airmet T40-II Portable Single Gas Monitor Owner’s Manual

: September 14, 2024
: airmet

Table of Contents

airmet T40-II Portable Single Gas Monitor
Product Usage Instructions
FAQ
Certifications
Product Overview
Product Specifications
Operation and Instructions
Operation instructions
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Download This Manual (PDF format)

airmet T40-II Portable Single Gas Monitor

Product Usage Instructions

Before operating the T40 II single gas monitor, ensure you have read and understood the manual for maximum safety and performance.
Only replace the battery with RAMWAY ER14335 batteries. Do not replace the battery when an explosive atmosphere is present.
Regularly check sensor water barriers for obstructions, contamination, or damage. Contact after-sales service for replacements if needed to ensure accurate gas concentration readings.
Operate, service, and change the battery cell in nonhazardous locations. Do not use the monitor in oxygen-enriched atmospheres.
If the unit is working abnormally, contact your service representative immediately for assistance.

FAQ

Q: What type of batteries should I use for the T40 II single gas monitor?
A: Use only RAMWAY ER14335 batteries for the T40 II single gas monitor.
Q: Where should I operate and service the monitor?
A: Operate, service, and change the battery cell of the monitor only in non-hazardous locations.
Q: What should I do if I suspect abnormal operation of the unit?
A: Contact your service representative immediately if you suspect abnormal operation of the unit.

Certifications

Directive or CB| Area Classifications| Approved Temperature Range| Standards
---|---|---|---
IECEx| Ex ia IIC T4 Ga Ex ia I Ma| -40 °C to +50 °C

