IEC 60068-2-78 Six Zones Independent Control Type Humidity Heat
Test Chamber
Brief Introduction:
The 6-Zones High and Low Temperature Humidity Heat Test Chamber
meets the standard requirements:
IEC60068-2-2:2007 Environmental testing - Part 2-2: Tests - Test B: Dry heat
IEC60068-2-78:2007 Environmental testing - Part 2-78: Tests-Test
Cab: Damp heat, steady state
IEC60068-2-1:2007 Environmental testing - Part 2-1: Tests - Test A:
Cold
GJB150.4-1986 Low temperature test
GJB150.3-1986 High temperature test
Technical parameters:
Temperature range:
Chamber type ① : -40℃ ~ 150℃ (temperature range adjustment)
Chamber type ② : -40℃ ~ 150℃ (temperature range adjustment)
Chamber type ③ : -60℃ ~ 150℃ (temperature range adjustment)
Chamber type ④ : -60℃ ~ 150℃ (temperature range adjustment)
Chamber type ⑤ : -40℃ ~ 150℃ (temperature range adjustment)
Chamber type ⑥ : -40℃ ~ 150℃ (temperature range adjustment)
Humidity range:
Chamber type ① : 30% ~ 98%RH (temperature range adjustment)
Chamber type ② : 30% ~ 98%RH (temperature range adjustment)
Chamber type 3:30% ~ 98%RH (temperature range adjustment)
Chamber type ④ : 30% ~ 98%RH (temperature range adjustment)
Chamber type ⑤ : 20% ~ 98%RH (temperature range adjustment)
Chamber type ⑥ : 20% ~ 98%RH (temperature range adjustment)
Temperature fluctuation: ≤0.5°C
Temperature deviation: ≤±2℃
Temperature uniformity: ≤2℃
Temperature change rate (the average value of the whole process
measured at an ambient temperature of 20±2°C)
Heating rate: ≥3℃/min (electric heating)
Cooling rate: ≥1℃℃/min (mechanical refrigeration)
Installed power: about 18.5KW.
Noise: ≤ 70db(A), in a silent room, measured at 1 meter in front of
the test box
COOLING SYSTEM
This equipment is mechanically cooled by a monopolar system. It is
realized by an advanced hermetic compressor.
Refrigeration method: single-stage mechanical compressor
It adopts the cold end PID adjustment technology, which can achieve
the effect of temperature control through the accurate output of
the compressor cooling capacity. The whole process of cooling and
maintaining the temperature below normal temperature does not
require the participation of the heater, which is completely
different from the balance temperature control method of cold and
heat, which means the energy saving more than 30%.
This equipment uses the environmentally friendly refrigerant R404A
(CFC free) not prohibited by the Montreal Convention or the London
Amendments and new US EPA laws. Cooling method: air cooling
Refrigeration auxiliary parts: The main refrigeration parts are
imported, such as thermal expansion valve and pressure controller
from Danfoss Company in Denmark; filter and oil separator from
EMERSON Company in the United States; solenoid valve from Castel in
Italy.
Refrigeration Control Checklist
AIR ADJUSTABLE SYSTEM
Air circulation device: built-in air conditioning room, circulating
air duct and long axis fan. By improving the blast airflow of the
air, the air flow, heating and cooling capacity are increased, and
the temperature uniformity of the test chamber is greatly improved.
Air cooling method: multi-stage membrane air heat exchanger
Heating method: high-quality nickel-chromium alloy wire electric
heater. (Using non-contact solid state relay control)
CONSTRUCTIVE MAIN FEATURES
Structure: the whole box adopts integral type
Material: The inner tank is imported & 1.0mm SUS304 stainless steel
plate; the outer shell & 1.0mm steel plate are sprayed with
plastic.
Insulation layer: high-density polyurethane foam board + glass
wool, with high strength and non-flammable, non-depositing
properties.
Shelf load bearing: 30kg/piece, (a total of 1 stainless steel
partition)
Cable Test Holes: None.
Configuration:
The lower part of the air conditioning unit is provided with a
water outlet.
The door lock is on the right side of the box, with a fully open
single wing, with a silicone rubber seal (not easy to age and
harden).
1x35W light, with protective cover and control switch on the
control panel outside the box.
There is a gas handling unit on the rear wall of the box.
Components of the gas handling unit:
- cooling evaporator
- Heating system
- Thermally Regulated Air Circulation Fan
- Temperature Sensor
- The flow of thermally conditioned air passes through the various
elements mentioned above before entering the test chamber.
- Heating System: High Efficiency Nichrome Electronic Heater
Protected by Adjustable Fail/Safe Thermostat Disconnect Switch.
- Internal airflow regulation: through the action of high-power
centrifugal fans, forced air circulation can achieve good
temperature uniformity
- Airflow Control System: Long-axis motor-driven air supply
Security Measures
Safe and reliable grounding protection device;
Power supply overvoltage and undervoltage, phase loss, phase error
protection;
Independent studio over temperature protection;
Heater short circuit/overload protection;
Refrigerator overpressure/overload protection;
Blower motor overload protection;
Control line overcurrent protection, leakage protection and
automatic cut-off.
Control System
| Project | Content |
| Controller | 7-inch LCD touch programmable controller |
| Touch high-definition screen | The fixed conditions and program conditions can be set arbitrarily,
the Chinese screen can be set, and the curing test name and serial
number can be set. |
| Settable time range | 0—999H59min. |
Programmable mode
| At the same time, 120 groups of programs with different conditions
can be set. In any group of programs, the work can be divided into
1200 segments, and the number of segments can be arbitrarily
intercepted to execute the cycle, or the periodic cycle of any
segment or group can be performed. |
| In each group of programs, up to 1200 different temperature and
time sections can be set (each section can be set up to 999h59min).
120 groups of programs can be connected in series at will, and the
maximum number of sections can be cycled up to 999 times. |
| Safety | With a power-off memory device, the remaining programs can continue
to be executed when the power is restored, and the machine can be
reserved to execute the start-up and machine running time. |
| Control | Rising and cooling can be used for slope control and curve control,
and has the function of self-correcting temperature and humidity
reference points. It has the function of PID automatic calculation,
which can reduce the convenience brought by manual setting. |
| Set up | Touch setting, direct display of position, all conditions are
completely automatically locked by microcomputer |
| Warning | If there is an error in the setting or operation, a warning signal
will be provided |
| Output | The controller has a recording signal port output, which can be
connected to a temperature and humidity recorder and output a
recording curve |
| Interface | With standard RS-232 communication interface, long transmission
distance, can be connected to PC for control and recording. |
