User`s Manual - Test Equipment Depot
Contents
1. 8 3 Other Functions 22a nn n 9 3 1 Sleep FUNCTION 9 3 2 Data Hold Function 9 3 3 OUTPUT Terminal For current ranges only 10 3 4 Optional Accessories 11 4 Battery Replacement 12 5 Specifications 13 6 Calibration and After sales Service 16 A WARNING e Never make measurement on a circuit above 750V AC or 1000V DC e Do not use the instrument in an atmosphere where any flammable or explosive gas is present e Do not attempt to make measurement in the presence of flammable gas ses fumes vapor or dust Otherwise the use of the instrument may cause sparking which can lead to an explosion e Avoid using the instrument if it has been exposed to rain or moisture or if your hands are wet e Do not exceed the maximum allowable input of any measurement range e Never open the battery compartment cover when making measurement e Do not use the instrument if there is any damage to the casing or when the casing is removed e Do not turn the Function Selector switch with plugged in test leads con nected to the2. User s CL250 Manual Clamp on Tester QVAVITFRAFA IM CL250 Test Equipment 99 Washington Street Depot Melrose MA 02176 Fax 781 665 0780 1 800 517 8431 TestEquipmentDepot com JOKCVCAAIA 4 IM CL250 YOKOGAWA 2003 06 2 hk MC Yokogawa M amp C Corporation E Precautions for Safe Use of the Instrument When handling the instrument ALWAYS observe all of the cautionary notes on safety given below Yokogawa M amp C Corporation is not at all liable for damage resulting from misuse of this product by the user that is contrary to these cautionary notes Various symbols are used on the instrument and in this manual to ensure the product is used safety and to protect operators and property from possible hazards or damage The following safety symbols are used where appropri ate Read the explanations carefully and familiarize yourself with the symbols before reading the text The instrument and this manual use the following safety symbols Danger Handle with Care This symbol indicates that the operator must refer to an explanation A in the User s Manual in order to avoid the risk of personal injury or death and or damage to the instrument Oo Double Insulation This symbol indicates double insulation AC Voltage Current This symbol indicates AC voltage or current DC Voltage Current This symbol indicates DC voltage or current AC DC Voltage Current fi This symbol indicates AC DC voltage or current Ground This sy
3. priate terminal on the instrument e Make sure to remove the test leads from the instrument before making current measurement e Be sure to set the Function Selector switch to the OFF position after use When the instrument will not be in use for a long period of time place it in storage after removing the battery e Use a damp cloth and detergent for cleaning the instrument Do not use abrasives or solvents NOTE e Radiation immunity affects the accuracy of CL250 testers under the condi tions specified in EN61000 4 3 1997 e f equipment generating strong electromagnetic interference is located nearly the testers may malfunction IM CL250 iil 1 Instrument Layout a1 12 14 1 Transformer Jaws Pick up current flowing through the conductor 2 Open Close Lever Used to open and close the transformer jaws 3 Function Selector Switch Selects function to use Also switches off the instrument when set to the OFF position 4 Data Hold Button Freezes the display reading with D symbol shown on the display when pushed in Note When the plug is inserted into the output terminal Data Hold Switch operates as range selection switch See section 3 3 OUTPUT Terminal 5 Button Used to switch the instrument between the AC and DC modes The instrument is set to the AC mode when it is powered on Press this button to select the DC mode 6 Button A press of this button on a current or voltage rang
4. CL250 3 mode the buzzer beeps when the reading is about 50Q or less Press the button again to exit the continuity check mode 7 Button Used for zero adjustment on 400A DC range or for reset ting the reading in the MAX mode MH symbol is shown on the display when zero adjustment is enabled on 400A DC range Zero adjustment is available only 400A DC range 8 LCD Display Field effect type of liquid crystal display with maximum counts of 3999 and microprocessor controlled annunciators and the deci mal point AC DC MAX Data Hold DC M S Higg Minus a Resistance MENEN bi a p pa pa V Voltage Continuity check Lf Lf Lf el A Current AUTO ee Low Battery Warning Zero ADJ 9 Terminal Cover Used to enclose the input terminals Lo and Hi when the OUTPUT terminal is in use thus avoiding accidental application of voltage to the instrument 10 OUTPUT terminal for current measurement only Provides DC voltage in proportion to the reading on an AC or DC current range The voltage is used for such purposes as long term monitoring with a recorder or other recording devices This terminal cannot be accessed on a voltage or re sistance range 11 Lo Terminal Accepts the black test lead for voltage or resistance meas urement 12 Hi Terminal Accepts the red test lead for voltage or resistance meas urement 13 Safety Hand Strap Prevents the instrument from slipping off the hand d