-40 °F to +122 °F

| IEC 60079-0:2017 Ed.7.0

IEC 60079-11:2011 Ed.6.0

ATEX| Ex ia IIC T4 Ga Ex ia I Ma| -40 °C to +50 °C

-40 °F to +122 °F

| EN IEC 60079-0:2018

EN 60079-11:2012

UL| Class I, Division 1, Groups A, B, C, D T4

Class I, Zone 0, AEx ia IIC T4 Ga

| -40 °C to +50 °C

-40 °F to +122 °F

| ANSI/UL 60079-0-2020 Ed.7

ANSI/UL 60079-11-2018 Ed.6

ANSI/UL 913-2019 Ed.8

UL 61010-1 3rd Edition (2012),

AMD1: 2018

CSA| Ex ia IIC T4; Class I, Division 1, Groups A, B, C, D T4| -40 °C to +50 °C

-40 °F to +122 °F

| CAN/CSA C22.2 No. 60079-0:19 CAN/CSA-C22.2

No. 60079-11:14 (r2018) CAN/CSA C22.2 No.61010-1-12, UPD1: 2015, UPD2: 2016,

AMD1: 2018

China Ex| Ex ia IIC T4 Ga| -40 °C to +50 °C

-40 °F to +122 °F

| GB/T 3836.1- 2021

GB/T 3836.4- 2021

GB/T 4208-2017

China MA| Ex ia I Ma| -20 °C to +40 °C

-4 °F to +104 °F

| MT 703-2008 Q/JT07-2022 GB/T 3836.1-2021

GB/T 3836.4-2021

China CPA| Metrological| -10 °C to +40 °C

14 °F to +104 °F

| JJF 1363-2019

JJF 1421-2013

Warnings and cautionary statements

For maximum safety and optimal performance, read and understand the manual before operating or servicing the unit. Failure to perform certain procedures or note certain conditions may impair the performance of this product.
For safety reasons, this equipment must be operated and serviced by qualified personnel only. Customer site assembly is not recommended, improper disassembly may reduce the performance of the instrument.
Substitution of components may impair intrinsic safety and may cause an unsafe condition.
DO NOT REPLACE BATTERY WHEN AN EXPLOSIVE ATMOSPHERE IS PRESENT. USE ONLY RAMWAY ER14335 BATTERIES.
Before use, ensure that the ESD film on the LCD and label is not damaged or peeling.
Obstruction of sensor openings–due to dust, dirt, water, or another cause–can inhibit the unit’s ability to measure gas concentrations accurately. When this occurs, readings may appear lower than the actual gas concentration. Keep sensor openings clean, dry, and properly exposed to the ambient air.
Obstructed, contaminated, or damaged sensor water barriers (or their gaskets) can inhibit the unit’s ability to measure gas concentrations accurately. When this occurs, readings may appear lower than the actual gas concentration. Contact after-sales service to replace the sensor water barriers and gaskets as needed.
Service the unit, use its communications port, and change its battery cell only in non-hazardous locations. Not for use in oxygen-enriched atmospheres.
Contact your service representative immediately if you suspect that the unit is working abnormally.

Product Overview

T40 II single gas monitor is compact, easy to carry and use.
It is specially designed to detect the concentration of toxic and oxygen gases, and is mainly used in the Petrochemical industry and coal mines.
The monitor can continuously monitor the concentration of harmful gas in the surrounding environment, once the gas concentration reaches the low and high alarm and TWA/STEL alarm preset values, T40 II will produce sound, light and vibration alarms.

Product Specifications

0-2000 ppm

| Hydrogen Sulfide(H2S) 0-100 ppm

0-200 ppm

0-500 ppm

Depending on operating conditions; the amount of time the unit is in alarm; and the enablement of unit’s confidence indicator.
ppm please refer the 4.1 gas unit description.
Operating temperatures below -20° C may cause reduced instrument accuracy and affect display and alarm performance.

Hardware Overview

Operation and Instructions

The table below list Industrial Scientific’s minimum frequency recommendations for each program. These recommendations are based on site data, safe work procedures, industry best practices and regulatory standards to help ensure worker safety. Users can reduce the frequency of the following procedures as appropriate according to the safety policy of the local government or company, Industrial Scientific is not responsible for developing security practices and policies.

Procedure	Recommended minimum frequency
Configuration	Before first use, when there is a change in the installed

sensor type, and as otherwise needed.
Calibration| Before first use and at least 6-month interval, depending on use and exposure to gas and contamination, such as vibration, drop or sensor replacement, multiple high-concentration gas shocks, etc.
Bump test| Before each day’s use.

Display Overview
The visual test screen depicted right shows all the indicators that can appear on the display screen. Each indicator is stationary and appears only when relevant to the task being performed.

Display screens, indicators, and abbreviations

Status indicators

Instruments work normally.
Instrument failure.
The unit is in configuration mode.

Alarm indicators

The alarm icon is used in combination with other indicators to communicate a variety of conditions.
High-level gas alarm.
Low-level gas alarm.
STEL alarm.
TWA alarm
Positive over-range gas alarm.
Negative over-range gas alarm.
Low-battery alarm.

Process and time-based indicators

The zero icon is used in combination with other indicators to communicate sensor zero information.
The bump test icon is used in combination with other indicators to communicate bump test information.
The calibration icon is used in combination with other indicators to communicate calibration information.
The peak reading is the highest detected gas reading. Always clear the peak reading after calibration.
A process is in progress. In configuration mode, indicates a time-based setting (e.g. bump test response time).

Gas name and unit-of-measure abbreviations

Carbon Monoxide (CO)
Hydrogen Sulfide (H2S)
Percent by volume refers to a defined amount of gas in 100 parts of air.
Parts per million is the unit of measure for CO and H2S, PPM is the volume ratio in describing the gas concentration, 1ppm=10-6 equivalent to 1umol/mol.

Other abbreviations

Vibration alarm enabled.
Short-term exposure limit, default time 15 minutes. Display variations: “STEL”
Time-weighted average. default time 8h. Display variations: “TWA”

Start-up, Shutdown and Always on Start-up
Press and hold the for 3 seconds, the instrument starts to power on. After powering on, the instrument automatically enters the visual test, firmware version, 20-second countdown and the second visual test screen, and is accompanied by warning sound and light test. After a short warm-up, it will automatically enter the real-time gas monitoring screen.

