SENKO SGT-P User manual

SGT-P
(Portable Single Gas Detector)
SGT-P: Replaceable
User’s Manual

SGT-P User’s Manual
Product Overview
SGT-P is a portable single gas detector designed to detect the presence of oxygen, toxic and
combustible gases in the ambient environment. SGT-P is the replaceable type of a gas sensor
and battery. When activated, SGT-P continuously monitors ambient air for the presence of a
specific gas and alerts the user to potentially unsafe exposure with LED, vibrating, and audible
alarms in the event that gas concentration exceeds alarm set points. And the alarm set point,
calibration range, and display configuration can be changed via SENKO-IR Link (Optional).
WARNING
Any unauthorized attempt to repair or modify the product, or any other cause of damage beyond the
range of the intended use, including damage by fire, lightening, or other hazard, voids liability of the
manufacturer.
Activate this product only if sensor, visual, detection, and audible cover are clear from contaminants such
as dirt and debris that could block the area where gas is to be detected.
Do not clean and rub the LCD screen of the products with a dry cloth or hands in hazardous environment to
prevent the static electricity.
Perform cleaning and maintenance of the products in fresh air that is free of hazardous gases Test
the response of a sensor regularly by the gas concentration exceeding alarm set point.
Test LED, audio and vibration manually.
Gas concentration measurements by the sensor can vary based on the environment (temperature,
pressure and humidity). Therefore, calibration of SGT-P should be performed in the same (or similar)
environment of the device’s actual use.
If the temperature changes sharply during use of the device (e.g., indoors vs outdoors), the value of the
measured gas concentration can suddenly change. Please use the SGT-P after the gas concentration
value has stabilized.
Severe vibration or shock to the device may cause a sudden reading change. Please use SGT-P after the
value of gas concentration has stabilized. Excessive shock to SGT-P can cause the device and/or
sensor to malfunction.
All alarm value is set based on the alarm standard that is required by international standard. Therefore,
alarm values should be changed only under the responsibility and approval of the administration of the
work site where the instrument is used.
Use IR communications in the safety zone which is free of hazardous gases.
Replace the battery and sensor in clean environment, which is free of hazardous gas.
CAUTION
Before operating this device, please read the manual carefully.
This device is not a measurement device, but a gas detector.
If calibration and self-test fails continuously, please do not use the device.
For the O2 detector, perform calibration every 30 days in the fresh air environment.
Before use, please check the activation date, and if the activation date is past, please do not use the device.
Clean detectors with a soft cloth and do not use chemical substances for cleaning.
To maintain 24 months lifetime, avoid the below activities except the necessary cases to check
events(Max/Min), lifetime/concentration, and alarm set points. Otherwise, the frequent use of the button will
deplete the battery lifetime less than 24 months.
1. Push the button frequently without valid reasons.
2. Frequent alarm operation or alarms are remained for a long time. *Normal Alarm Use: 1 time
and 2 minutes per day.
3. Connect with the SGT-P IR Link frequently except the bump testing.
View a serial number on the label at the back side of the device. (ex, 20170101)

SGT-P User’s Manual
1. The serial number indicates below.
ex) SG 01 01 001 2017(Year) 01(Months) 01(Day) 001(Manufacture Order)
Table Contents
1. Product Overview ………………………..……………………………..................… 4
2. Activation & Deactivation ……..…………………………..................…………….. 5
3. Mode …………………………………………………...........................................… 6
1) Measuring Mode ……………………………………………...................…. 6
2) Display Mode ……………………………………………...................………. 6
3) Alarm Activation & Setting Alarm Set Points ….………..….……....……… 6
4. Calibration …………………………………………………..................…………… 7
1) Fresh Air Calibration ……………………………………..................……….. 7
2) Remaining Calibration Day ………….……………………….............…….. 7
3) Standard Gas Calibration ……………….……………………….............….. 8
4) Return to Measuring mode ……………….……………………….............… 8
5. Self Test & Bump Test ………………………………………………..................… 9
6. Even Log ……………………………………………...................…………………… 10
7. Sensor & Battery Replacement …………………………………...................……. 10
8. Specification …………………………………………………..................………….. 11
9. Certification …………………………………………………..................………….… 12
Warranty …………………………………………………..................…………………. 13

