Product Details

JK-WBN Series New Thermostatic Water Bath(Economy)

I. Scope of Application:

It is used for precise temperature keeping and auxiliary heating by industrial and mining enterprises, colleges and universities, scientific research institutes and various labs, etc.

II. Specification

Item no.	140339	140340	140341	140342		140343		140344
	Economy			Luxury
Model	JK-WBN-150A	JK-WBN-300A	JK-WBN-600A		JK-WBN-150B		JK-WBN-300B	JK-WBN-600B
Voltage	AC220V±10%, 50Hz~60Hz
Input power	300W	500W	800W		300W		500W	800W
Temperature range	RT+5℃~99℃						RT+5℃~99℃
Display screen	LED				Display screen
Temperature stability	±0.5℃				±0.3℃
Resolution	0.1℃
Timing range		0~999min
Volume	5L	13L	28L		5L		13L	28L
Interior dimension LWH (mm)	300150150	295235200	495295200		300150150		295235200	495295200
Dimension LWH (mm)	550250220	580320270	800500300		550250220		580320270	800500300
Package size(mm)LWH	650350320	680420370	860550400		650350320		680420370	860550400
N.W	11kg	11.8kg	17.4kg		11kg		11.8kg	17.4kg
Price RMB/USD	1250/198	1500/238	1800/290		1450/230		1700/270	2000/318

III. Structural Description:

1. It has a stainless inner layer and the cover can be removed at random.

2. The temperature control is via the high-precision temperature control instrument. And the temperature control is precise and reliable.

3. Digital display. microcomputer controlled.

IV. Usage:

1. Fill clean warm water into water tank up to 1/2 ~2/3 of the full height.

2. Set the power switch to “ON” and then figures will appear on the temperature control instrument panel, indicating the power supply is on.

3. Set temperature, When the measured temperature reaches the set temperature, the heating will be interrupted and the heating indicator will go out, and the temperature will become stable after 60 minutes of temperature keeping. If the temperature in the water tank exceeds the set temperature over 2 °C(alarm temperature can be set arbitrarily), the alarm indicator of the temperature control instrument is on and the power of the heater will be automatically switched off in the meantime.

Symbol	Name	Setting range	Description	Factory set value
AL	Alarming setting	0-Full Range 0.0-Full Range	When temperature is beyond SP+AL,the ALM indicator turn on. The buzzer sounds and the heating power turn off.
CL	Refrigeration control setting	0-Full Range 0.0-Full Range	When the temperature less than SP+COL, the refrigeration point is turn on to drive the compressor.	without this function
P	Proportional Band	1-Full Range 1.0-Full Range	Proportional control action. If P is larger, then the gain of system is lower. It only use on the heating side.
I	Integral Time	0-3600 seconds	Integrated time constant. I larger, then the integrated action is smaller.
D	Derivative Time	0-3600 seconds	Derivative time constant. D larger, then the derivative action is also larger D can overcome overshoot. I=0and D=0 is called half proportional control.
Ar	Overshoot Control(re-setting)	1-100%	At on-off PID control, the value of Ar is a constant which equals 1.5-2times of the ratio of on time to the on-off period in the equilibrium state, In the half proportional control, the Ar equals coefficient/P.
T	Heating period	1-300seconds	For the thyristor output it is abut 1-3seconds.For those equipment that the superfluous power provided is comparatively larger, select larger T would decrease the stable error caused by PID control.
Pb	Zero point adjust (intersection)	-100-100 -100.0-100.0	When the zero error comparatively smaller and the full point error comparatively larger, to update this value should be needed. Ordinary for pt100 ,updating this value is rarely needed..
PK	Full point adjust(intercept)	-1000-1000 seconds	When the zero error comparatively larger and the full point error also comparatively larger, to update this value should be needed. PK=4000×(setting value-actual value)/actual value. For pt100 adjusting this value is need at first time.
Ct	Refrigeration control Time delayed	0-3600seconds	When measuring value reaches its alarm value, the alarm relay output will be +delayed this time…	Without this function
dp	The decimal point setting	0;1	When D=0 the display resolving power is 1°C and when DP=1 the display resolving power is 0.1°C
rH	The range setting	0- 400°C 0.0-400.0	Adjusting rH can make the instrument range equals 0-rH(°C)
LK	Password key	0-255	When LK=18 the parameters listed above then the above parameters can be updated.

V. Precautions

1. The shell of the water tank shall be grounded effectively to guarantee the safe use.

2. Before filling water, never press down the power switch so as to prevent the electrical heating tube from being burnt.

3. When any sound and light alarms are sent out from the water tank, please check whether the set temperature deviates from the normal range or not; if not, stop use and invite the professional personnel to inspect it or hand it over to our factory for repair.

4. Unless necessary, never disassemble the side plate of the temperature control unit so as to guarantee the safety

VI. Maintenance

1. Always keep the internal and external of the water tank clean; do not wipe the shell with the chemical solution, which can cause chemical reaction, to prevent any chemical reaction.

2. If the instrument is not to be used for a long time, cover it with a plastic thin film dust shroud and place it in a drying room so as to prevent the temperature control instrument from being moisturized and out of use.

3. The instrument is not suitable to be used in the environments of high voltage, heavy current, intense magnetic field or corrosive gases to prevent the instrument from being damaged by intervention and prevent the persons from the risks of the electroshock.

VII. Failure Handling Methods

Problems	Causes	Handling methods
1. No supply	1.The plug is not inserted well or the wire is disconnected.	1. Insert the plug and connect the wire.
1. No supply	2. Fuse is open.	2. Replace the fuse.
2. The temperature in the cabinet does not increase.	1. The set temperature is low.	1. Adjust the set temperature.
	2. The electric heater does not work.	2. Replace the electric heater.
	3. The temperature control instrument does not work.	3.Replace temperature control instrument.
	4. The cyclic fan does not work.	4. Replace the fan.
3.The set temperature has a big difference from the temperature in the cabinet.	1.The temperature sensor does not work.	1. Change temperature sensor.
	2.The fine tuning potentiometer for setting temperature is not adjusted well.	2. Adjust the potentiometer.
4.The over-temperature alarm is abnormal.	1. The set temperature is low.	1. Adjust the set temperature.
4.The over-temperature alarm is abnormal.	2.The temperature control instrument does not work.	2. Replace the temperature control instrument.