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and cover the plastic protective cover, put it in a dry room for avoiding the damage of parts 
and affecting the use result. 

11. Problem solution

Phenomenon 

Reassons 

Treatment 

No power supply 

The socket has no power 
supply 

Check the line and change 
the socket 

The socket isn

’t plug well or 

the wire is broken

 

Change the plug and 
connect the wire well   

Fuse is open cirvuit 

Change the fuse 

The power is not switch on 

Switch on the power 

The temperature in the box 
isn

’t rising

 

The setting temperature is 
low 

Adjust the setting temperature 

The electric heater is wrong 

Change heater 

The temperature controller is 
wrong   

Change the temperature 
controller 

The temperature sensor 
loosened 

Screw the connecting nut 

The error between the setting 
temper ature and temperature 
in the box is big 

Damage of sensor 

Change the temperature 
controller 

Temperature is out of 
control 

Change the temperature 
controller 

Fix the sensor well 

The temperature controller is 
wrong 

Change the temperature 
controller 

Summary of Contents for DVO Series

Page 1: ...tion manual may make changes and improvement in the future there will be not the notice please understanding If found abnormal phenomenon in the process of use please do not hesitate to contact our co...

Page 2: ...ts 1 Safety instruction 2 Application 3 Structure 4 Working condition 5 Technical parameters 6 Instrument operation 7 Display instructions 8 Wiring 9 Points for attention 10 Maintenance 11 Problem sol...

Page 3: ...ull the plug 3 When the instrument is not used for long time must pull the plug 2 Application It is suitable for drying and heating articles in vacuum conditions in the laboratories of industrial and...

Page 4: ...e has square workroom 1 Vacuum gauge 2 LED light switch 3 PID temperature controller 4 Power switch 5 Vacuum valve 6 Inert gas inlet valve 7 Observation window 8 Door handle 9 Leakage protection switc...

Page 5: ...parameters Model DVO 25 DVO 53 DVO 91 DVO 215 Power Voltage 220V 380V Power 500W 1400W 1500W 2100W Material Case Steel with epoxy powder coating Chamber Stainless Steel Temperature Heating method 4 s...

Page 6: ...ge 1 Put the articles need to be dried in the oven close the oven door and screw the handle close the return air valve and open the vacuum valve connect the airway at side of oven body with vacuum pum...

Page 7: ...erature could not lower than 50 If it is lower than 50 the value measured by standard thermometer is different with the display value of meter that is normal It could not affect the temperature contro...

Page 8: ...ructions 1 Function key SET 2 Shift key Press and hold for 5 seconds to self tuning 3 Minus key Sound attenuation 4 Plus key see heat preservation time 5 heating symbol 6 alarm symbol 7 set self adjus...

Page 9: ...up time shows in minutes In case of power failure the previous timer is invalid When the caller calls start the timer from zero again 4 3 Time setting up function According to the first menu in Table...

Page 10: ...nal belt 0 999 Heating rate 500 3 Integral 0 999 Integral time 150 4 Differential 0 999 Differential time 250 5 Period 0 120 Output time by second and the period is the differential 1 13 20 6 Sensor c...

Page 11: ...8 Wiring 72 72 DFD SCR output Relay output Voltage output Zero crossing trigger...

Page 12: ...Relay output Voltage output 48 48 DFG...

Page 13: ...96 96 DFA...

Page 14: ...it in the sir when the temperature cooling the lower then ignition point for acoiding the combustion from reaction 4 There is no emplosion protection equipment in the cacuum dry box Don t put the infl...

Page 15: ...r is not switch on Switch on the power The temperature in the box isn t rising The setting temperature is low Adjust the setting temperature The electric heater is wrong Change heater The temperature...

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