Instruction manual INSULATION - CONTINUITY TESTER KEW 3021 3022 3023 KYORITSU ELECTRICAL INSTRUMENTS WORKS,LTD.
Contents 1．Safety warnings ……………………………………………………１ 2．Features ……………………………………………………………３ 3．Specification ………………………………………………………４ 4．Instrument layout …………………………………………………８ 5．Preparation for measurement ……………………………………９ 5−1 Test lead connection ………………………………………９ 5−2 Checks on Test lead and Fuse ……………………………９ 6．Measurement ……………………………………………………10 6−1 Voltage measurement(Mains disconnection check) ……10 6−2 Insulation resistance measurement ………………………10 6−3 Continuous measurement …………………………………13 6−4 Output voltage characte
１．Safety warnings ○ This instrument has been designed, manufactured and tested according to IEC 61010-1: Safety requirements for Electronic Measuring apparatus, and delivered in the best condition after passed the inspection. This instruction manual contains warnings and safety rules which must be observed by the user to ensure safe operation of the instrument and retain it in safe condition. Therefore, read through these operating instructions before using the instrument.
WARNING ¡Never attempt to make any measurement if any abnormal conditions, such as a broken case or exposed metal parts are present on the instrument and test leads. ¡Never press the Test button when connecting the test leads to the instrument. ¡ Never rotate the Range selector switch with the test leads connected to the equipment under test. ¡ Do not install substitute parts or make any modification to the instrument.
２．Features KEW3021/ 3022/ 3023 are four-range digital insulation resistance testers for testing low-voltage installation below 600V.Resistance measurement with audible Continuity check function is also available. ¡Designed to following safety standards: IEC61010-1(CAT.III 600V Pollution degree 2) IEC61010-031 (Requirements for hand-held probes) ¡Small and light weight.
３．Specification ¡Applicable standards IEC 61557 IEC 61010-1 Measurement CAT.III 600V Pollution degree2 (Location for use: altitude 2000m or less) IEC 61010-031 IEC 60529 IP40 ¡Measuring range and accuracy Nominal voltage Auto Range Open circuit voltage Short circuit current Nominal test current 1st effective measurement range Center scale range Accuracy 2nd effective measurement range 1000V KEW3021 500V 250V 0∼4/40/400/2000MΩ Nominal test voltage 0%∼＋20% Within 1.
Nominal voltage Auto Range Open circuit voltage Short circuit current Nominal test current 1st effective measurement range Center scale range Accuracy 2nd effective measurement range Accuracy Accuracy at 0 1000V KEW3023 500V 250V 0∼4/40/400/2000MΩ 100V 0∼4/40/200MΩ Nominal test voltage 0%∼＋20% Within 1.5mA 1MΩ 0.5MΩ 0.25MΩ 1mA 0%∼＋20% 0.1MΩ 0.100∼ 1000MΩ 0.100∼ 200.0MΩ 0.100∼ 40.0MΩ 0.100∼ 20.0MΩ 50MΩ 50MΩ 5MΩ 5MΩ 0∼ 0.099MΩ 1001∼ 2000MΩ ±(2%rdg＋6dgt) 0∼ 0∼ 0.099MΩ 0.099MΩ 200.1∼ 40.
Auto-range Open-circuit voltage(DC) Short-circuit current Measuring range to keep operating error/ tolerance Outside of the measuring range to keep operating error/ tolerance Measured voltage Accuracy Accuracy at 0 0∼40.00/ 400.0Ω 5V±20% DC200mA or more 0.2∼400Ω/ ±(2%rdg + 8dgt) 0∼0.19/Ω0.1Ω 20∼600V ±(3%rdg+6dgt) Within 6dgt Possible number of measurement within the "BATTERY.GOOD" range. (Measure 5 sec., and take pause for 25 sec.
MODEL Continuity range Insulation resistance AC voltage 3022 AC600V All ranges : AC600V AC720V 3021 / 3023 AC600V All ranges:AC1200V AC720V Auto-ranging: Range shifts to upper range : when a reading go over 4200 Range shifts to lower range : when a reading go to less than 320 Dimension : approx. 105(L)×158(W)×70(D)mm Weight : approx. 600g (including batteries) Power source : R6P or LR6 size AA x 6pcs Nominal power : 2.
４．Instrument layout Fig. 2 Instrument layout (KEW3022) ① ③ ⑤ ⑦ ⑨ ⑪ ⑬ Test button ENTER key DOWN key Comp key Safety key LIVE LED Probe socket ② ④ ⑥ ⑧ ⑩ ⑫ ⑭ ⑮ ⑰ ⑲ 21 ○ Line probe Standard prod (MODEL8072) Probe connector Safety alligator clip (MODEL7131) ⑯ ⑱ ⑳ 22 ○ ―8― Range selector switch MEM key UP key 0ΩADJ.
５．Preparation for measurement 5-1 Test lead connection Insert the Probe connector into the Probe socket on the instrument correctly as shown below. Probe connector Probe socket Fig. 3 5-2 Checks on Test lead and Fuse (1) Set the Range selector switch on the instrument to theΩ (CONTINUITY) position. (2) Break in test lead or fuse is suspected if "OL" is displayed on the LCD when shorting the LINE(red) and EARTH(black).
