Prokit's Industries 303-150NCS User Manual

Download

Page 1

OPERATOR’S

INSTRUCTION MANUAL

903-150NAS 903-150NBS 303-150NCS 903-150NDS

For 303-150NCS

DIGITAL MULTIMETER

Page 2

SAFETY INFORMATION

This multimeter has been designed according to IEC 1010 concerning electronic measuring instruments with an overvoltage category (CAT II) and pollution 2. Follow all safety and operating instructions to ensure that the meter is used safely and is kept in good operating condition. Full compliance with safety standards can be guaranteed only with test leads supplied. If necessary, they

must be replaced with the type specied in this manual.

SAFETY SYMBOLS

Important safety information, refer to the operating manual.

Dangerous voltage may be present.

Earth ground.

Double insulation (Protection class II).

Fuse must be replaced with rating specied in the manual.

200mA/250V

MAINTENANCE

• Before opening the case, always disconnect test leads from all energized circuits.

• For continue protection against re; replace fuse only with the specied voltage and current ratings: F 200mA/250V(Quick

Acting)

• Never use the meter unless the back cover is in place and fastened completely.

• Do not use abrasives or solvents on the meter. To clean it using a damp cloth and mild detergent only.

Page 3

DURING USE

• Never exceed the protection limit values indicated in specications for each range of measurement.

• When the meter is linked to measurement circuit, do not touch unused terminals.

• Never use the meter to measure voltages that might exceed

600V above earth ground in category II installations.

• When the value scale to be measured is unknown beforehand, set the range selector at the highest position.

• Before rotating the range selector to change functions, disconnect test leads from the circuit under test.

• When carrying out measurements on TV or switching power

circuits always remember that there may be high amplitude voltages pulses at test points, which can damage the meter.

• Always is careful when working with voltages above 60V dc or 30V ac rms. Keep ngers behind the probe barriers while

measuring.

• Before attempting to insert transistors for testing, always be sure that test leads have been disconnected from any measurement circuits.

• Components should not be connected to the hFE socket when making voltage measurements with test leads.

• Never perform resistance measurements on live circuits.

GENERAL DESCRIPTION

The meter is a handheld 3 1/2 digital multimeter for measuring DC

and AC voltage, DC current, Resistance, Diode, Transistor and Continuity Test with battery operated.

The Back light of display is optional.

Page 4

Function 903-150NAS 903-150NBS 303-150NCS 903-150NDS

AC Voltage V~ • • • • DC Voltage V • • • •

DC Current A • • • • Resistance Ω • • • • Diode • • • • Transistor hFE test • • • • Continuity • • • Temperature ºC • HOLD • • • • BACK LIGHT •

Page 5

FRONT PANEL DESCRIPTION

Display

3 1/2 digit, 7 segment, 15mm high LCD.

Back light (option)

When this button is pushed, the Back light of display is on. After

about 5 seconds, the Back light is self-off. The Back light is on

again, just push this button once.

Rotary switch This switch is used to select functions and desired ranges as

well as to turn on/off the meter.

Hold button When this button is pushed, the display will keep the last reading and " " symbol will appear on the LCD until pushing it again.

10A" jack Plug in connector for red test lead for 10A measurement. "

COM" jack Plug in connector for black (negative) test lead. "VΩmA" jack

6 7

Plug in connector for red (positive) test lead for voltage, resistance and current (except 10A) measurements.

SPECIFICATIONS

Accuracy is specied for a period of one year after calibration and

at 18 to 28°C(64°F to 82°F) with relative humidity to 80%.

GENERAL

Maximum voltage between

terminals and earth ground : CAT II 600V Fuse protection : F 200mA/250V Power : 9V battery, NEDA 1604 or 6F22 Display : LCD, 1999 counts, updates 2-3/sec. Measuring method : Dual-slope integration A/D converter Overrange Indication : Only gure "1" on the display Polarity indication : "-" displayed for negative polarity Operating Environment : 0 to 40ºC Storage temperature : -10ºC to 50ºC. Low battery indication : " " appears on the display Size : 138mm×69mm×31mm Weight : Approx.170g.

Page 6

DC VOLTAGE

Range Resolution Accuracy

200mV 100µV ±0.5% of rdg ± 2 digits

2V 1mV ±0.5% of rdg ± 2 digits

20V 10mV ±0.5% of rdg ± 2 digits 200V 100mV ±0.5% of rdg ± 2 digits 600V 1V ±0.8% of rdg ± 2 digits

Overload Protection: 250V rms. For 200mV range and 600V dc

or rms. ac for other ranges.