Shutdown and always on

Press and hold for five seconds. After a five-second countdown: The instrument powers off if;
- the always-on feature is disabled or
- the always-on feature is enabled and the security code is set to 000.
If this screen is activated, the shutdown process is security-code protected. To complete shutdown, the user must enter the correct three-digit code.
Value range: 000 to 999

Configuration mode
Configuration mode can only be accessed during startup, at the 20-second countdown screen, press and hold both buttons simultaneously to enter configuration mode, and select alarm and warning-related options that maximize safety within the air sampling environment. When the unit is in configuration mode, the following apply:

The tool icon ( ) is displayed in the lower right corner of each screen.
With successive short presses of the on-off button( ), the user can scroll through the configuration loop.
The enter button ( ) is used to start the editing process or initiate zero.
When editing a value, the enter button ( ) increments the value and the on-off-mode button ( ) saves the value.
When editing a value, once the last value in the range is reached, the display starts again with the first value.
When buttons ( ) is pressed and held more than 1 seconds, the unit leaves configuration mode; it enters operation mode and the home screen is activated.
Unless otherwise noted, when no button is pressed for 30 seconds, the unit enters operation mode and the home screen is activated.
Any changes made in configuration mode are automatically saved to the unit and take effect immediately.

Configuration instructions

Buttons or Screen

Button effects or Screen Description
Saves the currently displayed value or activates the next configuration mode screen.
Increase value or First press activates the value. Continued presses increment the value; hold to speed the increment pace.

Initiate zero

This screen allows the technician to complete the zero and calibration processes from configuration mode.
Note: O2 instrument display initiates calibration (Zero is the calibration of O2).

Low gas alarm setpoint

This screen features the status, low alarm, sensor type, and configuration icons, with the alarm’s current setpoint and unit of measure. Edit the alarm setpoint based on the following:
Value range = starts at minimum sensor measurement resolution, and ends at the high gas alarm setpoint value.
Value increment = sensor measurement resolution

High gas alarm setpoint

This screen features the status, high alarm, sensor type, and configuration icons, with the alarm’s current setpoint and unit of measure. Edit the alarm setpoint based on the following:
Value range = starts at low gas alarm setpoint value, and ends at the highest measurement range value of the sensor.
Value increment = sensor measurement resolution
TWA alarm setpoint (O2 instrument without this screen)
This screen features the status, alarm, sensor type, configuration, and TWA icons, with the alarm’s current setpoint and unit of measure. The alarm setpoint can be edited.
Value increment = within the sensor measurement resolution
STEL alarm setpoint (O2 instrument without this screen)
This screen features the status, alarm, sensor type, configuration, and STEL icons, with the current setpoint. The alarm setpoint can be edited.
Value increment: sensor measurement resolution

Calibration gas

This screen features the status, sensor type, configuration, and calibration icons, with the current calibration gas setting in the main area.
This setting reflects the concentration of calibration gas that the instrument expects to read when calibrated; it should be edited to match the cylinder’s gas concentration.
Value range: within the sensor measurement range
Value increment: sensor measurement resolution

Confidence indicator
This screen features the status, alarm, and configuration icons, with the selected setting value displayed in the main area. The technician can disable or enable the indicator and choose the indicator type.
When enabled, the unit will emit the selected signal every 90 seconds in operation mode.
Note: When options 1, 2, or 3 are selected, the expected battery life will be reduced.
Values:

0 = disabled
1 = audible chirp enabled
2 = LED flash enabled
3 = audible chirp and LED flash enabled

Operation-mode bump test
This screen features the status, lock, configuration, and bump test icons, with the selected setting value displayed in the main area. The technician can enable or disable this operation mode feature.
When enabled, the instrument operator can bump-test the unit from operation mode.
Values:

0 = disabled ,1 = enabled

Bump test percentage
This screen features the status, configuration, and bump test icons, with the current setting value displayed in the main area. The technician can set the percentage of calibration gas to which the unit will respond.

