TanGO TX1 User manual

Product
Manual
The Essential Guide for
Safety Teams and
Instrument Operators
Edition: 11
December 19, 2023
Part Number: 17154993-1

Industrial Scientific Corporation.
Pittsburgh, PA USA
Shanghai, China
© 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2023 Industrial Scientific Corporation
All rights reserved. Published 2023
Revision 16
www.indsci.com/TangoTX

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Contents
Contents.............................................................................................................................................................. i
Tables and Figures ............................................................................................................................................iii
Certifications ......................................................................................................................................................1
Product Overview............................................................................................................................................... 2
DualSense Technology................................................................................................................................................................. 3
Multiplane Sensor Ports and Data Memory .................................................................................................................................. 3
Dual-mode Operating System....................................................................................................................................................... 3
Gas alert and alarm features ........................................................................................................................................................ 3
Other key features ........................................................................................................................................................................ 4
Product Specifications .......................................................................................................................................4
Introduction ...................................................................................................................................................... 13
Procedures....................................................................................................................................................... 13
Recommendations...........................................................................................................................................14
Instrument storage...................................................................................................................................................................... 15
First Use...................................................................................................................................................................................... 15
Wearing the Instrument............................................................................................................................................................... 15
Cleaning the instrument exterior................................................................................................................................................. 15
Unpacking the Instrument ................................................................................................................................ 17
Display Overview .............................................................................................................................................19
Start-up and Shutdown ....................................................................................................................................21
Configuration.................................................................................................................................................... 23
Operation ......................................................................................................................................................... 35
Zero, Calibration, Bump Test, Response and Recovery Time Testing ............................................................37
Overview .......................................................................................................................................................... 43
Alarms.............................................................................................................................................................. 43
Warnings and failures ......................................................................................................................................44
Service Instructions.......................................................................................................................................... 47
Supplies ...................................................................................................................................................................................... 47
Tango TX1 Three-dimensional Diagrams................................................................................................................................... 48
Service Tasks ............................................................................................................................................................................. 50
Warranty Policy................................................................................................................................................ 54
Limitation of Liability.................................................................................................................................................................... 54
Appendix A....................................................................................................................................................... 55
Supplemental Information about Sensors and Gases ................................................................................................................ 55
Marking Requirements..................................................................................................................................... 56

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Workplace Atmosphere Gas Performance....................................................................................................... 56
Contact Information.......................................................................................................................................... 57

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Tables and Figures
Table 1.1 Certifications ..................................................................................................................................................................... 1
Table 1.2 Warnings and cautionary statements................................................................................................................................ 2
Table 1.3 Sensor-type options.......................................................................................................................................................... 3
Table 1.4 Instrument specifications .................................................................................................................................................. 4
Table 1.5 Sensor specifications........................................................................................................................................................ 6
Table 1.5 Sensor specifications........................................................................................................................................................ 7
Table 1.5 Sensor specifications........................................................................................................................................................ 8
Table 2.1 Industrial Scientific recommended practices, Tango TX1............................................................................................... 14
Figure 2.1 Securing the garment clip.............................................................................................................................................. 15
Table 3.1 Package contents ........................................................................................................................................................... 17
Figure 3.1 Hardware overview........................................................................................................................................................ 18
Table 3.2 Display screens, indicators, and abbreviations............................................................................................................... 19
Table 3.3 Start-up and shutdown.................................................................................................................................................... 21
Table 4.1 Configuration instructions ............................................................................................................................................... 24
Table 4.2 Operation instructions..................................................................................................................................................... 35
Table 4.3 Zero, calibration, bump test, response and recovery time testing .................................................................................. 37
Table 5.1 Alarm events................................................................................................................................................................... 44
Table 5.2 Warning events............................................................................................................................................................... 45
Table 5.3 Warning and failure screens ........................................................................................................................................... 45
Figure 6.1 Disassembled Tango TX1 ............................................................................................................................................. 48
Figure 6.2 Disassembled Tango TX1 case top assembly............................................................................................................... 48
Table 6.1 Tango TX1 parts list........................................................................................................................................................ 49
Table 6.2 Service tasks................................................................................................................................................................... 50
Table A.2 ATEX and IECEx marking requirements ........................................................................................................................ 56

