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This drying oven is used in biology, chemical pharmaceutical, medical treatment unit, industry and mining enterprise, universities and colleges, and scientific research for drying, melting wax, sterilizing, and disinfecting

Principle and structure

• The heating tube is at the back of the inner chamber, the fan is in the back of chamber, temp.
• The controller controls the constant and change of temperature,
• The airflow inflows the inner chamber via a heating tube, and the function of the fan is to make the inside temperature more uniform.
• arc-design, shelf space can be adjusted, built-in temp. probe.
• Wool rock is the thermal insulation material between the working chamber and the shell,
• The shell is made of steel plate, the shell is dealt with spray paint,
• The inner chamber is made of zinc-plating or stainless steel the observation window is made of double-tempered glass silicone door seal to make sure better sealability, and enhance the stillstand performance of the inner chamber.
• This drying oven is equipped with intelligent temp. control system. (with timing function and precise temp. control)

Use method

Make sure the switch is in the “off” position before power on, check whether it is a broken circuit or leakage, connect the power, turn on the power switch

Panel display

Indicator

1.” RUN/AT” indicator:

It is on when running, it is out when over flashing when auto-setting

2.” OUT” indicator:

It is on if there is heating output, or it is out

3. “ALM” indicator:

It is on when over-temperature is alarming, or it is out

4. WL and WH is an invalid indicator

Operation and use method

1) When power is connected, the upper screen displays “InP”

• the lower screen displays “scale value”, it will enter normal status after 3 seconds

2) The reference and setting of temperature and soaking time

A: if no timing function

• Press the “set” key, to access temperature setting mode, and the lower screen displays “SP”,
• the upper screen displays the setting temperature (the units digit flashing first),
• then modify the needed setting value via shift,
• increase and decrease key; press the “set” key again to log out of setting mode, and the modified setting value will be saved automatically.
• It will return to the normal display mode without pressing any key in one minute.

B: if with timing function

• Press the “set” key, to access temperature setting mode, the lower screen displays “SP”, the upper screen displays the setting temperature (the units digit flashing first),
• then modify the needed setting value via shift,
• increase and decrease key; press the “set” key again, enter the setting mode of soaking time,
• the lower screen displays “St”, and the upper displays the soaking time setting value (the units digit flashing first),
• Press the “set” key again to log out of setting mode, the modified setting value will be saved automatically when the soaking time is set to “0”, it means without a timing function, the controller runs continuously, and the lower screen displays the set temperature;
• when the setting value is not “0”, the lower screen displays the running time or setting temperature, the last decimal point is on, after the measured temperature reaches to setting temperature, the timer starts timing, the decimal point is flashing, time is up, running stops, the lower screen display “End”, with continuous beeper.
• after running is over, long press the “decrease /restart” key to reboot

3) There is something wrong with the sensor

• If the upper screen displays “——” it means there is something wrong with the sensor,
• If the temperature is outside of the measured range or the controller fails, the controller will disconnect the heating output automatically, the beeper keeps beeping and the alarm indicator is on, please check the temperature sensor and connection.
• When over-temperature alarming, the beeper beeps, and the “ALM” alarm light is on;
• when lower-temperature alarming, the beeper beeps, “ALM” alarm light is flashing, if a change in setting temperature results in an over-temperature alarm, the “ALM” alarm light is on, without the beeper

4) Press any key to mute

5) “Shift” key:

• press this key to modify the setting value.

6) “Decrease” key:

• Press this key to decrease the setting value, long press this key to continuously decrease the setting value

7) “Increase” key:

• Press this key to increase the setting value, and long press this key to continuously increase the setting value

8) in setting mode, without pressing any key within 1 min

• it will return to normal mode automatically

A) Auto-setting

Please proceed with auto-setting if the control effect of temperature is not ideal.

• if the temperature soaring seriously when auto-setting, take this factor into consideration fully before the user proceeds with system auto-setting
• Under non-setting status, long press “shift/At” for 6 seconds to enter auto-setting, and the “RUN/AT” light flashes, this light stops flashing after auto-setting is over, and the controller will obtain better PID parameters. and the parameters will be saved automatically.
• during auto-setting, long press “shift/At” for 6 seconds to stop auto-setting.
• When auto-setting, if it is over-temperature, the “ALM” alarm light is out, no beeper, but the heating alarm relay will be disconnected automatically.
• The “set” key is unavailable during auto-setting. when auto-setting, no matter whether there is a soaking-time setting, the lower screen always displays the set temperature.

