Fluke 875 manual Cable and Wiring Installation, Detector Cable Inside Containment

Page 17

Installation

Installation 2

done until cable is pulled and tested. (Refer to the procedure Cable-877, in Appendix B, for more information.)

NOTE

Minimum bend radius of the 878-1-9 cable is four inches. When bending conduit or flex hose, take this into consideration. Typical bend radius for P/N 878-12-30 is ¾ inch; stainless steel flex house is 12 inches.

2.2 Cable and Wiring Installation

Detector Cable Inside Containment

Detector cables used inside containment are to be installed and terminated according to procedure Cable-877, in Appendix B. Do not allow any moisture or contaminants to deposit on the connectors used for installing cables due to the potential for electrical leakage. Because the detector transmits extremely small current signals, no terminal block connections are acceptable in the penetration. Signal conductor must be shielded but not grounded (qualified butt splices are acceptable). Refer to drawing GEL875-1 for electrical connections and to 878-1-9 for cable data.

CAUTION

The detector and readout must not be connected during the following test.

Detector Test After Installation

Testing of detector cables after installation is required. A leakage test from the center conductor to the shield should yield better than 1000 megohms at 1000 VDC.

Typical resistance of the center conductor is 0.022 ohm per foot at 20°C (68°F).

Detector Cable Outside Containment

Detector cables used outside containment should be a qualified coaxial type RG 59/U. Ideally, the cable should connect directly from the penetration to the appropriate connectors on Readout Module 876A-1. Terminal block connections and unshielded center conductors are not acceptable for installation. Fluke Biomedical recommends that cable 50-103 be used. Typical wiring is shown on drawing GEL 875-1. After installation, testing is required as described in the previous paragraph. Specifications for cable used outside containment are listed below. Refer to drawing 50-103 for additional data.

Specifications for Cable 50-103

Type

RG 59/U, alternate

Conductor

19/36 Tinned copper

Insulation

Cross-linked polyethylene

Flame Tape

Mica tape

Shield

#36 AWG, 92% coverage

Insulation Wrap

0.001 inch (0.03 mm) mylar

Jacket Type

Bostrad 7 (CSPE)

2-3

Page 16 Page 18
Image 17
Page 16 Page 18
Contents High Range Containment Monitor VictoreenFluke Biomedical Table of Contents Calibration and Test Procedures Introduction SpecificationsGeneral Description Containment MonitorReadout Module 876A-1 Temperature Operating 40 to 120F 4 to 49CRack Chassis Equipment OverviewHigh-Range Containment Monitor Detector Cables/Connectors/Panel Pull Box AssemblyFlexible Tubing 878-12-30TAB Optional EquipmentHigh-Range Containment Monitor Typical Energy Response Curve Detector Typical Linearity Detector Receiving Inspection High-Range Detector, Recommended InstallationStorage Procedures, Warnings, and CautionsBlank Installation InstallationReadout Module Pull BoxCable Sealing Specifications for CableDetector Test After Installation Cable and Wiring InstallationSpecifications for Cable Detector Cable Inside ContainmentAll Alarms on P2 Normal Operation Shelf State Ancillary WiringPower Connections P1 Computer & RecorderOperation OperationVictoreen Readout Module 876A-1 Function DescriptionFunctional Description Negative Power Supply Operation of High Voltage Supply During ECS Test High Voltage Power Supply Normal Operation non-ECS TestFAIL/SAFE Comparison Circuit on Power Supply Board Alert Alarm Circuit High Alarm CircuitPen Clamp Fail/Safe CircuitRecorders and Computer Buffers Meter at extreme lower end of scale Panel Meter Action During ECS TestMonitoring Circuits of The ECS Board Action of Green Safe/Reset Light and Alarm During ECS TestLow Voltage Ramp Generator Block Diagram of ECS Test Muting Circuits of ECS Board Safe/Reset Sub-circuitsBlank Calibration Maintenance, Calibration, and TroubleshootingMaintenance Test Procedure TP876A-1-108 Troubleshooting Mother Board P/N 876-1-78, Schematic 876-1-3A Signal Input CircuitPreamplifierIMeter Board P/N 876A-1-86, Schematic 876A-1-3E Rear PanelTest Point Normal Channel Test TP501 TP502 +6.3Normal Low Signal Level Channel Test High Alarm CircuitMuting Stages of the Alarm Circuits ESC Board P/N 876A-1-92, Schematic 876A-1-3D Wave Shapes on the Electronic Check Source Board Starting With Terminal H on Relay Driver Board Starting With Pins M and P on the Power Supply SchematicOverall Fail Circuitry Associated with the ECS Test Operation of the Latch Circuit Outputs of U206 Pulse Generator on the ECS BoardCircuit assumed initially in Pass Condition Fail Condition Latch CircuitPin Voltage State Comments NORCalibration and Test Procedures Blank Cable and Pull Box Procedures Cable and Pull Box ProceduresVictoreen Document Number Description Applicable Drawings and Bill of MaterialsApplicable Drawings Detector Cable Out of Containment Applicable Bill of Materials Fluke Biomedical
Top Page Image Contents