http://www.omega.com e-mail: info@omega.
OMEGAnetSM On-Line Service Internet e-mail http://www.omega.com info@omega.com Servicing North America: USA: ISO 9001 Certified Canada: One Omega Drive, Box 4047 Stamford, CT 06907-0047 Tel: (203) 359-1660 e-mail: info@omega.com FAX: (203) 359-7700 976 Bergar Laval (Quebec) H7L 5A1 Tel: (514) 856-6928 e-mail: info@omega.
INTRODUCTORY NOTE ATTENTION: THIS MANUAL MUST BE REFERRED TO INSTRUMENTS WITH SERIAL NUMBER 005980 ONWARDS. This publication contains operating instructions, as well as a description of the principles of operation, of CL526 multifunction portable calibrator. This information covers all models of the instrument, including the basic equipment and its options and accessories.
TABLE OF CONTENTS 1 GENERAL PERFORMANCE ............................................................................................................... 6 1.1 1.2.1 2 Specifications ...................................................................................................................................................7 Table of ranges and accuracy.....................................................................................................................9 GENERAL FEATURES ..............
9.3.13.2 10 10.1 10.2 10.3 10.4 10.5 10.6 11 11.1 11.2 11.3 11.4 External Rj compensation .....................................................................................................................34 DIGITAL INTERFACE ........................................................................................................................ 35 Digital interface data program mode...............................................................................................................
1 GENERAL PERFORMANCE A complete system for testing, measuring and calibrating built in a single, compact portable instrument. The portable calibrator CL526 is a multifunction instrument designed to meet, in a modern and practical way, the needs of instrumentation engineers, both in laboratory and field work.
1.1 Specifications • IN/OUT parameters: - mV, V, mA, Ω - Tc type J, K, T, R, S, B, N, C, E, F, U, L, G, D - Rtd type Pt100, Ni100 and Ni120 • Reference junction compensation: - automatic internal with Pt100 sensor from -5°C to +50°C; - external with manual setting from -50°C to +100°C • Rj compensation drift: ± 0.015°C/°C • Rj compensation error: ±0.
• Calibration: semi-automatic procedure • Power supply: n. 4 Ni-MH batteries 1.25 V 1.
1.2.
2 2.1 GENERAL FEATURES Input and output flexibility Advanced flexibility of performance has been achieved using microprocessor technology. Each instrument, through a menu-driven procedure, allows measurement or simulation of mV, V, mA, Ω, or any normalized IEC, DIN and JIS thermoelectric sensor J, K, T, R, S, B, C, U, L, N, E, F, G, D, Pt100, Ni100 and Ni120. The microprocessor performs automatic polynomial linearization and cold junction compensation to assure high accuracy.
• • • 2.10 a continuous or step ramp output where the total time, the start point, the end point and the size of the step are requested by the set-up procedure to run the program; a manual repeat increment through keyboard; an automatic sequence of up to 60 stored values (20 groups of 3 memories). Case The case is designed for easy hand held operation and transportation. The body is injection moulded, shock-resistant ABS with internal metal coating .
3 PHYSICAL DESCRIPTION The CL526 portable calibrator consists of a rugged and compact case, a mother board with all base functions, a daughter board for the auxiliary functions, a tactile membrane keyboard, an LCD display and a group of four nickelcadmium rechargeable batteries. The internal surface of the case is metal coated to improve the characteristics of electrical noise shielding and thermal equalization of all internal circuits.
4 FUNCTIONAL DESCRIPTION The CL526 portable calibrator block diagram is shown below. External battery charger A Ni-MH Batteries Converters for backligh Reference junction Power supply Rj signals Digital interface Display A D/A (converter) Microprocessor Keyboard Signal OUT output signal Gain Control Comparator and buffer output signal IN/OUT Switch IN/OUT terminals • • • • • • • 4.
