マニュアルレンジ機能 3.2 マニュアルレンジ機能 キーを押すとマニュアルレンジになります。キーを押 RANGE すごとにレンジアップし、小数点の位置が変わります。入力 信号の大きさがあらかじめわかっているときに使用します。 オートレンジにしたいときは、 キーを長押しします。 RANGE RANGE 5 V レンジ 51 V レンジ 1000 V レンジ 510 V レンジ • 導通チェックの初期設定はマニュアルレンジです。導通 チェック以外のファンクションでは、初期設定がオート レンジになります。 • nS 測定、ダイオードチェック、温度測定、DUTY 比測定 には、オートレンジはありません。...
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パワーオンオプション設定画面一覧 SHIFT+ 電源 ON HOLD HOLD パリティチェック ボーレート設定画面 データ長設定画面 設定画面 HOLD HOLD HOLD % 換算表示設定画面 データ出力設定画面 応答設定画面 HOLD HOLD HOLD 最小基準周波数 ブザー音設定画面 デシベル表示設定画面 設定画面 HOLD HOLD HOLD オートパワーセーブ リフレッシュホールド 温度表示設定画面 設定画面 設定画面 HOLD HOLD HOLD 表示バックライト リセット画面 基準インピーダンス 設定画面 設定画面 HOLD キーを押すと逆に進みます。...
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電池の交換 テストリードを本器から外し、ファンクションスイッチを OFF にします。 本器からホルスタを外します。 マイナスドライバなどで電池カバーのネジを OPEN の位置ま で回し、電池カバーを横にスライドさせ、次に上に持ち上げ て本器から外します。 ① ② 電池を電池スナップから外し、新しい電池と交換します。 電池の形名:6F22(マンガン)または 6LR61(アルカリ) 電池カバーをネジ留めし、ホルスタを装着します。 ケースを留めるときは電池スナップのケーブルを挟まないよ う注意してください。 電池カバーがうまくセットできない場合は、ネジが OPEN の 位置になっているか確認してください。...
Introduction Thank you for purchasing the HIOKI “Model 3802-50 DIGITAL HiTESTER.” To obtain maximum performance from the instrument, please read this manual first, and keep it handy for future reference. Verifying Package Contents • When you receive the instrument, inspect it carefully to ensure that no damage occurred during shipping.
Safety Information This instrument is designed to comply with IEC 61010 Safety Standards, and has been thoroughly tested for safety prior to shipment. However, mis- handling during use could result in injury or death, as well as damage to the instrument. Be certain that you understand the instructions and precautions in the manual before use.
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The following symbols in this manual indicate the relative importance of cautions and warnings. Indicates that incorrect operation presents an extreme hazard that could result in seri- ous injury or death to the user. Indicates that incorrect operation presents a significant hazard that could result in serious injury or death to the user.
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Measurement categories (Overvoltage categories) This instrument complies with CAT III (1000 V) and CAT IV (600 V) safety requirements. To ensure safe operation of measurement instruments IEC 61010 establishes safety standards for various elec- trical environments, categorized as CAT I to CAT IV, and called measurement categories.
Using the instrument in such conditions could cause an electric shock, so contact your dealer or Hioki rep- resentative for replacements. (Model 3851-10 TEST LEAD)
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Measurement Precautions Observe the following precautions to avoid electric shock. • Always verify the appropriate setting of the func- tion selector before connecting the test leads. • Disconnect the test leads from the measurement object and terminals before switching the function selector.
1.1 Product Overview Overview 1.1 Product Overview The 3802-50 is a multifunction, high-performance digital multimeter that can be used for voltage (DC/AC), current (DC/AC), resistance, continuity, diodes, electrostatic capacity, frequency, duty ratio, pulse width, and tempera- ture measurement. Furthermore, this instrument can be controlled by computer and transfer measurement data to the computer when the optional 3856-01/02 is used.
1.2 Features 1.2 Features High-performance Handheld DMM The 3802-50 can display a maximum count of 51,000. It can even measure distorted waveforms with high-preci- sion using true RMS measurement. The basic accuracy for DC voltage measurement is 0.03% rdg. 10 dgt.
