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FUZRR FR2000+, Руководство пользователя

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FUZRR FR2000+ Скачать руководство пользователя страница 21

20

As the resistance value measured by the Meter is the value of the
series resistance from the testing line and two grounding
resistances.

R

T

=R

A

+ R

B

+ R

L

Where: R

T

is the resistance value measured with the Meter.

R

L

is the resistance value of the testing line.

Meter can measure out the resistance value by connecting the

test lines with both ends.

So, if the measurement value of the Meter is smaller than the

allowable value of the grounding resistance, then the two
grounding bodies are qualified for grounding resistance.

(2) Three-Point Method

As shown in the figure below, in the vicinity of the measured
grounding body R

A,

find two independent grounding bodies of

better grounding state R

B

and R

C.

First, link R

A

and R

B

with a test line; use the Meter to get the first

reading R

1

.

 

Содержание FR2000+

Страница 1: ...0 ...

Страница 2: ...hnical Specifications 6 Ⅵ Structure of Meter 8 Ⅶ LCD Display 8 Ⅷ Measuring Principle 10 Ⅸ Operation Method 10 1 Boot Up 10 2 Battery Voltage Check 11 3 Resistance Test 11 4 Clock Settings 13 5 Alarm Settings 113 6 Date Lock 14 7 Data Storage Review Delete 14 Ⅹ Battery Instructions 16 Ⅺ Field Application 16 Ⅻ Accessories 22 ...

Страница 3: ...designed produced and inspected according to IEC61010 safety specifications In any case the use of this instrument should pay special attention to safety When measuring high frequency signal generators such as mobile phones should not be used next to the meter to avoid errors Pay attention to the text and symbols on the body of the instrument Before use make sure that the instrument and accessorie...

Страница 4: ...replace the battery in time otherwise it will lead to ground error The jaw contact surfaces must be kept clean and cannot be wiped with corrosives and rough objects When opening the trigger avoid the impact of the clamp especially the jaw joint When the clamp meter measures the resistance the clamp head will make a slight noise which is normal Note the deep beep beep sound that distinguishes the a...

Страница 5: ... in the same screen and also has a real time clock data storage data access alarm automatic shutdown and other functions The machine is beautiful and upscale has a wide range high resolution convenient operation easy to carry accurate reliable stable performance strong anti interference ability Moreover it has a shockproof dustproof moisture proof structure and is a commonly used and indispensable...

Страница 6: ...ering technique to minimize interference At the same time data storage and data upload functions III Model differentiation Model Resistance Range Current Range FR2000 0 500Ω FR2000C 0 1200Ω 0 20A Ⅳ Range and Accuracy 1 Ranges and Accuracy of Measurement Mode Range Resolution Accuracy Resistance 0 010Ω 0 099Ω 0 001Ω 1 0 01Ω 0 10Ω 0 99Ω 0 01Ω 1 0 01Ω 1 0Ω 49 9Ω 0 1Ω 1 0 1Ω 50 0Ω 99 5Ω 0 5Ω 1 5 0 5Ω ...

Страница 7: ... Power Supply DC 6V 4 AA alkaline dry batteries Range FR2000 Resistance 0 01 500Ω FR2000C Resistance 0 01 1200Ω FR2000C current 0 00mA 20 0A Measure Method Mutual induction Resistance Resolution 0 001Ω Jaw Size 55mm 32mm Clock Function Have Display Mode 4 digit LCD display black screen design LCD Size 46mm 29mm Meter Size L W H 285mm 85mm 58mm Measure Time 2times second Data Storage 300 groups MEM...

Страница 8: ...when battery voltage is low Automatic shut down Turn off after 5 minutes Power Consumption 50mA Max Weight Meter 1180g including battery Working Temperature and Humidity 10 40 below 80 rh Storage Temperature and Humidity 20 60 below 70 rh Insulation Resistance Above 20MΩ 500V between circuit and case Pressure resistance AC 3700V rms between circuit and case External Magnetic Field 40A m External E...

Страница 9: ...8 Ⅵ Structure of Meter 1 Clamp Jaw 2 Trigger 3 LCD 4 POWER Key 5 MODE Key 6 AL Alarm Function Key 7 MEM Key 8 SET Key 9 HOLD Key 10 CALIBRATION LOOP 1Ω 11 CALIBRATION LOOP 10Ω VII LCD Display ...

Страница 10: ...mbol of data memory 7 Noise signal 8 Data lock symbol 9 Symbol of battery 10 Resistance unit 11 4 digital LCD figures display 12 Current unit 13 2 Digital No Of Data Storage Unit 14 4 digital LCD current and clock display Description of Special Symbols Symbol of an open jaw As a jaw is in the open state ...

