Related Manuals for Huazheng HZRC2000+
Summary of Contents for Huazheng HZRC2000+
- Page 1 HZRC2000+ Earth Resistance Tester Huazheng Electric Manufacturing (Baoding) Co., Ltd.,...
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Page 2: Table Of Contents
Contents I. Attention ..........................1 II. Brief Introduction ......................2 II. Specification ........................3 IV. Structure of Meter ......................6 V. Liquid Crystal Display ...................... 6 VI．Function Zoom Table ....................9 VII. Operating Method ......................10 VIII. Measurement Principle ....................15 IX. Measurement Method of Earth Resistance ..............16 X. -
Page 3: Attention
I. Attention Thank you for purchasing this pincers earth tester from Huazheng Electric Manufacturing (Baoding) Co., Ltd. In order to make better use of the product, please be certain: ----To read this user manual carefully. ----To comply with the operating cautions presented in this manual. -
Page 4: Brief Introduction
II. Brief Introduction This instrument was designed by technical department of Huazheng Electric Manufacturing (Baoding) Co., Ltd.. Its performance is mainly reflected in: Breakthrough in self-test the boot a long time to wait, start immediately into the test. Breakthrough relay self-test mode, using advanced processing algorithms and ... -
Page 5: Specification
HZRC series of Pincers Earth Tester can measure the integrated value of the grounding body resistance and the grounding lead resistance. HZRC series of Pincers Earth Tester is equipped with a long jaw, as indicated in the figure below. A long jaw is particularly suitable for the occasion of grounding with the flat steel. In addition, C+ Pincers Earth Tester is also able to measure the leakage current and the neutral current in the grounding system. - Page 6 2. Ranges and Accuracy of Measurement Mode Range Resolutio Accuracy 0.010Ω-0.099Ω 0.001Ω ± （ 1% ＋ 0.10Ω-0.99Ω 0.01Ω ± （ 1% ＋ 1.0Ω-49.9Ω 0.1Ω ± （ 1% ＋ 50.0Ω-99.5Ω 0.5Ω ± （ 1.5% ＋ Resistance 100Ω-199Ω 1Ω ±（2%＋1Ω） 200Ω-395Ω 5Ω ±（5%＋5Ω）...
- Page 7 -IK04, as per EN 50102 Ed 95 Dimensions(L×W×H): -Long elliptic jaw: 285mm×90mm×66mm; (11×4×3 inches) -Round jaw: 260mm×90mm×66mm;(10×4×3 inches) Span of Jaw: Long elliptic jaw 35mm; round jaw 32mm Weight (including batteries): Long elliptic jaw-1160g, Round jaw-1120g Battery type: 4 ×1.5V alkaline LR6 AA battery Low battery indication: is displayed Internal consumption: <50mA...
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Page 8: Structure Of Meter
IV. Structure of Meter 1. Long Pincers Jaw : 65mmx32mm 2. Round Pincer Jaw : φ32mm 3. Trigger: to control opening and closing of jaw 4. HOLD Key: lock / Release display / Storage 5. POWER Key: Boot Up / Shutdown /*Quit /Clear Data 6. - Page 9 (2). Symbol of low battery & voltage (3). Symbol of full data storage (4). Symbol of data access (5). 2-Digital No. Of Data Storage Unit (6). Current unit (7). Resistance unit (8). Noise signal (9). Data lock symbol (10).Symbol of an open jaw (11).
- Page 10 ⑵. “Er” Boot error symbol, May be pressing trigger when boot or jaw has been opened. Symbol of low battery & voltage: when the battery voltage is lower than 5.3V, the ⑶. symbol shows. At this time, it cannot guarantee accuracy of the measurements. Batteries should be replaced.
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Page 11: Function Zoom Table
⑶. ---Measured loop resistance is less than 0.01Ω ⑷. ---Measured loop resistance is 5.1Ω ⑸. ---Measured loop resistance is 2.1Ω ---Lock the current measurement value: 2.1Ω ---Auto storage as 08 set data ⑹. ---Access to the stored data of Unit No.26 ---Measured loop resistance is 0.028Ω... -
Page 12: Operating Method
have stored *Delete all the data have SET+MODE stored Note: “*”just for C type. VII. Operating Method 1.Boot up Boot , DO NOT press the trigger, don’t open jaws, nor clamp any wire Boot complete, show “OL Ω”, then press the trigger, open jaws, clamp the measured wire Before booting up, the trigger should be pressed for a couple of times to ensure the jaws are well... - Page 13 However, when measured with the test ring, still gives the correct result, indicating Clamp measured only in the high-value (for example, more than 100Ω) has large errors, When measuring a small resistance retains the original Accuracy, the user can rest assured use.