5. increase the measuring capability of a clamp meter With the use of the Clamp Adapter you can not only extend current range over 3000A but also clamp on a large bus bar or conductor 1 Set the Function Selector switch to the AZ 400A position 2 Select the AC mode with the button 3 As shown in the figure below clamp MODEL CL250 onto the pickup coil of MODEL 99025 4 Clamp MODEL 99025 onto the bus bar or conductor under test 5 Take the reading on MODEL CL250 and multiply it by 10 NOTE For the detailed specification refer to the Clamp Adapter User s Manual IM CL250 11 3 3 OUTPUT Terminal For current measurement only A WARNING e Do not make measurement on a circuit above 750VAC or 1000VDC This may cause electric shock hazard e Never apply voltage to the OUTPUT terminal 1 To obtain output voltage from the OUTPUT terminal connect a suitable cord to the supplied output plug 5 a a OAV SO 2 Slide the terminal cover to the right to enclose the Lo and Hi terminals Insert the output plug into the OUTPUT terminal for connection with a re corder or other recording device 3 Set the Function Selector switch to the AZ 400A or AZ 2000A posi tion The output is available only in the two ranges Proceed to meas urement in the DC or AC mode NOTE e In the DC mode the output voltage from the OUTPUT terminal may not reduce to nil even if the display is zero adjusted with th
6. circuit under test e Do not install substitute parts or make any modification to the instrument Return the instrument to Yokogawa M amp C or your distributor for repair or re calibration e Always switch off the instrument before opening the battery compartment cover for battery replacement ji IM CL250 A WARNING To avoid damage to the instrument or electric shock The restrictions on the maximum voltage level for which the CL250 testers can be used depend on the over voltage categories specified by the safety standards These category specifications are formulated to protect operators against transient impulse voltages in power lines CATEGORY II CATEGORY III AC 2000A rms AC 2000A rms Measuring circuit voltage Measuring circuit voltage AC 750V rms AC 600V rms DC 1000V DC 600V AC 750V rms DC 1000V A V D V pi oi to SOUNA AO 750V ms DC 1000V AC 750V rmsiDC 100V 750V rms DC 1000V C 600V rms DC 600 Over voltage category CAT I Signal level special equipment or parts of equipment telecommunication electronic etc with smaller transient over voltages than CAT II Over voltage category II CAT II Local level appliance portable equipment etc with smaller transient over voltages than CAT III Over voltage category III CAT III Distribution level fixed installation with smaller transient over voltages than CAT IV A CATION e Always make sure to insert each plug of the test leads fully into the appro
7. e button In this case make zero adjustment on the recorder or other device that the output voltage is connected to e The Sleep function is disabled while the output plug is inserted into the OUTPUT terminal When the output plug is disconnected from the terminal the Sleep function is enabled in about 10 minutes e Set the appropriate sensitivity on the recorder or other recording device See chapter 5 Specifications 10 IM CL250 4 Battery Replacement A WARNING To avoid electric shock hazard make sure to set the Function Selector switch to OFF and remove the test leads from the instrument before trying to re place batteries A CAUTIOIN e Do not mix new and old batteries e Make sure to install batteries in correct polarity as indicated in battery compartment If the instrument is powered on but the display blanks or Zig is shown on the lower left corner of the display replace the batteries Note that when the battery is completely exhausted the display blanks with out EZ shown 1 Set the Function Selector switch to the OFF position 2 Unscrew and remove the battery compartment cover on the bottom of the instrument 3 Replace the batteries observing correct polarity Make sure to use two new ROP batteries 4 Replace and screw the battery compartment cover 12 IM CL250 5 Specifications E Instrument Specifications e Measuring Ranges and Accuracy at 2345 C 45 to 85 relative humidit
