Seaward Cropico DO4A Portable Digital Ohmmeter
Whether you're in the workshop, out in the field or working in a test facility, Seaward Cropico's portable DO4A digital low resistance ohmmeter is suitable for the job.
Ideal for aerospace, drivers/electrical machines, military, manufacturing and utility use, the DO4A can be used to measure low resistance levels from 40mΩ to 4kΩ with 6 ranges and long scale length. Up to 10μΩ resolution on the 40Ω range ensures your measurements are as precise as possible.
Seaward Cropico's DO4A is designed as a truly portable instrument. Equipped with a carrying handle, you can easily port the instrument from test to test and then prop it up as a bench-based instrument using the same handle. It's also powered by rechargeable batteries which give up to 14 hours of continuous operation, with the ability to still use full measurement capabilities even when the ohmmeter is charging from mains connection.
Additional features of this digital ohmmeter include a 4000 count display, zero control thermal EMF compensation, open circuit lead warning and universal mains supply compatibility (100,200, 220 and 220V).
Seaward Cropico DO4A Portable Digital Ohmmeter Key Features
- Precise, portable digital ohmmeter with integrated carrying handle - ideal for field or bench use
- True 4 wire measurements eliminate the effects of test lead resistance
- 6 push button ranges from 40mΩ to 4kΩ with long scale length
- 10μΩ resolution on 40mΩ range
- Input protection up to 415V rms
- Zero control thermal E.M.F compensation
- Digital calibration
- Mains/rechargeable battery operation with life of up to 14 hours
- Keep using full measurement capabilites even when the unit is charging
- Open circuit lead warning
- Rugged industrial maintenance free design
- Universal mains supply compatibility - 100, 200, 220 and 240V
- Overrange and low battery indication
What's Included?
- Seaward Cropico DO4A Portable Digital Ohmmeter
- Test Leads
- Mains Cord
- Operating Instructions
Optional Accessories
If you would like to purchase any of these extras please call our sales team quoting the part number for price and availability.
| Code | item | Part Number |
|---|---|---|
| HS01 | Duplex handspikes with 3m lead length | 190082 |
| HS02 | Duplex handspikes with 3 and 15m lead length | 190055 |
| LS03 | Lead set with 2 x 3m leads terminated in large Kelvin clips type KC3 | 190042 |
| LS04 | Lead set with 3 and 15m lead length terminated in large Kelvin clips type KC3 | 190046 |
| LS05 | Lead set with 4 x 1m leads terminated in banana plugs, 4 x crocodile clips, 4 x test probes and 2 x Kelvin clip type KC1 | 190004 |
| LS06 | Lead set with 1m leads terminated in miniature Kelvin clips type KC2 | 190007 |
| MTS2 | Calibration Standard | 930241 |
Seaward Cropico DO4A Technical Specifications
| Range | Resolution | Typical Current | Accuracy @20°C ±5°C 1 Year | Temperature Coefficient (°C) |
|---|---|---|---|---|
| 4kΩ | 1Ω | 100μA | ±(0.05% Rdg + 0.02% FS) | 30ppm Rdg + 1ppm FS |
| 400Ω | 100Ω | 1mA | ±(0.05% Rdg + 0.02% FS) | 30ppm Rdg + 1ppm FS |
| 40Ω | 10Ω | 10mA | ±(0.05% Rdg + 0.02% FS) | 30ppm Rdg + 1ppm FS |
| 4Ω | 1mΩ | 10mA | ±(0.05% Rdg + 0.03% FS) | 30ppm Rdg + 4ppm FS |
| 400mΩ | 100μΩ | 10mA | ±(0.05% Rdg + 0.05% FS) | 30ppm Rdg + 25ppm FS |
| 40mΩ | 10μΩ | 100mA | ±(0.05% Rdg + 0.05% FS) | 30ppm Rdg + 25ppm FS |
| Additional Specifications | ||||
| Measurement | 4 terminal Kelvin/Thomson principle eliminates errors due to lead resistance | |||
| Display | 15mm LCD 4000 count with automatic decimal point and polarity indication | |||
| Ranges | 6 push button selected with LED indication | |||
| Terminals | 4mm binding posts accept spade tags and 4mm banana plugs | |||
| Mains Supply | 100, 120, 220 and 240V +10 to 13% 47 to 63Hz 20VA |
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| Safety | EN 61010-1 EMC 61326 |
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| Calibration | Digital security key protected | |||
| Auto Zero | Permits the automatic zero of amplifiers and external circuits, eliminating errors due to thermal EMF | |||
| Protection | 415V rms maximum at the measuring terminals will blow internal protection fuse | |||
| Battery | 6V, 2.8Ah sealed lead acid battery with built-in charger. 14 hour typical operating time on lowest range, 28 hours typical on other ranges. Internal charger and automatic switch off | |||
| Dimensions | 15 x 250 x 88mm (w x d x h) approx | |||
| Weight | 3.5kg | |||
| Working Temperature | 0 to +40°C with relative humidity 80% max non-condensing | |||
| Storage Temperature | -20 to +50°C | |||
| Warranty | 1 year (subject to registration with Seaward) | |||
| SKU | DO4A |
|---|---|
| Manufacturer Part Code | 930127 |
