Congratulations! You have made an excellent choice. WIGGENS thanks you for the trust you have placed in us. This operating manual has been designed to help you gain an understanding of the operation and possible applications of our instruments. For optimal utilization of all functions, we recommend that you thoroughly study this manual prior to beginning operation.
When you unpack your new Hot Plate/Stirrer for the first time, check the packing list to make sure you have received everything you should have. If there is anything missing or damaged, call the dealer form whom you purchased or contact us by E-mail: info@wiggens.com 3. Installation 1.
WIGGENS Infrared Hot Plate/Stirrer WH280 4. Specifications 4.1. WH 280-AH / WH280-NH / WH280-H Model WH280-AH WH280-NH WH280-H Order No. W3012801 W3012802 W3012803 Maximum temperature setting [℃] Maximum temperature setting with E-sensor [℃] Sensor in medium detection Safety temperature [℃]...
Operating Manual RS-232 interface Enable connecting the unit to a PC for operating 4.2. WH280-R / WH280-RL Model WH280-R WH280-RL Order No. W3012805 W3012806 Maximum temperature setting [℃] Maximum temperature setting with E-sensor [℃] Sensor in medium detection Safety temperature [℃] 50~500 adjustable 50~500 adjustable High temperature protection [℃]...
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WIGGENS Infrared Hot Plate/Stirrer WH280 RS-232 interface Enable connecting the unit to a PC for operating...
Operating Manual 5. Cautions 1) Voltage use not higher or lower 10% of the voltage specified on the nameplate, which is on the backside of the instrument. 2) Keep the power cord and sensor cable away from the hot plate while heating. 3) Put the container and liquid suitably on the top plate before operating the instrument.
WIGGENS Infrared Hot Plate/Stirrer WH280 7. Operation 7.1. Environmental Operating Conditions The Hotplate / Stirrer must operate in the following conditions: ⚫ Indoors ⚫ Altitudes not up to 2000 meters ⚫ Temperatures from+5°C to +40°C ⚫ Maximum relative humidity 80% for temperatures up to +31°C, linear decrease down to 50% relative humidity at a temperature of +40°C...
Operating Manual 7.3. Operation interface 7.3.1. Main display Touch screen lock automatically without any operating for 30 seconds. Timer for start or stop heating Rotation speed display Left arrow, press to enter menu display Rotation direction indicator Press this icon to start/stop rotation Rotation speed, tap to change speed setting.
WIGGENS Infrared Hot Plate/Stirrer WH280 7.3.2. Menu display Press left arrow icon to enter menu display Operation mode Temperature control Rotation setting Alarm beep setting Temperature unit Timer Sensor calibration Communication port setting 7.3.2.1. Operation mode Tap on the icon or turn and press the right knob to enter into the operation mode. There are two mode options to operate the device.
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Operating Manual 7.3.2.2. Temperature control Tap on the icon or turn and press the right knob to enter into the temperature control. Safe temp is the maximum temperature of the device. If the temperature sensor gets the value, the device will stop heating. ΔT is the difference between the set value and actual value.
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WIGGENS Infrared Hot Plate/Stirrer WH280 7.3.2.4. Beep Tap on the icon or turn and press the right knob to enter into the alarm beep menu. Audible alarm can be set or disabled in this menu. Tap on ON or OFF icon or turn the right knob to choose between the two icons. ON means audible alarm is activated and OFF means that there is only visual alarm is available when the alarm is triggered.
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Operating Manual starting heating. When the timer comes to the end, the device will stop heating automatically. You can choose if the device stop or continue the stirring. Call up stop stirring, choose Yes. Tap on No icon to choose to continue stopping stirring, when the heating finish with the timer coming to the end.
WIGGENS Infrared Hot Plate/Stirrer WH280 7.4. Temperature and speed graph In the main menu, tap on the right arrow to enter into curve graph. The temperature and curve trend shown on the display provides information about how the temperature is regulated through curve graph. The user can choose to display only one parameter from Temp and Speed or show the two parameters trend.
Operating Manual 7.5.1. RS-232 interface The RS-232 interface uses automatic identification. Parameter settings are as follows: Baud: 4800~19200 bits/second Data bits: 8 Stop bits:1 Handshake: None Parity: None List of commands Item Input / output Content of "#" Explanation Remarks Set the equipment parameters ℃...
WIGGENS Infrared Hot Plate/Stirrer WH280 7.5.2. RS-485 interface The modbus protocol use 16-bit registers for data transmission with RS-485 serial port. Data that use more than 16 bits must be divided into several register. For values that are divided into several registers, the registers are arranged according to the Modbus format.
8.2. Maintenance Do not attempt to service or repair a WIGGENS hot plate / stirrer. If the hot plate / stirrer housing is opened the warranty becomes void. Contact WIGGENS for return authorization and return instructions. Only qualified personnel are authorized to perform configuration, installation, maintenance and repairs of the instrument.
Change the ΔT to a bigger value. ΔT setting value Contact Wiggens service engineer Er11 K-thermocouple sensor faults Contact Wiggens service engineer. WIGGENS reserves the right to carry out technical modifications with repairs for providing improved performance of the instrument.
10. Warranty and Product Liability 10.1. Warranty WIGGENS warrants the herein described product of its manufacture for one year from receipt of the equipment by the purchaser, against defects in material and workmanship. Warranty registration is available on-line. Point your browser to (www.wiggens.com) or fill out the supplied warranty registration card.
WIGGENS Infrared Hot Plate/Stirrer WH280 Confirmation of condition of unit In the case of repair, copy and complete the Conformation of condition of unit and send it to WIGGENS Instruments. 1. Details about the unit Product number Serial number Reason for repair 2.
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