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Air to Air Thermal Shock Chamber with Humidity

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Thermal cycle testing and dew cycle testing in a single unit

Today, the automotive industry accelerates electronic multi-functions. According to this trend, safety standards such as ISO26262 and IEC61508 require high environmental stress that is generated by thermal shock chambers for higher reliability of vehicle equipments.

Mobile devices, such as laptops, smartphones, and cell phones, and electronic parts that demand has being accelerated in automotive industry (harness, ECU, PCU, etc.) are subjected to rapid temperature changes as they are moved between outside and inside environments. Naturally, these products and parts require thermal cycle testing, which repeatedly subjects them to rapid warming and cooling. Dew condensation that forms as a result of temperature changes also poses a major problem. Dew condensation can greatly affect the performance and function of electronic devices and result in corrosion, migration, or malfunction. Therefore, dew cycle testing, which repeatedly re-creates dew condensation and dry conditions is essential.

"Air to Air Thermal Shock Chamber with Humidity" is an innovative hybrid test system that enables both tests in a single unit. Two tests that have conventionally required two separate test chambers can now be performed in one unit, thereby lowering costs and space requirements.

Innovative hybrid test system
The hot chamber at the top of the thermal shock chamber (TSA) has been changed to a high temperature and humidity chamber that can control humidity, thereby enabling dew cycle tests. The ability to perform two tests in one unit not only lowers costs and space requirements, but it also saves on labor required to insert and remove specimens, thereby reducing testing manpower.
This is a hybrid model with high performance so it can provide dew cycle testing and low-temperature dew cycle testing for in-vehicle components.
Sufficient thermal cycle test functions

The minimum temperature at low-temperature exposure is -70°C (TSA-103ES/TSA-203ES, -70°C), and the maximum temperature at high-temperature exposure is +150°C (same, +200°C). It complies with EIAJ ED-2531A and other testing standards.

* Please contact us for more information on standards test support (JPCA-ET09 Dew condensation test).

The dew cycle test was originally started with a focus on the reproducibility of dew condensation (repetition of switched cycle between "low temperature and low humidity" and "high temperature and high humidity"). This model supports the temperature/humidity cycle with the freezing condition to which in-vehicle electrical components are exposed and demand for systems with this cycle is increasing.

Test example "Frozen" ~ "Dew condensation" ~ "Drying"

‐30°C/1hour
+25°C/90%rh/1hour
+25°C/Dehumidification/1hour30min
Repetition of this cycle

* This application example is posted on the TestNavi site.

Features humidity cycle test functions
  • Excellent temperature uniformity generates uniform dew condensation on the specimen.
  • Controlling the temperature of the test area walls prevents water droplets falling from the ceiling.
  • A wind velocity controller in the high temperature and humidity chamber enables to control dew condensation time and uniformity.
  • The high temperature and humidity chamber is equipped with a defrost circuit. There is no need to cancel a test to defrost.
Chamber construction
Chamber construction
Main specifications
Model TSA-102D-W TSA-202D-W
Power supply 200 V AC, 3 ohm, 3W, 50/60 Hz (Can support any power supply voltage as an option)
Method Two-zone and three-zone using damper switching
Performance*1 Test area*2 High-temp. exposure range
  1. Thermal cycle test +70°C to +150°C
  2. Dew cycle test -10°C to +100°C
Low-temp. exposure range
  1. Thermal cycle test -70°C to +10°C
  2. Dew cycle test -40°C to +10°C
Temperature fluctuation width ±1°C
Humidity fluctuation width ±5% rh
High temperature and humidity chamber
(single unit performance)
Max pre-heat setting temperature +150°C
Humidity range 40 to 95%rh (For dew cycle test)
Temperature heat-up time Within 30 minutes from -10°C to +100°C
Temperature pull-down time Within 60 minutes from +20°C to -10°C
Low temperature chamber
(single unit performance)
Min pre-heat setting temperature -75°C
Temperature heat-up time Within 30 minutes from -75°C to +10°C
Temperature pull-down time Within 60 minutes from ambient temperature to -75°C
Temperature recovery performance*3 Thermal cycle test Recovery conditions
  • Three-zone
    • Low temperature exposure: -65°C (30 minutes)
    • Ambient-temperature exposure: ambient temperature (10 minutes)
    • High temperature exposure: +150°C (30 minutes)
  • Power supply voltage: rated voltage
  • Sensor position: upstream
  • Specimen: plastic mold IC 5kg
  • Specimen: plastic mold IC 10kg
Recovery time High temperature recovery: within 10 minutes
(Ambient temperature→ +150°C)
Low temperature recovery: within 10 minutes
(Ambient temperature→ -65°C)
High temperature recovery: within 16 minutes
(Ambient temperature→ +150°C)
Low temperature recovery: within 16 minutes
(Ambient temperature→ -65°C)
Dew cycle test 1 Recovery conditions
  • Two-zone
    • Low temperature exposure: +5°C (20 minutes)
    • High temperature and humidity exposure operation : +25°C 90% (20 minutes)
  • Power supply voltage: rated voltage
  • Sensor position: upstream
  • Specimen: print substrate 2 kg
  • Specimen: print substrate 5 kg
Recovery time*4 High temperature recovery: within 20 seconds
(+5°C→+25°C 90%)
Low temperature recovery: within 3 minutes
(+25°C 90%rh→+5°C)
High temperature recovery: within 20 seconds
(+5°C→+25°C 90%)
Low temperature recovery: within 5 minutes
(+25°C 90%rh→+5°C)
Dew cycle test 2 Recovery conditions*5
  • Two-zone
    • Low temperature exposure: -30°C (60 minutes)
    • High temperature and humidity exposure operation: +25°C 95% (60 minutes)
    • *Pre-heating temperature 25°C 95%
  • Power supply voltage: rated voltage
  • Sensor position: upstream
  • Specimen: no specimen
Recovery time*4
  • High temperature and humidity recovery: within 5 minutes (-30°C→+25°C 95%)
  • Low temperature and humidity recovery: within 5 minutes (+25°C 95%rh→-30°C)
Specimen basket load capacity 5kg (Equally distributed load)
Test area dimensions W650×H460×D370mm W650×H460×D670mm
Outside dimensions W1670×H1900×D1570mm
(excluding protrusions)
W1670×H1900×D1870mm
(excluding protrusions)
Weight Approx. 1,300 kg Approx. 1,550 kg
*1 With an ambient temperature of +23°C.
*2 There are conditions for operation performance of a dew cycle test. Please contact us for more information.
*3 With an ambient temperature of +23°C and a cooling water temperature of +25°C.
*4 Performance of temperature only
*5 Defrosting is required once using cycle defrosting every 12 cycles (may vary by ambient temperature).
* The model is for operational purposes and may be changed after order. Thank you for your understanding.
Actual application examples
· Dew condensation test Specimen: Automotive headlight, in-vehicle instruments
· In-vehicle PCUs Heat generation of specimen 600 W
· +5°C ⇔ +25°C/90%rh Test area recovery time High temperature recovery 20 sec
/Low temperature recovery 3 min
Exposure time 20 min Specimen:
Circuit mounted board

* For more details including the support status of other testing standards, compatibility with system devices, and standards for automotive components such as JASO D014, please contact our sales representatives.

* For information on the ion migration evaluation system (AMI) and compatibility with various devices, please contact our sales representatives.