-6-5. Log data display ...................................................................................................... 31
4-7. User mode............................................................................................................... 32
4-7-1. Entering user mode ................................................................................................. 32
4-7-2. Peak bar display setting .......................................................................................... 34
4-7-3. Date/time setting ..................................................................................................... 35
4-8. Calibration mode ..................................................................................................... 36
4-8-1. Entering calibration mode........................................................................................ 36
4-8-2. Bump test ................................................................................................................ 38
4-8-3. Air calibration........................................................................................................... 39
4-8-4. AUTO CAL .............................................................................................................. 40
4-8-5. ONE CAL................................................................................................................. 42
4-8-6. Bump test condition setting ..................................................................................... 43
4-8-7. Password setting ..................................................................................................... 44
4-9. Power-off ................................................................................................................. 45
5. Operations and Functions ....................................................................................... 46
5-1. Gas alarm activation................................................................................................ 46
5-2. Fault alarm activation .............................................................................................. 48
6. Maintenance............................................................................................................ 49
6-1. Maintenance intervals and items ............................................................................. 49
6-2. How to clean............................................................................................................ 50
6-3. Replacement of consumables ................................................................................. 51
6-4. Air calibration........................................................................................................... 52
6-5. Span calibration....................................................................................................... 52
7. Storage and Disposal .............................................................................................. 53
7-1. Procedures to store the gas detector or leave it for a long time .............................. 53
7-2. Procedures to use the gas detector again ............................................................... 53
7-3. Disposal of products................................................................................................ 53
8. Troubleshooting....................................................................................................... 55
9. Product Specifications ............................................................................................. 57

1 Outline of the Product 1-1. Preface
- 3 - GP-1000
1
Outline of the Product
1-1. Preface
Thank you for choosing our portable combustible gas detector GP-1000 (hereinafter referred to as the gas
detector). 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 detector and its specifications. It contains information required for
using the gas detector properly. Not only the first-time users but also the users who have already used the
product must read and understand the operating manual to enhance the knowledge and experience before
using the gas detector.
1-2. Purpose of use
This product is used to detect combustible gases (% LEL) in the air.
It provides two different specifications for target combustible gases: "general combustible gases (HC)" used
in ordinary factories, oil tankers, etc. and "methane (CH4)" such as city gas and natural gas.
Detection results are not intended to guarantee life or safety in any way.
1-3. Definition of DANGER, WARNING, CAUTION, and
NOTE
DANGER This message indicates that improper handling may cause serious damage on
life, health or assets.
WARNING This message indicates that improper handling may cause serious damage on
health or assets.
CAUTION This message indicates that improper handling may cause minor damage on
health or assets.
NOTE This message indicates advice on handling.

2 Important Notices on Safety 2-1. Danger cases
GP-1000 - 4 -
2
Important Notices on
Safety
2-1. Danger cases
DANGER
About explosion-proof
Do not modify or change the circuit or structure, etc.
When using the gas detector in a hazardous area, take the following countermeasures for
preventing dangers resulting from electrostatic charges.
(1) Wear anti-static clothes and conductive shoes (anti-static work shoes).
(2) For indoor use, use the gas detector while standing on a conductive work floor (with a
leakage resistance of 10 MΩor less).
The specifications of the gas detector are as follows:
6.0 VDC (Toshiba LR6)
Ambient temperature: -20 to 50ºC
About use
While conducting measurement in a manhole or confined space, do not lean over or look into
the manhole or closed space. It may lead to dangers because oxygen-deficient air or other
gases may blow out.
High-concentration (100% LEL or higher) gases may be discharged from the gas exhausting
outlet. Never use fire near the gas detector.