DC CURRENT

Range Resolution Accuracy 200µA 0.1µA ±1% of rdg ± 2 digits

2mA 1µA ±1% of rdg ± 2 digits 20mA 10µA ±1% of rdg ± 2 digits

200mA 100µA ±1.5% of rdg ± 2 digits

10A 10mA ±3% of rdg ± 2 digits

Overload Protection: F 200mA/250V fuse. (10A range unfused) *303-150NCS DC 200µA Excepted

AC VOLTAGE

Range Resolution Accuracy

200V 100mV ±1.2% of rdg ± 10 digits

2600V 1V ±1.2% of rdg ± 10 digits

Overload Protection: 600V dc or rms. ac for all ranges. Frequency range: 40Hz to 400Hz. Response: Average respond-

ing, calibrated in rms. of a sine wave.

DIODE & CONTINUITY(*903-150NAS Excepted)

Range Description

If continuity exists (about less than 1.5kΩ), built-in buzzer

will sound.

Show the approx. forward voltage drop of the diode.

Page 7

Overload Protection: 250V dc or rms. ac.

RESISTANCE

Range Resolution Accuracy

200Ω 0.1Ω ±0.8% of rdg ± 3 digits

2kΩ 1Ω ±0.8% of rdg ± 2 digits 20kΩ 10Ω ±0.8% of rdg ± 2 digits

200kΩ 100Ω ±0.8% of rdg ± 2 digits

2MΩ 1kΩ ±1.0% of rdg ± 2 digits

Maximum Open Circuit Voltage: 3.2V Overload Protection: 250V dc or rms. ac for all ranges.

TRANSISTOR hFE TEST (0-1000)

Range Test Range Test Current Test Voltage

NPN & PNP 0-1000 Ib=10µA Vce=3V

TEMPERATURE (For 303-150NCS only)

Range Resolution Test Range Accuracy

ºC 1ºC

-20ºC to 0ºC

-0ºC to 400ºC

400ºC to 1000ºC

±1.0% of rdg ± 2 digits ±1.0% of rdg ± 3 digits

±2.0% of rdg

TEMPERATURE (For 303-150NCS only)

Range Resolution Test Range Accuracy

ºF 1ºF

-4ºF to 32ºF

32ºF to 752ºF

752ºF to 1832ºF

±10% of rdg ± 2 digits

±1.0% of rdg ± 3 digits

±2.0% of rdg

OPERATING INSTRUCTIONS DC VOLTAGE MEASUREMENT

1. Connect the red test lead to the "V.Ω.mA" jack and the black

lead to the "COM" jack.

2. Set rotary switch at desired DCV position. If the voltage to be

measured is not known beforehand, set range switch at the highest range position and then reduce it until satisfactory resolution is obtained.

3. Connect test leads across the source or load being measured.

4. Read voltage value on the LCD display along with the polarity of the red lead connection.

Page 8

DC CURRENT MEASUREMENT

1. Connect the red test lead to the "V.Ω.mA" jack and the black

test lead to "COM" jack. (For measurements between 200mA and 10A, remove red lead to "10A" jack.)

2. Set the rotary switch at desired DCA position.

3. Open the circuit in which the current is to be measured, and connect test leads in series with the circuit.

4. Read current value on LCD display along with the polarity of red lead connection.

AC VOLTAGE MEASUREMENT

1. Connect the red test lead to "V.Ω. mA" jack and the black test

lead to the "COM" jack.

2. Set the rotary switch at desired ACV position.

3. Connect test leads across the source or load being measured.

4. Read voltage value on the LCD display.

RESISTANCE MEASUREMENT

1. Connect the red test lead to "V. Ω. mA" jack and black test lead

to the "COM" jack. (The polarity of red lead is positive "+".)

2. Set the rotary switch at desired "Ω" range position.

3. Connect test leads across the resistor to be measured and read LCD display.

4. If the resistance being measured is connected to a circuit turn off power and discharge all capacitors before applying test probes.

DIODE TEST

1. Connect the red test lead to "V.Ω.mA" jack and the black test

lead to the "COM" jack (The polarity of red lead is positive "+".).

2. Set the rotary switch at " " position.

3. Connect the red test lead to the anode of the diode to be tested and the black test lead to the cathode of the diode. The approx. forward voltage drop of the diode will be displayed. If the con-

nection is reversed, only gure "1" will be shown.

Page 9

TRANSISTOR TEST

1. Set the rotary switch at "hFE" position.

2. Determine whether the transistor under testing is NPN or PNP and locate the emitter base and collector leads. Insert the leads into proper holes of the hFE socket on the front panel.

