An insulation and continuity tester that delivers 250 V and 500 V insulation testing plus high-speed continuity measurement, all in a soft-armoured IP 54-rated case. It features a clear digital/analogue display, automatic discharge of the circuit under test, live-circuit voltage warning and safety interlock systems.
An insulation and continuity tester that delivers 250 V and 500 V insulation testing plus high-speed continuity measurement, all in a soft-armoured IP 54-rated case. It features a clear digital/analogue display, automatic discharge of the circuit under test, live-circuit voltage warning and safety interlock systems.
The MIT300 series of insulation and continuity testers have been developed to meet the needs of today’s electrical contractors. They are not only durable and easy to use, but also incorporate a comprehensive set of features designed to ensure operator safety, even under conditions of accidental misuse.
All products in the MIT300 range offer automatic discharge of the circuit after testing, audible and visual warning if the test probes are applied to a live circuit, and a test inhibit feature which operates automatically under live circuit conditions. The units also conform fully to IEC 61010-1 for use in Category III 600 V applications, and provide all of the facilities needed to meet insulation testing requirements relating to the current edition of the IEE Wiring Regulations.
All instruments in the the MIT300 range provide indication of insulation resistance up to 999 MΩ, 200 mA continuity testing, a fast-reacting continuity buzzer, and facilities for nulling the resistance of the test leads. The entry-level MIT300 offers insulation test voltages of 250 V and 500 V, while the remaining models allow testing at 250 V, 500 V, and 1000 V.
In line with other products in Megger's comprehensive new contractor range, MIT300 insulation testers feature rugged construction, with an impact-resistant rubber-overmoulded case, and innovative circuitry which guarantees high accuracy combined with stability of calibration. All testers come complete with a full calibration certificate.
Caractéristiques
| Insulation Range | 500 V, 250 V (DC) |
| Measuring Range | 10 to 999 MΩ on all ranges |
| Short Circuit Current | 1.5 mA nominal |
| Test Current on Load | 1 mA at minimum pass values of insulation (per BS7671, HD 384, IEC 364) |
| Accuracy (at 68°F (20°C)) | ±3%, ±2 digits up to 10 MΩ; ±5% up to 100 MΩ; ±30% up to full scale |
| Continuity Measuring Range | 0.01 Ω – 99.9 Ω (0–50 Ω on analogue scale) |
| Open Circuit Voltage | 5 V ± 1 V |
| Short Circuit Current | 205 mA +10 mA / –5 mA |
| Continuity Accuracy (at 68°F (20°C)) | ±3% ±2 digits |
| Continuity Measuring Range (dual scale) | 0 to 2 Ω / 200 Ω / 2 kΩ |
| Continuity Open Circuit Voltage | 1.5 V ± 0.5 V |
| Zero Offset Adjust | 0 to 9 Ω |
| Continuity Buzzer Threshold | Operates at < 5 Ω |
| Continuity Buzzer Response Time | < 20 ms |
| Operating Range | 14 to 140°F (-10 to 60 °C) |
| Operating Humidity | 93% R.H. at 140°F (40°C) maximum |
| Storage Range | -13 to 158°F (-25 to 70°C) |
| Communications | USB interface |
| Environmental Protection | IP54 |
| Fuses | 500 mA (F) 600 V, 1.26 x 0.24" (32 x 6 mm) Ceramic HBC, 10 kA minimum |
| Fuse Status | Display shows if fuse is ruptured |
| Safety | IEC61010-1 Cat III 600 V phase to earth |
| Automatic Discharge | Yes; instrument auto-discharges item under test after insulation test |
| Power Supply | 8 x 1.5 V cells IEC LR6 type (AA alkaline) |
| Rechargeable Battery Compatibility | NiCd or NiMH cells may be used |
| Battery Indicator | Four-section battery condition bar graph on display |
| Battery Life | 5000 consecutive tests (5 seconds per test) using 2 Ah batteries |
| E.M.C. | IEC61326-1 |
| Dimensions | 8 x 5.7 x 3.2" (203 x 148 x 78 mm) |
| Weight | 2.16 lbs (980 g) |
| Insulation Range | 500 V, 250 V (DC) |
| Measuring Range | 10 to 999 MΩ on all ranges |
| Short Circuit Current | 1.5 mA nominal |
| Test Current on Load | 1 mA at minimum pass values of insulation (per BS7671, HD 384, IEC 364) |
| Accuracy (at 68°F (20°C)) | ±3%, ±2 digits up to 10 MΩ; ±5% up to 100 MΩ; ±30% up to full scale |
| Continuity Measuring Range | 0.01 Ω – 99.9 Ω (0–50 Ω on analogue scale) |
| Open Circuit Voltage | 5 V ± 1 V |
| Short Circuit Current | 205 mA +10 mA / –5 mA |
| Continuity Accuracy (at 68°F (20°C)) | ±3% ±2 digits |
| Continuity Measuring Range (dual scale) | 0 to 2 Ω / 200 Ω / 2 kΩ |
| Continuity Open Circuit Voltage | 1.5 V ± 0.5 V |
| Zero Offset Adjust | 0 to 9 Ω |
| Continuity Buzzer Threshold | Operates at < 5 Ω |
| Continuity Buzzer Response Time | < 20 ms |
| Operating Range | 14 to 140°F (-10 to 60 °C) |
| Operating Humidity | 93% R.H. at 140°F (40°C) maximum |
| Storage Range | -13 to 158°F (-25 to 70°C) |
| Communications | USB interface |
| Environmental Protection | IP54 |
| Fuses | 500 mA (F) 600 V, 1.26 x 0.24" (32 x 6 mm) Ceramic HBC, 10 kA minimum |
| Fuse Status | Display shows if fuse is ruptured |
| Safety | IEC61010-1 Cat III 600 V phase to earth |
| Automatic Discharge | Yes; instrument auto-discharges item under test after insulation test |
| Power Supply | 8 x 1.5 V cells IEC LR6 type (AA alkaline) |
| Rechargeable Battery Compatibility | NiCd or NiMH cells may be used |
| Battery Indicator | Four-section battery condition bar graph on display |
| Battery Life | 5000 consecutive tests (5 seconds per test) using 2 Ah batteries |
| E.M.C. | IEC61326-1 |
| Dimensions | 8 x 5.7 x 3.2" (203 x 148 x 78 mm) |
| Weight | 2.16 lbs (980 g) |
