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Calibration and Troubleshooting
M370078-01 6-3
6
Main Voltage and Current Calibration Principle
Understanding the Problem
Figure 6-1 illustrates two sources of analog programming error: gain error
and offset error. Gain error is the departure from the ideal slope of the
measured versus programmed line. Offset error is the magnitude of the
measured value when the programmed value is zero.
For best results, the next recommended action is gain calibration for 90%
of maximum value and offset calibration for 10% of maximum value.
Perform gain calibration again.
Figure 6-1
Offset (Intercept) Error and Gain (Slope) Error
Programmed Value
Idea
l
R
e
a
l
Offset Error
Gain Error
- XG 850 Watt Series 1
- Programmable DC 1
- Power Supply 1
- Programmable DC Power 3
- About This Manual 7
- Related Information 8
- Acronyms 8
- Font Conventions 8
- Important Safety Instructions 9
- Standard Warnings 10
- Contents 11
- Local Operation 12
- - - - - - - - - - -6–4 15
- SCPI Command Reference 16
- Error Messages 16
- Specifications 17
- M370046-01 xvii 19
- M370046-01 xviii 20
- M370046-01 xix 21
- Features and Options 24
- XG 850 Watt Models 25
- Front Panel 26
- Figure 1-2 27
- Rear Panel Connectors 28
- Installation 31
- Basic Setup Procedure 32
- Initial Inspection 33
- Periodic Cleaning 33
- Step 2: Location and Mounting 34
- AC Input Connector 35
- Step 4: Selecting Load Wires 36
- Noise and Impedance Effects 37
- 2-8 M370078-01 38
- M370078-01 2-9 39
- Step 6: Connecting Loads 40
- Inductive Loads and Batteries 41
- Connecting Single Loads 42
- Connecting Multiple Loads 42
- CAUTION: Reverse polarity 44
- Table 3-1 48
- Navigating the Menu System 49
- 3-6 M370078-01 50
- Figure 3-3 52
- Front Panel Menu System 52
- Table 3-2 53
- Front Panel Display Text 53
- Standard Operation 55
- Automatic Mode Crossover 56
- Enabling the Output 59
- Enabling the Auxiliary Output 60
- Auxiliary Auto Start Mode 61
- Alarms and Errors 62
- Clearing Alarms 63
- Front Panel ALARM LED 64
- Alarm Masking 65
- Alarm Output Latching 66
- Setting Foldback Mode 67
- M370078-01 3-25 69
- Defining the OVP Set Point 70
- Defining the UVP Set Point 72
- Defining the OTP Mode 73
- Resetting in Latch Mode 73
- 3-30 M370078-01 74
- Interlock Function 76
- Hardware Malfunction Alarms 77
- User Setting Memory Locations 79
- 3-36 M370078-01 80
- Local Lockout 81
- 3-38 M370078-01 82
- Resetting the Power Supply 83
- Using Multiple Power Supplies 85
- Figure 3-5 86
- Split Supply Operation 86
- Setting up the Master Unit 89
- Setting up the Slave Units 89
- Setting Foldback Protection 90
- M370078-01 3-47 91
- Figure 3-9 92
- Programming (APG) 93
- Programming (ISOL) 93
- Remote Programming Options 95
- Auxiliary Outputs 96
- Table 4-3 98
- APG Pins and Functions J1 98
- WARNING: Shock hazard 100
- Analog Programming Mode 101
- Activating APG Voltage Mode 102
- Deactivating APG Voltage Mode 102
- Remote operation 103
- Quick Tip 103
- Activating APG Current Mode 104
- Deactivating APG Current Mode 104
- Figure 4-6 106
- Figure 4-7 106
- Voltage and Current Readback 111
- 4-20 M370078-01 112
- Table 4-4 113
- CAUTION: Equipment damage 114
- 4-24 M370078-01 116
- 4-26 M370078-01 118
- 4-28 M370078-01 120
- M370078-01 4-29 121
- M370078-01 4-31 123
- 4-34 M370078-01 126
- Remote Operation 127
- Introduction 128
- Hardware and Connection Setup 129
- DB-9 Pinout 131
- RJ-45 plug 132
- DB-25 connector on PC 132
- DB-9 connector on PC 133
- Completing the Setup 134
- M370078-01 5-9 135
