Owing to its high measuring rate, its compact and robust design, ist accuracy and long-term stability, the digital ohmmeter MR1012S can be used in applications with high requirements concerning the measuring stability and reliability. This is guaranteed by the integrating measuring method according to the quotient principle, the compensation of all thermoelectric forces and other offset voltages, as well as the suppression of interference voltages in the measuring and data lines induced e.g. by HF.
数字欧姆表MR1012S具有测量速率高、结构紧凑、设计可靠、精度高、长期稳定等优点，可用于对测量稳定性和可靠性提出较高要求的应用。根据商原理的积分测量方法、所有热电力和其他偏置电压的补偿以及抑制测量和数据线中的干扰电压，例如高频引起的干扰电压，都能保证这一点。
| Resistance measurement | |
| Range | 10 mΩ – 100.00 kΩ, decadic |
| Overrange | +80 %, to 18000 |
| Resolution | 1 ;@Range 1 mΩ |
| Condition for Error Specs | @ 10 Measurements / s ; 20/23°C |
| Max. Measurement Error | ± 0.03 % RDG ± 0.02 % RNG |
| Additonal Temperature Error | ± 0.0002 % x (|t| – 20/23°C) RDG |
| Long term Stability | ± 0.002 % / Year RDG |
| Measuring Method | integrating dual slope quotient |
| Object Connection | 4-Pole due to Kelvin |
| Current | 100 ;A (10 kΩ) to 1 A (1, 10 mΩ) |
| Max. Lead Resistance | 2Ω (tested), 3Ω max. @ 1A |
| Range selection | automatically, using keypad, via RS232 |
| Display | LED, 3 ½ or 4 ½ digits, selectable |
| Speed | 5, 10, 20 Measurements per second available |
| Temperature measurement | |
| Programmable Cycles | every 1st to 1000thmeasurement |
| Reference | conversion to 20 °C or 23 °C |
| Temeprature Coefficient | – 9.99 to + 9.99 ‰/K via RS232 or Keypad |
| Inputs | PT 100 probe, or via keypad or RS232 |
| Error detection | prior to EVERY single measurement |
| Current Connection Errors | display: ‚CUR‘, RS232: ‚ECUR‘ |
| Sense Connection Errors | display: ‚SEN‘, RS232: ‚ESEN‘ |
| Overrange > 80% | display: ‚OVL‘, RS232: ‚EOVL‘ |
| Thermoelectric Force Compes. | prior to every single cycle, automatically |
| Limit Values | |
| Input | using Keypad, via RS232 |
| Off-Limit Condition | visible by LEDs, via RS232, via PLC |
| Start of Measurment | using Keypad, via RS232 (pot.free) and IEEE – 488, via PLC (potential free contact), via Foot Switch (optional) |
| Interfaces | RS232C (full device control) PLC (<,=,>,EOC,GO,REM) Printer (parallel, ANSI standard) IEEE – 488 (optional) |
| Environment | Operating: 0° – +50°C, RHD 80% max. Storage: -20°C … +70°C, both not condensing |
| EMC | IEC801-2/-3 , EN55011 |
| Dimensions | 260 x 80 x 240 mm (WxHxD) |
| Weight | approx. 3 kg |
| Multiplexer | within the normal dimensions: This instrument can be expanded to 6/10 measuring channels, 10 with common ground (electronic switches), 6 all separate with six 4- pole relais (Options). For more channels (up to 50) see our MR1012MP. |
