Campbell CR800 Specifikace stáhnout pdf (Strana 5)

CR800/CR850 Table of Contents

3. CR800 Measurement Details....................................3-1

3.1 Analog Voltage Measurement Sequence.............................................. 3-1

3.1.1 Voltage Range............................................................................. 3-1

3.1.2 Reversing Excitation or the Differential Input............................ 3-3

3.1.3 Measuring Single-Ended Offset.................................................. 3-3

3.1.4 SettlingTime................................................................................ 3-3

3.1.5 Integration................................................................................... 3-4

3.2 Single Ended and Differential Voltage Measurements......................... 3-4

3.3 Signal Settling Time ............................................................................. 3-6

3.3.1 Minimizing Settling Errors ......................................................... 3-6

3.3.2 Measuring the Necessary Settling Time...................................... 3-7

3.4 Thermocouple Measurements............................................................... 3-8

3.4.1 Error Analysis ............................................................................. 3-9

3.4.2 Use of External Reference Junction or Junction Box................ 3-16

3.5 Bridge Resistance Measurements ....................................................... 3-17

3.6 Measurements Requiring AC Excitation ............................................ 3-19

3.7 Pulse Count Measurements................................................................. 3-20

3.8 Self Calibration................................................................................... 3-21

4. CRBASIC - Native Language Programming ...........4-1

4.1 Format Introduction.............................................................................. 4-1

4.1.1 Mathematical Operations ............................................................ 4-1

4.1.2 Measurement and Output Processing Instructions...................... 4-1

4.1.3 Inserting Comments Into Program.............................................. 4-2

4.2 Programming Sequence........................................................................ 4-2

4.3 Example Program ................................................................................. 4-4

4.3.1 Data Tables ................................................................................. 4-4

4.3.2 The Scan -- Measurement Timing and Processing...................... 4-6

4.4 Variable Data Types ............................................................................. 4-7

4.4.1 FLOAT........................................................................................ 4-7

4.4.2 LONG ......................................................................................... 4-7

4.4.3 BOOLEAN ................................................................................. 4-7

4.4.4 STRING...................................................................................... 4-7

4.4.5 Numerical Expressions with Floats, Longs and Booleans .......... 4-8

4.5 Numerical Entries ................................................................................. 4-9

4.6 Logical Expression Evaluation ........................................................... 4-10

4.6.1 What is True?............................................................................ 4-10

4.6.2 Expression Evaluation............................................................... 4-10

4.6.3 Numeric Results of Expression Evaluation............................... 4-10

4.7 Flags.................................................................................................... 4-11

4.8 Parameter Types ................................................................................. 4-11

4.8.1 Expressions in Parameters......................................................... 4-12

4.8.2 Arrays of Multipliers Offsets for Sensor Calibration................ 4-12

4.9 Program Access to Data Tables.......................................................... 4-13

5. Program Declarations ..............................................5-1

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Campbell CR800 Specifikace Strana 5

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Campbell CR800 Specifikace Strana 5

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