1.3 Names and Functions of Parts 1.3 Names and Functions of Parts The name and function of each part of the 3802-50 is described below. Front Panel Display (10 page) Operation Keys (11 page) Function Selector (12 page) Terminals (13 page)
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1.3 Names and Functions of Parts Sub display and units Display Main display and units Bar graph Lights when under remote control. Remote Lights when the DCV measurement or DCA measurement func- tion is being used. Lights when the ACV measurement or ACA measurement func- tion is being used.
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1.3 Names and Functions of Parts Operation Keys SHIFT key SHIFT Locks the current measured value. (Hold function) HOLD Holding this key down toggles the recording function ON/OFF. Displays the relative value. (Relative value display function) Holding this key down toggles the peak hold function ON/OFF.
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1.3 Names and Functions of Parts Function Selector Pressing this key turns the instrument off. AC voltage measurement function Voltage measurement function Voltage measurement function up to 1000 mV. Use the key to select DC or AC. SHIFT Resistance measurement function Ω...
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1.3 Names and Functions of Parts Terminals Terminal used for current measurement. (A function) A Terminal Connect the read test lead. Terminal used for current measurement. (μA and mA μ function) A.mA Terminal Connect the read test lead. Common terminal used for all measurements. COM Terminal Connect the black test lead.
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Holder Stand Pass the strap provided through the hole in the holster to Strap secure the 3802-50 for portable use. The strap can be Attachment used to suspend the instrument from a belt or hook when Hole there is no place to set it down.
Measurement Observe the following precautions to avoid electric shock. • Always verify the appropriate setting of the func- tion selector before connecting the test leads. • Disconnect the test leads from the measurement object before switching the function selector. • The maximum input voltage is 1000 VDC, 1000 Vrms (sin) or 10 VHz.
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The terminals do not have sufficient spatial isola- tion. To avoid electrocution, do not touch the termi- nals. For safety reasons, when taking measurements, only use the test lead provided with the instrument. In order to protect the tips of the test leads, the test leads are capped when the unit is shipped from the factory.
Before using the instrument the first time, verify that it operates normally to ensure that the no damage occurred during storage or shipping. If you find any damage, con- tact your dealer or Hioki representative. Inspection • Is the battery indicator ( ) lit? →If it is lit, replace the battery.
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2.1 Pre-Operation Inspection Connect the red test lead to the V terminal, and the black test lead to the COM terminal. Black Short the tips of the red and black test leads by touching them together. • Buzzer sounds. • Value stabilizes around 0 Ω. →...
2.2 Voltage Measurement 2.2 Voltage Measurement • Note that the instrument may be damaged if voltage or current the measurement range. • When the power is turned off, do not apply voltage or current to the measurement terminal. Doing so may damage the instrument.
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2.2 Voltage Measurement <Example> Connect the test leads to the object ACV Measurement being tested. Black DCV Measurement Black <Example> Read the value displayed in the When measuring AC voltage main display. To display the frequency, press the or the key.
2.3 Current Measurement 2.3 Current Measurement Never apply voltage to the test leads. Doing so may damage the instrument and result in personal injury. To avoid electrical accidents, remove power from the circuit before measuring. When a test lead is connected to terminal A, an alarm sounds if the function switch is set to a func- tion other than mA or A.
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2.3 Current Measurement Set the function switch. mA.A mA.A: For measuring voltages above 5100 μA μA : For measuring voltages below 5100 μA μA If you are not sure of the voltage to be mea- sured, set the function switch to "mA.A". Use the key to select either DC SHIFT...
2.4 Resistance Measurement 2.4 Resistance Measurement Never apply voltage to the test leads. Doing so may damage the instrument and result in personal injury. To avoid electrical accidents, remove power from the circuit before measuring. Ω 2.4.1 Resistance Measurement ( Ω...
