2
Approved Temperature Range
Metrology Pattern Approval
-20 °C ≤ Ta ≤ +50 °C (-4 °F ≤ Ta ≤ +122 °F)
a
The TANGO TX1 complies with relevant provisions of European ATEX directive 2014/34/EU and EMC directive 2014/30/EU.
b
The 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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