WSWK-5 microcomputer temperature control instrument

Its main technical indices:

1.Control mode：using single chip as the core, automatic correction of temperature measurement, automatic phase-shift trigger thyristor control
2.measuring range: 0-1200 degrees C, resolution 1 degree C, with K value of ?thermocouple ?
i3.me ranges: 0-999min automatic grading.
4.The measurement error is less than 3 degrees: C
5.Timing error: less than 6s/24h
6. Power supply voltage: 220V + 10%, 50Hz
7.The maximum load power: 5KW
8.Instrument power: 10W
9.Instrument size: 305 x 120 x 390mm
10.The use of the environment: 0-40 degrees, relative humidity is less than or equal to 80%
11.Continuous working time: 24h

he rear panel and installation instructions
1.The power supply should have enough wire diameter, external 20insurance.?

4.According to the rear panel (Figure 1) indicating connect the power line, line of the furnace body, thermocouple.


schematic diagram of rear panel

The front panel description:
(1)display
Eight digital tube display windows three. The first window display program,a digital tube. Second display window shows the time resolution of automatic sorting, before the decimal point to points, the decimal numberis 10s, three digital tube. Third display window shows the temperature, the resolution is 1C, four digital tube. A light emitting display working state,light shows the selected program has begun to work into the experimental condition. (see Figure two).

?(2)the keyboard
There are 16 key. Are 10 digital / function keys. 5 a function key and areset key. The number of
Word / function keys, number keys in the set condition is, in other states for the function keys。

Schematic diagram of the front panel

[0/ SLOW ASH] key: select the process selection of slow ashing method test.
[1/ FAST ASH] key: select the process selection for rapid ashing method test.
[2/ R.I.] process selection of Roga index test.
[3/ VOLATILIZE] key: selected process choose 900 degrees volatile test
[4 VOLATILIZE] key: selected process choose 850 degrees volatile test.
[5 OPTIONAL ] button: constant temperature test set.
[6/ OPTIONAL ]button: constant temperature test set.
[7/MEASURE ]measurement of key: test only measurement of temperature.
[8/CANCEL] button: can celled by [9/STARTUP ] start test button to start.
[9/STARTUP ]start button: used for fast ash, Roca, volatile until the timing start test after preheating lofting.
[START] key: by remote state into the experimental condition, began to run the selected program.
[END] button and start button: corresponding, from test status back to there mote state.
[SWITCH] key: in the setting state switching window. In the setting of stateon a program process and heating electric
Flow to view a few seconds. In the time window displays the program process, in the temperature window shows the current heating
Flow.
[MODIFY] key: enter the set state from the election process, you can modify the parameters.
[OK/ERASURE] button to determine the silencing the keyboard in the state of new input parameters can be set, the determined parameters power still have the memory of. For silencing of prompt sound in the test state.
[RESET] key: generally this key is not used, press this button on the controller is not working properly.

The operating instructions:

(a) status description
1 . selection process state: turn on the power switch that enters this state.At the time of the experiment according to the [End] key also entered This state. The program window flashing display program, the time window and the temperature window corresponding to display the main parameters.Through digital / the function button to select the [0/slow grey], [1/fastash], [2/, [3/, volatilization of Roga]] [4/ waveHair], [5, [6 Optional Optional]], [7/ measurement] any program.
2 . set state: in remote state selected program, such as the parameters ofthe program can modify, press [setFixed keyboard enter the set state, effective digital keyboard. The number keys on the display window parameter flashing. Into the modification. By switching the switch key is [] temperature windowflashing or flickering time window. Time parameter values before the decimal point to divide, the decimal number of seconds. Numericalparameters and time parameters of the modified,
Only through the [OK] button can enter and memory. Parameters ofpower-off memory will not lose.

3 . experiment: in the selection process of state state selected program, the start button start the application by [, into theTest. "Start" indicator light (fast ash, Roca, volatile test, press [9/ to start]after
The indicator light flashing) this state will be in accordance with the procedural requirements of temperature control, automatic measurementof time Timing and the heating current is measured, you can view the program process and heating by [switch] key Current (a few seconds in the time display program, display process ofheating current in the temperature window), can automatically judge
Fault alarm, a variety of fault number display.