8. e turns the instrument to the MAX measurement mode with Z shown on the display Press the button again to exit the MAX mode A press of the button on the resistance range turns the instrument to the continuity check mode with symbol shown on the display In this IM CL250 1 2 Measurement 2 1 Preparation for Measurement A CAUTION e The jaw section is a delicate precision sensor Do not subject the jaw to unreasonably strong shock vibration or force when using it e f dust gets into the tops of the jaws remove it immediately Do not close the jaws when dust is trapped in its joints as the sensor may break e Please check that the range and mode are set to the desired position before measurement 2 2 DC Current Measurement A WARNING e Do not make measurement on a circuit above 1000VDC This may cause shock hazard e Do not make current measurement with the test leads connected to the instrument 1 Set the Function Selector switch to the A gt 400A position and press the button to select the DC mode DC should be shown on the upper left corner of the display 2 With the transformer jaws closed without clamping them onto the con ductor press the button for about one second to zero adjust the display C4 button is enabled only on 400A DC range i should be shown on the display 3 Set the Function Selector switch to the position appropriate for the order of the current under test IM
9. inals 1 Set the Function Selector switch to the AZ 400A or A gt 2000A posi tion and select the AC mode If the instrument is in the DC mode press the button once to select the AC mode The instrument is set to the AC mode when it is powered on AC should be shown on the upper left corner of the display 4 IM CL250 2 Press the open close lever to open the transformer jaws and clamp them onto the conductor under test and take the reading on the display The most accurate reading will be obtained by keeping the conductor at the center of the transformer jaws NOTE e During current measurement keep the transformer jaws fully closed Oth erwise accurate measurement cannot be made The Maximum measur able conductor size is 55mm in diameter e Unlike in DC current measurement zero adjustment is not necessary in AC current measurement There is no polarity in the reading either e The output voltage from the OUTPUT terminal may not reduce to nil even if the display is zero adjusted with the button In this case make zero adjustment on the recorder or other device that the output voltage is connected to 2 4 DC Voltage Measurement A WARNING Do not make measurement on a circuit above 1000VDC This may cause electric shock hazard Red test lead Black test lead 1 Set the Function Selector switch to the A gt 400V or 1000V posi tion If the instrument is in the AC mode press the button once t
10. lack test lead into the Lo terminal 3 Press the button to select the continuity check mode The symbol should be shown on the display 4 Check that the display reads OL Then short together the tip of the test leads and make sure that the display reads 0 and the buzzer beeps IM CL250 T 3 Connect the other end of the tip of the red test lead the positive side of the circuit under test and the tip of the black test lead to the negative side Take the reading on the display If the test lead connection is reversed the sign is shown on the display 2 5 AC Voltage Measurements A WARNING Do not make measurement on a circuit above 750V AC This may cause electric shock hazard Red test lead Black test lead 1 Set the Function Selector switch to the AZ 400V or 750V position If the instrument is in the DC mode press the button once to se lect AC mode The instrument is set to the AC mode when it is powered on The AC should be shown on the upper left corner of the display 2 Slide the terminal cover to the left Plug the red test lead into the Hi ter minal and black test lead into the Lo terminal 3 Connect the tip of the test leads to the circuit under test Take the reading on the display 6 IM CL250 5 Connect the tip of the test leads to the circuit under test The buzzer beeps when the resistance is about 50Q or less NOTE e When the tip of the test leads is shorted toge
11. mbol indicates ground earth A WARNING Indicates that there is a possibility of serious personal injury or loss of life if the operating procedure is not followed correctly and describes the precau tions for avoiding such injury or loss of life A CAUTION Indicates that there is a possibility of serious personal injury of damage to the instrument if the operating procedure is not followed correctly and describes the precautions for avoiding such injury or damage NOTE Draws attention to information essential for understanding the op eration and features IM CL250 i Contents E Precautions for Safety Use of the Instrument i 1 Instrument Layout 1 2 Measurement 3 2 1 Preparation for Measurement 3 2 2 DC Current Measurement 3 2 3 AC Current Measurement nnn nnn 4 2 4 DC Voltage Measurement 5 2 5 AC Voltage Measurement 6 2 6 Resistance Measurement 7 2 7 Continuity Check 400Q range fixed 7 2 8 MAX Measurement
