DIGISYSTEM WB-500D User manual

DIGISYSTEM LABORATORY INSTRUMENTS INC. www.digisystemlab.com R EV.1-2017
INSTRUCTION MANUAL FOR WATER BATH WB-500D & WB-1000D
Warnings:
* The water in the tank is hot. Do not touch.
* Do not remove the machine during operation.
* Do not disassemble the machine by yourself. In the event of a malfunction, the machine should be
repaired by a qualified technician. Before repairing, turn off the power.
Steps:
1. Connect with power supply. Please make sure the power
voltage is the same as the voltage showing on the label stuck
on the back of machine. You may see the ‘Power indicator’
becomes red.
2. Pour pure water (or distilled water) into the ‘Tank’ until water
level covers a half height of the ‘Tank’.
3. Press ‘ON/OFF Button’, then you may see the ‘Power indicator’
becomes green. Wait for about 5 seconds; you can see from
the ‘PID Controller’, the present temperature value (PV) on the
upper row and setting temperature value (SV) on the lower
row.
4. Press ‘Up Key’ or ‘Down Key’ to adjust SV value and then press ‘SET Key’ to enter the value.
5. After finishing the work, please press ‘ON/OFF Button’ to turn off the power, and then the ‘Power
indicator’ become red.
Caution:
If water level is under the bottom of the ‘Temperature sensor’, you must pour water into ‘Tank’ to cover the
‘Temperature sensor’.
Maintenance and care:
1. Keep the machine clean all the time, so no routine maintenance is required. Cleaning can be done with a
damp cloth. Avoid the use of solvents as they may damage the product.
2. For a long time no use, please pour out the water. And dry the tank on a clean cloth.
Other functions:
Tank
Power
indicator
PID Controller
ON/OFF
Button
Temperature
sensor

DIGISYSTEM LABORATORY INSTRUMENTS INC. www.digisystemlab.com R EV. 1-2017
Note: Before executing other functions, please follow ‘5. Setting lock’ ( c )to release ‘LOCK’ status.
After executing other functions, please follow ‘5. Setting lock’ to set ‘LOCK’ status.

DIGISYSTEM LABORATORY INSTRUMENTS INC. www.digisystemlab.com R EV. 1-2017
Circuit Diagram:
Troubleshooting Guide
Caution: Always disconnect the power cord before troubleshooting.
Trouble Cause Remedy
Instrument inoperative
Power cord not connected to outlet. Plug instrument in..
Dead power output. Change to different output.
Current is overload, so the no fuse
breaker on the behind of themachine.
Push the button of the no fuse
breaker to reset
Control head can’t control
the water temperature
Sensor is broken Replacing a sensor
PID controller Replacing a PID controller
Heater is broken Replacing a heater
The key of PID controller
can’t work
The keys has been locked Please refer to page 2, Other
functions 5. (c) to release the
lock status.
Temperature is not stable The initial setting value is not suitable
for the ambient air temperature where
the machine is located
Please refer to page 2, Other
functions 4. to set auto-tuning
function to solve this problem.
PV value is not correct User’s calibration thermometer is
different from the factory’s calibration
thermometer
Please refer to page 2, Other
functions 3 to adjust PV value