2.4 Resistance Measurement Ω 2.4.2 Conductance (1/ )Measurement (nS) The conductance measurement displays the reciprocal of the resistance. The display unit is "nS" (nanosiemens). For example, if the resistance is 40 MΩ, the conductance measurement will be 1/40 MΩ = 25 nS. (M is 10 , n is 10 If the resistance is infinity, 0 nS is displayed.
2.5 Continuity Check 2.5 Continuity Check Never apply voltage to the test leads. Doing so may damage the instrument and result in personal injury. To avoid electrical accidents, remove power from the circuit before measuring. Set the function switch. Select with the key.
2.6 Diode Check 2.6 Diode Check Never apply voltage to the test leads. Doing so may damage the instrument and result in personal injury. To avoid electrical accidents, remove power from the circuit before measuring. Set the function switch. Connect the test leads to the test ter- minals.
2.7 Capacitance Measurement 2.7 Capacitance Measurement Never apply voltage to the test leads. Doing so may damage the instrument and result in personal injury. To avoid electrical accidents, remove power from the circuit before measuring. Set the function switch. If you want to change the range, press the key.
2.8 Frequency Measurement 2.8 Frequency Measurement • Note that the instrument may be damaged if voltage or current the measurement range. • When the power is turned off, do not apply voltage or current to the measurement terminal. Doing so may damage the instrument.
2.9 DUTY Ratio Measurement 2.9 DUTY Ratio Measurement The duty ratio is the ratio between the pulse width and the pulse cycle. This instrument displays this ratio in terms of 100 (%). Plus slope pulse Minus slope pulse width width Pulse cycle (=tw + tw Plus slope...
2.10 Pulse Width Measurement 2.10 Pulse Width Measurement Set the function switch. See Section 2.2 Voltage Measurement (page 19) See Section 2.3 Current Measurement (page Use the key to select either DC SHIFT or AC. SHIFT Use the key to select the Pulse width.
2.11 Temperature Measurement 2.11 Temperature Measurement Never apply voltage to the test leads. Doing so may damage the instrument and result in personal injury. To avoid electrical accidents, remove power from the circuit before measuring. • The sensor used in the temperature probe is a thin, precision platinum film.
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2.11 Temperature Measurement TEMP Set the function switch. Use the key to select the tem- SHIFT perature display. ° SHIFT : Uses reference contact temperature compensation according to the instru- <Example> K is selected ment's internal temperature sensor : No reference contact temperature °...
3.1 Auto Range Function Additional Functions 3.1 Auto Range Function The auto range function automatically selects the optimal range for measurement. Use this function when you do not know the strength of the input signal or if you wish to avoid having to set the range manually.
3.2 Manual Range Function 3.2 Manual Range Function Press the key to set the manual range function. RANGE Each time the key is pressed the range increases, and the position of the decimal point changes. Use this func- tion when you know the strength of the input signal. To change to auto range, hold down the key.
3.3 Hold Functions 3.3 Hold Functions 3.3.1 Trigger Hold Function The trigger hold function locks the value that was being measured at the moment that the key was pressed. HOLD Turn the refresh hold function off. See Section 4.7 Refresh Hold Setting (page 58) Press the key during measurement to lock the HOLD...
3.3 Hold Functions 3.3.2 Refresh Hold Function The refresh hold function locks the display value auto- matically once the measurement value stabilizes. As the display value remains locked even if you remove the test leads from the test subject, this function is useful when you are measuring in locations where it is difficult to see the display value or when you are using both hands to take measurements.
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3.3 Hold Functions If the display value does not exceed the threshold value that was set, the display value is not locked in. If you have trouble getting the display value to lock, try changing the threshold value. * The threshold value of each function is shown below. Function Threshold value 0.05 V...
3.3 Hold Functions 3.3.3 Peak Hold Function This function locks in the maximum and minimum change in the measured value of an input signal over a period of 1ms (one-shot) or 250 μþs (repetitive). Input signal maximum value : HOLD Input signal minimum value : HOLD To turn on the PEAK HOLD function, hold down the...
