Span value, Unit of span | Toshiba L5232 guide

6F8A0917

Span value

The span value can be set using the actual flow rate unit (m3/h, etc.) and flow velocity unit (m/s).

(1)Setting range

The span value can be set within the range of 0 –1.0 ft/s to 0 – 32.8 ft/s (0.1m/s to 10m/s) in terms of flow velocity

(The range that detector can measure changes with detector type. The details please refer to Chapter 15 "specifications")

If you try to set a span value outside of this range, either of the following messages appears depending on whether it is a high limit or low limit error:

*H. OVER SPEC. (if a value exceeding 32.8 ft/s (10 m/s) is set)

*L. OVER SPEC. (if a value of less than 1.0 ft/s (0.1 m/s) is set)

Try to set a new value again.

In the case of Single range setting, select Range 1 only.

(2)Multi-range setting

To use the multi-range function, select Ranges 1 to 4.

When you set these ranges, the following condition must be observed:

Range 1 > Range 2 > Range 3 > Range 4 (in the case of single direction, multiple ranges)

Range 1 > Range 2, Range 3 > Range 4 (in the case of forward/reverse direction, multiple ranges)

If you try to set the ranges not conforming to the above condition, the following message appears:

* MULTI RNG ERR

Try to set the ranges again.

In addition, set “0” for the ranges not used.

(3)Influence on count rate (pulse rate)

If the range is changed when the count rate (pulse rate) is already set, pulse output at the time of 100% output may exceed the allowable output range.

If this happens, either of the following messages appears after the ranges are set and the system goes to the count rate setting.

*H. OVER C RATE or * L. OVER C RATE

Try to set the count rate (pulse rate) again referring to 8.2.15 “Count Rate (pulse rate) and Pulse Width.”

Unit of span

Range 1 is used to set the unit of span. The unit applies automatically to other ranges of Range 2 to Range 4 and it is not necessary to set the unit for these ranges separately.

The setting units can be selected from the following units:

•Flow velocity unit: m/s

• Flow rate unit:

m3/s, m3/min, m3/h, m3/d, l/s, l/min, l/h, l/d, ml/s, ml/min, ml/h, ml/d

If you change the unit, the new span value based on the newly set unit will be automatically displayed.

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Toshiba L5232 manual Span value, Unit of span

