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Table of Contents

Table of Contents2
General Information7
- Introduction7
- Description7
Thermometer/Controller7
- Major Assemblies Supplied9
- Ordering of Replacement O R a D D I T I O N a L Sensors9
- Introduction11
- Initial Inspection11
- Power Requirements11
- Grounding Requirements11
Installation11
- Repackaging for Shipment12
Sensor, Cable, and Monitor Connections13
Operating Instructions14
- Introduction14
- Controls, Indicators, Connectors14
- Temperature Readout18
- Standard DT-500-DRC and DT-500CU-DRC-36 Curves 119
- The 10-Sensor S E L E C T O R Switch 119
- Remote P a R a L L E L BCD Input/Output Option 120
Dt-500-Drc23
Table26
Table 3.627
BCD Temperature Output27
Remote27
Model DRC-Series27
Table28
D I N Standard Curve F O R Platinum S E N S O R S28
- IEEE I N T E R F a C E Option32
General IEEE S P E C I F I C a T I O N S and Operation32
Figure34
Drc-84C-Ieee34
Figure37
S P E C I F I C O P E R a T I O N of T H E DRC8-IEEE I N T E R F a C E38
Sample Programming38
- Option Board40
- I N S T a L L a T I O N of DRC IEEE Option Board41
- Rack Mounting T H E DRC-84C41
- Figure 3.441
- E R R O R C O N D I T I O N S42
Theory of Operation43
- Introduction43
- General Description43
DRC-84C F R O N T P a N E44
Figure44
DRC-84C Block Diagram44
- Detailed Description45
4.3.1 Power Supplies45
4.3.2 Precision Current Sources and Input Switching46
4.3.3 A/D Converter and Microprocessor Hardware46
4.3.4 Software47
- Figure49
- Analog Control and Set Point50
4.3.6 Digital Display Board51
Calibration and Troubleshooting53
- Introduction53
- Test Equipment53
- General Remarks53
- Instrument Calibration53
5.4.1 Current Sources53
5.4.2 A/D Converter54
5.4.3 D/A Converter54
Table54
Decimal-Hex T a B L E54
Table55
Output Buffer57
DRC L/A Option (if P R E S E N57
- Instrument Tests57
- Figure58
Table58
Replaceable Parts List61
- Main Board Components61
- DRC-84C BCD-L/A and IEEE Components L I S69

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