INSTRUCTION MANUAL DIGITAL MULTIMETER KEW 1051／1052
Thank you for purchasing our Model KEW1051, KEW1052 Digital Multimeter. This instruction manual describes the specifications and handling precaution for this Digital Multimeter. Before using this Digital Multimeter, thoroughly read this manual to get a clear understanding on proper use. Always observe the following instructions.
Regarding Safe Use of This Product For safe use of this product, the following safety symbols are used on the product and manual: Note WARNING This indicates that the operator must refer to an explanation in the instruction manual in order to avoid the risk of serious injury or the loss of life. CAUTION This indicates that the operator must refer to an explanation in the instruction manual in order to avoid the risk of injury or damage to the product.
WARNING n Always observe the following instructions. Failure to do so may result in electrical shock or other dangers that may lead to serious injury or the loss of life. Test leads / Test leads with crocodile clip (optional accessory) • Use the probes supplied by KYORITSU with this instrument. • Do not use test leads/test leads with crocodile clip that have deteriorated or are defective. Check test leads/test leads with crocodile clip continuity.
Contents 1. 2. 3. 4. 5. 6. 7. 8 Overview.............................................................................................................. 5 Measurement Category........................................................................................ 6 Specifications....................................................................................................... 7 3.1 General Specifications............................................................................... 7 3.2 Accuracy....
1. Overview l Display 4-digit (LCD) Maximum Reading: 6000 Bar graph indicator l Supports a variety of measurement function Measurement function DC Voltage, AC Voltage, DC Current, AC Current, Resistance, Frequency, Temperature, Capacitor, Continuity Check, Diode Test Other functions Data Hold (D•H), Auto Hold (A•H), Range Hold (R•H), Maximum value* (MAX), Minimum value* (MIN), Average value* (AVG), Zero Adjustment (Capacitor, Resistance), Relative values, Save to Memory*, LCD backlight.
2. Measurement Category WARNING n Measurement Category (CAT.) The restrictions on the maximum voltage level for which the KEW1051, KEW1052 can be used, depend on the measurement categories specified by the safety standards. Do not apply any input level higher than maximum allowable input. AC/DC 1000V CAT.III AC/DC 600V CAT.IV Measurement category CAT. I Ⅰ Ⅱ CAT. II Ⅲ CAT.III Ⅳ CAT. Ⅳ Description Remarks For measurements performed on circuits not directly connected to MAINS.
3. Specifications 3.1 General Specifications Measurement function: DC Voltage, AC Voltage, DC Current, AC Current, Resistance, Frequency, Temperature, Capacitor, Continuity Check, Diode Test Other functions: Data Hold (D•H), Auto Hold (A•H), Range Hold (R•H), Maximum value* (MAX), Minimum value* (MIN), Average value* (AVG), Zero Adjustment (Capacitor, Resistance), Relative values, Save to Memory*, LCD backlight.
Withstand voltage: 6.88kVrms AC for five seconds (across input terminals and casing) External dimensions: Approximately 192(L)×90(W)×49(D)mm Weight: Approximately 560g (including batteries) Complied standards: Safety standards IEC61010-1, IEC61010-031 CAT.III (Max. input voltage: AC/DC1000V) CAT.IV (Max. input voltage: AC/DC600V) Pollution degree 2, indoor use, 2000m max.
3.2 Accuracy Test conditions: Temperature and humidity: 23±5ºC at 80%RH or less Accuracy: ±(% of reading + digits) Note: Each response time is a value to rated accuracy within selected range. DC Voltage Measurement Range Resolution 600mV 6V 60V 600V 1000V 0.1mV 0.001V 0.01V 0.1V 1V V Accuracy Input Resistance 0.09+2 10MΩ 11MΩ Maximum Input Voltage 1000V DC 10MΩ 1000V rms AC 0.15+2 NMRR: 60dB or more 50/60Hz±0.1% CMRR: 120dB or more 50/60Hz (Rs=1kΩ) Response time: 1 sec max.