Contents

Electromagnetic Flowmeter Converter LF232 Type 6F8A0917 6F8A0917 Nd Edition August First Edition June Color explanation Explanation of signal wordsSafety symbols Safety Precautions Safety Precautions for Installation and Wiring Usage limitation Safety Precautions for Maintenance and InspectionWarranty and Limitation of Liability Handling Precautions Do not store or install the flowmeter Handling Precautions Table of Contents 6F8A0917 6F8A0917 Storage Product Inspection and StorageProduct Inspection Features Overview Names of Parts Appearance Internal structure with converter cover opened Terminal block construction Installation Hands 6F8A0917 How to Install the Converter Unit inch mm Example of Pipe Mounting From mains power WiringUrn off mains power before working on pipes Do not conduct wiring work with bare hands Installation Cables Installation Cables External Connections 6F8A0917 Excitation cable Wiring MethodTerminal Treatment of Cables Connecting the input signal cable Terminal Treatment of Flow Rate Signal Cable Power cable, current output cable and digital I/O cables Cable Connection Connection to Terminal Block 9a Wiring between Detector and Converter Grounding Difficult 10 Detector Grounding Method Digital I/O Connections 11 Connection Example of Electromagnetic Counter Replacing the LF230 Converter InstallationWiring 12 How to Connect an Adjusting Capacitor Combination with an Existing Detector for Large Meter Size Replacement of partially filled pipes type 6F8A0917 Operation 6F8A0917 Display and Controls Display and Controls LCD display Operation switch infrared switchNames and Functions of Display and Controls Instructions Menu display Setting mode Functions of each switchMeasurement mode Counter in operaiton Resets the counter Flow velocity value and instantaneous flow rate display Display FormatMeasured value display format Total difference flow value display Total count displayTotal flow value display Percent display Custom unit display Fixed output display Mode SwitchingError message / other message display ENTER111 6F8A0917 Setting Mode Operation Moving to the menu display To return from the menu display to the measurement mode Checking or changing the setting values Password Input Mode switching flow when password is set Example of password input mode selection SET and password Totalizer Operation Example of totalizer operation Maintenance Menu Example to move to the maintenance menu Setting Menu List Return to measurement mode Parameter Settings / Adjustment Parameter Setting Items Checking the exciting current value Parameters Check / ChangeExciting Current Value Changing the exciting current value Meter Size Checking the meter size of the detector Changing the meter size of the detector 10,1/6,1/4 2.5 to 6 mm Exciting FrequencyChecking the exciting frequency 26 to 120 500 to 3000 mm Changing the setting value for exciting frequency Flow Direction Checking the flow direction Switch Changing the flow direction Password Setting Checking the password Changing 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 Span Value Range Range type Span value Unit of span Hysteresis Span value range setting flowSetting sequence of span value range is shown below Range 3 span value Checking each constantRange 2 span value Range 4 span value Changing 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 Display low cut On/Off Checking whether the display low cut is On or Off Changing the display low cut On/Off setting Output low limit value Output Low Limit SettingChecking the output low limit value setting Proceed as follows to check the output low limit value Changing 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 Input control signal level Checking each setting for digital I/ODigital Output alarm state Digital Output Changing each setting for digital I/O Digital Output alarm status Count rate Pulse width modeCount Rate Pulse Rate and Pulse Width Pulse width Over Spec Pulse 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 Checking the preset counter setting Changing the preset count value Changing the preset output function 100 High/low limit value Flow Rate High/Low limit AlarmHigh/low limit alarm On/Off 101 Low-low limit alarm On/Off Checking the high/low limit alarm settingHigh-high limit alarm 102 Changing the high/low limit alarm On/Off 103 Changing the high/low limit value 104 Checking the fluid empty alarm On/Off setting Fluid Empty AlarmSetting the fluid empty alarm 105 Changing the fluid empty alarm On/Off setting 106 107 Self-diagnosis function On/Off settingSelf-Diagnosis Function 108 Alarm output factor settingChecking the self-diagnosis alarm setting Changing the self-diagnosis function setting 109 Rate-of-change limit value Checking the rate-of-change limit settingRate-of-Change Limit Value and Control Time Rate-of-change control time Changing the rate-of-change limit setting 111 Initial Settings When Shipped from the Factory 112 113 Fixed Value Output Loop Check Fixed value output On/Off settingFixed output mode can be selected by the setting as follows Fixed current output value 115 Checking the fixed output function settingFixed pulse output value Changing the fixed output function 116 Changing the fixed output constant 117 118 Zero AdjustmentStill Water Zero Adjustment 119 Checking the zero offset adjustment value Zero Offset AdjustmentHow to calculate the zero offset value 120 Changing the zero offset adjustment value 121 122 Mag-Prover CalibrationCalibration Items Checking the zero point Converter Check / Calibration1 0% Flow Rate Calibration Zero Calibration Calibrating the zero point 124 2 50% Flow Rate CalibrationChecking the 50% flow rate value 50% flow rate value can be checked only Calibrating the span value 3 100% Flow Rate Calibration Span CalibrationChecking the span value 125 Monitor value of the exciting current can be checked Checking the Exciting Current Value126 Function Description 127 Digital Input option Digital I/O SpecificationsDigital Outputs 128 Totalizer and Pulse Output 129 130 Totalizer operation using digital input signals 131 Multi-Range Functions 132 133 Output performance when multiple ranges are usedSingle direction internal automatic switching, 4 ranges Forward direction Direction Output when switched from Reverse to134 Single direction external signal switching, 2 ranges 135 136 Single direction external signal switching, 4 ranges 137 138 Flow Rate High/Low Limit Alarm OutputFlow rate high/low limit alarm output performance Case of Single range Case of Multi-range setting 139 140 Alarm output state described in 8.2.14 Digital I/O Function Fluid Empty Alarm OutputOutput when an alarm is generated 141 Preset Counter Output Function 142 Preset counter output performance 143 144 145 Output example of one-shot pulse output Remote Still Water Zero Adjustment 146 Remote Selection of Fixed Value Output 147 Converter Error Alarm Output 148 149 Communications FunctionConnection with the HHT terminal 150 Connection to the Converter Main Unit Procedure for Communication with HHT 151 Use a shielded cable CVV-S, etc for wiring Wiring cableInterference on 4 to 20mA current signal Current output load Setting error Diagnosis and AlarmsDiagnostic messages High/low limit alarm 154 Process error alarmFluid empty alarm Self-diagnosis error 155 Output When an Error or Alarm Occurs 156 Maintenance and Inspection Maintenance Operative life Check / Replacement of power supply unitProduct disposal 158 159 TroubleshootingFlow rate is not indicated Flow rate indication is not correct 160 Flow rate indication is not stable 161 When switch operation is unable 162 = K × B × D × Q Principle of Operation163 Detector Combined Specifications SpecificationsSpecifications 164 165 Converter specifications 166 167 168 Model Number Table 169 170 Electromagnetic Flowmeter Converter LF232 Type Outline Drawing171 Gross mass approx lb8kg including a mounting plate 172 FCF50017