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General Information
Certifications
Product Overview
Product Specifications
Certifications
Certifications for the Tango®TX1, at the time of this document's publication, are listed below in Table 1.1.
To determine the hazardous-area classifications for which an instrument is certified, refer to its label or the
instrument order.
Table 1.1 Certifications
Directive or CB
Area Classifications
Approved Temperature Range
Americas
CSA
Ex ia IIC T4; Class 1; Groups A, B, C, D; T4
-40 °C to +50 °C (-40 °F to +122 °F)
IECEx
Ex ia I Ma
Ex ia IIC T4 Ga
-40 °C to +50 °C (-40 °F to +122 °F)
INMETRO
Ex ia IIC T4 Ga
Ex ia I Ma
-40 °C to +50 °C (-40 °F to +122 °F)
UL
Class I, Zone 0, AEx ia IIC T4
Class II, Groups E, F, G
-40 °C to +50 °C (-40 °F to +122 °F)
Europe and Russia
ATEXa
Ex ia I Ma
Ex ia IIC T4 Ga
Equipment Groups and Categories: I M1 and II 1G
-40 °C to +50 °C (-40 °F to +122 °F)
GOST EAC
PO Ex ia I X
0 Ex ia IIC T4 X
-40 °C to +50 °C (-40 °F to +122 °F)
GOST-R, -UA
Metrology Pattern Approval
-20 °C to +50 °C (-4 °F to +122 °F)
UKExb
Ex ia I Ma
Ex ia IIC T4 Ga
Equipment Group and Category: I M1 and II 1G
-40 °C to +50 °C (-40 °F to +122 °F)
Asia and Pacific
China Ex
Ex ia IIC T4 Ga
-20 °C to +50 °C (-4 °F to +122 °F)

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Table 1.1 Certifications
Directive or CB
Area Classifications
Approved Temperature Range
China CPA
Metrology Pattern Approval
-20 °C ≤ Ta ≤ +50 °C (-4 °F ≤ Ta ≤ +122 °F)
aThe TANGO TX1 complies with relevant provisions of European ATEX directive 2014/34/EU and EMC directive 2014/30/EU.
bThe TANGO TX1 complies with relevant harmonized standards and legislation provisions for UK SI 2016 No. 1107, No. 1091, UK SI 2012 No. 3032.
Note: See also Marking Requirements for ATEX and IECEx in the Appendix.
Table 1.2 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.
Substitution of components may impair intrinsic safety and may cause an unsafe condition.
Do not replace battery in hazardous locations. Only certified for use with one Tadiran TL-5955 battery cell.
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. Replace the sensor water barriers and gaskets as needed (see “Service” for instructions).
Service the unit, use its communications port, and change its battery cell only in nonhazardous locations. Not for
use in oxygen-enriched atmospheres.
Contact your service representative immediately if you suspect that the unit is working abnormally.
Do not use in oxygen-enriched atmospheres. Explosion safety is certified only up to 21% Oxygen.
Sudden changes in atmospheric pressure, temperature, or humidity may cause temporary fluctuations in gas
readings.
Between regular calibration procedures, Industrial Scientific also recommends that calibration be performed
following each of these incidences: the unit falls, is dropped, or experiences another significant impact; is
exposed to water; fails a bump test; or has been repeatedly exposed to an over-range (positive or negative) gas
concentration. Calibration is also recommended after the installation of a new (or replacement) sensor.
Calibration gases contain high concentrations of toxic gases that can pose risks to human health. To
understand the potential hazards associated with calibration gas, please consult the Safety Data Sheets (SDS)
available on the Industrial Scientific website. http://www.indsci.com/en/explore/calibration-gas-and-reference-
chart
Make sure to check that the time and date are correct after replacing the battery. If necessary, you can refer to
Table 4.1 for instructions on how to set the time and date.
Product Overview
The Tango TX1 is a portable, long-life, single-gas monitor (instrument) for personal protection. It is a
diffusion instrument for use in detecting and measuring gas present in open space. Based on the