(b) the operating instructions
1 slow ashing method (referred to as slow ash) operation:
2 rapid ashing method (referred to as fast ash) operation:
1) operation: select [1/ fast ash] program in the remote state, click the start button, the furnace body began to heat up, the temperature rose to 850 degrees, into the cupel, close the door, press
[9/ to start]The key, the start of the experiment.
2) Note: muffle furnace heated to 850 degrees, open the door, put a cupelheat-resistant porcelain
Plate or asbestos board slowly into the muffle furnace, make coal sample ashing in the first row cupel.
Until 5-10min after the coal sample is not in the smoke, with every minuteof not more than 2mm the speed of two,The three or four row of the cupel sequence into the furnace temperaturepart (if the coal sample ignition deflagration,The test should be scrapped). Shut the oven door burn in 815 degreetemperatures 40min
3) process in the selection process by [1/ fast ash] button, parameters cannot be modified.
Display: [1 040 0815]
Process 1: from low temperature to 850 degrees warming process, display the current time and temperature.The temperature reached into the process automatically after 2, voice prompt. [expletive] key silencing.
Process 2: in 815 degrees thermostatic, waiting for lofting start. Lofting process temperature control is still 850 degrees,Display the waiting time and the current temperature. Setting out after,press [9/ to start] button to enter the process 3. No prompt.
Process 3: in the 815 degree temperature 40min. After the time to automatically enter the process 4.
Process 4: fast ash to complete the whole process, alarm, display "END",press the [expletive] button to eliminate Sound the alarm. In the 815 degree temperature. Can [End] button to return to the remote state.
3 Roga (bond) index (referred to as Roga) operation:
1) operation: select [2/ Ticonderoga] program in the remote state. Click the start button, until the oven to 850 degrees, into the crucible, press [9/ to start the]^ keyboard, the start of the experiment.
2) Description: the crucible with cover will be placed in the crucible holder,with the flat shovel up crucible with handle Frame, into the preheating to 850 degrees thermostatic region in the muffle furnace. In place of the crucible after Within the 6min, the temperature should be restored to 850 degrees, after temperature should be maintained at 850 plus or minus 10 degrees, from the start timing into the crucible coking end, 15min.
According to [2 of Roga] in remote state key. Parameters can be modified.
Display: [1 T3 C] (non automatic tracking mode, can enter the set state)
Or: [2 T3 Auto] (automatic tracking mode, can not enter the set state)
T3: the complete guide the 3min through heating time after start.Numerical range 0-3min.
C: preheating temperature. The numerical range of 850-890 degrees
Because the experimental temperature of 6min recovery and 15minrequires constant temperature, heating conditions and 6min temperature recovery depends mainly on the former 3min. If the temperature inside the 6min recovery less than or more than
850 + 10 degrees, can improve on the T3 or C settings. The range of T3 value 0-3minC
The value range of 850-890 degrees. Please refer to "set condition setting method".
In the non automatic mode, press the [2/ key and select automatic Roga]that way.
Automatic mode: according to the temperature error of the 6min temperature recovery, automatically calculate the next time Continuous experimental T3 values. The new T3 value does not do the power failure memory, only for continuous use next time. Preheating Temperature has been set value by C
Process:
Process 1: after the process of selection according to the [start] key to start the process of 1, from low temperature to C process of heating time and temperature, display the current. The temperature reached into the process automatically after 2, voice prompts, [expletive] key silencing.

3: begin 15min timing, constant temperature point is 850 degrees.Firstly the 3min ,recovery control,
Then the constant temperature control. To 6min, ultra poor judgment,Such as ultra difference alarm display 'Err3' (can be censored), such as automatic method will compute the new T3. To 14min40s, voice alarm(noise silencer),Remind the lab technician to 15min automatically after the entry process4.