Value range: 50% to 95%
Value increment: 1%

Bump test response-time
This screen features the status, clock, configuration, and bump test icons, with the current setting in seconds displayed in the main area. A sensor passes a bump test when it senses the specified percentage of calibration gas within the specified response time setting.

Value range: 30 to 120 seconds
Value increment: 5 second

Alarm latch
This screen features the status, alarm, lock, and configuration icons, with the current setting displayed in the main area. The technician can enable or disable this operation-mode feature.
When disabled, a unit in alarm will turn off its alarm when the gas reading is no longer at the alarm-producing concentration.
When enabled, a unit in alarm will remain in alarm until it is manually reset. The instrument operator can reset a latched alarm from gas normal reading screen by click button.
Values:

0 = disabled ,1 = enabled

Vibration alarm

This screen features the status, alarm, “VIb”, and configuration icons, with the selected setting value displayed in the main area. When enabled, the vibrating alarm will be activated when the unit is in alarm.
Values: 0 = disabled ,1 = enabled

Operation-mode zero (O2 instrument without this screen)

This screen features the status, lock, zero, and configuration icons. The technician can enable or disable this operation-mode option.
When enabled, the instrument operator can zero the unit from operation mode.
Values: 0 = disabled ,1 = enabled

Operation-mode calibration

This screen features the status, lock, configuration, and calibration icons. The technician can enable or disable this operation-mode option.
When enabled, the instrument operator can calibrate the unit from operation mode.
Values:0 = disabled ,1 = enabled

Security code

This screen features the status, lock, and configuration icons, with the current security code displayed in the main area. The security code controls access to a unit’s configuration mode and the ability to power off a unit that is configured for always-on operation.
If the security code is set at 000, entry to configuration mode is not security-code protected, and an always-on unit can be powered off without a security code. Any other value will enable the security code.
Value range: 000 to 999
Value increment: 1

Always-on

This screen features the status, lock, configuration, and the battery icon. The technician can enable or disable this feature.
When enabled, the entry of the unit’s security code (if the security code is not 000) will be required to complete the shutdown process.
Values:
0 = disabled ,1 = enabled

Operation mode
In the operation mode, the worker can scroll through the operating mode loop by continuously pressing the Mode button ( ). The zeroing, calibration, and alarm function test procedures can only be completed if these task settings are enabled for operating mode access。
TWA, STEL (if operating mode access is enabled) and peak readings can also be viewed and cleared. When the reading summary is cleared, CO and H2S value resets to zero.
In operation mode, the following apply:

Press to scroll through the operation-mode loop.
Press to initiate a task or to clear a reading.
A long press-on will reset a latched alarm; it does not disable an enabled latch.
Except where noted, when no button is pressed for 30 seconds, the home screen is activated

Operation instructions

Buttons or Screen Button effects or Screen Description

Saves the currently displayed value or activates the next configuration mode screen.
Increase value or First press activates the value. Continued presses increment the value; hold to speed the increment pace.

Gas monitoring

This screen (numerically shown) features the check mark and sensor-type icons, the current gas reading, and unit of measure.
The check mark indicates the unit is operational and there are no sensor faults.

Peak reading

This screen features the check mark, peak, and sensor-type icons, and the most recent peak reading, Press clear the reading then the value reset to 0, For O2 sensor, the reading will be reset to 20.9%vol.
TWA reading (O2 instrument without this screen)
This screen displays when the TWA reading is enabled in operation mode. The screen features the check mark, sensor type, and TWA icons, and the current TWA reading. Press clear the reading then the value reset to 0 .
STEL reading (O2 instrument without this screen)
This screen displays when the STEL reading is enabled in operation mode. The screen features the check mark, sensor type, and STEL icons, and the current STEL reading. Press clear the reading then the value reset to 0.

Initiate bump test