Purpose and Features

This equipment is suitable for low-temperature quick-freezing tests of various products, such as chemicals, physics, pharmaceuticals, instruments, electrical appliances, marine biology, etc. It is used for low-temperature storage of vaccines and serums, microbiological research and cultivation, drug testing and storage, low-temperature testing of building materials, etc. The instrument consists of a branded compressor, condenser, filter, capillary tube, evaporator constant temperature bath, digital display instrument, and digital temperature control system. The machine cools quickly, operates quietly, and is reliable and convenient to use.

Technical Parameters Table

Structural Features

This instrument uses a side-opening door and thickened insulation layer for good low-temperature retention and convenient experiments. The constant temperature bath is made of highly corrosion-resistant alloy plates, with high-quality steel plates on the outside and polyurethane insulation material in the middle.

Precautions

1. The instrument must not be stored or used in environments with moisture or corrosive gases.

For the first use (or after long periods of non-use), the machine must operate for 2 hours before testing to avoid inaccurate initial readings.
2. In case of power outage or disconnection for any reason, immediately turn off the power switch. If restarting is needed, wait at least 30 minutes before turning on the machine again to avoid compressor damage from rapid startup.

3. This instrument is suitable for laboratory testing.

4. It is strictly forbidden to run the machine for long periods when not in use.

5. During transportation, the tilt angle must not exceed 45° to avoid compressor or system damage. When in use, remove all packaging. Leave more than 50cm space behind the freezer and more than 15cm on both sides. The freezer should be placed in a ventilated and dry place, avoid direct sunlight, and keep away from pools, heat sources, magnetic fields, and various volatile or corrosive substances.

6. A dedicated socket must be used. The current capacity of the socket and wiring should be no less than 10A, and the socket must be reliably grounded.

7. The power supply is single-phase AC 50Hz, voltage 220-242V. If voltage is unstable, install a voltage stabilizer with at least 5 times the input power. Use a stabilizer rated at 220V 50Hz 15A. The instrument must be grounded.

Freezing Instructions

1. When placing samples, leave some space between samples and between samples and the freezer inner wall to ensure air circulation and uniform cooling.

2. For items with high humidity or prone to moisture loss, wrap them in well-sealed food bags or cling film to prevent moisture from escaping and causing frost inside the chamber, which affects cooling.

3. It is strictly forbidden to store volatile or flammable gases and liquids in the freezer, such as strong alkalis, strong acids, gasoline, alcohol, etc.

4. Do not overload the freezer with samples at one time, as this will cause the compressor to run continuously for a long time and slow temperature drop, failing to meet requirements.

5. After finishing work, cut off the power, remove frozen samples, open the freezer door to allow natural warming, let frost melt, drain water, and wipe dry with a soft cloth.

Usage Instructions

1. When placing samples, leave some space between samples and between samples and the freezer inner wall to ensure air circulation and uniform cooling.

2. For items with high humidity or prone to moisture loss, wrap them in well-sealed food bags or cling film to prevent moisture from escaping and causing frost inside the chamber, which affects cooling.

3. It is strictly forbidden to store volatile or flammable gases and liquids in the freezer, such as strong alkalis, strong acids, gasoline, alcohol, etc.

4. Do not overload the freezer with samples at one time, as this will cause the compressor to run continuously for a long time and slow temperature drop, failing to meet requirements.

5. After finishing work, cut off the power, remove frozen samples, open the freezer door to allow natural warming, let frost melt, drain water, and wipe dry with a soft cloth.

Maintenance and Care

1. When placing samples, leave some space between samples and between samples and the freezer inner wall to ensure air circulation and uniform cooling.

2. For items with high humidity or prone to moisture loss, wrap them in well-sealed food bags or cling film to prevent moisture from escaping and causing frost inside the chamber, which affects cooling.

3. It is strictly forbidden to store volatile or flammable gases and liquids in the freezer, such as strong alkalis, strong acids, gasoline, alcohol, etc.

4. Do not overload the freezer with samples at one time, as this will cause the compressor to run continuously for a long time and slow temperature drop, failing to meet requirements.

5. After finishing work, cut off the power, remove frozen samples, open the freezer door to allow natural warming, let frost melt, drain water, and wipe dry with a soft cloth.

The following phenomena are not faults, please do not worry:

1. When the quick-freezer is working or has just stopped, the refrigerant circulates inside the pipes, producing a gurgling water sound.

2. The compressor surface temperature may reach 70℃~80℃ during operation.

3. When the compressor starts or stops, the switch components may produce slight clicking sounds.

4. During rainy and humid seasons, frost may form on the outer surface of the cabinet; wipe it off with a dry cloth.

5. The inner side of the freezer lining is a stress relief area for ultra-low temperatures. Slight cracks may appear under alternating high and low temperatures, which is normal and does not affect use.

Repair Instructions

1. If abnormal phenomena or faults occur during use, please have a professional technician repair it (or under manufacturer guidance).

2. Our factory provides free spare parts for domestic compressors (custom machines) within one year from shipment, and free one-year warranty for imported compressors (standard machines).

3. Warranty period: one year from delivery acceptance, excluding fragile glass parts (no returns or exchanges for custom machines). During warranty, logistics costs are paid by the sender (who ships pays). Spare parts are provided free by the factory, with technical support. If compressor replacement is needed, a service fee of 150 yuan is charged, and refrigerant is provided free by the factory. For glass-covered low-temperature boxes, add a quilt on the cover for insulation.

Note:

1. Remove the base after unpacking and keep ventilation.
2. Please keep the wooden crate packaging for maintenance use; otherwise, the user bears the cost.
3. It is strictly forbidden to operate continuously in environments above 35℃.

Digital Temperature Controller Instructions:

Quickly press the "set" button three times consecutively to enter the setting mode: first, the lower limit setting value is displayed: (negative F). At this point, press the up or down button to select the lower limit value, then press the set button to lock the lower limit value and display the upper limit value (positive F). At this point, press the up or down button to select the upper limit value, then press the set button to lock the upper limit value and display the delay status Y---Y03 indicates a 3-minute delay before starting (must be set to Y03 to avoid compressor damage). Press the set button again to lock the delay value and display the JCC cooling mode (must be JCC). Press the set button again to lock the cooling mode and display C-6, the temperature calibration range (adjusted at the factory). Press set again to lock. After waiting for sixteen seconds, all settings are saved and the instrument's internal actual temperature is displayed. (After setting, you must press the set button once more and wait sixteen seconds before turning off the power, otherwise the settings will not be saved).
Setting example.
(1) -25 degrees -------- lower limit negative F25, upper limit positive F22, delay Y03, cooling JCC, calibration C-6. (Special note: the dash between negative F and positive F flashes when below zero; otherwise, it changes to positive L and negative L for above zero.)
(2) -40 degrees -------- lower limit -40, upper limit -37 cooling, Y03, JCC, C-6.
(3) -50 degrees ----- lower limit -50, upper limit -47, delay Y03, .... Wiring instructions: 1 neutral line, 2 live line. Cooling 1,3 output. 2,4 in series.
Special note about temperature calibration C-6:
If there is a discrepancy between the internal box temperature and the instrument display temperature, quickly press the SET button three times: (1) negative F appears, (2) press SET again to show positive F, (3) press SET again to show Y03, (4) press SET again to show JCC, (5) press SET "set" button again to show C-6 for setting the internal sensor calibration (calibration range -6 to +6). After setting, press the "SET" button once more to confirm the setting. Example: if the instrument displays -24 degrees and the internal box temperature is -25 degrees, then change C-6 to C-1.