12. n order to conserve battery life This function causes the instrument to switch to the Sleep powered down mode about 10 minutes after the last switch or button operation To exit the Sleep mode press any button or turn the Function Selector switch back to OFF then to any other position lt How to disable the Sleep function gt Powering the instrument on with the Data Hold button pressed disables the Sleep function P OFF is shown on the display for about 3 seconds to indi cate this To enable the Sleep function turn the Function Selector switch back to OFF then to any other position NOTE The Sleep function is disabled while the output plug is inserted into the OUTPUT terminal When the output plug is disconnected from the terminal the Sleep function is enabled in about 10 minutes 3 2 Data Hold Function This is a function used to freeze the measured value on the display Press the Data Hold button to freeze the reading The reading will be held regardless of subsequent variation of current voltage or resistance under test aj is shown on the upper right corner of the display To exit the Data Hold mode press the Data Hold button again NOTE e The Data Hold mode is disabled when the instrument switches to the Sleep mode e The Data Hold function is disabled in the MAX measurement mode IM CL250 9 3 4 Optional Accessories MODEL 99025 For AC current measurement only Clamp Adapter Model 99025 is designed to
13. o select the DC mode The instrument is set to the AC mode when it is powered on DC should be shown on the upper left corner of the dis play 2 Slide the terminal cover to the left Plug the red test lead into the Hi ter minal and the black test lead into the Lo terminal IM CL250 5 2 6 Resistance Measurement A WARNING Never try to make measurement on a circuit that is not de energized Black test lead Red test lead 1 Set the Function Selector switch to the Q position The Q should be shown on the upper right corner of the display 2 Slide the terminal cover to the left Plug the red test lead into the Hi ter minal and the black test lead into the Lo terminal 3 Check that the display reads OL Then short the tip of the test leads together and check that the display reads 0 4 Connect the tip of the test leads to the circuit under test and take the reading on the display NOTE e When the tip of the test leads is shorted together the display may read a very small resistance instead of 0 This is the resistance of the test leads not fault e f one of the test leads has a break the display reads OL 2 7 Continuity Check 400Q range fixed A WARNING Never try to make measurement on a circuit that is not de energized 1 Set the Function Selector switch to the Q position 2 Slide the terminal cover to the left Plug the red test lead into the Hi ter minal and the b
14. of conductor position Within 1 5 rdg 3dgt of indicated value at the center to a 10 mm dia conductor carrying 100A at every part inside the jaws e Effect of external magnetic field 4A or less in AC or DC magnetic field of 400 A m Power Source Two R6P DC1 5V batteries or equivalent Battery Life Approx 100 hours continuity Current Consumption About 9mA max Sleep Function Automatically switches to the Sleep mode in Approx 10 minutes after the last switch or button operation current consumption in the Sleep mode Approx 20uA 14 IM CL250 6 Calibration and After sales Service Should any failure occur while you are using the tester follow the instructions given below If the tester still fails to operate correctly and needs repair con tact the vendor from whom you purchased the instrument or the nearest Yokogawa M amp C sales office e Turn off the POWER switch once then turn it back on again e Ifthe tester does not turn on replace the battery with a new one Calibration It is recommended that the instrument be calibrated once every year Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 FAX 781 665 0780 TestEquipmentDepot com IM CL250 15 16 IM CL250
15. ries 2 Carrying case Model 93034 1 Output Plug Model 98012 1 User s Manual wie Giese ee ewisintetaoetovese wre aie werere 1 e Optional Accessories Clamp adapter Model 99025 Output cable for terminal screw Model 91019 OUTPUT Output impedance about 10kQ Measuring Range Input voltage 400A 0 to 400 0mV 0 to 400A AC 1 5 rdg 3mV 2000A 0 to 200 0mV 0 to 2000A 400A 0 to 400 0mV 0 to 400A 1 5 rdg 3mV 50 60Hz 3 0 rdg 3mV 0 to 100 0mV 0 to 1000A 40 to 500Hz 2000A 5 0 rdg 3mV 500 to 1kKHz 3 0 rdg 3mV Electromagnetic compatibility IEC61000 4 3 RF field strength lt 1V m total accuracy specified accuracy RF field strength 3V m total accuracy specified accuracy 2 of range E General Specifications e Operating System Dual integration Measurement Function DC Current AC Current DC Voltage AC Voltage Resistance Continuity Check Display Liquid crystal display with maximum counts of 3999 Overrange Indication OL is shown on the display Response Time Approx 2 seconds Sample Rate Approx 2 5 times per second Temperature and Humidity for Guaranteed Accuracy 23 C 5 C relative humidity up to 85 without condensation e Operating Temperature and Humidity 0 to 40 C relative humidity up to 85 without condensation e Storage Temperature and Humidity 20 to 60 C relative humidity up to 85 without condensation e Effect
