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Summary of Contents for Omega CL551
- Page 1 CL551 Portable Temperature Calibrator...
- Page 2 European New Approach Directives. OMEGA will add the CE mark to every appropriate device upon certification. The information contained in this document is believed to be corrected but OMEGA Engineering Inc. accepts no liability for any errors it contains, and reserves the right to alter specifications without notice.
- Page 3 OMEGA makes no warranty of any kind, expressed or implied, with regard to the documentation contained in this book. OMEGA shall not be liable in any event - technical and publishing error or omissions - for any incidental and consequential damages, in connection with, or arising out of the use of this book.
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Page 4: Table Of Contents
TABLE OF CONTENTS GENERAL PERFORMANCE....................... 5 Specifications ..............................6 GENERAL FEATURES........................7 Temperature stability............................7 Application flexibility ............................7 Internal digital indicator ............................ 7 External digital indicator ........................... 7 Digital interface ..............................7 PHYSICAL DESCRIPTION........................8 FUNCTIONAL DESCRIPTION......................9 PRE-OPERATIONAL CHECK ......................10 Unpacking .............................. -
Page 5: General Performance
• thermostats • gas filled thermometers • mercury thermometers • material thermal test CL551 has been designed using the most advanced thermal and electronic technologies to provide high stability and accuracy with easy operation combined with a powerful operating flexibility. -
Page 6: Specifications
Specifications • Range: from ambient temperature to +550 °C (standard) • Stability: ±0.05 °C at 450°C • Stabilizing time: 10 min. • Heating rate: 20 °C/min • Cooling rate: from 10 to 25°C/min • Radial uniformity: ±0.2°C at 450°C • Axial uniformity: ±0.8°C at 80mm •... -
Page 7: General Features
External digital indicator When high accuracy is required, the portable temperature calibrator CL551 can be used in combination with high accuracy indicator and an external high accuracy calibrated resistance thermometer (ask for the pertinent literature). Digital interface The calibrator is standard equipped with a full bi-directional RS232 digital interface for any communication with a Personal Computer. -
Page 8: Physical Description
PHYSICAL DESCRIPTION The CL551 portable temperature calibrator consists of two modules mechanically and electrically interconnected. The module on the left incorporates the heater, the thermal equalizing metal block, the resistance temperature sensor and a modulated air blower. The module on the right is endowed with an alphanumeric dot matrix LCD display with a backlight device, a microcontroller mother board with all base functions, an operator keyboard, a power package. -
Page 9: Functional Description
FUNCTIONAL DESCRIPTION The CL551 portable temperature calibrator functional block diagram is shown below. Mains supply 110 or 220V External Standard Sensor RS 232 INTERFACE POWER SUPPLY Equalizing Block Peltier cells KEYBOARD A/D COVERTER MICROCONTROLLER Internal reference sensor POWER DRIVER SWITCH TEST... -
Page 10: Pre-Operational Check
Inspect the instrument from scratches, dents, damages to case corners etc. which may have occurred during shipment. If any mechanical damage is noted, report the damage to the shipping carrier and then notify OMEGA directly or its nearest agent, and retain the damaged packaging for inspection. -
Page 11: Thermocouple Wires
Thermocouple wires When making measurements where additional wires have to be connected to the thermocouple leads, care must be exercised in selecting these wire types, not only when they are claimed to be of the same composition as the thermocouple involved, but, also, of the same "quality". Performance results, where high precision is required and in circumstances where some types of thermocouple wire leads are added to the original installation, should be reviewed carefully for the impact of the choice of the additional wire leads. -
Page 12: Safety Recommendations
SAFETY RECOMMENDATIONS • Since the CL551 temperature calibrator is a transportable instrument also designed for field use, make sure that the mains line socket is correctly grounded. • During maintenance and repair operations make sure that the equipment has cooled down and has been disconnected from the mains line supply. -
Page 13: Operatlon & Application
OPERATlON & APPLICATION Calibration by comparison To verify or calibrate a temperature sensor by comparison with an internal or external Pt100 standard follow the procedure indicated below. For correct operations strictly follow the following recommendations: • Measure the outside diameter of the sensor to be tested. •... -
Page 14: Calibration Using An External Standard Pt100 Sensor
Internal Pt100 185.0 Recommended 40.0 Dept 7.1.2 Calibration using an external standard Pt100 sensor • Start the calibration procedure only at ambient temperature. • Insert both the sensor under test and the external standard Pt100 in the relevant holes of the thermal equalizing block and keep the sensing elements of the probes at the same depth as indicated in the figure below. -
Page 15: Power On
Temperature switch test CL551 has been designed for the set-point control of temperature switch. For this purpose, two terminals for the electrical connection to the thermostat under test are installed on the rear part of the instrument, while on the front side of it, a red LED indicates: −... - Page 16 Adjust the set-point of the thermostat to the test value (e.g.: 100 °C - see diagram). • Energize CL551. • Wait for the control routine to be done and adjust the SP to 95° C using the < > key.