６．Measurement 6-1 Voltage measurement (Mains disconnection check) (1) Connect the Earth probe to the earth of the circuit under test and Line probe to the other side. If the circuit is not earthed, connect Earth probe to any appropriate conductor. (2) Take the reading on the LCD without pressing the Test button or Remote control switch. The mark "∼" is displayed when measuring AC voltage.
Note: ¡Some circuits have an unstable insulation resistance, which causes the reading to vary during measurement. ¡The instrument may generate a high pitch tone during measurement. This is not a failure. ¡If the circuit under test has a large capacitive load, it may take some time before the final reading can be obtained. ¡On insulation resistance range, DC voltage is supplied through earth and Line probes, with earth probe having positive polarity.
(2) Connect the Earth probe to the earth terminal of the circuit under test. If the circuit is not earthed, connect the Earth probe to any appropriate conductor. (3) Connect the Line probe to the circuit under test and press the Test button or Remote control switch. (4) Take the reading on the LCD. Fig. 6 Fig. 7 Principle of operation: Resistance = Voltage/ Current RX = V/ I (5) Set the Range selector switch to the OFF position and disconnect the test leads from the instrument after measurement.
(6) Set the Range selector switch to the OFF position, and disconnect the probes from the instrument. DANGER ¡Never touch the circuit under test immediately after testing. Capacitance stored in the circuit may cause electric shock. Leave the test leads connected to the circuit until the LIVE LED and LIVE circuit warning stop flickering. 6-3 Continuous measurement For continuous measurement, a lock-down feature is incorporated on the Test button.
Fig. 9 6-5 Measurement of resistance (Continuity check) DANGER ¡Do not apply voltage to the resistance range. Always test the circuit or equipment to ensure it is surely de-energized before measurement. Zero Ω ADJ. function This is a function to null the resistance of the test lead or fuse in order to display the resistance of the equipment under test only. Setting: (1) Set the Range selector switch to theΩ(Continuity) position. (2) Short the test leads: LINE (red) and EARTH (black).
Releasing: (1) Set the Range selector switch to theΩ(Continuity) position. (2) Open the test leads: LINE (red) and EARTH (black). (3) Press the Zero Ω ADJ. key to release this function when "OL" is displayed on the LCD while the Test button is locked or the Remote control switch is pressed down . Measurement: (1) Set the Range selector switch to the Ω (Continuity)position. (2) Connect the test leads to the equipment under test, and press the Test button or Remote control switch.
7．Functions keys 7-1 Comparator function Set a reference resistance value at the insulation resistance range. The measured value is compared to the pre-set reference value, and the mark of or is displayed on the LCD and buzzer Settable reference value: 0.1/0.2/0.25/0.4/0.5/1/2/3/5/10/20/30/50/100/Any : Unit [MΩ] The upper limit of "Any" varies depending on output voltage. 50/100/125Ｖ: 0.000 to 199.9: Unit [MΩ] 250/500/1000Ｖ: 0.000 to 999.9 : Unit [MΩ] This function can be set at each range.
7-2 Memory (save) function Measured insulation resistance can be saved to the internal memory up to 99 data. Saving method: (1) Measure the insulation resistance, and press the MEM key while the message is displayed on the LCD.Then a memory number displayed at the lower left flickers.Select any memory number with the UP or DOWN key, and press the key. (2) Then, the measurement result displayed at the middle on the LCD flickers. Press the key to save the result.
8．Fuse & Battery replacement DANGER ¡Never open the Battery cover during a measurement.Dispose the used batteries according to the rules, which is defined by each community. WARNING ¡To avoid possible electric shock, remove test leads before opening the Battery cover. After replacing batteries, be sure to tighten up the screws for Battery cover. CAUTION ¡Do not mix new and old batteries. Install batteries in correct polarity as marked inside the Battery compartment.
9．Notes on Housing case and accessories 9-1 Case lid Case lid can be fit under the Housing case while making measurement. (1) Unhook and open the Case lid. (2) Turn it 180 degrees. Put the Case lid under the Housing case. (3) Hook it on to the Housing case. Fig. 14 9-2 Neck strap and Cord case This instrument is equipped with a strap to suspend from the neck to allow both hands to be used freely for easy and safe operation. Fig.
9-3 Test prods and replacement 1. Types of Test prods MODEL8072: Standard Test prod Used for ordinary measurement. (Attached to the Line probe at the time of purchase.) MODEL8017: Extension probe Used in difficult-to-reach situations. MODEL8016: Pickle prod (Optional) Used to hook the probe on a conductor. 2. How to replace Test prod To remove the Test prod, turn the cap of LINE probe counterclockwise. Insert the threaded end of another prod into the hexagonal hole on the probe cap as shown.
10．Cleaning of the instrument Cleaning Meter cover ¡When cleaning the instrument, wipe it with a silicon cloth or soft cloth to remove dust or dirt. ¡When it is hard to remove the dirt, wipe it with a cloth wet with water and dry the instrument completely after cleaning. CAUTION ¡Never use any solvent which may transmute plastics, for example, organic solvent such as benzene, acetone, etc.
DISTRIBUTOR KYORITSU ELECTRICAL INSTRUMENTS WORKS, LTD. No.5-20, Nakane 2−chome,Meguro-ku, Tokyo, 152-0031 Japan Phone:81−3−3723−0131 Fax:81−3−3723−0152 URL:http://www.kew-ltd.co.jp E-mail:info@kew-ltd.co.