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1. Product Overview
Alarm condition
Remaining
Month(Month)
Low Alarm Display
Remaining Calibration
Day
High Alarm Display Remaining Time(Hour)
Stabilization Success Max Peak Value
Stabilization Failure Min Peak Value
Fresh Air Calibration Measurement Unit
Standard Gas
Calibration
Remaining Battery Life
TWA Time Weight Average STEL Short Term Explosive
Limit

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IR Port
LCD display
Alarm LED
Buzzer
Button
Gas sensor
Gas Type
LCD Display Symbols

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2. Activation & Deactivation
< CAUTION >
Before use, check the manufacturing date on the box. Please do not open if it is
over the shelf life below.
Shelf Life
SGT-P-Oxygen: 6 months from the manufacturing date
SGT-P-Toxic: 6 months from the manufacturing date
In a safe environment, when pressing and holding the button for 3 seconds, gas type and firmware
version (ex. v2.2) will be displayed. For 10 seconds countdown, the device will be stabilized. After
stabilization is completed, the device will move to Measuring mode.
not be entered. In this case, contact authorized reseller or SENKO service center at 82-31-492-0445 for
repair / return information.
To deactivate the device, pleas press and hold the button for three seconds.
< CAUTION >
Always ensure that the device makes the proper detection response to the pertinent
gas. Verify that debris that could interfere with the detection of gas are not blocking
the area where gas is to be detected.
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In the event that stabilization of the device fails,
will appear on the display and Measuring mode will
OFF

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3. Mode
3.1. Measuring mode
• When activated, in Measuring mode, gas concentration will appear on
the screen.
• Oxygen concentration is displayed in percent by volume (%Vol) and toxic
concentration is displayed in parts per million. (PPM)
3.2. Display mode
In Measuring Mode, by pressing button for one second, the following ICONs will appear in order. Min
(only for oxygen) -> Max -> STEL value -> TWA value -> Clr Max -> Clr TWA/STEL -> 1st alarm set
point -> 2nd alarm set point -> STEL set point -> TWA set point -> Firmware version -> Remaining
Calibration Day -> Calibration. At the last step, if you press button or do not push any button for a
second, the device will return to Measuring Mode.
3.3. Alarm Activation (1st/2nd/TWA/STEL) & Setting Alarm set points
When the gas concentration exceeds alarm set points, or will be displayed and the device will
vibrate, flash (LED), and beep. To remove alarms, move to a clean air location. and then a gas
concentration will decrease, and alarm will stop.
To set the alarm setpoints, please follow the steps below.
For 1st & 2nd Alarm For TWA & STEL Alarm
- Press the button until the above alarm setpoint is displayed.
- Press and hold the button for three seconds and the first digit of alarm setpoint starts to blink.
- To increase the value, press the button for one second .
- To save the alarm setpoints, press the button for 3 seconds.
*Ensure that the second alarm set point must be greater than first alarm setpoint.
*Ensure Standard Factory alarm set points vary depending on countries, states, and companies.
Before changing alarm setpoints, please ensure the alarm set points are in compliance with your
local guidelines.
Alarm Set Points
Gas O2 CO H2S H2 SO2 NH3 NO2
1st 19% 30ppm 10ppm 100ppm 2ppm 25ppm 3ppm
2nd 23% 60ppm 15ppm 500ppm 5ppm 35ppm 5ppm
STEL n/a
200ppm 15ppm 500ppm 5ppm 35ppm 5ppm
TWA n/a
30ppm 10ppm 100ppm 2ppm 25ppm 3ppm

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SGT-P User’s Manual
4. Calibration
< CAUTION >
Initial calibration is performed on all devices prior to shipment. Once received, calibration should
be performed monthly (or quarterly) depending on frequency of use.
Fresh Air Calibration Standard Gas Calibration
4.1. Fresh Air Calibration
When pressing and holding the button for 5 seconds in the calibration mode( ), icon and
‘CAL’ mark will appear on the LCD.
And, press the button to initiate calibration for three seconds. When calibration begins, a countdown
(starting at 10) will appear on the screen.
Once completed, icon will appear on the LCD.
If calibration fails, icon will appear on the display. If this continues, please contact the sales
representative or SENKO service center.
4.2 . Remaining Calibration Day
If you set the calibration interval via IR LINK, the remaining day will be
displayed. To check the remaining day, press the button until the above image
is displayed.
The default
setting is “N/A”.
To activate the remaining calibration day, set an interval on the “Cal Interval(day)”
via IR LINK.

