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Ideal for applications ranging from railways and aircraft to the resistance of components in the industry, this low-resistance ohmmeter combines rugged construction with accuracy and ease of use. In addition, power it with a rechargeable battery or mains power for continuous testing in production line/repetitive use environments.
Ideal for applications ranging from railways and aircraft to the resistance of components in the industry, this low-resistance ohmmeter combines rugged construction with accuracy and ease of use. In addition, power it with a rechargeable battery or mains power for continuous testing in production line/repetitive use environments.
Combining the ultimate simplicity of operation with a rugged IP65 case designed for stable ground and bench operation, this ohmmeter features rotary switch controls that are simple and easy to operate in all weather conditions and with gloved hands. It provides significantly enhanced compliance and delivers 10 A into measurements up to 250 mΩ and 1 A up to 2.5 Ω. Additionally, a large, clear, backlit LCD is easy to read from a distance.
Features
Test modes
Normal mode is initiated by pressing the 'Test' button after connecting the test leads to the unit under test. The continuity of all four connections is checked. Current is applied in both forward and reverse directions following which measurement is displayed.
Automatic mode is started as soon as the probes make contact. Forward and reverse current measurements are made and the average value is displayed. This mode is ideal when working with handspikes. Each time the probes are removed and reconnected to the load a new test will be performed without the need to press the test button.
Automatic unidirectional mode applies current in one direction only to speed up the measurement process. However thermal EMF resulting from dissimilar metal bonds can cause lower accuracy. The test starts automatically when probes are connected.
Continuous mode allows repeated measurements to be made on the same sample. Simply connect the test leads and press the test button. The measurement is updated every three seconds until the circuit is broken.
Inductive mode is selected when measuring resistance on, for example, motors and generators. When measuring inductive loads it is necessary to wait for the voltage to stabilize as the inductive element is charged. Test leads are firmly connected to the device under test and the 'Test' button is pressed. The instrument will pass the selected current through the sample continuously in one direction only and take repetitive readings that will gradually decrease to the true value as the voltage stabilizes. The operator decides when the result is stable and presses the 'Test' button to terminate the test.
Applications
| Resistance/Current Ranges | The green resistance ranges on the keypad indicate low output power (<0.25 W) outputs Red ranges indicate higher 2.5 W (1 A) and 25 W (10 A) power outputs |
| Resolution and Accuracy | Test current accuracy: ±10% Voltmeter input impedance: >200 kΩ Maximum lead resistance at 10 A <100 mΩ |
| Temperature Coefficient | <0.01% per °C, from 5 to 40°C |
| Maximum Lead Resistance | 100 mΩ total for 10 A operation irrespective of battery condition |
| Noise Rejection | Less than 1% ±20 digits additional error with 100 mV peak 50/60 Hz on the potential leads A warning will show if hum or noise exceeds this level |
| Selection | Mode: Left rotary switch Range: Right rotary switch |
| Display Size/Type | Main 5 digit + 2 x 5 digit secondary displays |
| Backlight | LED backlight |
| Power Supply | Battery type: 6 V, 7 Ah sealed lead acid Battery life: >1000 automatic (3 second) tests Charge time: 8 hours Voltage input range: 100 to 240 V, 50/60 Hz, 90 VA |
| Automatic Power Down | 300 seconds |
| Environmental Conditions | Reference conditions: 20°C ±3°C Operating temperature and humidity: 14 to 122°F (-10 to 50°C), <90% RH Storage temperature and humidity: -13 to 140°F (-25 to 60°C), <90% RH Maximum altitude: 6562' (2000 m) to full safety specifications |
| IP Rating | IP65 case closed, IP54 battery operation |
| Safety Rating | In accordance with IEC61010-1 |
| EMC | In accordance with IEC61326-1 (heavy industrial) |
| Dimensions | 12.4 x 11.2 x 7.1" (315 x 285 x 181 mm) |
| Weight | 14.8 lbs (6.7 kg) |
| Resistance/Current Ranges | The green resistance ranges on the keypad indicate low output power (<0.25 W) outputs Red ranges indicate higher 2.5 W (1 A) and 25 W (10 A) power outputs |
| Resolution and Accuracy | Test current accuracy: ±10% Voltmeter input impedance: >200 kΩ Maximum lead resistance at 10 A <100 mΩ |
| Temperature Coefficient | <0.01% per °C, from 5 to 40°C |
| Maximum Lead Resistance | 100 mΩ total for 10 A operation irrespective of battery condition |
| Noise Rejection | Less than 1% ±20 digits additional error with 100 mV peak 50/60 Hz on the potential leads A warning will show if hum or noise exceeds this level |
| Selection | Mode: Left rotary switch Range: Right rotary switch |
| Display Size/Type | Main 5 digit + 2 x 5 digit secondary displays |
| Backlight | LED backlight |
| Power Supply | Battery type: 6 V, 7 Ah sealed lead acid Battery life: >1000 automatic (3 second) tests Charge time: 8 hours Voltage input range: 100 to 240 V, 50/60 Hz, 90 VA |
| Automatic Power Down | 300 seconds |
| Environmental Conditions | Reference conditions: 20°C ±3°C Operating temperature and humidity: 14 to 122°F (-10 to 50°C), <90% RH Storage temperature and humidity: -13 to 140°F (-25 to 60°C), <90% RH Maximum altitude: 6562' (2000 m) to full safety specifications |
| IP Rating | IP65 case closed, IP54 battery operation |
| Safety Rating | In accordance with IEC61010-1 |
| EMC | In accordance with IEC61326-1 (heavy industrial) |
| Dimensions | 12.4 x 11.2 x 7.1" (315 x 285 x 181 mm) |
| Weight | 14.8 lbs (6.7 kg) |