2 Important Notices on Safety 2-2. Warning cases
- 5 - GP-1000
2-2. Warning cases
WARNING
Sampling point pressure
The gas detector 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
detector, detected gases may leak out from its inside and may cause dangerous conditions. Be
sure that excessive pressure is not applied to the gas detector while used.
Do not connect the gas sampling hose directly to a location with a pressure higher than the
atmospheric pressure. The internal piping system may be damaged.
Air calibration in atmosphere
When the air calibration is performed in the atmosphere, check the atmosphere for freshness before
beginning the air calibration. If other gases exist, the adjustment cannot be performed properly, thus
leading to dangers when the gas leaks.
Response to gas alarm
Issuance of a gas alarm indicates that there are extreme dangers. Take proper actions based on your
judgment.
Battery level check
Before use, check that there remains sufficient battery power. When the gas detector is not
used for a long period, the batteries may be exhausted. Replace them with new ones before
use.
If a low battery voltage alarm is triggered, gas detection cannot be conducted. If the alarm is
triggered during use, turn off the power and promptly replace the batteries in a non-hazardous
area.
Others
Do not throw the gas detector into fire.
Do not wash the gas detector in a washing machine or ultrasonic cleaner.
Do not block the . No alarm sound can be heard.
Do not remove the battery while the power is on.

2 Important Notices on Safety 2-3. Precautions
GP-1000 - 6 -
2-3. Precautions
CAUTION
Do not use the gas detector where it is exposed to oil, chemicals, etc. Do not submerge the gas
detector under water on purpose.
Do not use in a place where the gas detector is exposed to liquids such as oil and chemicals.
The gas detector, being compliant to IP67, is not water-pressure-resistant. Do not use the gas
detector where a high water pressure is applied to it (under a faucet, shower, etc.) or submerge
it under water for a long time. The gas detector is water-proof only in fresh water and running
water, and not in hot water, salt water, detergent, chemicals, human sweat, etc.
The gas inlet and outlet are not water-proof. Be careful not to let water such as rainwater get
into these parts. Because this may cause trouble and gas cannot be detected.
Do not place the gas detector where water or dirt gets accumulated. The gas detector placed at
such a location may cause malfunction due to water or dirt that gets into the buzzer opening,
etc.
Note that drawing in dirty water, dust, metallic powder, etc. will significantly deteriorate the
sensor sensitivities. Be careful when the gas detector is used in an environment where these
elements exist.
Do not use the gas detector in a place where the temperature drops below -20ºC or rises over 50ºC.
The operating temperature of the gas detector is -20 to 50ºC. Do not use the gas detector at
higher temperatures, humidities, and pressures or at lower temperatures than the operating
range.
Avoid long-term use of the gas detector in a place where it is exposed to direct sunlight.
Do not store the gas detector in a sun-heated car.
Observe the operating restrictions to prevent condensation inside the gas detector or gas sampling
hose.
Condensation formed inside the gas detector or gas sampling hose causes clogging or gas
adsorption, which may disturb accurate gas detection. Thus, condensation must be avoided. In
addition to the operating environment, carefully monitor the temperature/humidity of the sampling
point to prevent condensation inside the gas detector or gas sampling hose. Please observe the
operating restrictions.
Do not use a transceiver near the gas detector.
Radio wave from a transceiver near the gas detector may disturb readings. If a transceiver is
used, it must be used in a place where it disturbs nothing.
Do not use the gas detector near a device that emits strong electromagnetic waves
(high-frequency or high-voltage devices).
Verify that the pump driving indicator is rotating before using the gas detector.
If the pump driving indicator is not rotating, gas detection cannot be performed properly. Check
whether the flow rate is lost.
Never fail to perform a regular maintenance.
Since this is a safety unit, a regular maintenance must be performed to ensure safety. Continuing to
use the detector without performing a maintenance will compromise the sensitivity of the sensor, thus
resulting in inaccurate gas detection.

