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The GMC Instruments METRAHIT ULTRA BT M248B ± 310,000 Digits Precision TRMS Multimeter offers all the benefits of the M248A, plus the addition of an integrated Bluetooth remote control.
Click here to view GMC Instruments’ METRAHIT ULTRA M248A ± 310,000 Digits Precision TRMS Multimeter.
| Internal Clock | |
| Time format | DD.MM.YYYY hh:mm:ss,0 |
| Resolution | 0.1 sec. |
| Accuracy | ±1 minute per month |
| Temperature Influence | 50 ppm/K |
| Reference Conditions | |
| Ambient temperature | +23 °C ±2 K |
| Relative humidity | 40 to 75% (no condensation allowed) |
| Meas. quantity frequency | Range: 45 ... 65 Hz |
| Meas. quantity waveform | Sinusoidal |
| Battery voltage | range: 1.8 ... 3.2 V |
| Data Interface – Infrared | |
| Type | Optical via infrared light through the housing |
| Data transmission | Serial, bidirectional (not IrDa compatible) |
| Protocol | Device specific |
| Baud rate | 38,400 baud |
| Functions | – Select/query measuring functions and parameters – Query momentary measurement data – Read out stored measurement data |
| The USB X-TRA plug-in interface adapter (see accessories) is used for adaptation to the PC’s USB port. | |
Data Interface – Bluetooth (M248B only) | |
| Internal Measured Value Storage | |
| Memory capacity | 16 MBit for approx. 300,000 measured values with indication of date and time |
| Power Supply | |
| Battery | 2 ea. 1.5 V mignon cell (2 ea. size AA) Alkaline manganese per IEC LR6 (2 ea. 1.2 V NiMH rechargeable battery also possible) |
| Service life | With alkaline manganese: approx. 200 hrs. |
| Battery indicator | Battery capacity display with battery symbol in 4 segments: Querying of momentary battery voltage via menu function. |
| Power OFF function | The multimeter is switched off automatically: – If battery voltage drops to below approx. 1.8 V – If none of the keys or the rotary switch are activated for an adjustable duration (10 to 59 min.) and the multimeter is not in the continuous operation mode |
| Power pack socket | If the NA X-TRA power pack has been plugged into the instrument, the installed batteries are disconnected automatically. Rechargeable batteries can only be recharged externally. |
| Display Transreflective LCD panel (65 mm x 36 mm) with display of up to 3 measured values, unit of measure, type of current and various special functions. | |
| Background illumination Background illumination is switched off approximately 1 minute after it has been activated. | |
| Digital | |
| Display / char. height | 7-segment characters Main display: 13 mm Auxiliary display: 7.5 mm |
| Number of places | 309,999 steps |
| Overflow display | “OL” is displayed for ≥ 310,000 digits |
| Polarity display | “–” (minus sign) is displayed if plus pole is connected to “⊥” |
| Measuring rate | 10 or 40 measurements per second with the Min-Max function except for the capacitance and frequency measuring functions |
| Refresh Rate | 2 times per second, every 500 ms |
| Acoustic Signals | |
| For voltage | Above 600 V in the 600 V range: intermittent (250 ms on, 250 ms off) |
| For current | – Above 10 A: intermittent signal – Above 16 A: continuous signal – For displayed temperature > 50 °C |
| Fuse | |
| Fuse link | FF (UR) 10 A/1000 V AC/DC, 10 x 38 mm, Switching capacity: 30 kA at 1000 V AC/DC, protects the current measurement input in the 300 μA through 10 A ranges |
| Electrical Safety per IEC 61010-1:2010/VDE 0411-1:2011 | |
| Protection class | II |
| Measuring category | CAT III CAT IV |
| Operating voltage | 600 V 300 V |
| Pollution degree | 2 |
| Test Voltage | 5.2 kV~ |
| Electromagnetic Compatibility (EMC) | |
| Interference emission | EN 610326-1:2006 class B |
| Interference immunity | EN 610326-1:2006 EN 610326-2-1:2006 |
| Ambient Conditions | |
| Accuracy range | 0 °C to +40 °C |
| Operating temperature range TA | –100 °C to +50 °C * |
| Storage temp. range | –25 °C to +70 °C (without batteries) |
| Relative humidity | 40 to 75%, no condensation allowed |
| Elevation | To 2000 m |
| Deployment | Indoors, except within specified ambient conditions |
| * Exception: current > 10 A to 16 A, operation at up to 40 °C | |
| Mechanical Design | |
| Housing | Impact resistant plastic (ABS) |
| Dimensions | 200 x 87 x 45 mm (without rubber holster) |
| Weight | Approx. 0.4 kg with batteries |
| Protection | Housing: IP 52 (pressure equalization by means of the housing) Sockets: IP 20 |
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