Страница 11: ...l indicates that the measured resistance has exceeded the lower limit of the Meter OL A symbol indicates that the measured current has exceeded the upper limit of the Meter Alarm symbol when the measured value is greater than the critical value of alarm setting the symbol flashes and the meter issued by intermittent beep beep beep sound MEM Symbol of data storage flashing when saving data MR Revie...

Страница 12: ...age coil provides the excitation signal and induces a potential V on the circuit under test Under the action of the potential V a current I will be generated in the circuit under test The clamp meter measures V and I and uses the following formula to obtain the measured resistance R R V I IX Operation Method 1 Boot up Boot DO NOT press the trigger don t open jaws nor clamp any wire Boot complete s...

Страница 13: ...atically entered If there is no normal self calibration the instrument will display the Er symbol to indicate that the power on error occurs The common cause of the power on error is that the jaws are not closed properly plunge the wires etc when starting up 5 minutes after power on automatically shut down before the automatic shutdown device will flash for 30 seconds then press the power button w...

Страница 14: ...urement can be performed At this point withhold the trigger open the jaws clamp the circuit under test and read the resistance value The large middle digit shows OLΩ indicating that the measured resistance exceeds the upper limit of the clamp meter The middle large number shows L0 01 Ω indicating that the measured resistance exceeds the lower limit of the clamp meter Resistance clock mode The meas...

Страница 15: ... the MODE button to switch To modify the data press the SET button again to save and exit 5 Alarm Settings After power on short press AL key to turn on or off the alarm function long press AL key to set the resistance alarm value press the SET key and MEM key to change the current size short press MODE key to switch Alarm mode long press AL key to save and exit When the measured resistance is grea...

Страница 16: ...s and automatically numbers if the memory is full the instrument flashes to display MEM symbol press MEM key to enter the data review store data reading interface MR symbol display Press AL or SET key to select the corresponding data of the array number with a step value of 1 and press MEM again to exit See the figure below The left figure flashes the MEM symbol when the data is stored The current...

Страница 17: ...cts measurement accuracy ⅩI Field Application 1 Multi Point Grounding System As for the multi point grounding system such as electricity transmission tower grounding system grounding cable communications systems certain buildings etc They usually pass the overhead ground wire cable shielding layer connected to form a grounding system See below As the Meter is in the above measurement its equivalen...

Страница 18: ...rom an engineering perspective In this way the resistance we measured should be R1 Times of comparing tests in different environments and different occasions with the traditional method proved that the above assumption is entirely reasonable 2 Limited Point Grounding System This is also quite common For example in some towers five towers are linked with each other through overhead ground wire Besi...

Страница 19: ... Meter in the different grounding branches It is nonlinear equations with N unknown numbers and N equations It indeed has a definite solution but it is very difficult to solve the issue artificially even impossible when N is larger Therefore you re expected to buy the Limited Point Grounding System Solution software produced by our company Users can use the office computer or notebook computer to ...

Страница 20: ...ries Meter can only measure the loop resistance and the single point grounding is not measured However users will be able to use a testing line very near to the earth electrode of the grounding system to artificially create a loop for testing The following presented is two kinds of methods for the single point grounding measurement by use of the Meter These two methods can be applied to the occasi...

Страница 21: ...istance value by connecting the test lines with both ends So if the measurement value of the Meter is smaller than the allowable value of the grounding resistance then the two grounding bodies are qualified for grounding resistance 2 Three Point Method As shown in the figure below in the vicinity of the measured grounding body RA find two independent grounding bodies of better grounding state RB a...

Страница 22: ...wo series grounding resistance In this way we can easily calculate the value of each grounding resistance From R1 RA RB R2 RB RC R3 RC RA We get RA R1 R3 R2 2 This is the grounding resistance value of the grounding body RA To facilitate the memory of the above formula these three grounding bodies scan be viewed as a triangle then the measured resistance is equivalent to the value of the resistance...

Страница 23: ...resistance values of the other two grounding bodies are RB R1 RA RC R3 RA ⅪI Accessories Earth Tester 1PC Battery 5th alkaline battery 4PCS Test Loop 1PC Monitor software CD FR2000C 1PC USB line FR2000C 1PC User s Manual 1SET Carrying Case 1PC ...

Страница 24: ... ZhengNeng Electronics Technology Co Address 2F No 15 Baoshu Road Taihe Baiyun District Guangzhou Guangdong China Toll free call 4000 1515 38 Tel 86 20 36544172 Fax 86 20 37319075 Post 510540 WebSite www znele com ...

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