3. Read the approximate hFE value at the test condition of base

current 10µA and Vce 3V.

NOTE:

To avoid electrical shock, remove test leads from measurement circuits before testing a transistor.

AUDIBLE CONTINUITY TEST

1. Connect red test lead to "V.Ω.mA", black test lead to “COM”.

2. Set range switch to " " position.

3. Connect test leads to two points of circuit to be tested. If continuity exists, built-in buzzer will sound.

MEASURING TEMPERATURE

1. If the meter is the ºC function, set the rotary switch at ºC. Position. If it is the ºF function, set the rotary switch at ºF Position. The LCD display will show the current environment temperature.

2. Connect the red lead of "K" type thermocouple into the "V.Ω.mA" jack and the black lead of "K" type thermocouple into

the "COM" jack.

3. Read temperature value on the LCD display.

WARNING

To avoid electric shock, be sure the thermocouple has been removed before changing to another function measurement.

Page 10

BATTERY & FUSE REPLACEMENT

If " " appears on display, it indicates that the battery should be replaced. Fuse rarely need replacement and blow almost always as a result of operator’s error.

To replace battery & fuse (200mA/250V) remove the 2 screws in the bottom of the case. Simply remove the old, and replace

with a new one. Be careful to observe battery polarity.

WARNING

Before attempting to open the case, always be sure that test leads have been disconnected from measurement circuits. Close case and tighten screws completely before using the meter to avoid electrical shock hazard.

ACCESSORIES

• Operator’s instruction manual

• Set of test leads

• Gift box

• 9 volt battery. NEDA 1604 6F22 006P type

• "K" type thermocouple(For 303-150NCS only)

• Holster (option)

Page 11

簡介

本系列儀錶是一種性能穩定、高可靠性和防跌落性能的小型掌上型3 1/2位元數位多用錶。儀錶採用字高15mm的液晶顯示器，讀數清晰。整機電路設計以大型積體電路雙積分A/D轉換器為核心，並配以超載保護電路，使之成為一台性能優越小巧的工具儀錶。

此系列儀錶可用來測量直流和交流電壓、直流電流、電阻、二極體、電晶體、溫度和電路通斷測試。

本系列各型號的測量功能：

功能

交流電壓測量 V~ • • • •

直流電壓測量 V • • • •

直流電流測量 A • • • •

電阻測量 Ω • • • •

二極體測試

電晶體測試 hFE • • • •

通斷測試

溫度測試 ºC •

資料保持 HOLD • • • •

背光 BACK LIGHT •

1. 3 1/2位、字高15mm 7段LCD顯示器

2. 背光 BACK LIGHT

按下BACK LIGHT鍵，背光點亮，約5秒後自動熄滅。再要點亮，需再按一次。

3. 功能量程開關

用於選擇各功能和量程

4. 資料保持開關HOLD

在測量中按HOLD鍵，儀錶顯示器上將保持測量的最後讀數並且 LCD上顯示量狀態

5. 10A插孔

6. COM插孔

903-150NAS 903-150NBS 303-150NCS 903-150NDS

• • • •

• • •

" "

符號；釋放資料保持開關，儀錶即恢復正常測

Page 12

7. VΩmA插孔

安全資訊

903-150NAS、903-150NBS、303-150NCS和903-150NDS數位多用錶是根據IEC1010 600V(CAT II)和污染等級2設計的。為保證儀錶能準確安全使用，請認真閱讀使用說明書。