3.4 Recording Function • The range is locked in the peak hold function. Press key to select the range. Changing the RANGE range restarts the function. • The sub display shows the time from the start of the peak hold function until the maximum (minimum) value was updated.
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3.4 Recording Function Press the key again to toggle between the maxi- HOLD mum value, minimum value, average value, current value and the main display. HOLD MAX MIN AVG When the maximum value (or minimum value) is updated, the buzzer sounds. To clear the maximum value, minimum value average value and time and restart, press the key.
3.5 Relative (REL) Display Function 3.5 Relative (REL) Display Function Pressing the key causes future values to be dis- played relative to the currently displayed value, which becomes the reference value. To reproduce a zero adjust function while measuring volt- age (mV), resistance, etc., short the test leads to set the relative value display mode.
3.6 Battery Indicator Function 3.6 Battery Indicator Function Holding down the key causes the current battery level to be displayed. The original display returns automati- cally after three seconds. Hold down The bar graph displays a reading from 0 to 100% for the battery voltage over a range from 6.0 to 10.0 V.
Model 3856-01 or Model 3856-02 Instruction Manual Install the software in the personal computer. Model 3856-01 or Model 3856-02 Instruction Manual Set up the personal computer and the 3802-50 for communications. See Section 4.1 Communications Settings (page 49) When the software of the communications package is used, set up the instrument as follows.
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3.7 Communications Function Connect the optical connector of the communications cable to the connector on the holster for the 3802-50. Make sure "RS-232C INTERFACE" is facing upwards Communication is not possible if "RS-232C INTERFACE" is facing downwards. Connect the other end of the communications cable to the personal computer.
3.8 Warning Functions 3.8 Warning Functions 3.8.1 Terminal A Misconnection Warning When a test lead is connected to terminal A, an alarm sounds if the function switch is set to a func- tion other than mA or A. For safety, if the alarm sounds, immediately remove the test lead from the object being tested.
3.8 Warning Functions 3.8.2 Overload Warning During voltage measurement, if the input voltage exceeds 1010.0 V, the 3802-50 sounds an intermittent beep as a warning. Remove the test leads from the test subject immediately. If full scale is exceeded in any of the ranges, "OL" is displayed.
Power On Options The Power On Option Setting screen is used to set the following items. Power On Option Description Ref Page Sets the communications speed. Baud Rate (49 page) (communications setting) Sets parity checking. Parity Check (49 page) (communications setting) Sets the data length.
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Power On Option Setting Screen List +Power On SHIFT HOLD HOLD Baud Rate Data Length Parity Check setting screen setting screen setting screen HOLD HOLD HOLD Percentage Display Data Output Response setting setting screen setting screen screen HOLD HOLD HOLD Minimum Frequency Decibel Display Buzzer Sound...
4.1 Communications Settings 4.1 Communications Settings 4.1.1 Communications Speed Setting (Baud Rate) SHIFT + 1. In order to display the Baud Rate Power On setting screen, hold down the key while turning the func- SHIFT tion switch. 2. Press the key or the RANGE DUAL...
4.1 Communications Settings 4.1.3 Data Length Setting 1. In order to display the Power On SHIFT + (twice) Power On Option setting screen, hold down key while turning the SHIFT function switch. 2. Press the key twice to dis- HOLD play the Data Length setting screen.
4.1 Communications Settings 4.1.5 Data Output ON/OFF Setting If data output is on, this instrument only outputs data after each sample. It does not receive commands. 1. In order to display the Power On SHIFT + (4 times) Power On Option setting screen, hold down key while turning the SHIFT...
4.2 Toggling the Percentage Display (4 - 20mA/0 - 20mA) 4.2 Toggling the Percentage Display (4 - 20mA/0 - 20mA) When measuring with the DCmA function, press the key three times to display the percentage display in DUAL the sub display. This procedure sets the percentage display method.
4.3 Minimum Frequency Setting 4.3 Minimum Frequency Setting Sets the minimum frequency for frequency measurement. The setting of the minimum frequency determines the sampling time (gate time) used in low frequency mea- surement. <Example> → Minimum frequency 0.5 Hz Sampling time 2 s 1.