2 Important Notices on Safety 2-3. Precautions
- 7 - GP-1000
CAUTION
Others
Pressing buttons unnecessarily may change the settings, preventing alarms from activating
correctly. Operate the gas detector using only the procedures described in this operating
manual.
Do not drop or give shock to the gas detector. The accuracy of the gas detector may be
deteriorated.
Do not jab the buzzer opening with a sharp-pointed item. Doing so may cause a failure or
damage.
Do not remove the panel sheet on the display. The water-proof and dust-proof performances
will be deteriorated.
Do not affix a label on the infrared port. Infrared communications can no longer be conducted.
The operating environment may include gases that have harmful effects on the sensor of the
gas detector. The gas detector cannot be used in the presence of the following gases:
(1) Sulfides (such as H2S and SO2) continuously existing in high concentrations
(2) Halogen gases (such as chloride compounds and chlorofluorocarbons)
(3) Silicone (Si compounds)
Do not use the gas detector in the presence of the above gases (such as high-concentration
sulfides, halogen gases and silicone), which may shorten the sensor life significantly or cause
malfunctions such as inaccurate readings.
In case the gas detector is used for detection in the presence of silicone, etc., be sure to check
the gas sensitivities before using it again.

3 Product Components 3-1. Main unit and standard accessories
GP-1000 - 8 -
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.
<Main Unit>
<Standard Accessories>
Name Appearance Quantity Name Appearance Quantity
AA
Alkaline dry battery
4 pcs
(installed) Hand strap
1
Gas sampling
probe
and gas sampling
hose
1
Operating
manual ―1
Product
warranty ―1

3 Product Components 3-2. Names and functions for each part
- 9 - GP-1000
3-2. Names and functions for each part
<Appearance> (main unit)
No. Name Function
(1) LCD display Displays gas concentrations, measured gas name, alarms, etc.
(2) Buzzer sound opening Emits operation and alarm sounds. (Do not block it.)
(3) Alarm lamp window Blinks (in red) in response to an alarm.
(4) Calibration/▲button Keep this switch pressed to perform fresh air adjustment.
(5) ALARM reset/▼button When an alarm occurs, press this switch to reset the alarm.
(6) Display switching
button
Press this switch to change between display modes.
(7) Power/set button Turns the power ON/OFF.
(8) Gas inlet Connect a gas sampling hose to this port.
(9) Gas outlet Exhausts the gas drawn into the gas detector. (Do not block it.)
(10) Lock plate Retains the battery cover.
(11) Battery cover Protects the battery.
(1) LCD displa
y
(8) Gas inlet
(9) Gas outlet
(11) Battery cover
(10) Lock plate
(2) Buzzer sound
opening
(3) Alarm lamp
window
(6) Display
switching
button
(7) Power/
set button
(4) Calibration/▲
button
(5) Alarm reset/▼
button

3 Product Components 3-2. Names and functions for each part
GP-1000 - 10 -
<LCD Display>
No. Name Function
(1) Operating state display Displays the operating status in the detection mode. Normal: Blinking
(2) Flow check display Displays the drawing status. Normal: Rotating
(3) Range mode display Displays Lo/Hi/Auto icon of range mode.
(4) Battery level icon Displays a reference of the battery level.
(5) Gas name display Displays detected gas name.
(6) Concentration and unit
display
Displays gas concentration and unit.
(7) Full scale and bar
display
Displays the level of gas concentration with the bar meter as well as
the full scale value.
(8) Clock display Displays the current time.
NOTE
The meanings of battery level icons are as follows:
: Sufficient / : Low / : Needs replacement If the battery level is lower than the above,
the inside of the battery icon starts to blink ( ).
NOTE
Range mode display icons
Lo : Fixed to the low range (0-10.0% LEL)
Hi : Fixed to the high range (0-100% LEL)
Auto : Automatic switch from the low range to high range
(1) Operation
display
(2) Flow display
(3) Range mode
display
(4) Battery level icon
(5) Gas name
display
(6) Concentration
and unit display
(7) Full scale and
bar display
(8) Clock display

3 Product Components 3-2. Names and functions for each part
- 11 - GP-1000
<Appearance> (Gas sampling probe and gas sampling hose)
No. Name Function
(1) Gas sampling probe Placed in a detection area to collect a gas.
The probe includes a dust filter.
(2) Gas sampling hose A resin hose through which the sampled gas passes.
(3) Hose clamp coupler A joint that connects with the main unit.
(3) Hose
clamp coupler
(1) Gas sampling probe
(2)Gas sampling hose