- 5-10 M370078-01 136
- Verifying Installation 137
- 5-12 M370078-01 138
- M370078-01 5-13 139
- Complete the Setup 140
- M370078-01 5-15 141
- Multiple Power Supply Setup 142
- Terminal Configuration 143
- 5-18 M370078-01 144
- M370078-01 5-19 145
- Data Rate Setting (Kbps) 146
- Multichannel Address Setting 147
- Remote Interface Addressing 148
- For example: 150
- Status Reporting in SCPI 151
- Figure 5-16 152
- SCPI Status Reporting Model 152
- M370078-01 5-27 153
- Status Byte 154
- Message Available (MAV) 155
- Master Summary Status (MSS) 155
- Request Service (RQS) 155
- Query the Status Byte 156
- M370078-01 5-31 157
- Figure 5-18 158
- Table 5-10 158
- Operation Complete 159
- Wait-to-Continue Command 159
- 5-34 M370078-01 160
- OPERation Status Register 161
- Table 5-12 163
- Table 5-13 163
- Current SHare Sub-Register 164
- M370078-01 5-39 165
- Query Current Share Event 166
- Query Current Share Condition 166
- Query Shutdown Event 167
- Query Shutdown Condition 167
- Enable Shutdown Sub-Register 167
- Query Protection Event 168
- Query Protection Condition 168
- QUEStionable Status Register 169
- Figure 5-21 170
- Table 5-15 171
- VOLTage Sub-Register 172
- TEMPerature Sub-Register 172
- M370078-01 5-47 173
- 5-48 M370078-01 174
- M370078-01 5-49 175
- SCPI Error/Event Queue 176
- M370078-01 5-51 177
- Reset Command 178
- Clear All Status Registers 179
- SCPI Preset Status 180
- Command Line Help System 181
- 5-56 M370078-01 182
- M370078-01 5-57 183
- 5-58 M370078-01 184
- Example 3: 185
- Gets the response: 185
- Auto Sequence Programming 186
- Setting Dwell Time 187
- 5-62 M370078-01 188
- Important: 189
- 5-64 M370078-01 190
- 5-66 M370078-01 192
- Foldback Protection 193
- Over Temperature Protection 194
- Interlock Enable/Disable 194
- Save and Recall 195
- Set Analog Programming Level 195
- 5-70 M370078-01 196
- Calibration and 199
- Troubleshooting 199
- Programmed Value 201
- Gain Error 201
- Step 1: Gain Calibration 202
- Step 2: Offset Calibration 202
- Step 3: Recalibrate Gain 203
- Gain Calibration 204
- Offset Calibration 206
- Important:: 218
- M370078-01 6-21 219
- Restore Factory Calibration 224
- User Diagnostics 225
- Troubleshooting for Operators 226
- SCPI Command 227
- Reference 227
- SCPI Conformance Information 228
- SCPI Command Hierarchy 229
- Using SCPI Commands 230
- Using Minimum and Maximum 231
- Using Queries 231
- Terminating Characters 232
- Common Commands 232
- Parameter Types 233
- SPCI Command Tree 234
- M370078-01 A-9 235
- A-10 M370078-01 236
- M370078-01 A-11 237
- A-12 M370078-01 238
- M370078-01 A-13 239
- SCPI Command Summary 240
- Table A-1 241
- Table A-2 242
- Readback Commands 242
- Table A-3 243
- Table A-4 244
- [:]CALibration:INPut 245
- :ANALog[:VOLTage] 245
- :ANALog:CURRent 245
- Table A-7 248
- SCPI Commands for Power 248
- Table A-8 248
- SCPI Commands for Triggering 248
- Table A-9 249
- System Commands 249
- System Commands (Continued) 250
- Table A-10 252
- Status Commands 252
- Status Commands (Continued) 253
- Table A-11 260
- Protection Commands 260
- Table A-12 260
- Auto Sequence Commands 260
- Command Error List 265
- Execution Error List 266
- Device-Specific Error List 267
- Query Error List 268
- Table C-1 270
- M370078-01 C-5 273
- C-6 M370078-01 274
- Figure C-1 275
- Figure C-2 276
- Warranty 277
- Disclaimer 278
- Exclusions 279
- Return Procedure 280
- Out of Warranty Service 280
- Information About Your System 280
- , described 282
- Printed in USA 286
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