Campbell Scientific CR9000X Measurement and Control System - Manual (Page 6)

CR9000X Table of Contents
1.3 Humidity Effects and Control ............................................................... 1-7
1.3.1 Desiccant ..................................................................................... 1-7
1.3.2 Nitrogen Purging......................................................................... 1-7
1.4 Recommended Grounding Practices ..................................................... 1-8
1.4.1 Protection from Lightning........................................................... 1-8
1.4.2 Operational Input Voltage Limits: Effect on Measurements....... 1-8
1.5 Use of Digital Control Ports for Switching Relays............................... 1-9
2. Data Storage and Retrieval ..................................... 2-1
2.1 Memory/Data Storage in CR9000X...................................................... 2-1
2.1.1 Internal Flash Memory ................................................................ 2-1
2.1.2 Internal Synchronous DRAM...................................................... 2-1
2.1.3 PCMCIA PC Card....................................................................... 2-1
2.2 Internal Data Format ............................................................................. 2-2
2.2.1 NAN and ±INF............................................................................ 2-3
2.3 Data Collection ..................................................................................... 2-5
2.3.1 The Collect Menu........................................................................ 2-5
2.3.2 Table Monitor Window Save to File........................................... 2-7
2.3.3 File Control Files Retrieval ......................................................... 2-7
2.3.4 Logger Files Retrieval Via PCMCIA PC Card ........................... 2-8
2.3.5 Converting File Format ................................................................ 2-9
2.4 Data Format on Computer................................................................... 2-10
2.4.1 Data File Header Information ................................................... 2-10
2.4.2 TOA5 ASCII File Format ......................................................... 2-13
2.4.3 TOB1 Binary File Format ......................................................... 2-14
2.4.4 TOB3 Binary File Format ......................................................... 2-14
3. CR9000X Measurement Details .............................. 3-1
3.1 Measurements using the CR9041 A/D.................................................. 3-1
3.1.1 Analog Voltage Measurement Sequence .................................... 3-1
3.1.2 Single Ended and Differential Voltage Measurements ............... 3-3
3.1.3 Signal Settling Time.................................................................... 3-8
3.1.4 Thermocouple Measurements ................................................... 3-10
3.1.5 Bridge Resistance Measurements.............................................. 3-18
3.1.6 Measurements Requiring AC Excitation................................... 3-20
3.1.7 Influence of Ground Loop on Measurements ........................... 3-20
3.2 CR9058E Isolation Module Measurements ........................................ 3-21
3.2.1 CR9058E Supported Instructions.............................................. 3-22
3.2.2 CR9058E Sampling, Noise and Filtering .................................. 3-24
3.2.3 CR9058E; Hard Setting the Filter Order................................... 3-27
3.3 CR9052 Filter Module Measurements ................................................ 3-30
3.4 Pulse Count Measurements................................................................. 3-35
3.4.1 CR9070 PulseCount Resolution................................................ 3-35
3.4.2 CR9071E PulseCount Resolution ............................................. 3-37
3.4.3 CR9071E TimerIO for Measuring Frequency Inputs................ 3-38
3.4.4 High Frequency Pulse Measurements ....................................... 3-38
4. CRBasic – Native Language Programming ........... 4-1
4.1 Introduction to Writing CR9000X Programs........................................ 4-1
4.1.1 ShortCut ...................................................................................... 4-1
4.1.2 Program Generator ...................................................................... 4-1
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