4 How to Use 4-1. Before using the gas detector
GP-1000 - 12 -
4
How to Use
4-1. Before using the gas detector
Not only the first-time users but also the users who have already used the gas detector must follow the
operating precautions.
Ignoring the precautions may damage the gas detector, resulting in inaccurate gas detection.
4-2. Preparation for start-up
Before starting gas detection, check the followings.
Check that the protective film attached on the display from shipping is removed.
The batteries are installed (with sufficient battery level).
The dust filter is not contaminated.
The gas sampling probe is not loose.
The hose clamp coupler is connected securely.
<Installing and Replacing Batteries>
When the gas detector is used for the first time, or when the battery level is low, attach new AA alkaline
batteries according to the following procedures.
CAUTION
Turn off the power of the gas detector before replacing the batteries.
Replace the batteries in a non-hazardous area.
Replace all of the four batteries with new ones at one time.
Pay attention to the polarities of the batteries.
If the battery cover is not completely locked, the dry batteries may drop off or water may get in
through the clearance. Water may also get in if a minute foreign substance is caught beneath
the batter
y
unit.
CAUTION
The display is covered by the protective film to prevent scratches from shipping.
Be sure to remove this film before use.
Gas monitor with this film will not satisfy the explosion-proof performance.

4 How to Use 4-2. Preparation for start-up
- 13 - GP-1000
(1) Check that the power of the gas detector is turned off. * Turn off the power if it is turned on.
(2) Release the lock and open the battery cover.
(3) Remove old batteries and then put new batteries while observing the correct polarity.
(4) Close the battery cover and lock it. * The lock clicks.
<Gas Sampling Probe Maintenance>
Check the dust filter inside the gas sampling probe visually.
Check that the dust filter is not contaminated.
Dust Filter Replacement Procedure
If the dust filter is contaminated, replace it following the procedure below.
(1) Hold the middle section (filter case) of the gas sampling probe and remove the tip section by turning it
counterclockwise.
(2) Remove the contaminated dust filter from the middle section (filter case) and then put a new filter.
*There are no differences between the front and back sides of the dust filter.
(3) Connect the tip section by turning it clockwise.
* Tighten it securely. Loose connection may cause a leak.
* Tighten it by hand
Release the
lock
Open the
cover
Put new batteries
while observing
correct polarity
Remove the contaminated dust filter from
the middle section (filter case) and then
put a new filter.
Remove the tip section of the gas
sampling probe.
The middle section The tip section

4 How to Use 4-2. Preparation for start-up
GP-1000 - 14 -
<Assembly>
Connect the gas sampling probe to the main unit as shown in the following figure.
* Insert the hose clamp coupler into the gas inlet of the main unit while pulling the release ring, and then
release the release ring.
Release ring
(hose clamp coupler)
Main unit

4 How to Use 4-3. How to start the gas detector
- 15 - GP-1000
4-3. How to start the gas detector
<Power-on>
Press and hold the POWER button until the buzzer blips (one second or longer) to turn on the power.
When the power is turned on, the LCD display changes automatically as shown below, and the gas detector
enters the detection mode.
Press and hold the POWER
button for one second or longer.
LCD Display
All LCDs Light Up.
(Buzzer sound: Once <blip>)
↓
Date/time display
Display example:
June 01, 2014
8:30
↓
Battery voltage display
Alarm type display
Display example:
6.0V
AL-H (<Self-latching>)
*Alarm type
AL-H (Alarm-Hold
<Self-latching>)
AL-A (Alarm-Auto
<Auto-reset>)
↓
Gas display
Display example:
CH4

4 How to Use 4-3. How to start the gas detector
GP-1000 - 16 -
↓
Full scale display
Display example:
100%LEL
↓
WARNING setpoint display
Display example:
10%LEL
↓
ALARM setpoint display
Display example:
50%LEL
↓
Detection mode
(Buzzer sound: Twice <blip, blip>)
NOTE
The range mode used at the last power off is retained.