16. ther the display may read a very small resistance instead of 0 This is the resistance of the test leads not a fault e f one of the test leads has a break the display reads OL 2 8 MAX Measurement Response time 400ms The MAX measurement mode is used to display a maximum reading over a certain period of time This function is available on all ranges other than Q ranges A WARNING e Do not make measurement on a circuit above 750VAC or 1000VDC This may cause electric shock hazard e Do not make measurement with the test leads connected to the instru ment 1 Set the Function Selector switch to the desired position 2 Press the button to select the MAX measurement mode IMI should be shown on the display 3 In order to take a correct reading press the button once after clamping the jaws onto the conductor or connecting the test leads to the circuit under test 4 The display shows the maximum reading during measurement 5 Press the button once again to return to the normal measurement mode NOTE e Data Hold function is disabled in MAX measurement mode e For measurement over a period more than 10 minutes disable the Sleep function according to the User s Manual in section 3 1 Sleep Function Otherwise the instrument automatically turns itself off in about 10 minutes 8 IM CL250 3 Other Functions 3 1 Sleep Function This is a function to prevent the instrument from being left powered on i
17. uring use 14 Test Leads Model 98011 Connect to Lo and Hi terminals for voltage or resistance measurement 15 Output Plug Model 98012 Insert this plug into the OUTPUT terminal to obtain DC output voltage Connect suitable connection cord to the plug when it is used See section 3 3 OUTPUT Terminal 2 IM CL250 4 Press the open close lever to open the transformer jaws and clamp them onto the conductor under test and take the reading on the display The most accurate reading will be obtained by keeping the conductor at the center of the transformer jaws NOTE e During current measurement keep the transformer jaws fully closed Oth erwise accurate measurement cannot be made The maximum measur able conductor size is approx 55mm in diameter e When the current flows from the upside the display side to the underside of the instrument the polarity of the reading is positive and vice versa e The output voltage from the OUTPUT terminal may not reduce to nil even if the display is zero adjusted with the button In this case make zero adjustment on the recorder or other device that the output voltage is connected to e Turing the Function Selector switch to a position other than DCA cancels the zero adjustment 2 3 AC Current Measurement A WARNING e Do not make measurement on a circuit above 750V AC This may cause shock hazard e Do not make current measurement with the test leads connected to the Hi and Lo term
18. y DC Current Measuring Ranges 400A 0 to 400 0A oe 2000A 0 to 2000A AC Current A Measuring Ranges 400A 0 to 400 0A 1 5 rdg 2dgt 50 60Hz 3 0 rdg 4dgt 40 to 500Hz 2000A PONORA 5 0 rdg 4dgt 500 to 1kHz 1001 to 2000A 3 0 rdg 2dgt 50 60Hz DC Voltage V Input impedance 2MQ Measuring Ranges 400A 0 to 400 0A 1 0 rdg 2dot 1000A 0 to 1000A OANgg Feed AC Voltage V Input impedance 2MQ Range Measuring Ranges Accuracy 400A 0 to 400 0A 1 5 rdg 2dgt 50 60Hz 750A 0 to 750A 1 5 rdg 4dgt 40 to 1kHz Resistance Q Auto ranging Measuring Range 4000 to 4 1 5 rdg 2dgt 40000 0 to 40000 rdg g Resistance Continuity check Q Range Fixed Measuring Range 4000 0 to 400 00 elena tag BEAJ aa Buzzer beeps at 50 35Q or less IM CL250 13 e Withstanding Voltage 5500V AC for 1 minute between electrical circuit and housing cases or metal parts of jaws e Insulation Resistance 10MQ or greater at 1000V between electrical circuit and housing cases or metal parts of the jaws Conductor Size Approx 55mm diameter max Dimensions Approx 105 W x 250 H x 49 D mm Weight Approx 530g with batteries Safety Standard EN 61010 1 EN 61010 2 031 EN 61010 2 032 AC DC 600V CAT III AC DC 1000V CAT II Pollution degree 2 indoor use e EMC Standard EN 61326 EN 55022 e Accessories Test leads Model 98011 1set RGP SUM3 batte
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