AC Current Measurement [RMS] A RMS value detection, sine wave Range 600μA 6000μA 60mA 440mA 6A 10A Accuracy Resolution 0.1μA 1μA 0.01mA 0.1mA 0.001A 0.01A 50/60Hz 40Hz to 1kHz Voltage Drop Maximum Input Current < 0.12mV/μA 0.75+5 1.5+5 < 3.3mV/mA < 0.1V/A 440mA Protected by a 440mA/1000V fuse. 10A Protected by a 10A/1000V fuse. Accuracy: At 5 to 100% of range, 10A range is 2 to 10A and 440mA range is 30 to 440mA. For non-sinusoidal waveforms, add ±(2% + 2% of full scale), for Crest factor<3.
Temperature Measurement TEMP Range -50 ~ 600°C -58~ 999.9°F -58~ 1112°F Resolution Accuracy Input Protective Voltage 0.1°C 0.1°F 1°F 2+2°C 2+3.6°F 2+3°F 1000V rms Use optional Temperature Probe: Thermocouple Type K Capacitor Measurement Range Resolution Accuracy 10nF 100nF 1μF 10μF 100μF 1000μF 0.01nF 0.1nF 0.001μF 0.01μF 0.1μF 1μF 2+10 2+5 Input Protective Voltage 1000V rms 3+5 Accuracy is specified after zero adjustment at 10n to 1μF (Capacitance).
4. Operation 4.1 Precautions Before Measurement n Examining Items Contained in the Package After opening the package, be sure to examine the product as instructed below before use. Should the delivered product be the wrong model, lack any item, or show any flaw in its appearance, contact the vendor from which you purchased the product. n Precautions of Operation and Storage CAUTION • Insert the batteries in the instrument by referring to “6.1 Battery Replacement.
4.2 Components n Panel Description n Test leads Caps of Test leads Display (LCD) SHIFT key RANGE key HOLD (SAVE) key LIGHT (READ) key SELECT (PRINT) key REL /% key MIN/MAX（LOG) Key （KEW1052 only） MEMORY Key （KEW1052 only） Function switch Input terminal block Red Black Actions indicated in parenthesis are available at Memory Function (KEW1052 only).
1) Function switch Turns off the power or select the measurement mode (function). OFF Ω Turns off the power V AC voltage (V) measurement Capacitor measurement V / Resistance measurement DC voltage (V) measurement DC/AC voltage (mV) measurement mV (SENSOR mode) Continuity Check Diode Test TEMP μA mA A Temperature measurement DC/AC current measurement 2) SELECT key Pressing this key in each measurement modes (function) described above selects other measurement modes (function).
5) LIGHT key Press this key once to turn on the LCD backlight for approximately one minute. The LCD backlight is lit for approximately one minute. (To postpone turned on time, press this key once again.) To cancel the function, hold down this key for more than one second. 6) REL ∆ / % key The instrument can calculate relative values or differences, and percentage values from the reference measurement values. 1 : Relative Calculation The display shows the “ ” symbol.
■ Display (LCD) Description Symbol and Unit － ⊿ R・H AUTO AUTO OFF RMS Filter Shift nF、μF mV, V μA, mA, A Ω, kΩ, MΩ ℃ Hz, kHz % mV (Sub-display) s (Sub-display) SENSOR lx (sub-display) (sub-display) (sub-display) OL 6 Description Appears when in DC-mode measurement Appears when in AC-mode measurement Appears when the polarity is negative Appears when in diode test Appears when in continuity check Relative calculation indicator Fixed ranges indicator AUTO range indicator DATA HOLD indicator AUTO HOLD ind
4.3 Measuring Instructions WARNING To avoid damage to instrument or equipment • Before starting measurement, make sure that the position of function switch and the input terminals for connecting the test leads are appropriate for the desired mode of measurement. • Temporarily remove the test leads from the device under test before operating the function switch. • Verify proper operation on a known source before use or taking action as a result of the indication of the instrument.
