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TABLE OF CONTENTS
1 PERFORMANCE.................................................................................................................................. 6
1.2 Specifications ................................................................................................................................................... 7
1.3 Table of ranges and accuracy .......................................................................................................................... 8
2 GENERAL FEATURES........................................................................................................................ 9
2.1 Innovative design ............................................................................................................................................. 9
2.2 Flexibility .......................................................................................................................................................... 9
2.3 Keyboard - Display........................................................................................................................................... 9
2.4 Digital interface ................................................................................................................................................ 9
2.5 Firmware .......................................................................................................................................................... 9
2.6 Scale factor - Square root ................................................................................................................................ 9
2.7 Cold Junction compensation .......................................................................................................................... 10
2.8 Calculated readings ....................................................................................................................................... 10
2.9 Transmitter simulation and calibration............................................................................................................ 10
2.10 Frequency - Counts........................................................................................................................................ 10
2.11 Programmable signal converter ..................................................................................................................... 10
2.12 Resistance thermometer ................................................................................................................................ 10
2.13 Remote temperature probe ............................................................................................................................ 10
2.14 Graphic mode................................................................................................................................................. 10
2.15 Simulation programs ...................................................................................................................................... 10
2.16 Power supply.................................................................................................................................................. 11
2.17 Report of Calibration ...................................................................................................................................... 11
2.18 CL520-CPS Software - Documents calibration data ...................................................................................... 11
2.19 CL520-LGM Software for data acquisition ..................................................................................................... 11
2.20 CL520-SLS Software for special linearizations .............................................................................................. 11
3 PHYSICAL DESCRIPTION................................................................................................................ 12
4 FUNCTIONAL DESCRIPTION........................................................................................................... 13
4.1 Power supply.................................................................................................................................................. 13
4.2 Keyboard........................................................................................................................................................ 14
4.3 Input circuit..................................................................................................................................................... 14
4.4 Microcontroller................................................................................................................................................ 15
4.5 Firmware ........................................................................................................................................................ 15
4.6 Display ........................................................................................................................................................... 15
4.7 Digital to analog converter ............................................................................................................................. 16
4.8 External battery charger or mains line operation............................................................................................ 16
4.9 Digital interface .............................................................................................................................................. 17
4.10 Resistance and RTD measurements ............................................................................................................. 17
4.11 Resistance and RTD simulation ..................................................................................................................... 17
4.12 Thermocouples input/output circuit ................................................................................................................ 17
5 PRE-OPERATIONAL CHECK ........................................................................................................... 19
5.1 Unpacking ...................................................................................................................................................... 19
5.2 Case............................................................................................................................................................... 19
5.2.1 Portable cases........................................................................................................................................... 19
5.2.2 Panel mounting ......................................................................................................................................... 19
5.2.3 Table top use............................................................................................................................................. 19
6 POWER SUPPLY............................................................................................................................... 20
6.1 Power supply.................................................................................................................................................. 20
6.1.1 Rechargeable battery ................................................................................................................................ 20
6.1.2 Charging the battery.................................................................................................................................. 20
6.1.3 How to maximize the life span of the battery............................................................................................. 20
7 ELECTRICAL CONNECTIONS ......................................................................................................... 21
7.1 Wiring practice ............................................................................................................................................... 21
7.2 Thermocouple wires....................................................................................................................................... 22
7.3 Remote connections ...................................................................................................................................... 22
7.3.1 External contact......................................................................................................................................... 22
7.3.2 Remote Rj ................................................................................................................................................. 23
8 OPERATION & APPLICATIONS....................................................................................................... 24
8.1 Power ON ...................................................................................................................................................... 24
8.2 Configuration Reset ....................................................................................................................................... 25
8.3 Next Calibration date...................................................................................................................................... 25
8.4 Display adjustments ....................................................................................................................................... 25
8.4.1 Display backlight ....................................................................................................................................... 25
8.4.2 Autolamp mode ......................................................................................................................................... 26