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Toshiba L5232 manual 130

Models: L5232

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6F8A0917

*Continued from the previous page Clear (reset) the totalizer. (Note1)

Press switch to clear the count.

If you have changed the count rate, clear (reset) the count before you start the totalizer.

Start the totalizer. (Note1)

•Press to start the totalizer.

Check that “C” is shown on the display indicating that counting is in progress.

Note 1: The LF232 converter has the function to start/stop the totalizing operation or clear the internal totalizer.

For details of how to operate the totalizer, see 7.3.4 “Totalizer Operation.” Note 2: Example of count rate setting range

Count rate can be set in the range of minimum value (3,600,000 pulses/h) to maximum value (3.6 pulses/h) with respect to the set range

Example:

When the range is 3,600m3/h (1m3/s), settable count rate is as

follows:

Minimum value: 3,600m3/h ÷ 3,600,000 pulses/h = 0.001m3 = 1 l (liter)

Maximum value: 3,600m3/h ÷ 3.6 pulses/h = 1,000m3

Note 3: Example of pulse width setting range (in the case of manual setting)

Pulse width can be set within the range of 0.3ms to 500ms in increments of 0.1ms. However, the pulse width must be 40% or less of the full-scale period.

Example 1: In the case of the following: Range: 3600m3/h (1m3/s) Count rate: 0.001m3

Since the count rate is 3,600 m3/h ÷ 0.001(m3) = 3,600,000 pulses/h (1000 pulse/s), the full scale period is 1s ÷ 1000 = 1ms.

Therefore, pulse width can only be set to 1ms x 0.4 = 0.4ms.

Example 2: In the case of the following Range: 3,600m3/h (1m3/s) Count rate: 1000m3

Since the count rate is 3,600m3/h ÷ 1000m3 = 3.6 pulses/h (0.001 pulse/s), the full scale period is 1s ÷ 0.001 = 1000s.

Therefore, pulse width becomes 1000s × 0.4 = 400s.

However, since the maximum value is 500ms, pulse width becomes 500ms.

Example 3: In the case of the following Range: 3,600m3/h (1m3/s) Count rate: 1m3

Pulse width is set to 0ms

Since the count rate is 3,600m3/h ÷ 1m3 = 3600 pulses/h (1 pulse/s), the full scale period is 1s ÷ 1 = 1s.

Therefore, pulse width becomes 1s × 0.4 = 400ms.

However, since the maximum value is 100ms, pulse width becomes 100ms.

