Environmental Test Chamber Rapid Temperature Change Rate
ESS Chamber for Electric Products Environmental test
Rapid Temperature change rate test chamber, also name as ESS chamber, Environmental Stress Screening Test Chamber, is to change the external environmental stress by using the
temperature acceleration technique (the product produces
alternating expansion and contraction when circulating in the upper
and lower extreme temperatures) under the design strength limit, so
as to generate thermal stress and strain in the product.
In the earlier days of ESS, environmental chambers offered air
temperature cycling transition rates on the order of 5°C per
minute. This transition rate was often referred to as "average" by
most chamber manufacturers. In reality, during an average rate
temperature transition, the
air temperature rate of change may vary greatly from the average
rate.
For temperature pulldowns with mechanical cooling, dT/dt will be
much greater than the average in the early stages of the pulldown
and much below the average as the low temperature extreme is
approached. When plotted out, the time/temperature relationship is
a curve with a steeper slope at the beginning of the pulldown and a
flatter slope at the end, but nevertheless resulting in some
average transition rate for the complete pulldown.
Environmental Test Chamber for Rapid Temperature Changes / ESS
Chamber features:
1.Graceful appearance, circularly shaped body, surface treated with
mist strips, and plane handle with no reaction. Easy to operate,
safe and reliable.
2. Rectangular viewing window for the observation of product under
test, equipped with sweat-proof electrical heating device that can prevent water steam from condensing into droplets, and
with high brightness PL fluorescent bulbs to provide light inside
the box.
3.Double-layer-insulated airtight doors, able to insulate the
internal temperature effectively.
4.Water supply system that is externally connectable, convenient
for refilling water into the humidifying pot and automatically
recyclable.
5. French Tecumseh is used for the compressor circulation system,
capable of removing the lubricant between thecondensation pipes and capillaries. environment friendly coolant is
(R23,R404A)
6.LCD display screen is used for the control unit, capable of
displaying the measured value as well as the set value and time.
7. The control unit has the functions of multiples segment program
editing, and with temperature ramp
8. Casters for ease of mobility, with strong positioning screws.
| Model | SM-KS-80-CA | SM-KS-150-CA | SM-KS-225-CA | SM-KS-408-CA | SM-KS-800-CA | SM-KS-1000-CA | SM-KS-1500-CA |
| Temperature | Temperature control
range | -70℃～180℃ |
| Temperature fluctuation | ±0.5℃ |
| Cooling rate | 155.0℃～-65.0℃ (linear or nonlinear:5.0℃/min) |
| Heating rate | -65.0℃～155.0℃ (linear or nonlinear:5.0℃/min) |
| Temperature uniformity | ±1.5℃ (-40.0℃～100.0℃) |
| ±2.0℃ (100.1℃～180.0℃or-40.0℃～-70.0℃) |
Material /
components | Internal material | Adopts 1.2mm thickness stainess steel(SUS304) |
| External material | Adopts 1.5mm thickness Cold rolled steel sheet / powder spraying |
| Heat insulating material | 100mm thickness polyurethane plate＋10mm thickness mineral wool |
| Fan | Centrifugal blower |
| Compressor | Semi-closed Germany Bock, Germany Bitzer |
| Condenser | Air cooling, water cooling |
| Refrigerant | R404A,R23,R508 |
| Evaporator | Fin - and - Tube Heat Exchanger |
| Heater | Nickel chromium alloy heating wire |
| Humidifier | Steam humidifier |
| Size | Interior size(mm)
W*H*D | 500*500 *400 | 500*600 *500 | 500*750 *600 | 800*850 *600 | 1000*1000 *800 | 1000*1000 *1000 | 1200*1000 *1250 |
| Volume(L) | 80L | 150L | 225L | 408L | 800L | 1000L | 1500L |
| Operating ambient temperature | +5 ~ 35℃ |
| Safety | Adjustable over temperature protection, heater dry burning over
temperature protection, humidifier dry burning, over temperature
protection, automatic stop operation when troubles occur. Leakage
protection function cuts off main power supply |
| Power supply | 380V AC 50/60Hz | 380V AC 50/60Hz | 380V AC 50/60Hz | 380V AC 50/60Hz | 380V AC 50/60Hz | 380V AC 50/60Hz | 380V AC 50/60Hz |
| Controller | Standard: Sanwood SH5600 programmable controller; With RS485 or RS232 port |