ON OFF IPTS68-ITS90 Rj <▲ ▲> <▼ ▼> STORE <← ←> <→ →> START END STEP MODE SOAK TIME 0, 1, 2 °C/°F SELECT AVERAGE IN/OUT CONVERT AUTORAMP PROGRAM X BATTERY ENTER SHIFT LAMP 4.3 Power ON switch Power OFF switch Temperature Scale selection Reference junction internal-external selection Membrane slidewires to set the simulation value (to scroll the menu of input tables and library of engineering characters).
The microprocessor recognizes if the D/A converter is generating a voltage signal higher or lower than the input signal and gives correcting instructions to keep the input amplifier output on the nearest value to zero. In the above conditions the microprocessor acknowledges the value of the input signal as equivalent to the setting of the digital to analog converter. µP D/A IN 4.
µP D/A 1000 mV x 1000 multipl. 100 mV Keyboard Out 54 mV 22 mV 4.8 Battery charger. Operation from line source ATTENTION: ONLY FOR USE WITH NI-MH BATTERIES. The auxiliary module, supplied as a standard accessory, allows operation from 110-120 Vac or 220-240 Vac 50/60 Hz. The calibrator, if needed, can be operated directly from a line source through the charger.
4.11 Resistance and Rtd simulation CL526 portable calibrator is equipped with an electronic circuit for the active simulation of platinum and nickel resistance thermometers and resistances. It is based on the assumption that the instrument to be calibrated will supply the excitation current to the sensor; this current must be between 0.2 and 5 mA ( typical working values ).
5 UNPACKING Remove the instrument from its packing case and remove any shipping ties, clamps, or packing materials. Carefully follow any instructions given on any attached tags. Inspect the instrument for scratches, dents, damage to case corner 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.
6 PRE-OPERATIONAL CHECK The CL526 portable calibrator is powered by four Ni-MH rechargeable batteries. The external battery charger, supplied as standard, may be ordered for either 110/120 Vac or 220/240 Vac power source. To modify the charger’s power voltage follow the instructions in par. 8.2. Before using the instrument carefully verify the nominal voltage value of the charger; in case of modification do not forget to correct the pertinent label.
7 ELECTRICAL CONNECTIONS Appropriate extension wires should be used between the thermocouple (or instrument under calibration) and the CL526 unless the thermocouple leads permit direct connection. Make sure that both thermocouple and compensating cable are connected with the correct polarity.
Examples of input /output wiring and connections MEASURE CH1 SIMULATION CH1 Thermocouples, mV Thermocouples, mV mA Active loop + mA Active loop +PS - - +IN + -IN - +PS - -IN RTD RTD mA Passive Loop mA Passive Loop + +PS + - +IN - - +PS - +IN -IN -IN RTD RTD Rtd (2 wire) Rtd (2 wire) +PS +PS - +IN - +IN -IN -IN RTD RTD Rtd ( 3 wire) Rtd ( 3 wire) +PS +PS - +IN - +IN -IN -IN RTD RTD Rtd (4 wire) Rtd (4 wire) NOT CONNECTED +PS +PS - 7.
The table below summarizes the error limits for Premium and Standard grades, while Extension grade wire is characterized by limits of error exceeding those in the table. Errors up to ±4°C may be experienced when using Extension grade thermocouple wire for J and K thermocouples.
8 POWER SUPPLY 8.1 Rechargeable batteries The CL526 portable calibrator is powered by four built-in rechargeable batteries. The instrument is shipped with an average level of charge. After unpacking, a full charge of the batteries is recommended; connect the instrument to the charger module (“OFF” condition) for a period of 10 hours minimum. The Ni-MH rechargeable batteries do not suffer when used in cyclic operations.
9 OPERATION & APPLICATIONS 9.1 ATTENTION: Power ON ALL VALUES IN THE FOLLOWING FIGURES ARE ONLY LISTED AS AN EXAMPLE. During set-up and load memory remember that the instructions of the manual related to key operation have the following meaning: + Press the key and keeping the pressure on the key, press then the key. , Press in sequence, first the key and then the key. • To power the instrument press the key; the indication : ... CL526...