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Page 17: Set-Up Procedure - 1St Level
SW/ON :xx.x is the value in °C to open the contact of the thermostat 95.0 °C SW/OFF: XX.X °C Set-up procedure - 1st level The 1st level of the set-up procedure allows the operator to modify , if required, the configuration of the following parameters: −... -
Page 18: Set-Up Procedure - 2Nd Level
23.5 °C units °F • Press the <F> key to enable or disable the Default parameter: 23.5 °C Def.Par.: 23.5 °C Def.Par.: • Press the <F> key to select the access key number for the 2nd level of the set-up procedure: 23.5 °C Key:... -
Page 19: P.i.d. Tuning
• Press the <F> key to enter the machine code selection: 23.5 °C Address: The machine code can be adjusted from 1 to 99. • Press the <F> key to select the page indicating the serial number of the instrument: 23.5 °C S/N:... -
Page 20: Maintenance
(either at component level or at board level). OMEGA engineers will give prompt support for any assistance request. -
Page 21: Storage
Pt100 internal sensor Heater Element Well Tweezers Pt100 external connector RS232 connector Transport handle Internal carpentry Rear carpentry Tuning container Storage Store the instrument in the original package, at a temperature from -30°C to +60°C, with R.H. less than 90%. -
Page 22: Communication
COMMUNICATION Communication Protocol CL551 is equipped with a RS232 bi-directional , half-duplex interface as standard. Baud rate is set at 9600 baud as default. You can modify it through keyboard selecting following rate : 300, 600, 1200, 2400, 4800, 9600 and 19200 baud. Transmission parameters are 8 bit length, no parity and 1 bit stop. Address can be modified through keyboard and it is set 1 as default. -
Page 23: Setting A Variable
For example, if the set point has to be set ( Variable index = 0 ) to 123 °C , supposing the instrument address to be 1: $1WVAR0 123\r ASCII code HEX $ code The answer of the CL551 will be as follows : * character Carriage return * character... - Page 24 List of Variable Index available Variable Index Correct Value Actual Setpoint decimal value Ramp : ON /OFF 1 for ON, 0 for OFF Second Setpoint decimal value Ramp gradient decimal value Resolution : 0.01° / 0.1° 1 for 0.01°, 0 for 0.1° Proportional band decimal value Integral time...
- Page 25 Authorized Return (AR) number immediately upon phone or written request. Upon examination by OMEGA, if the unit is found to be defective it will be repaired or replaced at no charge. OMEGA’s WARRANTY does not apply to defects resulting from any action of the purchaser, including but not limited to mishandling, improper interfacing, operation outside of design limits, improper repair, or unauthorized modification.
- Page 26 Where Do I Find Everything I Need for Process Measurement and Control? OMEGA…Of Course! TEMPERATURE Thermocouple, RTD & Thermistor Probes, Connectors, Panels & Assemblies Wire: Thermocouple, RTD & Thermistor Calibrators & Ice Point References Recorders, Controllers & Process Monitors Infrared Pyrometers PRESSURE, STRAIN AND FORCE Transducers &...
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