Fluke 943-27 manual Victoreen Communications Loop 943-227-15VL, RS232C Communications

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Theory of Operation

Communications 2

Victoreen Communications Loop – 943-227-15VL

Communication between the detector preamplifier and the UDR or 960 controller may be performed via Victoreen loop, a serial asynchronous communications interface. The communication utilizes Victoreen protocol and is intended for use in electrically hostile environments where high noise immunity is required. Noise immunity is achieved using differential line driving, and electrically isolating the end of each transmit/receive pair with opto-isolators. Using a ±15 Vdc communications power supply, each 0 to 1 transition is equivalent to a 30-volt swing in loop voltage. Refer to the Model 942-200-80-1 Communications Board instruction manual for further information.

Jumper JP1 controls the communication communications method employed. JP1, A-B selects Victoreen loop communications.

RS232C Communications – 943-227-15

Communication between the detector preamplifier and the UDR or 960 controller may be performed via RS232C serial asynchronous communications interface. Jumper JP1 controls the communication communications method employed.

JP1, B-C selects RS232C communications.

2.5 Preamplifier Switch & Jumper Settings

Switch and jumper settings for the preamplifier are summarized in Table 2-7, 2-8, and 2-9.

Table 2-7. Preamplifier Serial Interface Board 977-210-10M Switch Settings

Switch

Normal

Switch Function

 

Op.

 

SW1

Open

Microprocessor Reset switch, momentary contact

 

 

 

SW2

N/A

Not supplied

 

 

 

SW3-1

ON

OFF Selects 300 baud • 1/ON Selects 4800 baud (normal setting)

SW3-2

OFF

OFF • (No function is implemented in the 977-210-10M)

SW3-3

OFF

OFF Selects Rate Mode (normal) • (Selects Maintenance Mode for

 

 

factory PGA and Auto Zero set-up only)

SW3-4

OFF

OFF • (No function is implemented in the 977-210-10M)

NOTE

SW3 is a 4-position DIP switch on the 977-210-10M serial interface board.

2-5

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Contents Victoreen Fluke Biomedical Table of Contents Blank Application General InformationGeneral Description Preamplifier Variations Application Detector Readout SpecificationsFeature Specification Preamplifier Power OFF Selects 300 baud 1/ON Selects 4800 baud normal setting Switch Normal Switch FunctionJumper Normal Setting Function Alternate Setting Jumper Normal Setting Function Cal. Position943-227-15 Description Connects To 977-210-10M TB1J4-1 Detector ConnectionsRecommended Spare Parts Auxiliary EquipmentReceiving Inspection Part Number Description Used OnStorage Blank Functional Description Theory of OperationFunction Hex Address Bit Position Description Theory of Operation Main Circuit BoardsRS232 Transmit Test Point FunctionRS232C Communications Victoreen Communications Loop 943-227-15VLJumper Normal Function Cal Setting Position Jumper Normal Function Alternate SettingEnables Victoreen Loop Operation InstallationPreamplifier Mounting Electrical InterfaceSet-up Digital Preamplifier Power Failure Fail AlarmOperation Normal OperationTo B Enables Victoreen Loop To C Enables RS232C Normal Configuration FunctionsTo B Normal Operation To C PGA Offset Adjust Firmware VersionSoftware Calculations Set Point Error CodesBlank Maintenance Maintenance, Calibration and TroubleshootingElectronic Adjustments Electronic CalibrationTroubleshooting / Adjustments TroubleshootingConnector DESIGNATIONS, 943-227-15 and 943-227-15VL Connector DesignationsSwitch and Jumper POSITIONS, 943-227-15 and 943-227-15VL Related Manuals Not Supplied with this document Applicable Drawings 943-227-15VLBlank Part Number Description Bill of MaterialsBill of Materials- 943-227-15 and 943-227-15VL Blank Detector Cable Termination Cable Termination InstructionsCable Termination Instructions Digital Preamplifier HV Connector Notes HV Digital Preamplifier Cable Termination Instructions D Digital Preamplifier Appendix Cable Termination Instructions Digital Preamplifier Modification Sheets, Engineering Instructions Modification Sheets, Engineering InstructionsBlank Blank Fluke Biomedical

943-227-15, 943-27 specifications

The Fluke 943-27 and Fluke 943-227-15 are advanced electrical testing tools designed to meet the demands of professionals in industrial and commercial settings. Recognized for their accuracy and reliability, these devices come loaded with essential features tailored to ensure optimal performance during electrical measurements.

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In conclusion, the Fluke 943-27 and 943-227-15 represent essential tools for electrical technicians who require versatility, accuracy, and durability in their testing equipment. With advanced features, reliable technologies, and a user-centric design, these multimeters not only meet but exceed the expectations of professionals in the field.
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