Product Parameters

Overview

The 101 series drying oven is a high-temperature test auxiliary product designed and manufactured by our company according to national standards. It features a beautiful box design, light weight, fast heating speed, uniform temperature, and good insulation performance. It uses a high-precision intelligent temperature controller with a sensor that has cold junction compensation. The heating power is regulated by a silicon-controlled rectifier, providing stable temperature and simple operation.

This oven is specially designed to provide high-temperature conditions for industrial production and scientific research units, mainly suitable for drying test specimens and other materials.

Structural Description

The outer box of this oven is made of cold-rolled steel plate, and the inner chamber is made of galvanized sheet or stainless steel. Between the outer box and the chamber, aluminum silicate fiber cotton and asbestos board are filled as insulation layers. The electric heater uses a far-infrared heating radiator and an internal circulation blower to make air convection more uniform.

Technical Parameters

A. Standard drying temperature: 105℃

B. Temperature control accuracy fluctuation: ≤2℃

C. Maximum working temperature: 250℃

D. Power supply voltage: AC220V/50HZ

Model series and their parameters:

Temperature Control Adjustment Method

This device uses intelligent temperature instruments model 101-B XMTD-202C and 101-B XMTD-702 as temperature controllers, compatible with sensor models 101-B PT100 and 101-A Type K thermocouples (temperature controllers with cold junction compensation). After single-point temperature calibration, accuracy can reach 0.5℃.

Temperature controller operation method is as follows:

1. Set temperature: Press the SET key once to set the temperature. The lower row of the digital tube flashes (upper row shows normal temperature measurement), entering the temperature setting state. Press the △ key to increase the set value, press the ▽ key to decrease it, then press SET again to return to normal working state and complete the temperature setting.
2. Sensor error correction: Press and hold the SET key for 3 seconds to enter the instrument's inner menu. Select parameter SC and use △ or ▽ keys to correct the error. Display resolution is 0.1 degrees. The correction range for sensor error is ±19.9; for 1-degree display resolution, the correction range is ±50 degrees. Press SET for 3 seconds to exit. The factory correction value is 0.
3. Start auto-tuning: This product can adapt to most control systems. Auto-tuning should only be started if control effect is particularly unsatisfactory. Method 1: After powering on, press the displacement key for 3 seconds to start auto-tuning. Method 2: Press and hold SET for 3 seconds to enter the inner menu, select parameter At, press △ to set the lower row to 1, then press SET for 3 seconds to start auto-tuning. During auto-tuning, the Atu indicator flashes. The instrument controls the heating system to oscillate twice near the set point. When the Atu indicator goes off, auto-tuning ends and new PID parameters are locked in the chip.

Setting and explanation of instrument function parameters (press SET for 3 seconds to enter inner working parameters)

Usage instructions

A. Connect the grounding wire of the drying oven properly (grounding point is at the back of the drying oven). Use a megohmmeter to check that the insulation resistance between the power input line and the casing is >2 megaohms.

B. Adjust the instrument's setting keys to the desired temperature. If it is a digital display, set the number to the desired temperature.

C. Turn on the power, switch on the power switch, and simultaneously turn on the auxiliary heating switch and fan switch. Auxiliary heating allows the drying oven to heat up quickly, and the fan is used to make the temperature inside the oven uniform. After reaching the set temperature, turn off the auxiliary heating switch, and the drying oven will maintain a constant temperature automatically.

D. After using the instrument, open the door to release the hot air inside the chamber, disconnect the power, and wipe dry with a cloth.

Precautions

When using a new drying oven or one that has been unused for a long time, check for damage and perform insulation resistance tests. The insulation resistance between all live parts and the casing and between each other should be greater than 2 megaohms. Ensure the drying oven and power connector are secure to avoid damage due to poor contact. Do not place flammable materials inside the oven to prevent accidents.

Due to the high power of this equipment, it is strongly recommended that users connect a 32A circuit breaker in series with the power supply to prevent circuit damage and avoid safety hazards.

The load-bearing strength of the shelves varies by model. Do not place overweight items on the shelves. Use stainless steel trays to carry items to distribute the load points and avoid deformation of the shelves caused by excessive point load.

Troubleshooting