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The M-35 Microminiature Process Meter is the solution when panel space is limited or the size and weight of the indicator must be as small as possible. The bezel measures only 24 x 48 mm (0.94" x 1.89"), yet the height of the red LED digits is a full 10 mm (0.4").
The M-35 is a fully scaleable 3-1/2 digit process meter for DC and process signals. It is powered from 10-30 Vdc, so that it can run off batteries. Power and signal are isolated to 750 Vac to facilitate panel design, with no worries about ground loop errors. A detachable screw terminal connector provides a benefit rarely found on meters of this size.
The 4-20 mA proces signal range and DC voltage ranges from ±2V to ±200V and DC current ranges of 0-20 mA or 0-50 mA are jumper selectable. Zero and span adjustment are easy screwdriver adjustments ar the back of the meter/.
Small size, low weight, and isolated DC power make the M-35 ideal for portable test equipment.
The above diagram for a typical pressure monitoring / manometer application shows how simple the M-35 is to connect. The same DC source powers the transducer and meter. Only three field wires are required.
A removable screw terminal is standard. The connector pin assignments as well as the zero and span adjustments are clearly labeled on the back of the meter.
| Signal | |
|---|---|
| Signal ranges | 4-20 mA, 10-50 mA, 0-10V, 0-200V |
| Input resistance | 181Ω, 68Ω, 188 kΩ, 940 kΩ |
| Scaling method | Zero & span potentiometers |
| A/D conversion | Dual slope integration |
| Accuracy | ±0.2% of range |
| Display | |
| Number of digits | 3-1/2 |
| Display range | ±1999 |
| Display type | Red LED |
| Digit height | 10 mm (0.39") |
| Decimal point selection | Plug-in jumpers behind front panel |
| Electrical | |
| Signal isolation | 750 Vac |
| Power to meter | 10-30 Vdc, 0.6 W |
| Mechanical | |
| Bezel dimensions | 24 x 48 mm (0.94" x 1.89"), H x W |
| Panel cutout | 22.5 x 45 mm (0.89" x 1.77"), H x W |
| Depth behind panel | 68 mm (2.68") including connector |
| Electrical connections | Four screw terminals, detachable connector |
| Weight | 60 g (2 oz) |
| Environmental | |
| Operating temperature | -20°C to 60°C (-4°F to 140°F) |
| Storage temperature | -40°C to 80°C (-40°F to 176°F) |
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