Digital Ohmmeter
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Product Name:
Digital Ohmmeter
Product Model:
DO6
Supplier Name:
shanghai beihan
Brief Introduction
• DO6 Digital Ohmmeter
• Resolution of 100 nano ohm on 2 milli ohm range
• Manual / automatic range selection
• Temperature compensation for copper and brass
Digital Ohmmeter introduction
Digital Ohmmeter
Model:DO6
FEATURES
Covering a wide range of measurements from 1 micro ohm to 200 kilo ohm, the DO6 ohmmeter is a comprehensive ohmmeter with many features incorporated as standard. These benefits include manual and automatic range selection; temperature compensation for copper, referencing the measurement of copper to 20°C; voltage limiting facility for those wishing to measure switch contact resistance to International Standards, the measurement voltage is limited to 20mV. An RS232 serial interface gives full talk / listen capability, making it simple to add to an automated measuring system. Hi / Lo limits may be set over the interface with voltage-free contacts being available on the rear panel. For those wishing to measure inductive circuits e.g. motor windings, a special protection circuit may be initiated thus avoiding any problems that may arise due to induced high voltage.
Key Features
• True 4 wire measurement eliminates lead resistance errors
• 2 push button ranges 2 milli ohm… 200 kilo ohm
• Resolution of 100 nano ohm on 2 milli ohm range
• Manual / automatic range selection
• Temperature compensation for copper and brass
• Thermal E.M.F. compensation
• Dry circuit measurement: 18mV limited
• Open circuit lead warning
• RS232 interface
• Hi / Lo limits
Technical Specification
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Measurement
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4 Terminal Kelvin/Thomson, eliminating lead resistance errors
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Display
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4.5 digit 15mm 7 segment LED with polarity and overload indication. 2 digit 16 segment LED for unit display
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Ranges
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9 ranges manual selection with up/down keys, automatic selection with autorange function
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Auto Zero
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Permits the automatic zero of amplifiers and external circuits
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Temperature Compensation
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Measurement compensated for the following referenced to 20°C:Copper Cu = 3.93%/KBrass Ms63 = 1.50%/KBrass Ms80 = 1.60%/KAmbient sensed with Pt 100 sensor
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Relay Output
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For the pre-selected upper and lower limit values “Too small”,“Correct”, “Too large”Contact load = 30W max 48V 1 Amp
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Dry Circuit Measurement
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In accordance with DIN 41640 part 4 and IEC – 132-1Open circuit voltage limited to 18mV
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Interface
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RS232 25 pin D-Bush talk listen function
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Terminals
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4mm safety sockets
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Working Temperature
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0°C to 50°C rel. humidity 90% max. non-condensing
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Storage Temperature
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-20°C to +60°C
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Mains Supply
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230 Volts +6% - 10%45Hz to 65Hz approx. 30VA
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Safety
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IEC 1010 Protective Class 1
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Dimensions
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255mm x 90mm x 263mm (W D H) approx
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Mass
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5kg approximately
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Resistance Ranges
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Range
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Resolution
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Typical Current
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Accuracy@20°C±5°C/ 1 year
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Temperature Coefficient/°C
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20.000mΩ
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1µΩ
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1A
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±0.05% FS
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＜50ppm
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200.00mΩ
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10µΩ
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100mA
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±0.05% FS
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＜50ppm
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2000.0mΩ
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100µΩ
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10mA
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±0.05% FS
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＜50ppm
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20.000Ω
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1mΩ
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10mA
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±0.05% FS
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＜50ppm
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200.00Ω
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10mΩ
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1mA
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±0.05% FS
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＜50ppm
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2.0000kΩ
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100mΩ
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1mA
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±0.05% FS
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＜50ppm
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2.0000kΩ
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1Ω
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100µA
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±0.05% FS
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＜50ppm
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2.0000kΩ
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10Ω
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10µA
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±0.05% FS
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＜50ppm
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