B) Interior parameters

• Long press the “set” key for 3 seconds, and the lower screen displays the password prompt “Lc “, and the upper screen displays the password value, to modify the needed password value via increase, decrease and shift.
• Press the “set” key again, if the password value is incorrect, it will return to normal mode automatically if the password value is correct, then enter the setting status of the interior parameter,
• Press the “set” key again to modify the parameter in turn.
• press the “set” key for 3 seconds to log out and the parameters will be saved

Interior parameter -1

Parameter	Parameter name	Parameter function	(range) Factory default
Lc-	Password	When “Lc=3”, check and modify the parameter	0
ALH-	Over-temp. alarm	When test temperature > setting temperature, the alarm indicator is on, the beeper beeps, disconnect the heating output	(0.0~100.0°C) 20.0
ALL-	Lower-temp. alarm	When the test temperature < setting temperature, the alarm is on, the beeper beeps, disconnect the heating output	(0.0~100.0°C) 20.0
T-	Control cycle	Heating control cycle	(1~60 seconds) note: 1
P-	Proportion	Time proportion adjustment	(1.0~ scale) 35.0
I-	Integral time	Integral action adjustment	(1-1000 seconds) 200
d-	Differential time	Differential action adjustment	(0~1000 seconds) 200
Pb-	Zero adjustment	Modify error margins of the sensor (low temperature) Pb=actual temp.-test temp.)	(-12.0~12.0°C) 0.0
PK-	Full-scale adjustment	Modify error margins of the sensor (high temperature) PK=1000*(actual temp.-test temp.) /test temp.	(-999~999) 0

Note 1: the controller model is PCD-2xx2 (relay output), the Factory default of the heating control cycle is 20 seconds, and another model is 5 seconds

Inter parameter -2

Parameter	Parameter name	Parameter function	(range) Factory default
Lc-	Password	When parameter “Lc=9” check and modify	0
Co-	Turn off the heating output	When test temperature ≥ setting temperature +Co, Turn off the heating output	(0.0 ~ 50.0°C) 5.0
Hn-	Timing way	0: minute timing; 1: hour timing	(0~1) 0
rH-	Mileage value	The maximum value of setting temperature	(0~400.0°C) 300.0

The comparison table of English names and parameter prompt

Notice:

• if the user wants to reach the ideal control effect of temperature but without system auto-setting, give P、 I、 D initial value according to the below parameters of different equipment.
• if still can’t reach the ideal control effect of temperature, please proceed with system auto-setting

p (proportion)	(Integration)	D (differential)	Equipment style
35.0	200	200	Drying oven and oil bath equipment
15.0	200	200	Heating incubator
6.0	100	100	Water bath and water tank

Notice

1. The samples should not be placed too crowded, so as not to affect convection inside the chamber.

• Please connect the oven with a protective conductor terminal according to relevant regulations. in order to be safe, don’t touch the electrical circuit which is in the left oven with your hand and wet cloth

2. Don’t splash water on the observation door, or it may crack

3. Don’t use this kind of oven to dry inflammable, volatile, and explosive substances, or it may cause an explosion

Maintain

1. Drying oven should be kept clean,

• please use a cotton cloth to clean the glass door, in order to avoid a chemical reaction, do not use a corrosive chemical solution to sweep

2. If the drying oven is not used for a long period, in order to avoid corrosion,

• should be applied with neutral grease or vaseline in the electroplating pieces. and placed in a dry indoors

3. Please operate this oven according to our manual,

• if there is something wrong with this oven, please refer to the below solution

Wiring layout

Trouble shooting and Failure analysis and solutions

Trouble	Failure analysis and solutions
1. The equipment fails to work after power is connected	*There is something wrong with the power, ask an electrician for help *Heating wire burned out, test the two end resistance value of heat ware, if the resistance value is 0, It means that the heating wire is short-circuited, it occurs switch trip; if the resistance value is hundred Kohm or infinity, it means that the heat ware is an open circuit The power switch blade is off The power switch is on, check the control circuit board and cable
2. Temperature stops rising	* Check timing whether it is timing settings; *Most users do not understand the function, when reaching the timing value, the heating wire stops working, the fan fails to work, and the temperature stops increasing. * Check whether the fan is working, or fails (use a multimeter to test the voltage of the fan pin to whether it is 220V), then call us to send accessories to solve * Checking the control panel with a multi-meter to see whether there is output, according to the drawing; (Drawings attached).
3. Motor fails to run	Result: it is running, but the airflow is unable to circulate, leading to the temperature rising slowly, then contact us
4. Handle is broken	Replace and contact the supplier
5. There are differences between the temperature that the panel displays and the mercury temp.	premise: The thermometer needs to be tested whether it is qualified then to measure The installation position of mercury: hang the thermometer in the center of the chamber, avoid putting it on the shelf to measure Refer to the parameter adjustment table
6. Temperature appears to bounce * there  or keep stationary, or abnormal “—-“	* there is something wrong with the temperature sensor, should be replaced. Note: sensor adopts Pt100 platinum resistance

Drying oven

1) 2 shelves

Technology parameter

After-sales service

• (1) One-year warranty, lifetime service. and this product is warranted for a period of twelve months from the date of original purchase, please retain your receipt to establish proof of purchase!
• (2) Don’t dismantle, repair or refit equipment without authorization and guidance from our company. This warranty does not extend to the repair or refit of any products.
• (3) This warranty does not cover any damages which are caused by improper operation, improper power output, or improper cable connection.
• (4) If the product is located outside of china, during the warranty period, we will offer the parts for free. but not bear freight charges. If outside of the warranty period, you need to pay for the parts and the freight charge as well.
• (5) The warranty does not cover consumable parts, such as light lamps or glass doors, and so on.