4.3.3 Measurements with SENSOR (SENSOR) 1) Turn the function switch to the “ mV ” position. 2) Get the instrument in the DC SENSOR mode with the SHIFT + SELECT Keys. Press of the SELECT Key again to use AC SENSOR. Input voltage will be displayed on the sub-display, and values and units set according to “input, display and unit settings of SENSOR mode” mentioned at clause 4.6 will be displayed on the main display. DC SENSOR Range AC SENSOR Range SENSOR 3) Connect the SENSOR to the input terminal.
4.3.5 Continuity Check ( ) CAUTION To avoid damage to instrument Turn off the power to the circuit under test before starting measurement in order to prevent any excessive voltage from being applied to the instrument. 1) Turn the function switch to the “ ” position. 2) Plug the test leads into the input terminals. 3) Connect the test leads to the circuit under test. If the circuit is continuous (no more than approximately 50Ω), the buzzer sounds. 4.3.
Connect the black test lead to the anode and the red test lead to the cathode. Normally, the display shows the “ OL ” symbol, indicating that the diode under test is normal. The diode is defective if the display gives a certain voltage level. Black test lead Red test lead Red test lead Black test lead Figure 2 Reverse-bias Diode Test Figure 1 Forward-bias Diode Test 4.3.
Note The default temperature read-out of the Digital Multimeters is in Celsius (°C). To change it to Fahrenheit (°F), it is necessary to proceed as follows: Changing the temperature unit setting to Fahrenheit Displaying “ ºC ” only is configured at factory before shipment. Carry out the following setting procedure to display “ ºF ”. While pressing the SELECT, RANGE and HOLD keys simultaneously, turn the function switch to the “ TEMP ” position.
4.3.9 Capacitor Measurement ( ) CAUTION To avoid damage to instrument • Turn off the power to the circuit under test before starting measurement in order to prevent any excessive voltage from being applied to the instrument. • Before starting measurement, be sure to discharge the capacitor under check. ”position. 1) Turn the function switch to the “ 2) Plug the test leads into the input terminals. 3) Open the test lead and press the REL key in 10nF range to adjust the capacitance to zero.
4.3.11 Function to change RMS detection to/from MEAN detection mode (KEW1052 only) The instrument has a function to change RMS detection to/from MEAN detection modes. 1) Select the appropriate AC Voltage measurement mode (ACV, ACmV) by using the function switch and the SELECT key. 2) Press the SHIFT key to display “Shift” on the display. 3) Then press the REL key to change to MEAN detection mode. “RMS” disappears on the display.
4.3.13 AUTO HOLD Function The instrument can automatically retain the measured value when the test leads are handled as described below. 1) Press the HOLD key to select Auto hold function. (The display shows the“ A•H ” symbol.) 2) Connect the test leads to the circuit under test. 3) When the reading stabilized, the buzzer sounds. 4) Remove the test leads from the circuit under test. 5) The display shows the measured value that is retained.
4.3.15 MIN/MAX/AVG Function (KEW1052 only) The minimum value (MIN), maximum value (MAX) and average value (AVG) during measurement are shown. (The range is fixed.) The average value is shown by dividing the integrated record data by the number of recording times. Pressing this key starts recording and at the same time the display shows “MIN”, “MAX” and “AVG” to release AUTO POWER OFF.
4.4 Memory Function (KEW1052 only) The instrument can save a data using with the following two types of modes. SAVE-mode: Saves a data for one measurement by manual operation. LOGGING-mode: Automatically saves a data from the start of logging. Memory capacity SAVE-mode: 100 data LOGGING-mode: Logging data of one time 1,600data Number of saved data Number of saved data is 4-digit numbers.
To save a Data (LOGGING-mode) 1) Press the MEMORY key. (The display shows the “ MEM ”symbol.) 2) Press the LOG (MIN/MAX) key. (The sub-display shows the logging interval (period).) Set the value with the (RANGE) key or (REL /%) key. The default setting is one second. (The default settings can be changed. Refer to the Set-up function.) The display shows “ FULL ” when the logging data is already saved. When saving the new data, perform delete of data. 3) Press the LOG (MIN/MAX) key to start logging.
