| Specifications: | Fluke 1625-2 Geo Earth Ground Tester |
| General Specifications |
| Memory | Internal memory storage up to 1500 records accessible via USB port |
| Measuring Function | Interference voltage and frequency, earthing resistance 3- and 4-pole with/without clip-on current transformer, resistance 2-pole with AC, 2- and 4-pole with DC |
| Display | 4 digit (2999 Digit) - 7 segment liquid crystal display, with improved visibility |
| Operation | Central rotary switch and function keys |
| 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 |
| Type of protection | IP56 for case, IP40 for battery door according to EN60529 |
| Max voltage | Warning – socket "clamp" to socket E, ES, S or H |
| Urms = 0 V |
| Sockets E, ES, S or H to each other in any combination, max. Urms = 250 V (pertains to misuse) |
| Safety | Protection by double and/or reinforced insulation. Max. 50 V to earth per IEC61010-1. 300V CAT II, Pollution degree 2 |
| Quality standard | Developed, designed and manufactured to comply with DIN ISO 9001 |
| External field influence | Complies with DIN 43780 (8/76) |
| Auxiliary power | 6 x 1.5 V alkaline (IEC LR6 or type AA) |
| Battery life span | With IEC LR6/type AA: typ. 3,000 measurements (RE+RH = 1 kO) |
| With IEC LR6/type AA: typ. 6,000 measurements (RE + RH > 10 kO) |
| Dimensions (W x H x D) | 250 x 133 x 187 mm (9.75 x 5.25 x 7.35 in) |
| Weight | = 1.1 kg (2.43 lb) without accessories 7.6 kg (16.8 lb) incl. accessories and batteries in carrying case |
| Case material | Polyester |
| Measurement of Interference Voltage DC + AC (UST) |
| Measuring limits of error: method | Full wave rectification |
| Measuring range | 1 V to 50 V |
| Display range | 0.0 V to 50 V |
| Resolution | 0.1 V |
| Frequency range | DC/AC 45 Hz to 400 Hz sine |
| Accuracy | ±(5% of rdg + 5 digit) |
| Measuring sequence | Approx. 4 measurements/s |
| Internal resistance | Approx. 1.5 MO |
| Max. overload | Urms = 250 V |
| Measurement of Interference Frequency (F) |
| Measuring limits of error: method | Measurement of oscillation period of the interference voltage |
| Measuring range | 6.0 Hz to 400 Hz |
| Display range | 16.0 Hz to 299.9 Hz to 999 Hz |
| Resolution | 0.1 Hz to 1 Hz |
| Range | 1 V to 50 V |
| Accuracy | ±(1% of rdg + 2 digit) |
| Earthing Resistance (RE) |
| Measuring method | Current and voltage measurement with probe as IEC61557-5 |
| Open circuit voltage | 20/48 V, AC |
| Short circuit current | 250 mA AC |
| Measuring frequency | 94, 105, 111, 128 Hz selected manually or automatic. (AFC) 55 Hz in function R1 |
| Noise rejection | 120 dB (16 2/3 , 50 , 60, 400 Hz) |
| Max. overload | Urms = 250 V |
| Electrical Measurement Specifications |
| Intrinsic Error or Influence Quantity | Reference Conditions or Specified Operating Range | Designation Code | Requirements or Test in Accordance with the Relevant Parts of IEC 1557 | Type of Test |
| Intrinsic error | Reference conditions | A | Part 5, 6.1 | R |
| Position | Reference position ±90° | E1 | Part 1, 4.2 | R |
| Supply voltage | At the limits stated by the manufacturer | E2 | Part 1, 4.2, 4.3 | R |
| Temperature | 0°C and 35°C | E3 | Part 1, 4.2 | T |
| Series interference voltage | See 4.2 and 4.3 | E4 | Part 5, 4.2, 4.3 | T |
| Resistance of the probes and auxiliary earth electrodes | 0 to 100 x RA but = 50 kO | E5 | Part 5, 4.3 | T |
| System frequency | 99% to 101% of the nominal frequency | E7 | Part 5, 4.3 | T |
| System voltage | 85% to 110% of the nominal voltage | E8 | Part 5, 4.3 | T |
| Operating error | B = ±(|A| + 1,15 vE21 E22 E23 E24 E25 E26 ) | Part 5, 4.3 | R |
| B[%] = ± B/fiducial value x 100% |
| A = intrinsic error |
| En = variations |
| R = routine test |
| T = type test |
| Measuring range | 0.020 O to 300 kO |
| Display range | 0.001 O to 2.999 O |
| 3.00 O to 29.99 O |
| 30.0 O to 299.9 O |
| 0.300 kO to 2.999 kO |
| 3.00 kO to 29.99 kO |
| 30.0 kO to 299.9 kO |
| Resolution | 0.001 O |
| 0.01 O |
| 0.1 O |
| 1 O |
| 10 O |
| 100 O |
| Accuracy | ±(2% of rdg + 2 digit) |
| Operating error | ±(5% of rdg + 5 digit) |
| Measuring time | Typical 8 seconds with a fixed frequency 30 sec. max. with AFC and complete cycle of all measuring frequencies |
| Additional error because of probe-and auxiliary earth electrode resistance | RH(RS + 2000 O)/RE x 1.25 x 10-6% + 5 digits |
| Measuring error of RH and RS | Typ. 10% of RE + RS + RH |
| Max. probe resistance | = 1 MO |
| Max. auxiliary earth electrode resistance | = 1 MO |
Automatic check if error is kept within the limits required by IEC61557-5.
If after a measurement of probe-, auxiliary earth electrode- and earthing resistance, a measurement error of higher than 30% is assumed because of the influencing conditions, the display shows a warning symbol and a notice that RS or RH are too high. |
| Automatic Switchover of Measuring Resolution in Dependence to Auxiliary Earth Electrode Resistance RH |
| RH with Umeas = 48 V | < 300 O |
| < 6 O |
| < 60 O |
| < 600 O |
| RH with Umeas = 20 V | < 250 O |
| < 2.5 kO |
| < 25 kO |
| < 250 kO |
| Resolution | 1 mO |
| 10 mO |
| 100 mO |
| 1 O |
| Selective Measurement of the Earthing Resistance (RE Clamp) |
| Measuring method | Current and voltage measurement with probe as per EN61557-5 and current measurement in the individual branch with additional current transformer (patent applied for). |
| Open circuit voltage | 20/48 V AC |
| Short circuit current | 250 mA AC |
| Measuring frequency | 94, 105, 111, 128 Hz selected manually or automatically (AFC), 55 Hz (R1) |
| Noise rejection | 120 dB (162/3, 50, 60, 400 Hz) |
| Max. overload | Max. Urms = 250 V (measurement will not be started) |
| Measuring range | 0.020 O to 300 kO |
| Display range | 0.001 O to 2.999 O |
| 3.00 O to 29.99 O |
| 30.0 O to 299.9 O |
| 0.300 kO to 2.999 kO |
| 3.00 kO to 29.99 kO |
| Resolution | 0.001 O |
| 0.01 O |
| 0.1 O |
| 1 O |
| 10 O |
| Accuracy | ±(7% of rdg + 2 digit) |
| Operating error | ±(10% of rdg + 5 digit) |
| Additional error because of probe- and auxiliary earth typ. electrode resistance | RH(RS + 2000 ?)/RETOTAL x 1.25 x 10-6% + 5 digits |
| Measuring error of RH and RS | Typ. of 10% of RETOTAL + RS + RH |
| Measuring time | Typ. 8 sec. with a fixed frequency 30 sec. max. with AFC and complete cycle of all measuring frequencies. |