4 How to Use 4-3. How to start the gas detector
- 17 - GP-1000
<Basic Operating Procedures>
Normally, the detection mode is activated after the power is turned on.
NOTE
Of the fault alarms, only the low flow rate alarm "FAIL - LOW FLOW" can be reset by pressing the
RESET button after removing the cause of low flow rate. For other fault alarms, turn off the power and
then promptly contact RIKEN KEIKI for repair.
The backlight goes off after 20 seconds or so of no operation. It lights up continuously while an alarm is
activated.
<<Snap Logger Mode>>
<<Detection Mode>>
LCD Display
<<Display Mode>>
<<Gas Alarm>>
<<Fault Alarm>>
<<Air Calibration Mode>>
Operate AIR button
Operate RESET button
Operate DISPLAY button
*For fault alarms other
than "FAIL - LOW
FLOW" and "Fail -
CLOCK", turn off the
power and contact
RIKEN KEIKI for repair.
<<Calibration Mode>>
Operate ▼and ▲buttons Operate ▼and DISPLAY buttons
Operate RESET button

4 How to Use 4-3. How to start the gas detector
GP-1000 - 18 -
<Performing Air Calibration>
Perform air calibration at maintenance before starting work or if the zero point deviates even though fresh
air is drawn.
* Before performing air calibration, check that the surrounding air is fresh.
LCD Display
(1) Press and hold the AIR button
in the detection mode.
[AIR]
(2) Release the AIR button when
the display changes from "AirCL -
HOLD AIR" to "AdJ - RELEASE".
(Buzzer sound: Three times <blip,
blip, blip>)
↓
↓
The zero adjustment is done and
the gas detector returns to
detection mode.
(Buzzer sound: Once <blip>)
* If air calibration fails, "FAIL
- AIR CAL" is displayed.
Press the RESET button
to reset the alarm. The gas
detector returns to the
detection mode (before
adjustment).
NOTE
Perform air calibration under pressure and temperature/humidity conditions close to those in the
operating environment and in fresh air.
Perform air calibration after the reading is stabilized.
If there is a sudden temperature change of 15℃or more between the storage and operation locations,
turn on the power of the gas detector, leave it for about ten minutes in a similar environment to the
operation location, and perform air calibration in fresh air before using it.

4 How to Use 4-4. How to detect
- 19 - GP-1000
4-4. How to detect
<Reading Display>
When the preparation for start-up and air calibration have been completed, put the probe close to the
detection area in the detection mode and perform gas detection.
Reading display (example)
CH4 concentration : 0.0% LEL
Detection range: 0-10.0% LEL (Low RANGE)
Range mode: Automatic switching (Auto)
Battery level: Low
Time: 18 minutes past eight in the evening
DANGER
While conducting measurement in a manhole or confined space, do not lean over or look into
the manhole or closed space. It may lead to dangers because oxygen-deficient air or other
gases may blow out.
Oxygen-deficient air or other gases may blow out from the gas exhausting outlet. Never inhale
the air or gases.
High-concentration (more than LEL) gases may blow out. Never use fire near the gas detector.
WARNING
The gas detector 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
detector, detected gases may leak out from its inside and may cause dangerous conditions. Be
sure that excessive pressure is not applied to the gas detector while used.
Do not connect the sampling hose directly to a location with a pressure higher than the
atmospheric pressure. The internal piping system may be damaged.
When the fresh air adjustment is performed in the atmosphere, check the atmosphere for
freshness before beginning the adjustment. If other gases exist, the adjustment cannot be
performed properly, thus leading to dangers when the gas leaks.
Issuance of a gas alarm indicates that there are extreme dangers. Take proper actions based
on your judgment.
Before use, check that there remains sufficient battery power. When the gas detector is not
used for a long period, the batteries may be exhausted. Replace them with new ones before
use.
If a low battery alarm occurs, gas detection cannot be conducted. If the alarm is triggered
during use, turn off the power and promptly replace the batteries in a non-hazardous area.
Do not block the buzzer sound opening. No alarm sound can be heard.