134, Output when switched from Reverse to

6F8A0917

(2) Forward and reverse directions (internal automatic switching), 2 ranges

Output (%)

		125
	Range 3	100		Range 1	20mA
				Range 2	20mA
		Range 4		Range 2
		Range 4
		Hysteresis
				Hysteresis
		0			4mA
					4mA
		Reverse direction	0	Forward direction	Flow rate
					Flow rate

Range output No. 1	OFF	ON		ON	OFF

Range output No. 2

OFF

Output when switched from Reverse to	Output when switched from Forward to Reverse
Forward direction	direction

	Output
Low cutoff
1.25
	Low
	cutoff
	0	4mA
	0
(Low cutoff	1.25)
Reverse direction	0 Forward	Flow rate
	direction

Range output	ON	OFF
No. 2	ON	OFF
No. 2

Output
	Low cutoff
	1.25
Low cutoff	4mA
	4mA
	0
	(Low cutoff	1.25)
Reverse 0	Forward	Flow rate
direction	direction

Range output	ON	OFF
No. 2	ON	OFF
No. 2

From reverse direction range to forward direction range

From forward direction range to reverse direction range

- 134 -

Page 135

Image 135

Toshiba L5232 manual 134, Output when switched from Reverse to, Forward direction Direction

Contents

6F8A0917 Electromagnetic Flowmeter Converter LF232 Type Nd Edition August First Edition June 6F8A0917 Explanation of signal words Safety symbolsColor explanation Safety Precautions for Installation and Wiring Safety Precautions Safety Precautions for Maintenance and Inspection Warranty and Limitation of LiabilityUsage limitation Do not store or install the flowmeter Handling Precautions Handling Precautions Table of Contents 6F8A0917 6F8A0917 Product Inspection and Storage Product InspectionStorage Overview Features Appearance Names of Parts Internal structure with converter cover opened Terminal block construction Hands Installation 6F8A0917 Unit inch mm How to Install the Converter Example of Pipe Mounting Do not conduct wiring work with bare hands WiringUrn off mains power before working on pipes From mains power Installation Cables Installation Cables External Connections 6F8A0917 Wiring Method Terminal Treatment of CablesExcitation cable Terminal Treatment of Flow Rate Signal Cable Connecting the input signal cable Cable Connection Power cable, current output cable and digital I/O cables Connection to Terminal Block Grounding 9a Wiring between Detector and Converter 10 Detector Grounding Method Difficult 11 Connection Example of Electromagnetic Counter Digital I/O Connections Installation WiringReplacing the LF230 Converter Combination with an Existing Detector for Large Meter Size 12 How to Connect an Adjusting Capacitor Replacement of partially filled pipes type 6F8A0917 Operation 6F8A0917 Display and Controls Display and Controls Operation switch infrared switch Names and Functions of Display and ControlsLCD display Instructions Counter in operaiton Resets the counter Functions of each switchMeasurement mode Menu display Setting mode Display Format Measured value display formatFlow velocity value and instantaneous flow rate display Total count display Total flow value displayTotal difference flow value display Custom unit display Percent display Mode Switching Error message / other message displayFixed output display ENTER111 6F8A0917 Moving to the menu display Setting Mode Operation To return from the menu display to the measurement mode Checking or changing the setting values Mode switching flow when password is set Password Input Example of password input mode selection SET and password Totalizer Operation Example of totalizer operation Example to move to the maintenance menu Maintenance Menu Return to measurement mode Setting Menu List Parameter Setting Items Parameter Settings / Adjustment Parameters Check / Change Exciting Current ValueChecking the exciting current value Changing the exciting current value Checking the meter size of the detector Meter Size Changing the meter size of the detector 26 to 120 500 to 3000 mm Exciting FrequencyChecking the exciting frequency 10,1/6,1/4 2.5 to 6 mm Changing the setting value for exciting frequency Checking the flow direction Flow Direction Changing the flow direction Switch Checking the password Password Setting Changing the password Indicates the value in percent of the setting range Normal Indicating UnitChecking the normal indicating unit Currently set main indicating unit % in this example Changing the flow direction for total flow Custom Unit Coefficient of custom unitUnit string of custom unit Checking the coefficient of custom unit Changing the coefficient of custom unitProceed as follows to check the coefficient of custom unit Checking the unit string of custom unit Changing the unit string of custom unitProceed as follows to check the unit string of custom unit Range type Span Value Range Unit of span Span value Span value range setting flow Setting sequence of span value range is shown belowHysteresis Range 4 span value Checking each constantRange 2 span value Range 3 span value Changing the range type Changing the span value Changing the hysteresis Damping Constant Checking the damping constantProceed as follows to check the damping constant Changing the damping constant Low Cutoff value Checking the low cutoff valueProceed as follows