Stakeless Testimine
Fluke 1623-2 maandustesti suudab mõõta maandussilmuste takistusi ainult klambrite abil. Selle katsemeetodi puhul asetatakse kaks klambrit ümber maandusmaandusvarda ja mõlemad ühendatakse testeriga. Maanduspiire ei kasutata üldse. Ühe klambriga indutseeritakse teadaolev, fikseeritud pinge ja teise klambriga mõõdetakse voolu. Seejärel määrab tester automaatselt kindlaks maandatud varraste takistuse. See katsemeetod töötab ainult siis, kui katsetataval hoonel või konstruktsioonil on ühendatud maandussüsteem, kuid enamasti on see olemas. Kui on ainult üks tee maanduseni, nagu paljudes elamutes, ei anna Stakeless-meetod vastuvõetavat väärtust ja tuleb kasutada fall-of-potential-katsemeetodit.
Stakeless-katsete puhul ei ole vaja maandusvarda lahti ühendada, mistõttu ühendatud maandussüsteem jääb katse ajal puutumata. Möödas on aeg, mil tuli kulutada aega iga süsteemi maandusvarda paigutamiseks ja ühendamiseks - see on suur aja kokkuhoid. Võite teha maanduskatseid ka kohtades, mida te varem ei ole kaalunud: hoonete sees, elektripostide sees või kõikjal, kus teil puudub juurdepääs pinnasele.
Kõige täiuslikum tester
Fluke 1623-2 on ainulaadne maandusmaanduse tester, mis suudab teostada kõiki nelja tüüpi maandusmaanduse mõõtmisi.
3- ja 4-pooluseline fall-of-potential (vaiade abil).
4-pooluseline pinnase takistusjõu testimine (vaiade abil)
Valikuline testimine (kasutades 1 klambrit ja panuseid)
Vaakadeta testimine (kasutades ainult 2 klambrit)
General Specifications
Display: 1999 digit LCDDisplay with special symbols, digit height 25 mm, fluorescent backlight
User interfaceInstant measurement through TURN and START one button concept. The only operating elements are rotary switch and START button
Robust, water and dust resistantInstrument is designed for tough environmental conditions (rubber protective cover, IP56)
MemoryInternal memory storage up to 1500 records accessible via USB port
Temperature Range
Operating temperature-10°C to 50°C (14°F to 122°F)
Storage temperature-30°C to 60°C (-22°F to 140°F)
Temperature coefficient±0.1% of reading/°C < 18°C > 28°C
Intrinsic errorRefers to the reference temperature range and is guaranteed for 1 year
Operating errorRefers to the operating temperature range and is guaranteed for 1 year
Climatic classC1 (IEC 654-1), -5°C to +45°C (23° to +115° F), 5% to 95% RH
Protective typeIP56 for case, IP40 for battery door according to EN60529
SafetyProtection by double and/or reinforced insulation. max. 50 V to earth. IEC61010-1: Pollution degree 2
EMC (emission immunity)IEC61326-1: Portable
Quality systemDeveloped, designed and manufactured according to DIN ISO 9001
External voltageV ext, max = 24 V (DC, AC < 400 Hz), measurement inhibited for higher values
V ext rejection> 120 dB (162⁄3, 50, 60, 400 Hz)
Measuring timeTypical 6 seconds
Max. overload250 V rms (pertains to misuse)
Auxiliary power6 x 1.5 V Alkaline (type AA LR6)
Battery life spanTypical > 3,000 measurements
Dimensions (W x H x D)250 x 133 x 187 mm (9.75 x 5.25 x 7.35 in)
Weight1.1 kg (2.43 lb) including batteries
7.6 kg (16.8 lb) incl. accessories and batteries in carrying case
RA 3-Pole Ground Resistance Measurement (IEC 1557-5)
Switch positionRA 3-pole
Resolution0.001 Ω to 10 Ω
Measuring range0.020 Ω to 19.99 kΩ
Accuracy±(2% rdg + 3 d)
Operating error±(5% rdg + 3 d)
Measuring Principle: Current/Voltage Measurement
Measuring voltageVm = 48 V AC
Short-circuit current> 50 mA
Measure frequency128 Hz
Probe resistance (RS)Max 100 kΩ
Auxiliary earth electrode resistance (RH)Max 100 kΩ
Additional error from RH and RSRH[kΩ]•••RS[kΩ]/RA[Ω]•••0.2%
Monitoring of RS and RH with error indicator.
Automatic range selection.
Measurement is not performed if the current through the current clamp is too low.
RA 4-Pole Ground Resistance Measurement (IEC 1557-5)
Switch positionRA 4-pole
Resolution0.001 Ω to 10 Ω
Measuring range0.020 Ω to 19.99 kΩ
Accuracy±(2% rdg + 3 d)
Operating error±(5% rdg + 3 d)
Measuring Principle: Current/Voltage Measurement
Measuring voltageVm = 48 V AC
Short-circuit current> 50 mA
Measure frequency128 Hz
Probe resistance (RS + RES)Max 100 kΩ
Auxiliary earth electrode resistance (RH)Max 100 kΩ
Additional error from RH and RSRH[kΩ]•••RS[kΩ]/RA[Ω]•••0.2%
Monitoring of RS and RH with error indicator.
Automatic range selection.
RA 3-Pole Selective Ground Resistance Measurement with Current Clamp (RA with Clamp )
Switch positionRA 3-pole with clamp
Resolution0.001 Ω to 10 Ω
Measuring range0.020 Ω to 19.99 kΩ
Accuracy±(7% rdg + 3 d)
Operating error±(10% rdg + 5 d)
Measuring Principle: Current/Voltage Measurement (with External Current Clamp)
Measuring voltageVm = 48 V AC
Short-circuit current> 50 mA
Measure frequency128 Hz
Probe resistance (RS)Max 100 kΩ
Auxiliary earth electrode resistance (RH)Max 100 kΩ
Monitoring of RS and RH with error indicator.
Automatic range selection.
Measurement is not performed if the current through the current clamp is too low.
RA 4-Pole Selective Ground Resistance Measurement with Current Clamp (RA with Clamp )
Switch positionRA 4-pole with clamp
Resolution0.001 Ω to 10 Ω
Measuring range0.020 Ω to 19.99 kΩ
Accuracy±(7% rdg + 3 d)
Operating error±(10% rdg + 5 d)
Measuring Principle: Current/Voltage Measurement (with External Current Clamp)
Measuring voltageVm = 48 V AC
Short-circuit current> 50 mA
Measure frequency128 Hz
Probe resistance (RS)Max 100 kΩ
Auxiliary earth electrode resistance (RH)Max 100 kΩ
Monitoring of RS and RH with error indicator.
Automatic range selection.
Measurement is not performed if the current through the current clamp is too low.
Stakeless Ground Loop Measurement (2 Clamps )
Switch positionRA 4-pole 2 clamps
Resolution0.001 Ω to 10 Ω
Measuring range0.020 Ω to 19.99 kΩ
Accuracy±(7% rdg + 3 d)
Operating error±(10% rdg + 5 d)
Measuring Principle: Stakeless Measurement of Resistance in Closed Loops Using Two Current Transformers
Measuring voltageVm = 48 V AC
Measure frequency128 Hz
Noise current (IEXT)Max. IEXT = 10 A (AC) (RA < 20 Ω)
Max. IEXT = 2 A (AC) (RA > 20 Ω)
Automatic range selection.
The information regarding stakeless ground loop measurements is only valid when used in conjunction with the recommended current clamps at the minimum distance specified.