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< CAUTION >
Calibration should be performed in a fresh-air environment that is free for any influence of other
gases (since calibration is assumed to be performed in an environment with 20.9% of Oxygen).
It is also recommended that calibration should be performed in a space that is not confined.
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4.3. Standard Gas Calibration
When pressing and holding the button for 5 seconds in the calibration mode , icon and ‘CAL’
mark will appear, and when pressing button once again, icon will appear. And then, press and hold
the button for three second to initiate calibration. When calibration begins, a countdown (60 seconds or
more depending on sensor types) will appear on the screen.
To set the calibration setpoints, please follow the steps below.
- Press the button until the above calibration setpoint is displayed.
- Press and hold the button for three seconds and the first digit of calibration setpoint starts to blink.
- To increase the value, press the button for one second .
- To save the calibration setpoints, press the button for 3 seconds.
icon will appear several seconds on the display.
Then, the device will return to
icon will appear on the display. If this continues,
please contact the sales
, by pressing the button for a second, the fresh air calibration,
Once completed,
Measuring mode.
Once calibration fails,
representatives or SENKO service center.
In the standard calibration mode
4.4 . Return to Measuring Mode.

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standard calibration, and ESC will appear on the display consecutively. In the ESC mode, press the
button for 3 seconds, the device will be get out of the calibration mode. And press the button one
time, it will return Measuring mode.
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Calibration concentration.
Gas O2 CO H2S H2 SO2 Cl2 NH3 NO2
Concentration 0.0%Vol
(N2:99.9%Vol) 100 ppm 50 ppm 500 ppm 10 ppm 10 ppm 100 ppm 10 pm
5. Self Test & Bump Test
The default of Self-Test is N/A, and the interval is 8hr~20hr, or N/A. To initiate the self-test, please
set the self-test interval via the IR link. After the setting interval is activated, STS message will flash.
(The message will flash until users perform the Self-test.) Once you press the button, it will test
buzzer, LED, Vibration, LCD, 1ST alarm, and 2ND alarm. After the test is completed, END message
with icon will be displayed. (Users are required to check the test processes manually.)
5.2. Bump Test
The interval of Bump-test is 1~365days, and the default is N/A. To initiate the bump test, set the
bump test interval. Once the bump test time reaches, bts message will flash. Once you press and
hold the button for 3 seconds, the tst message will be displayed for 45 seconds (To cancel, press
the button for one second). Within the 45 seconds, apply a test gas (If no gases are applied, the bts
message will flash again). After the selected gas is applied, if the test is successful, SUC message
5.1 . Self Test

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with will be displayed after 30 seconds. And then, remove the calibration cap and gas tube. If
the test fails, FA message with will be displayed and bts message will be flashing until the test is
successful.
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6. Event Log
Last 30 events are stored on a device. Once more than 30 events are stored, the log events are
removed automatically in the order starting at Event 1. And, the stored log events data can be
transferred to SENKO-IR LINK. Each alarm event records followings:
- Types of alarms (1st or 2nd) / Alarm concentration in ppm or % / Peak concentration
7. Sensor & Battery Replacement
< CAUTION >
1. It is absolutely prohibited to replace battery at potential explosion or dangerous regions.
Replace the battery in a clean environment, which has no hazardous gases.
2. Replacement of components can invalidate the intrinsic safety function. Replacing the
sensor and battery should be performed by authorized sellers, agents, distributors, or
managers.
3. The sensors published by SENKO should be used for replacement. Product: Tekcell (SB-
AA02 3.6V) / Brand: Vitzrocell, Co.Ltd
4. Disassembly should be necessary only for sensors & battery replacement. After the
sensor replacement, the span gas calibration should be done.
5. Before disassembling, please turn off the power and remove screws.
7.1. Sensor Replacement
1. Deactivate the detector
2. Remove the 6 screws on the back case.
3. Remove the 2 screws on the PCB board.
4. After removing the battery, replace with the new sensor matching with the gas type. For instance, If
you have the SGT-P CO, the CO sensor should be used for the replacement.
5. Assemble the detector.
6. After assembling, perform the fresh air calibration and standard calibration with the concentration
in this manual.
6. Have the sensor stabilized for 5 minutes before use.
7.2. Battery Replacement
1. Deactivate the detector
2. Remove the 6 screws on the back case.
3. Replace with the new battery.
4. Assemble the detector.
5. After assembling, perform the fresh and standard calibration.
6. Before use, have the sensor stabilized for 5 minutes.