4 volatile (referred to as volatile 3) operation:
Operation: 1) in selected state, select [3/] [volatile program, press start button],The furnace body began to heat up, the temperature rose to 920 degrees,into the crucible, press the [9/] button to start the start of the experiment.
Description: 2) pre heating muffle furnace to 920 degrees or so. Open the door,Rapid will be placed Crucible shelf into the constant temperature zone to shut the door,accurate heating 7min. crucible and shelf just put In the following, the furnace temperature will decline, but must be in 3min inside the furnace temperature recovered to 900 + degrees,Otherwise, this experiment is invalid.
Process: [3] T3 C (non automatic tracking mode, can enter the set state)
Or [3] T3 Auto (automatic tracking mode, can not enter the set state)
FULL guideT3: after the start of the former 3min within the range of values of 0-3min through heating time.
C: pre heating temperature range 900 degrees -940 degrees.
Because the experimental temperature of 3min recovery and 7minconstant temperature requirements, and 3min Heating temperature recovery depends mainly on the former 3min, if the temperature inside the 3min recovery less than or more than 900 plus or minus 10 degrees, may through the T3 or C settings. The range of T3 value 0-3min, C range of 900 degrees -940 degrees, see "setting condition setting method".
In the non automatic mode, press the [3/] button to select automatically the volatilization. Then press the [3/] volatile The keyboard and the automatic mode is selected.Automatic mode: according to the temperature error of the 3mintemperature recovery time,
Automatically calculate the next continuous experimental values of T3.The new T3 value does not make the power failure memory, only for the use of the next experiment continuous.
3) process:
Process 1: process according to the [start] Select after the button that started the process of 1,
The process from low temperature to C, show the heating time and the current temperature.
The temperature reached into the process automatically after 2, voice prompt. [key] silencer silencer.

Process 3: start 7min timing, constant temperature point is 900 degrees to 3min recovery control,
Then the thermostatic control. To 3min, temperature ultra poor judgment,Such as ultra poor both alarm display 'Err3' (can be censored), such as automatic method will compute the newT3, to 6min50s, voice alarm (can be censored) prompt laboratory technician.The 7min automatically after the entry process 4.

5 volatile (referred to as volatile 4) operation:
4 and 3 volatile volatile except the constant temperature point is different,its operation in exactly the same way List only the relevant parameters. Therefore, the operating process of volatile 3 reference.
Preheating temperature: 870 + 20 degrees, a temperature: 850 + 10 degrees

6 optional operation procedure:
This controller has two independent process the same optional procedure:[5/] and [6/] Optional Optional
Key, optional automatic procedures can be heated to the set temperature,Automatic constant temperature and temperature in the set time,Parameters can be modified.
Display: [3] Th Ch
The Th: constant temperature time. Unit: Nin, 0-999min range, resolution 1min.
The Ch: constant temperature: 0-1200 degrees
See "setting mode setting state"
2) process:
PROCESS1: process according to the [start] Select after the key to start the process of 1, from low temperature to Ch process. Display the current temperature and heating time. Constant time know into 3 arrival process.
Process 3. Complete an optional program, alarm display 'End' (noise silencer).
If no keyboard operation, will continue to Ch for constant temperature constant temperature, and wait for the operation.At this time, can press the [start] button to enter The process of 1, the beginning of the next test.

7 measurement program operation
The program selection and start, only measurement of the muffle furnace temperature, not without heating temperature control,Some mistakes can judge the fault.

Five, fault phenomenon:

The instrument can identify multiple fault phenomenon, and give the alarm, so as to help the operation and maintenance The explanation is as follows:
That shows that significance
Reverse Err1 thermocouple
Err2 thermocouple open
Err3 3min/6min temperature super bad
Err4 muffle furnace wire broken
Err5 thyristor out of control
First, further instructions about fault phenomena.
Err1: instrument to collect temperature signal negative. The reason is probably the the rmocouple reverse,
Thermocouple connection has strong interference or instrument under strong interference. Can be reset or power failure check.
Err2: instrument to collect temperature signal is large. May not connectedor thermocouple, thermocouple
Bad contact line.
Err3: volatile test, 3minsuperhigh temperature difference. Or the Roca index test, 6minSuperhigh temperature difference. Through the mute button to eliminate the alarm.
Err4: that is a larger trigger, and the current is too small or no,
May be the muffle furnace
Silk has been broken, a bad connection, SCR damaged open.
Err5: description of SCM not issued or send trigger is very small, and had larger electric
Flow, may be SCR short circuit damage.

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