to check the low cutoff value Changing the low cutoff value Current Output Setting Used When an Alarm Occurs Current output setting function used when an alarm occursChecking the current output value used when an alarm occurs Changing the current output value used when an alarm occurs Checking whether the display low cut is On or Off Display low cut On/Off Changing the display low cut On/Off setting Proceed as follows to check the output low limit value Output Low Limit SettingChecking the output low limit value setting Output low limit value Changing the output low limit value setting Digital output state only when alarm output is set Digital I/O FunctionDigital output functions corresponding to each terminal Digital Input Function Digital Output Checking each setting for digital I/ODigital Output alarm state Digital Input control signal level Digital Output alarm status Changing each setting for digital I/O Pulse width mode Count Rate Pulse Rate and Pulse WidthCount rate Over Spec Pulse width Checking the count rate and pulse width Changing the count ratePulse width Changing the pulse width mode setting Changing the pulse width Preset Counter Preset count valuePreset output function Changing the preset count value Checking the preset counter setting 100 Changing the preset output function 101 Flow Rate High/Low limit AlarmHigh/low limit alarm On/Off High/low limit value 102 Checking the high/low limit alarm settingHigh-high limit alarm Low-low limit alarm On/Off 103 Changing the high/low limit alarm On/Off 104 Changing the high/low limit value 105 Fluid Empty AlarmSetting the fluid empty alarm Checking the fluid empty alarm On/Off setting 106 Changing the fluid empty alarm On/Off setting Self-diagnosis function On/Off setting Self-Diagnosis Function107 Alarm output factor setting Checking the self-diagnosis alarm setting108 109 Changing the self-diagnosis function setting Rate-of-change control time Checking the rate-of-change limit settingRate-of-Change Limit Value and Control Time Rate-of-change limit value 111 Changing the rate-of-change limit setting 112 Initial Settings When Shipped from the Factory 113 Fixed current output value Fixed value output On/Off settingFixed output mode can be selected by the setting as follows Fixed Value Output Loop Check Checking the fixed output function setting Fixed pulse output value115 116 Changing the fixed output function 117 Changing the fixed output constant Zero Adjustment Still Water Zero Adjustment118 119 120 Zero Offset AdjustmentHow to calculate the zero offset value Checking the zero offset adjustment value 121 Changing the zero offset adjustment value Mag-Prover Calibration Calibration Items122 Calibrating the zero point Converter Check / Calibration1 0% Flow Rate Calibration Zero Calibration Checking the zero point 50% flow rate value can be checked only 2 50% Flow Rate CalibrationChecking the 50% flow rate value 124 125 3 100% Flow Rate Calibration Span CalibrationChecking the span value Calibrating the span value Checking the Exciting Current Value 126Monitor value of the exciting current can be checked 127 Function Description 128 Digital I/O SpecificationsDigital Outputs Digital Input option 129 Totalizer and Pulse Output 130 131 Totalizer operation using digital input signals 132 Multi-Range Functions Output performance when multiple ranges are used Single direction internal automatic switching, 4 ranges133 Output when switched from Reverse to 134Forward direction Direction 135 Single direction external signal switching, 2 ranges 136 137 Single direction external signal switching, 4 ranges Case of Single range Flow Rate High/Low Limit Alarm OutputFlow rate high/low limit alarm output performance 138 139 Case of Multi-range setting 140 141 Fluid Empty Alarm OutputOutput when an alarm is generated Alarm output state described in 8.2.14 Digital I/O Function 142 Preset Counter Output Function 143 Preset counter output performance 144 Output example of one-shot pulse output 145 146 Remote Still Water Zero Adjustment 147 Remote Selection of Fixed Value Output 148 Converter Error Alarm Output Communications Function Connection with the HHT terminal149 Connection to the Converter Main Unit 150 151 Procedure for Communication with HHT Current output load Wiring cableInterference on 4 to 20mA current signal Use a shielded cable CVV-S, etc for wiring High/low limit alarm Diagnosis and AlarmsDiagnostic messages Setting error Process error alarm Fluid empty alarm154 155 Self-diagnosis error 156 Output When an Error or Alarm Occurs Maintenance Maintenance and Inspection 158 Check / Replacement of power supply unitProduct disposal Operative life Troubleshooting Flow rate is not indicated159 160 Flow rate indication is not correct 161 Flow rate indication is not stable 162 When switch operation is unable Principle of Operation 163= K × B × D × Q 164 SpecificationsSpecifications Detector Combined Specifications 165 166 Converter specifications 167 168 169 Model Number Table 170 Gross mass approx lb8kg including a mounting plate Outline Drawing171 Electromagnetic Flowmeter Converter LF232 Type 172 FCF50017