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8. Specification
Model SGT-P
Measure Gas O2 CO H2S H2 SO2 Cl2 NH3 NO2
Range 0~30%Vol 0~500ppm 0~100ppm 0~1000ppm 0~50ppm
0~20ppm 0~100ppm 0~20ppm
Sensor Type Electrochemical
Measurement Diffusion type
Display LCD display
Audible 90dB at 10cm
Warning
Lamp Red Flashing LEDs (Light-Emitting Diode)
Vibration Vibration Alarm
Battery Manufacture: Vitzrocell / P/N: SB-AA02(P) / System: Lithium Primary Battery
Nominal voltage: 3.6V / Nominal capacity: 1.2Ah
Temperature
& Humidity -40℃ ~ +50℃(for Toxic) / -35℃ ~ +50℃(for
O2) 5% ~ 95% RH (non-condensing)
Case Rubber Enclosure
Accessories
Calibration Cap, Manual, Test Report
Option External Sampling Pump (SP-Pump101), SENKO-IR Link, Docking Station
Size &
Weight Size: 54mm(W) x 91mm(H) x 32mm(D)/
Weight: 93g(Toxic), 104g(O2) (Battery, clip included)
Operating
Life 24 months, based on 2 minutes of alarm per day
Event Log Recent 30 alarms
Approval Ex ia IIC T4 Ga/ IP67 (Korea Ex, ATEX, IECEx, INMETRO)

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9. Certificates
Intrinsic Safety:
The detector is in conformity of the following standards
IECEx: Ex ia IIC T4 Ga
① ② ③ ④ ⑤
IECEx KTL
19.0019X
① Explosion Protected
② Protection Concept
③ Gas Group
④ Temperature
Classification ⑤ Equipment
Protection level
ATEX: 2198 II 1 G Ex ia IIC T4 Ga IP67
KRH 19 ATEX 1022X
Directive 2014/34/EU
KCS: Ex ia IIC T4
KTL 19-KA2BO-0491X
INMETRO : Ex ia IIC T4 Ga
BRA-19-GE-0022X
Compliance: Electromagnetic Compatibility Directive 2014/30/EU
Standards:
The electrical apparatus and any acceptable variations to it specified in the schedule of this
certificate and the identified documents, was found to comply with the following standards:
• IEC 60079-0: 2011 Ed. 6
• IEC 60079-11: 2011 Ed 6
• IEC 60079-26 : 2014-10 Ed 3
• EN 60079-0: 2012+A11:2013 • EN 60079-11: 2012
Manufacturing Approval:
The detector manufacturer is certified compliant with ISO 9001:2000 provisions
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Limited Warranty
SENKO warrants this product to be free of defects in workmanship and materials-under normal use
and service for two years from the date of purchase from the manufacturer or from the product’s
authorized reseller.
The manufacturer is not liable (under this warranty) if its testing and examination disclose that the
alleged defect in the product does not exist or was caused by the purchaser’s (or any third party’s)
misuse, neglect, or improper installation, testing, or calibrations. Any unauthorized attempt to repair
or modify the product, or any other cause of damage beyond the range of the intended use,
including damage by fire, lightening, water damage or other hazard, voids liability of the
manufacturer.
In the event that a product should fail to perform up to manufacturer specifications during the
applicable warranty period, please contact the product’s authorized reseller or SENKO service
center at [phone] or email [e-mail] to repair/return information.
22655 Skywest Dr. Hayward, CA 94541, USA
Email : [e-mail]
Web : www.senkousa.com
Phone: [phone]