4.4 Buzzer Sound setting 4.4 Buzzer Sound setting The buzzer sound can be set as preferred. 1. In order to display the Power On SHIFT + (7 times) Power On Option setting screen, hold down key while turning the SHIFT function switch.
4.5 Toggling the Decibel Display (dBm/ dBV) 4.5 Toggling the Decibel Display (dBm/ dBV) While measuring voltage, pressing the key twice DUAL displays the measured value converted into decibels in the sub display. The procedure for setting this display method is described below. During voltage measurement, converts into decibels the ratio of power versus power of 1 mW for the refer- ence resistance.
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4.5 Toggling the Decibel Display (dBm/ dBV) <Display example> 600 Ω (Measured value [V]) X 1000 [dBm] dBm = 10log Reference resistance [Ω] Select through power on option dBV = 20log (Measured value[V]) [dBV] Setting Method of reference resistance: See Section 4.10 Reference Impedance Setting (page 61)
4.6 Temperature Display Setting 4.6 Temperature Display Setting Set whether to display the ambient temperature or not in the sub display. (The ambient temperature is measured by a temperature sensor in the instrument.) 1. In order to display the Power On SHIFT + (6 times) Power On...
4.7 Refresh Hold Setting 4.7 Refresh Hold Setting This procedure sets the threshold value for the refresh hold function. The threshold value locks the display to showing the amount of change after the display value has stabilized, using the set amount of change as a criteria. Setting this to off disables the refresh hold function and enables the trigger hold function.
RANGE DUAL switch to a position other than pulse output and then back to its original position. The 3802-50 reverts to the power ON state. • The auto power save function is automatically dis- abled when either the peak hold function or the recording function is used.
4.9 Display Backlight Setting 4.9 Display Backlight Setting This procedure sets the time until the display backlight turns off. To turn on the display backlight, press the key. To turn off the display backlight before the time elapses, press the key again.
4.10 Reference Impedance Setting 4.10 Reference Impedance Setting This procedure sets the reference impedance for the decibel (dBm) conversion screen. 1. In order to display the Power On SHIFT + (twice) Power On Option setting screen, hold down key while turning the SHIFT function switch.
4.11 Reset 4.11 Reset This procedure resets the power on option settings to their initial values. 1. In order to display the Power On SHIFT + (once) Power On Option setting screen, hold down key while turning the SHIFT function switch. 2.
5.1 General Specifications Specifications 5.1 General Specifications AC measurement True RMS measurement method Measurement • DC voltage measurement functions • AC voltage measurement • DC current measurement • AC current measurement • Resistance measurement • Continuity check • Diode check •...
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5.1 General Specifications Display • Data display Main display: 4 1/2 digits Sub display: 4 1/2 digits Maximum display count [51000] Maximum display count [15000] 1000 V range/ 1000 mV range Maximum display count [99999] Hz function Maximum display count [9999] C function Polarity display [-] mark lights automatically.
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5.1 General Specifications Storage C to 60 C (-4 F to 140 F), 80%RH or less (no ° ° ° ° temperature and condensation) humidity Warranty period Three years (excludes measurement accuracy) Accessories 3851-10 TEST LEAD Strap Protective holster Instruction manual (built into instrument) 6LR61 alkaline battery Replacement parts μA.mA terminal: 440 mA fuse (1000 V AC/DC Cutoff...
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5.1 General Specifications Noise resistance DCV: 60 dB or more (50 Hz/ 60 Hz) NMRR ACV: 60 dB or more (DC) Noise resistance DCV: 90 dB or more CMRR (DC/ 50 Hz/ 60 Hz, 1 kΩ unbalance) ACV: 60 dB or more (DC/ 50 Hz/ 60 Hz, 1 kΩ...