安全標誌

重要的安全資訊，應參閱說明書

高壓危險

地

雙重絕緣（II類安全設備）

200mA/250V

保險絲必須按說明書指定的規格更換

使用注意事項

•

儀錶只能和所配備的測試錶棒一起使用才符合安全標準的要求。如測試錶棒破損需要更換，必須換上同型號或相同電氣規格的測試錶棒。

•切勿超過每個量程所規定的輸入極限值。

•當儀錶正在測量時，不要觸及沒有使用的輸入端。

•在不能確定被測量的大小範圍時，將功能量程開關置於最大量程位

置。

•在功能量程開關轉換之前，應使測試錶棒與被測電路處於開路狀態。

•進行線上電阻測量前，應關斷電路中所有電源並將所有電容器放電。

•測量高於60V直流30V交流以上的電壓時，務必小心，切記手指不要

超過測試錶棒擋手部份。

•測量電視機或開關電源時，應注意電路中可能存在會損壞儀表的脈

衝。

•在測試電晶體前，必須確保測試錶棒沒有連接到任何被測試電路。

Page 13

•在測試錶棒測量電壓前，必須確保電子元件連接在電晶體測試座上。

維護

•在打開後蓋之前，測試錶棒應斷開測量電路。

•為保護儀錶的內部線路，更換保險絲必須使用相同的規格，本系

列儀表使用的保險絲規格為：F 200mA/250V（快速）。

•在後蓋未蓋妥，螺絲未擰緊前，切勿使用儀錶。

•清潔儀錶只能使用溼布和少量清滌劑，切忌用化學溶劑擦表殼。

•如觀察到有任何異常，該儀錶應立即停止使用並送維修。

技術指標

準確度：±%讀數字數，保證期1年。環境溫度：18°C 至28°C 。環境溼度：80%。

一般特性：

電壓輸入端和地之間最大電壓：CAT II 600V 保險管：F 200mA/250V 電源：9V 電池，NEDA 1604 或 6F22 最大顯示值：1999 過量程指示："1" 極性顯示：負極性顯示"-" 工作溫度：0 到 40ºC 儲存溫度：10ºC 到 50ºC 低電壓指示：顯示器顯示" " 外型尺寸：138mm×69mm×31mm 重量：約170g

Page 14

直流電壓測量

量程分辨力準確度

200mV 100µV ±0.5% 讀數 ± 2 字

2V 1mV ±0.5% 讀數 ± 2 字

20V 10mV ±0.5% 讀數 ± 2 字 200V 100mV ±0.5% 讀數 ± 2 字 600V 1V ±0.8% 讀數 ± 2 字

超載保護：200mV量程250V dc或rms；其餘量程 600V dc或rms。

直流電流測量

量程分辨力準確度

200µA 0.1µA ±1% 讀數 ± 2 字

2mA 1µA ±1% 讀數 ± 2 字 20mA 10µA ±1% 讀數 ± 2 字

200mA 100µA ±1.5% 讀數 ± 2 字

10A 10mA ±3% 讀數 ± 2 字

超載保護：F 200mV/250V保險絲（10A量程無保險絲）。

303-150NCS無200µA 檔。

交流電壓測量

量程分辨力準確度

200V 100mV ±1.2% 讀數 ± 10 字 600V 1V ±1.2% 讀數 ± 10 字

超載保護：600V dc或rms。頻率範圍：40Hz到400Hz。顯示：平均值（正弦波有效值）。

Page 15

電阻

量程分辨力準確度

200Ω 0.1Ω ±0.8% 讀數 ± 3 字

2kΩ 1Ω ±0.8% 讀數 ± 2 字

20kΩ 10Ω ±0.8% 讀數 ± 2 字

200kΩ 100Ω ±0.8% 讀數 ± 2 字

2MΩ 1kΩ ±1.0% 讀數 ± 2 字

最大開路電壓：3.2V 超載保護：250V dc或rms

二極體和電路通斷測試（903-150NAS無此功能）

量程說明

導通電阻小於1.5kΩ，機內蜂鳴器響。

顯示近似二極體正向電壓值。

超載保護：250V dc或rms. ac

電晶體hFE測試(0-1000)

量程測試範圍測試電流測試電壓

NPN & PNP 0-1000 Ib=10µA Vce=3V

溫度測試（僅303-150NCS有此功能）

量程分辨力測量準確度

ºC 1ºC

-20ºC 到 0ºC

-0ºC 到 400ºC

400ºC 到 1000ºC

±1.0% 量程 ± 2 字 ±1.0% 量程 ± 3 字

±2.0% 量程

Page 16

使用方法

操作前注意事項：

1. 接通電源，先檢查9V電池，如果電池電壓不足，" " 將顯示在顯示器上，這時則需要更換電池。如果顯示器上沒有顯示"

"，則按以下步驟操作。

2. 測試錶棒插孔旁邊的 " " 符號，表示輸入電壓或電流不應超過指示值，這是為了保護內部線路免受損傷。

3. 測試之前，功能量程開關應置於您所需要的量程。

直流電壓測量

1. 將紅色錶棒插入 "VΩmA" 插孔，黑色錶棒插入 "COM" 插孔。

2. 將功能量程開關置於V 量程範圍，並將測試錶棒連接到待測試

電源或負載上，紅色錶棒所接端的極性將同時顯示於顯示器上。

注意

1. 如果被測量電壓範圍事先不知道，請將功能量程開關置於最大量程，然後逐漸降低直至取得滿意的分辨力。

2. 如果顯示器只顯示 "1" ，這表示已經過量程，功能量程開關應置於更高量程。

3. 不要輸入高於600V的電壓，顯示更高電壓是可能的，但有損壞儀錶內部線路的危險。

4. 在測量高壓電時，要特別注意避免觸電。

Page 17

直流電流測量

1. 將黑色錶棒插入COM插孔，當被測電流不超過200mA時，紅色色錶棒插入 "V. .mA" 插孔。如果被測電流在 200mA和10A之間，則將紅色錶棒插入10A插孔。