- Page 14 Figure 5It shows "OL Ω”, indicating that the measured resistance value exceeded the upper limit of Meter, see Figure 2. It shows "L0.01Ω”, indicating that the measured resistance value exceeded the lower limit of Meter, see Figure 6. Flashing display symbols , go with intermittent "beep--beep--beep--"...
- Page 15 measurement. In the MR state, need to press MEM key to exit the MR state, then continue to measurement. In setting Alarm Critical Value state, need to press the POWER key or press the AL key for 3 seconds, exit Alarm Critical Value state, then continue to measurement. In the resistance test model, press A key to switch to current test model.
- Page 16 for 3 seconds, exit Alarm Critical Value state, then press MEM key to enter data storage model. 7．Alarm Settings In the test model, press AL key to turn on or shutdown alarm function. In test model, press AL key for 3 seconds, then enter to set alarm critical value function, temporality, the highest-digit flashing, first set a maximum bit, shown in Figure 13, Figure 14.
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Page 17: Measurement Principle
9．Clear Data In the data access model, press MEM+POWER, automatism clear all the stored data. After clearing display show in Figure 12. The data can’t be restore after clear. Note: "*" is limited to C+. VIII. Measurement Principle 1. Principle of Resistance Measurement The basic principle of HZRC in the measurement of resistance is to measure the loop resistance, as shown in the figure below. -
Page 18: Measurement Method Of Earth Resistance
Where: n is the turn ratio of the secondary side vs. primary side. IX. Measurement Method of Earth Resistance 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. - Page 19 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;...
- Page 20 In principle, in addition to ignoring the mutual resistance, this method does not have the measurement error caused by neglecting R However, users need to pay attention to that: in response to the number of the grounding bodies mutually linked in your grounding system, it is necessary to measure the same number of the testing values for calculating of the program, not more or less.
- Page 21 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 find two independent grounding bodies of better grounding state R and R...
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Page 22: Field Application
the measured resistance is equivalent to the value of the resistance values of the adjacent edges plus or minus resistance value of the opposite sides, and divided by 2. As the reference points, the grounding resistance values of the other two grounding bodies are: RB=R1-RA RC=R3-RA... - Page 23 (1) The measurement of the grounding resistance of machine room in the building The machine room of telecommunication system normally in the upper deck of the building, and it hard to use the megohm meter to measure. However, it is very convenient to for HZRC.
- Page 24 Base on JJF2-2003<<Grounding Type Antistatic Device Test Specification>>, gas station mainly need to test the grounding resistance and connect resistance of the facility shows below The meter has to obey the requirement of GB3836-2000<<Electrical Equipments Used in Explosive Gas Environment>> Item Technical Specification Grounding resistance of oil tank...
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Page 25: Matters Need Attention When Measuring Grounding Resistance
(2) The measurement of grounding resistance of tanker As shows above, find a grounding pole which is independent with tanker, like the grounding pole of upload and load place. Connect these two points by testing line, read the value of R by meter. - Page 26 mention below. (1).whether the grounding body which being measured is disconnect with earth system when use traditional way like voltage-current method. If not, then the value is a parallel result of all the grounding body. It is useless to measure the parallel result of all the grounding body, because the aim why we measure the grounding resistance is compare it with a allowable value which is stipulated by relevant standards, to justice whether the grounding resistance is up to standard.
- Page 27 condition of disconnect with grounding line, measured by voltage-current, the value is just for grounding resistance. Obviously, the former one is larger than the latter one. The contact resistance of branch and public grounding line is what makes them different. What need to specify is the grounding resistance should include the resistance of lead line which is stipulated by the national standard.
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Page 28: Packing List
XII. Packing list Item Earth Tester Test Loop Carrying Case XIII. Parts List and Assembly Details 1. Parts List NAME Part Quantity/PCS Remark Screws of battery cover DS01 M3X8 AA alkaline batteries DS02 Battery cover DS03 Upper shell DS04 Subjacent shell DS 05 Tension spring DS 06... -
Page 29: Trouble Shooting
XIV. Trouble shooting Symptoms Possible Causes Remedies No batteries. Set the batteries. Faulty battery polarity Install batteries in correct polarity. Insufficient capacity of battery Replace the batteries. Poor contact battery Replace the battery contacts. contacts Wrong battery type Replace with right type. Make a continuity test of test lead. - Page 30 Measure in wrong steps Study the manual and follow it. Replace the battery when “Low Insufficient capacity of battery battery” mark is displayed on the LCD. Poor enclose jaw, Trigger the clamp several times indicating “jaw-open” symbol and then re-boot. on LCD Incapable measurement...
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