9.3.1 IN - OUT mode selection • Press the key to power the instrument. • After diagnostic routine, the calibrator will be forced into the “IN” function with the active parameter previously selected (i.e. with the indication of a measured value of +1032 °C with thermocouple type “K”). In 1032.2°C TcK: • Open input terminals will cause a fluctuation of the reading up to “Underflow “ or “Overflow“ conditions.
9.3.3 • Tecnical unit To change the technical unit from °C to °F (or viceversa) follow the procedure indicated below: Instrument operative in -Out- mode as follows: Out 0.0°C TcK: • Switch the instrument -OFF- • Keep pressed the
• To “convert” the type of indication, with the instrument operative in any of the above indicated modes, press + keys obtaining for example the following indications: Out • • Press + keys to obtain the equivalent mV indication: Cvt 3.185 In 100.0 °C Pt Press + keys to obtain: Cvt • 100.0 °C TcK 138.0 To return in technical unit indication press the key. 9.3.
To select the required group follow the procedure indicated below: • Press the
• Press the <2> key to confirm the selection and to return to the menu page • Press the key to obtain one of the following indications: Sel : Program • Select with <▲> and <▼> keys the required "Sel:program" page • Press the key to confirm the selection and to return to the menu page • Press the
End Z step Start Time Soak Time Soak • To memory load the cycle parameters, follow the procedure indicated below • Select the required tecnical unit or electrical parameters • Select the required decimal point position • Press +
• Press + keys to memory store the new value • Press the key to obtain one of the following indications: Mode 1 ^ ramp Mode 1 ^ ramp Mode 1 1 ramp Mode + 1 ramp • Press the <▲> or <▼> key to select the required program type. • Press + keys to memory store the new selection. • Press the or <" "> key to exit the set-up procedure. 9.3.10.2 single cycle program repeated cycling program single cycle program repeated rise ramp program.
RJ : 0.0°C ext is displayed, it means that an external reference junction compensation has been selected for a temperature of 0.0°C (programmable from -50°C to +100°C). The reference junction compensation mode can be reprogrammed as indicated in par. 8.5.6. The external reference junction compensation value can be programmed as indicated in par. 8.5.13.2. 9.3.12 Scale factor program The “scale factor” mode is a method to read or to simulate electrical signals values in terms of engineering units.
• Press the <▲ ▲> or <▼ ▼> key to select the required page. • Press the key to memory load the selection. • The program will advance to the next step with the indication : WORD: ! WORD: mbar or from a previous set-up eg. This procedure allows the setting of four alphanumeric characters as a symbol of the measured or simulated parameter. Library of characters .. .... ..
• Press the key to memory load the selection • The display will indicate the scaled input/output value. Out 9.3.13 105.8 mbar Installation parameter procedure • To enter this procedure press the + keys • The display will indicate as shown below (the indicated numerical value is only an example). CAL? • 65388 N=0 To exit from the procedure, in any of the following steps switch the instrument -Off-. 9.3.13.
10 DIGITAL INTERFACE The CL526 portable calibrator is equipped with a digital interface. The interface circuit is essentially based on the serial communication interface subsystem (SCI) on the chip of the microprocessor. The output voltage levels are TTL at 0 to +5 V. An optional adaptor to convert the voltage level from 0 to +5V to RS232 levels can be supplied on request. This adaptor is required to interface the CL526 with a Personal Computer. 10.
6 5 4 8 3 7 Front view LINDY brown red green gray purple blue orange yellow pin 1 : pin 2 : pin 3 : pin 4 : pin 5 : pin 6 : pin 7 : pin 8 : 10.3 1 2 CINCH black green blue gray yellow white red brown TTL to RS 232 adapter The cat. BB530001 TTL to RS232 adaptor consists of a cable to which are connected a male mini DIN connector (for the CL526) and a DB 25 connector, that contains the electrical circuitry (for the PC).
