Emerson MSM400 manual Sensor Cables, Control Unit

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4.4SENSOR CABLES

The ultrasonic drive signals on the sensor cables are normally at 1MHz and 3.3MHz. The cables are a special construction of two separately screened twisted pairs, designed to meet electromagnetic compatibility regulations. The cables can be extended up to 100 metres, but should use the same cable type, available from Mobrey Measurement. (or consult factory for alternative vendors). The certification for intrinsically safe systems requires that cable joins should be in enclosures rated at least IP20 and suitable for the intended enviornment and that the wiring should withstand a test voltage of 500V rms to earth. The electrical parameters of the cable used must conform to Table 1 in section 2.4.

Twisting the cables on installation should be avoided. Cable runs should be separated from any high voltage or mains cables, to avoid crosstalk or switching transients.

4.5CONTROL UNIT

The control unit housing is rated IP65. It is suitable for mounting outside, but this should be above any flood level, away from any overflow water path, and away from direct sunlight. Internal sensors turn the LCD backlight off if the temperature is excessive.

The control unit must not be mounted in areas where an explosion hazard exists.

It is not necessary or advisable to remove the lid to the upper part of the box, containing the LCD and keypad.There are no user serviceable parts inside. The control unit must not be modifed in any way. The keypad and LCD are linked to the lower electronic pcb by a ribbon cable at the left hand side of the upper housing. Mounting brackets for wall mounting are provided, and these should be attached to the rear of the housing using the self tapping screws (also provided).The brackets are then used to wall mount the MSM400, using the six mounting holes available. Dimensional information is shown below:

		203.5
		Internal wall mounting holes
	224.2	33.35
	224.2	80
		.0
	236.7
	236.7
	104.2
	104.2	100.
		0
	12.5
	6 off 5.0	226.5
	mounting holes Ø	226.5
		241.5
		256.5

Figure 8 : MSM 400 Control Unit Dimensions

Note that the weight of the MSM400 is 2Kg. To conform with safety requirements the wall should be capable of

supporting 4 x this weight, ie. 8Kg. 5mm diameter steel screws should be used.

IP258

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Contents Mobrey Contents Safety Precautions Sensor Connection IVE Neutral Earth Mains DisplayENT Product Introduction MSM400 Slurry Monitoring System Product DescriptionSlurry Characteristics Ultrasonic Attenuation versus Suspended solidsSuspended Sensor Type MSM433 Mobrey Pipe Section SensorsSensor Type Numbering System Control Unit MSM400 Displays and KeypadKeypad Operation SPECIFICATIONS--MSM400 HartEMC Pipe Section Installation Suspended Sensor InstallationPreliminary Checks Sensor Cables Control UnitTerminal Label Function Hart Connections and Jumper Settings Sensor ConnectionsRelays Current OutputSafety Precautions Initial Power UPMains Supply Main Menu Toggle RUN Calibration Setup Toggle RUN Calibration Setup MonitorToggle RUN Diagnostic Parameters EX-FACTORY System FeaturesZero Setting Initial Zero Calibration Methods Auto CAL Auto CAL Zero Setting Procedure Rechecking ZeroAutocal Span Setting Procedure Clear Liquor Press ENT To set 23.1dB 26.2dBSample Press ENT to set 33.6dB 44.2dB Auto CAL LAB ValuesZero Setting Procedure Maximum % SolidsSpan CALIBRATION/GRADIENT Methods Calibration Method 1-SLURRY TypeAttenuation VALUE-METHOD Duty Mode Desludge Mode No. of operation Set Default value Max value Hrs & minsStart on Stop on Stop if Do not start if INPUT↓ Output Start Time #1 hm 730 P254 Outputs Current Output Relay OperationAlarm Middle Display←−−−−−−− Lower Display Display option parameter number DescriptionSettings Engineering Frequency SETSystem Test Current Output Hart Smart Communications SensorsAppendix A1 Main Menu SUB Menu Parameter DescriptionPar No Alarm Report DiagnosticsLogging EngineeringMin Max Default Value Parameter DescriptionParameter Description Min Max Default Value MSM400 MonitFrom list 3.6/21mA/hold last reading Min Max Default Value Ex-Factory Manufacturer’s Code Appendix A3 Hart and Psion Operating Instructions Hart ConsiderationsCalibration adjustments at operating conditions Smart Communication with the Mobrey MSM400Further customisation using the Smart HHC Hand Held Communicator Assembly Instructions Handheld Communicator Mobrey CKFig DII. Loop diagram Fig D1 MOBREY-CK* HHC assembly How to connect the Smart Communicator Hand Held Communicator Operation Mobrey Find Save Diary Calc Time Notes World Alarm How to drive a Psion based Smart CommunicatorTAG Tank Help D7.0 Introduction and Function menuD7.1 Monitor/Display Parameters D D7.2 Program Parameters PDefault Register Mode KEYWorking Register Safe RegisterHand Held Communicator Registers Select Data Source 10.0ERROR Messages on the HHC 10.1Alarm and Error MessagesPrintout or PC transfer of MSM400 programme data Display of Parameter Data10.2Invalid Data Entry Password not Open Instrument in Multidrop Mode10.3Communication Errors Invalid Action not the Same InstrumentD0 D8 Current Output ** Set current Trim-maximum Trim-maximum 11.0Current Loop Checks and TrimmingCurrent and USE ↑ & ↓ To Trim the Output 12.0Unknown InstrumentD13.0 Smart Interfaces Compatibility D13.1 Introduction 13.3Use of multiple Smart CommunicatorsAbcdef