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Toshiba L5232 manual 130

Contents

6F8A0917 Electromagnetic Flowmeter Converter LF232 TypeNd Edition August First Edition June 6F8A0917Color explanation Explanation of signal wordsSafety symbols Safety Precautions for Installation and Wiring Safety PrecautionsUsage limitation Safety Precautions for Maintenance and InspectionWarranty and Limitation of Liability Do not store or install the flowmeter Handling PrecautionsHandling Precautions Table of Contents 6F8A0917 6F8A0917 Storage Product Inspection and StorageProduct Inspection Overview FeaturesAppearance Names of PartsInternal structure with converter cover opened Terminal block construction Hands Installation6F8A0917 Unit inch mm How to Install the ConverterExample of Pipe Mounting Do not conduct wiring work with bare hands WiringUrn off mains power before working on pipes From mains powerInstallation Cables Installation CablesExternal Connections 6F8A0917 Excitation cable Wiring MethodTerminal Treatment of Cables Terminal Treatment of Flow Rate Signal Cable Connecting the input signal cableCable Connection Power cable, current output cable and digital I/O cablesConnection to Terminal Block Grounding 9a Wiring between Detector and Converter10 Detector Grounding Method Difficult11 Connection Example of Electromagnetic Counter Digital I/O ConnectionsReplacing the LF230 Converter InstallationWiring Combination with an Existing Detector for Large Meter Size 12 How to Connect an Adjusting CapacitorReplacement of partially filled pipes type 6F8A0917 Operation 6F8A0917 Display and Controls Display and ControlsLCD display Operation switch infrared switchNames and Functions of Display and Controls Instructions Counter in operaiton Resets the counter Functions of each switchMeasurement mode Menu display Setting modeFlow velocity value and instantaneous flow rate display Display FormatMeasured value display format Total difference flow value display Total count displayTotal flow value display Custom unit display Percent displayFixed output display Mode SwitchingError message / other message display ENTER111 6F8A0917 Moving to the menu display Setting Mode OperationTo return from the menu display to the measurement mode Checking or changing the setting values Mode switching flow when password is set Password InputExample of password input mode selection SET and password Totalizer Operation Example of totalizer operation Example to move to the maintenance menu Maintenance MenuReturn to measurement mode Setting Menu ListParameter Setting Items Parameter Settings / AdjustmentChecking the exciting current value Parameters Check / ChangeExciting Current Value Changing the exciting current value Checking the meter size of the detector Meter SizeChanging 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 mmChanging the setting value for exciting frequency Checking the flow direction Flow DirectionChanging the flow direction SwitchChecking the password Password SettingChanging the password Checking the normal indicating unit Indicates the value in percent of the setting rangeNormal Indicating Unit Currently set main indicating unit % in this example Changing the flow direction for total flow Unit string of custom unit Custom UnitCoefficient of custom unit Proceed as follows to check the coefficient of custom unit Checking the coefficient of custom unitChanging the coefficient of custom unit Proceed as follows to check the unit string of custom unit Checking the unit string of custom unitChanging the unit string of custom unit Range type Span Value RangeUnit of span Span valueHysteresis Span value range setting flowSetting sequence of span value range is shown below Range 4 span value Checking each constantRange 2 span value Range 3 span valueChanging the range type Changing the span value Changing the hysteresis Proceed as follows to check the damping constant Damping ConstantChecking the damping constant Changing the damping constant Proceed as follows to check the low cutoff value Low Cutoff valueChecking the low cutoff value Changing the low cutoff value Checking the current output value used when an alarm occurs Current Output Setting Used When an Alarm OccursCurrent output setting function 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/OffChanging 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 valueChanging the output low limit value setting Digital output functions corresponding to each terminal Digital output state only when alarm output is setDigital I/O Function Digital Input Function Digital Output Checking each setting for digital I/ODigital Output alarm state Digital Input control signal levelDigital Output alarm status Changing each setting for digital I/OCount rate Pulse width modeCount Rate Pulse Rate and Pulse Width Over Spec Pulse widthPulse width Checking the count rate and pulse widthChanging the count rate Changing the pulse width mode setting Changing the pulse width Preset output function Preset CounterPreset count value Changing the preset count value Checking the preset counter setting100 Changing the preset output function101 Flow Rate High/Low limit AlarmHigh/low limit alarm On/Off High/low limit value102 Checking the high/low limit alarm settingHigh-high limit alarm Low-low limit alarm On/Off103 Changing the high/low limit alarm On/Off104 Changing the high/low limit value105 Fluid Empty AlarmSetting the fluid empty alarm Checking the fluid empty alarm On/Off setting106 Changing the fluid empty alarm On/Off setting107 Self-diagnosis function On/Off settingSelf-Diagnosis Function 108 Alarm output factor settingChecking the self-diagnosis alarm setting 109 Changing the self-diagnosis function settingRate-of-change control time Checking the rate-of-change limit settingRate-of-Change Limit Value and Control Time Rate-of-change limit value111 Changing the rate-of-change limit setting112 Initial Settings When Shipped from the Factory113 Fixed current output value Fixed value output On/Off settingFixed output mode can be selected by the setting as follows Fixed Value Output Loop Check115 Checking the fixed output function settingFixed pulse output value 116 Changing the fixed output function117 Changing the fixed output constant118 Zero AdjustmentStill Water Zero Adjustment 119 120 Zero Offset AdjustmentHow to calculate the zero offset value Checking the zero offset adjustment value121 Changing the zero offset adjustment value122 Mag-Prover CalibrationCalibration Items Calibrating the zero point Converter Check / Calibration1 0% Flow Rate Calibration Zero Calibration Checking the zero point50% flow rate value can be checked only 2 50% Flow Rate CalibrationChecking the 50% flow rate value 124125 3 100% Flow Rate Calibration Span CalibrationChecking the span value Calibrating the span valueMonitor value of the exciting current can be checked Checking the Exciting Current Value126 127 Function Description128 Digital I/O SpecificationsDigital Outputs Digital Input option129 Totalizer and Pulse Output130 131 Totalizer operation using digital input signals132 Multi-Range Functions133 Output performance when multiple ranges are usedSingle direction internal automatic switching, 4 ranges Forward direction Direction Output when switched from Reverse to134 135 Single direction external signal switching, 2 ranges136 137 Single direction external signal switching, 4 rangesCase of Single range Flow Rate High/Low Limit Alarm OutputFlow rate high/low limit alarm output performance 138139 Case of Multi-range setting140 141 Fluid Empty Alarm OutputOutput when an alarm is generated Alarm output state described in 8.2.14 Digital I/O Function142 Preset Counter Output Function143 Preset counter output performance144 Output example of one-shot pulse output 145146 Remote Still Water Zero Adjustment147 Remote Selection of Fixed Value Output148 Converter Error Alarm Output149 Communications FunctionConnection with the HHT terminal Connection to the Converter Main Unit 150151 Procedure for Communication with HHTCurrent output load Wiring cableInterference on 4 to 20mA current signal Use a shielded cable CVV-S, etc for wiringHigh/low limit alarm Diagnosis and AlarmsDiagnostic messages Setting error154 Process error alarmFluid empty alarm 155 Self-diagnosis error156 Output When an Error or Alarm OccursMaintenance Maintenance and Inspection158 Check / Replacement of power supply unitProduct disposal Operative life159 TroubleshootingFlow rate is not indicated 160 Flow rate indication is not correct161 Flow rate indication is not stable162 When switch operation is unable= K × B × D × Q Principle of Operation163 164 SpecificationsSpecifications Detector Combined Specifications165 166 Converter specifications167 168 169 Model Number Table170 Gross mass approx lb8kg including a mounting plate Outline Drawing171 Electromagnetic Flowmeter Converter LF232 Type172 FCF50017