5.2 Accuracy 5.2 Accuracy (Guaranteed at 23°C ± 5°C / 73°F ± 9°F, 80%RH or less) DC mV/ V (DCV measurement) Range Accuracy Input Impedance Overload Protection 51.000 mV ± 0.05%rdg. ± 50 dgt. 1000 V DC/ 1000 Vrms (sin) or 510.00 mV VHz, transient 1 GΩ...
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5.2 Accuracy dB (Decibel display) Reference Range Reference Conversion Formula Accuracy Resistance 10 log X (1000/ refer- Add 0.3 dB 1-9999 Ω 510.00 dBm 1 mW ence resistance)] to voltage measure- ment accu- 510.00 dBV 20 log racy Bandwidth conforms with voltage measurement * Initial reference resistance: 600 Ω...
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5.2 Accuracy AC μA/ mA/ A (ACA measurement) Accuracy Input Im- Overload pedance Range Current (Shunt re- 30-45Hz 45-2kHz 2k-20kHz sistance) ± 1.5%rdg. ± 3%rdg. 510.00 μA 0.06 V ± 50 dgt. ± 80 dgt. ± 0.8%rdg. 100 Ω ± 20 dgt. ±...
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5.2 Accuracy Ω (Resistance measurement)/ Contact Check Measured Open Terminal Overload Range Accuracy Current Voltage Protection Approx. 510.00 Ω ±0.08%rdg.±10 dgt. 1.00 mA Approx. 5.1000 kΩ ± 0.08%rdg. ± 5 dgt. 1000 V DC/ 0.38 mA 1000 Vrms Approx. (sin) or 51.000 kΩ...
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5.2 Accuracy Hz (Voltage/ Current Measurement) Measured Range Accuracy Overload Protection Current 99.999 Hz 999.99 Hz 1000 V DC/ 1000 ± 0.02%rdg.+ 3 dgt. 0.5 Hz, 1 Hz, Vrms (sin) or 9.9999 kHz 600 kHz or less 2 Hz, 5 Hz VHz, for 1 minute 99.999 kHz 999.99 kHz...
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5.2 Accuracy Minimum Sensitivity Current (Hz/ DUTY ratio/ Pulse width Measurement) Sin Wave Accuracy Specification Range 20Hz to 20kHz Maximum Current 510.00 μA 100 μA 5100.0 μA 250 μA 510 mA 51.000 mA 10 mA 510.00 mA 25 mA 5.1000 A 10 A 10.000 A 2.5 A...
We cannot accept responsibility for damage incurred during ship- ping. • Never modify the instrument. Only Hioki service engi- neers should disassemble or repair the instrument. Failure to observe these precautions may result in fire, electric shock, or injury.
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→ Check whether the wrong voltage is being input to the mA.mA terminal. Is there a problem with the communication settings of the 3802-50 and the computer? → Power on option Communication not possible Are the baud rate and parity check set correctly (49...
6.2 Cleaning 6.2 Cleaning To clean the instrument, wipe it gently with a soft cloth moistened with water or mild detergent. Never use sol- vents such as benzene, alcohol, acetone, ether, ketones, thinners or gasoline, as they can deform and discolor the case.
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6.3 Replacing the Battery Disconnect the test leads from the unit and set the function switch to OFF. Detach the holster from the unit. Using a Philips screwdriver, turn the battery cover screw to the OPEN position, slide the battery cover to the side, then lift the battery cover and remove it from the unit.
6.4 Replacing the Fuses 6.4 Replacing the Fuses • To avoid electric shock, turn off the power and dis- connect the test leads before replacing the fuses. After replacing the fuses, replace the cover and screws before using the instrument. •...
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6.4 Replacing the Fuses Disconnect the battery from the snap-on battery connec- tor. Remove the three screws, and then remove the lower case. Pull the circuit board out of the upper case. Remove the blown fuse, and replace it with a new fuse of the specified type.
6.5 Checking the Instrument Software Version 6.5 Checking the Instrument Software Version You can use the following procedure to check the version number of the instrument software. Turn on the power while holding down the key. Release the key while the buzzer is sounding. The version number appears on the main screen.
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6.5 Checking the Instrument Software Version...