Tx char Rx DATA 3 _ ß Rx char Tx DATA 3 Tx char Rx DATA 4 _ ß Rx char Tx DATA 4 Tx char Rx CHKSUM _ ß Rx char Tx CHKSUM IDNAME, Instruction, DATA 1, DATA 2, DATA 3, DATA 4 and CHKSUM are 8-bit values (1 byte) Notes Instruct DATA 1 Actual value 24 STO 0 Group A STO 0 Group A STO 1 Group A STO 1 Group A STO 2 Group A STO 2 Group A DATA 2 DATA 3 DATA 4 display(actual) lin(actual) Val Hi(actual) Val Lo(actual) 164 165 165 166 166 167 x Value Hi (0) x Value Hi (1) x Value Hi (2) x Value Lo
STO 2 Group H 194 STO 2 Group H 195 x Value Hi (2) x Value Lo (2) Display (2) x Lin (2) x STO 0 Group I STO 0 Group I STO 1 Group I STO 1 Group I STO 2 Group I STO 2 Group I 196 197 197 198 198 199 x Value Hi (0) x Value Hi (1) x Value Hi (2) x Value Lo (0) x Value Lo (1) x Value Lo (2) Display (0) x Display (1) x Display (2) x Lin (0) x Lin (1) x Lin (2) x STO 0 Group J STO 0 Group J STO 1 Group J STO 1 Group J STO 2 Group J STO 2 Group J 200 201 201 202 202 203 x Value Hi (0) x Value Hi (1) x
STO 2 Group R 234 STO 2 Group R 235 x Value Hi (2) x Value Lo (2) Display (2) x Lin (2) x STO 0 Group S STO 0 Group S STO 1 Group S STO 1 Group S STO 2 Group S STO 2 Group S 236 237 237 238 238 239 x Value Hi (0) x Value Hi (1) x Value Hi (2) x Value Lo (0) x Value Lo (1) x Value Lo (2) Display (0) x Display (1) x Display (2) x Lin (0) x Lin (1) x Lin (2) x STO 0 Group T STO 0 Group T STO 1 Group T STO 1 Group T STO 2 Group T STO 2 Group T 240 241 241 242 242 243 x Value Hi (0) x Value Hi (1) x
18 19 20 21 22 23 24 25 = = = = = = = = Ni120 OHM 22 mV 100 mV 1000 mV 10 V 20 mA X scaling Lin (name).AND.80hex = 0 80hex = value OK = error if line (name).AND.80hex = 80hex corresponding "Value Lo" 0 1 2 3 4 6 = = = = = = under over error 7 error 2 error 6 error 0 if line (name).AND.80hex = 0 value (name) = 2nd complement (16 bit) Value Hi (name).
Tx DATA 3 Rx char _ ß Rx DATA 3 Tx char Tx DATA 4 Rx char _ ß Rx DATA 4 Tx char Tx CHKSUM Rx char _ ß Rx CHKSUM Tx char The CL526 receives and verifies CHKSUM; when not valid, it does not accept the transmitted data Each PC instruction for operative mode request must be followed by the CHECSUM recalculation Instruction 47 (with the pertinent A and B values) as per the table below Notes Set In Set display Set value Start ramp Start ramp Instr 25 26 27 28 33 DATA 1 Lin (actual) Display (actual) Val
Dis/Lin STO 2 #D 127 Value STO 2 #D 127 0 0 202 204 Display (2) Lin Value Hi (2) Value Lo (2) 0 0 192 192 Dis/Lin STO 0 #E Value STO 0 #E Dis/Lin STO 1 #E Value STO 1 #E Dis/Lin STO 2 #E Value STO 2 #E 127 127 127 127 127 127 0 0 0 0 0 0 210 212 214 216 218 220 Display (0) Value Hi (0) Dispaly (1) Value Hi (1) Display (2) Value Hi (2) Lin Value Lo (0) Lin Value Lo (1) Lin Value Lo (2) 0 0 0 0 0 0 208 208 208 208 208 208 Dis/Lin STO 0 #F Value STO 0 #F Dis/Lin STO 1 #F Value STO 1 #F Dis/Lin ST
