Digital Thermostatic Water Bath

I. Uses

This apparatus is designed for distilling, drying, concentrating, and heat-soaking chemicals or biological products.

II. Models & Specifications

The water baths are available in two patterns according to the arrangement of the openings:

(a) Single-row and (b) Double-row.

III. Construction

• Type: Water bath.
• Maximum opening diameter: 125mm.
• Accessories: Each opening is provided with 4 rings and 1 cover.
• Inner bath: One-piece sheet copper, formed by punching.
• Outer casing: High-quality sheet steel with a spray-lacquer finish.
• Insulation: The gap between the outer casing and the inner bath is filled with glass wool for heat preservation.
• Heating element: Immersed in water for rapid heating and energy efficiency.
• Thermostat: Equipped with a metal regulator to adjust the temperature from 37°C to 100°C as required.

IV. Operation

1. Setting the Temperature Press the SET key to enter temperature setting mode (the lower line display will flash). Use the △ key to increase the set value, and the ▽ key to decrease it. Holding the keys will change the value rapidly. Press SET again to exit and return to normal operation.
2. Parameter Setting (Internal Menu) Press and hold the SET key for 3 seconds to enter the internal menu. The parameters E, P, and T will appear in sequence: E (Offset of proportion zone): Adjusts the actual control point. Can be positive or negative. P (Proportion zone): Defines the proportional control range. The actual zone is twice this value. T (Heating output circulation period): The relay cycle time (typically 20–40s). Too short a period can shorten relay life. Example: If P=4.0 (actual zone 8.0), Temp=60.0°C, and E=2.0, the actual control point is 58.0°C. The unit enters proportional control at 54.0°C.
3. Error Correction Press and hold SET for 3 seconds to enter the internal menu. The first parameter, E, will flash. Use the △/▽ keys to adjust the correction value (range: -9.9°C to +9.9°C). Press SET again to cycle through P and T, or press it again to exit. The factory setting for the correction value is 0. Incorrect adjustment should be avoided.

V. Circuit & Safety

• The equipment operates on 220V AC.
• A rubber 3-strand main cord is provided, with the black wire for grounding.
• Important Safety Note: The grounding wire must be effectively connected. It can be welded to a water pipe or a buried galvanized tube (2m long, 25mm diameter). DO NOT connect the ground wire to a gas pipe.