2. 將功能量程開關置於所需要的A 量程位置，並將測試錶棒串連接入到待測負載上，電流值顯示器紅色錶棒連接的極性。

1. 如果被測電流範圍事先不知道，請將功能量程開關置於最大量

注意

程，然後逐漸降低直至取得滿意的分辨力。

2. 如果顯示器只顯示 "1" ，這表示已經過量程，功能量程開關應置於更高量程。

3. 測試錶棒插孔旁邊的 " " 符號，表示最大輸入電流是 200mA或10A取決於所使用的插孔，過量的電流將燒壞保險絲。10A量程無保險絲保護。

交流電壓測量

1. 將紅色錶棒插入 "VΩmA" 插孔，黑色錶棒插入 "COM" 插孔。

2. 將功能量程開關置於V～量程範圍，並將測試錶棒連接到待測試

電源或負載上。

注意：參看直流電壓測量注意事項1、2 、3和4。

電阻測量

1. 將黑色錶棒插入COM插孔，紅色錶棒插入V/Ω/Hz插孔。

2. 將功能量程開關置於所需要的Ω量程位置，將錶棒並接到被測電

阻上，從顯示器上讀取測量結果。

Page 18

1. 如果被電阻值超過所選擇量程的最大值，將顯示過量程 "1" ，

此時應選擇更高的量程。在測量以上的電阻時，可能需要幾秒鐘後讀數才會穩定。這對於高阻值測量是正常的。

2. 當無輸入時，例如開路情況，儀錶顯示 "1" 。

3. 檢查線上電阻時，必須先將被測線路內所有電源關斷，並將所

有電容器充分放電。

二極體測試

注意

1. 將黑色錶棒插入COM插孔，紅色錶棒插入"V.Ω.mA"此時紅色錶棒極性為 "+" 。

2. 將功能量程開關置於量程位置，將紅色錶棒接到被測二極體的陽極，黑色錶棒接到二極體的陰性，由顯示器上讀取被測二極體的近似正向壓降值。

電路通斷測試

將黑色錶棒插入COM插孔，紅色錶棒插入"V.Ω.mA"。將功能量

程開關置於量程" "位置，將錶棒並接到被測電路的兩點。如果該兩點間的電阻低於約1.5KΩ，內置蜂鳴器會發出響聲指示該兩點間導通。

電晶體測試

1. 將功能量程開關置於hFE位置。

2. 判斷被測電晶體是PNP還是NPN型，將基極、發射極和集電極分

別插入儀錶面板上電晶體測試插座的相應孔內。

3. 由顯示器上讀取hFE的近似值。測試條件為：1b=10µA、 Vce=3V。

Page 19

溫度測試

將功能量程開關置於ºC位置，將熱電偶感測器的黑插頭插入

COM端，紅插頭插入"V. .mA" 。熱電偶的工作端（測溫端）置於待

測物上面或內部，可直接從顯示器上讀取溫度值，讀數為攝氏ºC。

功能量程開關置於ºC位置，熱電偶感測器開路時，儀錶顯示為室

溫。

更換電池和保險絲

1. 在正常情況下，一般不需要更換保險絲。更換保險絲及電源需要拔去錶棒和關斷電源後進行。旋出後蓋上的兩個螺絲即可打開表殼。

2. 本錶使用的保險絲規格為：200mA/250V快速熔斷型。更換保險絲必須使用相同的規格。

3. 本錶使用的電池為：9V NEDA 1604或6F22。更換電池需用同一型號電池。

4. 更換電池或保險絲後，必須上緊後蓋才能使用儀錶。

為避免電擊，在打開後蓋之前，應檢查確信測試錶棒已斷開

警告

測量電路。

在使用儀表之前，應檢查確信後蓋已上緊。

附件

•使用說明書一本

•測試棒一附

•包裝盒一個

•9V電池NEDA 1604 6F22 一個（已裝入錶內）

•"K" 型熱電偶感測器一個（僅303-150NCS）

•橡皮套（選購件）

Page 20

Prokit’s Industries Co., Ltd.

5F, No.7, Lane 130, Ming-Chung Rd., Hsin-Tien City, Taipei Hsien, Taiwan, R.O.C. Post code: 23114 Tel: 886-2-22183233 (Rep.) Fax: 886-2-22182722 E-mail:pk@mail.prokits.com.tw http://www.prokits.com.tw