Dis/Lin STO 2 #N 127 Value STO 2 #N 127 1 1 106 108 Display (2) Lin Value Hi (2) Value Lo (2) 1 1 96 96 Dis/Lin STO 0 #O Value STO 0 #O Dis/Lin STO 1 #O Value STO 1 #O Dis/Lin STO 2 #O Value STO 2 #O 127 127 127 127 127 127 1 1 1 1 1 1 114 116 118 120 122 124 Display (0) Value Hi (0) Dispaly (1) Value Hi (1) Display (2) Value Hi (2) Lin Value Lo (0) Lin Value Lo (1) Lin Value Lo (2) 1 1 1 1 1 1 112 112 112 112 112 112 Dis/Lin STO 0 #P Value STO 0 #P Dis/Lin STO 1 #P Value STO 1 #P Dis/Lin STO
10.6 Communication programs In this paragraph are illustrated two examples of communication programs between the CL526 and an IBM or IBM compatible PC. Example A: (data transfer from CL526 to PC) Set IDNAME=1 and BAUD RATE=9600 on CL526 (see chapter 8.6). Connect CL526 through adapter BB530001 (TTLRS232 converter), to personal computer communication port COM1. Set CL526 in mA measurement (IN). Run the program and you will see on the computer screen the actual reading value (once).
16Ø IDNAME = ASC (INPUT$ (1 , 1)): REM READ RECEIVED IDNAME FROM CL526 17Ø PRINT #1, CHR$ (INSTRUCTION) ; 18Ø WHILE LOC (1) = Ø : WEND 19Ø INSTRUCTION = ASC (INPUT$ (1 , 1)) 2ØØ PRINT #1, CHR$ (DATA1) ; 21Ø WHILE LOC (1) = Ø : WEND 22Ø CHAR = ASC (INPUT$ (1 , 1)) 23Ø PRINT #1, CHR$ (DATA2) ; 24Ø WHILE LOC (1) = Ø : WEND 25Ø CHAR = ASC (INPUT$ (1 , 1)) 26Ø PRINT #1, CHR$ (DATA3) ; 27Ø WHILE LOC (1) = Ø : WEND 28Ø CHAR = ASC (INPUT$ (1 , 1)) 29Ø PRINT #1, CHR$ (DATA4) ; 3ØØ WHILE LOC (1) = Ø : WEND 31Ø CHAR =
11 MAINTENANCE The CL526 portable calibrator has been factory tested and calibrated before shipment. The calibration should be verified and re-adjusted if the instrument is showing an error exceeding the declared specifications or when a critical active or passive component is replaced (either at component level or at board level). OMEGA will supply, on request, a technical reference manual, with all instructions and recommendations for service and calibration.
ERROR 6 ERROR 7 When in mV or Tc “OUT” function the current flow must not exceed 0.5 mA. Indicates a possible error during scale factor computation. The above indicated faulty conditions can be announced both during the autodiagnostic routine or in measure or simulation modes. If the faulty condition is critical for the type of application, it is recommended to re-run the pertinent set up procedure. 11.
INDEX A K Automatic simulation cycle; 29 Average measurements; 10 Average readings; 27 Keyboard; 10; 13 M MAINTENANCE; 46 Manual step advance; 29 Microprocessor; 15 B Battery Charger; 23 Battery charger.
WARRANTY/DISCLAIMER OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanship for a period of 13 months from date of purchase. OMEGA Warranty adds an additional one (1) month grace period to the normal one (1) year product warranty to cover handling and shipping time. This ensures that OMEGA’s customers receive maximum coverage on each product. If the unit should malfunction, it must be returned to the factory for evaluation.
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 & Strain Gauges Load Cells & Pressure Gauges Displacement Transducers Instrumentation & Accessories ! ! ! ! FLOW/LEVEL Rotameters, Gas Mass Flowmeters & Flo