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customer’s order, two redundant sensors–sensors of the same type–are factory installed. Five sensor types
are available (see Table 1.3).
Table 1.3 Sensor-type options
Sensor
Category
Number of sensors
available per
instrument
Sensor type
Toxic Two of the same type Carbon Monoxide (CO) only, Hydrogen Sulfide (H2S) only, Nitrogen Dioxide
(NO2) only,Sulfur Dioxide (SO2) only, or Carbon Monoxide with low
Hydrogen cross-sensitivity (CO/H2Low) only.
Note: See Table 1.5 for sensor specifications.
DUALSENSE TECHNOLOGY
DualSense®Technology enables the use of redundant sensors, two installed sensors of the same type that
are DualSense capable. The DualSense sensors measure the target gas concentration in the atmosphere
at the same time but operate independently of each other. Using a proprietary algorithm, the instrument
processes each sensor's data to display a single gas reading, while maintaining data logs for each sensor
and for the derived DualSense "virtual" sensor.
Each sensor will revert to operate as a single sensor in the event its redundant sensor fails. This allows the
instrument to continue operation until the failed sensor can be replaced.
MULTIPLANE SENSOR PORTS AND DATA MEMORY
The Tango TX1’s multi-plane sensor ports each sample air from three directions; this promotes continuous
operation if one or two planes become obstructed. Since the TX1 measures gas at two second intervals,
and continuously logs data every ten seconds, the data log can store approximately three months of data
for a unit that is on 24 hours a day and has two installed, operational sensors. As the newest data are
logged to memory, the oldest data are overwritten. The data log's date- and time-stamped event log
records and stores event data for 60 alarm events and 30 error events. It also stores the data for up to 250
manual calibration procedures and bump tests. The data log is downloaded when the unit is docked in a
compatible docking station.
DUAL-MODE OPERATING SYSTEM
The instrument has two modes; configuration and operation. When in configuration mode, a unit's settings
can be manually edited. Entry to configuration mode can be security-code protected. When the instrument
is on and is not in configuration mode, it is in operation mode.
GAS ALERT AND ALARM FEATURES
The Tango TX1 has a multisensory (audible, visual, and vibration), multilevel warning and alarm system.
Warnings indicate a service need (calibration due) or an operating condition (confidence indicator). Alarms
indicate potentially hazardous gas concentrations or system faults. The instrument also features a country-
of-origin option that automatically sets the values for the low-gas and high-gas alarm setpoints for each of
five different countries or regions; each alarm setpoint value can also be manually edited.

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The optional "acknowledgeable gas-alert” feature warns the instrument operator of the presence of gas in
concentrations that may be approaching the instrument’s alarm setpoints. An alert can prompt the
instrument operator to check the display screen for gas readings.
If the measurement of a detected gas in the atmosphere reaches the gas-alert setpoint, which is below the
low-alarm setpoint, the gas alert is activated. The instrument operator can temporarily turn off an alert's
signals for 30 minutes; the instrument will continue to monitor for gas, display readings, and activate any
alarms or other gas alerts that may occur.
After 30 minutes, if the gas reading for the acknowledged alert has remained at (or again reached) the gas-
alert setpoint, the alert signals will be reactivated.
The alarm-latch feature is used to keep an alarm on after the alarm-causing condition no longer exists. This
serves to sustain alarm signals, which can encourage the instrument operator to check the display screen
for gas readings, and to optionally release the alarm latch.
The always-on feature keeps the instrument from being shut down, without first entering the three-digit
security code. This option can be enabled or disabled through the configuration mode.
OTHER KEY FEATURES
The user interface consists of two buttons and an LCD (liquid crystal display). The buttons are used to
power on and power off the instrument, navigate the operation and configuration loops, perform tasks, and
access information. The unit can be set to display select information in English or French.
The unit's garment clip is intended for attachment to a garment; it is not intended for attachment to a belt or
hard hat. An optional AlarmAmpTM is also available; when used, the audible alarm volume is increased by
approximately 10 decibels (dB).
The Tango TX1 is iNet® ready and compatible with the Tango TX1 DSX™ Docking Stations.
Product Specifications
Effective use of the Tango TX1 includes knowledge of the instrument's specifications and its sensor and
battery specifications (see Tables 1.4 through 1.6).
Table 1.4 Instrument specifications
Item
Description
Display
Segment LCD
Keypad buttons
Two buttons
Case materials Case top: polycarbonate with a protective rubber over-mold
Case bottom: conductive polycarbonate
Alarms
Three strobe-emitting visual alarm LEDs (two red; one blue)
95 dB audible alarm at a distance of 10 cm (3.94"), typical
Vibration alarm
Dimensions 99 x 51 x 35 mm (3.9 " x 2.0 " x 1.4 ")