• To overwrite selected data 1) Press the MEMORY key. (The display shows the “ MEM ”symbol.) 2) Press the SAVE (HOLD) key. (The sub-display shows the number of saved data.) 3) Use the (RANGE) key or (REL /%) key to select the number of saved data. 4) Press the SAVE (HOLD) key to save (over write) the data. 5) To cancel the function, hold down the MEMORY key for one second. (“MEM” symbol disappears.) Delete method (LOGGING-mode) • To delete all data 1) Press the MEMORY key.
Note Additional functions simply set when POWER ON can be used. 1) Turn the function switch to the OFF. 2) Turn the function switch to the desired position of any measurement mode (function). The AUTO POWER OFF function is enabled again. The display shows the “ AUTO OFF ” indication. 4.
1) Display “Ac” by using the LIGHT key or SHIFT key. ：RMS ：MEAN HOLD 2) Select the detection method by using the ▲ (RANGE) key or ▼ (REL) key. 3) Press the HOLD key to save the setting. 4) “SEt” appears and then “Ac.” (KEW1052 only) Set a default value of the saving interval during LOGGING mode. 1) Display “L.Int” by using the LIGHT key or SHIFT key. The default setting is 1 sec. HOLD 2) Select the saving interval by using the ▲ (RANGE) key or ▼ (REL) key.
Settings of input voltage in the SENSOR mode at the mV function, main display and the unit for input voltage can be made. 1) Display as follows by using the LIGHT key or SHIFT key. Then parameters can be changed will blink. Sub-display (Input voltage) ・numbers can be changed ・place of decimal point/ unit are fixed Main display ・number, place of decimal point/ unit can be changed. Press the LIGHT key to change displays in following sequence.
4.7 Additional functions simply set when POWER ON CAUTION To avoid damage to instrument When the measurement function is completed, turn the function switch back to the OFF position to turn off. With pressing the following keys, turn the function switch to the desired position of any measurement mode (POWER ON-state). This enables the following functions corresponding to the press keys.
5. User Calibration Function It is recommended that the instrument be calibrated periodically. The instrument can be calibrated. CAUTION To avoid electrical shock • Only authorized engineers are allowed to calibrate the instrument using dedicated facilities. • Connect the calibrator to the instrument with the calibrator’s test leads. • Before carrying out calibration, read the instruction manual of the calibrator.
Carry out calibration of ranges in accordance with Table 1. 1) Turn the function switch from the OFF position to the mV position while pressing the SELECT and RANGE keys at the same time. The display shows the “ CAL ” symbol then the “ PASS ” symbol. 2) Press the SELECT key. (The display shows the “ - ” symbol.) 3) Press the HOLD key twice. (The display shows the “ - - - ” symbol.) 4) Press the RANGE key. (The display shows the “ mV ” symbol.) 5) Connect the instrument to the calibrator with the test leads.
6. Battery and Fuse Replacement WARNING Be careful not to burn yourself. • Fuse becomes a high temperature after current measurement, it is dangerous by touching it directly. When fuse or batteries are replaced after current measurement, please be sure to leave the main unit for 10 minutes for cooling. 6.1 Battery Replacement If the batteries fall below the normal operating voltage, the “ Follow the steps below to replace the batteries with new ones. (AA-size (R6/LR6) 1.5V batteries) ”symbol turns on.
6.2 Fuse Replacement If a current greater than the rated value flows when the instrument is in the currentmeasurement range, a protection fuse may blow. If this happens, replace that fuse. The instrument contains the following types of fuses. WARNING • Be sure to disconnect the instrument from the circuit under test and test leads before replacing the fuses. • Turn the function switch to OFF (turn off the power) . • Do not operate the instrument with the casing left open.
7. Calibration and Maintenance Calibration Cycle It is recommended that the instrument be calibrated once every year. (SEE ALSO: User Calibration Function) Contacts of Services Please contact the sales representative from which you purchased the instrument. 8 Disposing the Product Waste Electrical and Electronic Equipment (WEEE), Directive 2002/96/EC This Product complies with the WEEE Directive (2002/96/EC) marking requirement.
DISTRIBUTOR Kyoritsu reserves the rights to change specifications or designs described in this manual without notice and without obligations.
