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Standard Features
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DescriptionMicron DC voltage and current panel meters with a DC signal conditioner board combine high accuracy with high read rate and a wide range of isolated output options for computer interface and control. Accuracy is 99.99% of full scale ±2 counts.
All voltage and current ranges are factory calibrated, with calibration factors for each range stored in an EEPROM on the signal conditioner board. This allows ranges and signal conditioner boards to be changed in the field without recalibrating the meter.
Digital filtering is selectable for electrically noisy environments, including a batch averaging filter and an adaptive moving average filter which provides a choice of 8 time constants from 80 ms to 9.6 s. When a significant change in signal level occurs, that filter adapts by briefly switching to the shortest time to follow the change, then reverts back to the selected time constant. In a selectable Auto filter mode, the filter time constant is automatically selected based on detected signal noise. An isolated 5, 10 or 24 Vdc isolated excitation output is standard to power external transducers and transmitters. In many cases, this output can eliminate the need for an external power supply. Designed for flexibility. Plug-in Isolated Analog Output, Dual or Quad Setpoint Controller, and Serial Communications boards can upgrade Microns from a simple monitor to system interface and control. Microns may be powered from 85-264 Vac or optionally from 12-30 Vac or 10-48 Vdc. They are available with red or green LEDs. The 1/8 DIN Case meets NEMA 4X (IP65) specifications from the front when panel mounted. Any setup functions and front panel keys can be locked out for simplified usage and security. |
DC Voltage
DC Voltage Range |
Resolution |
Input Ohms |
Error at 25°C ±2 counts |
| 200.00 mV 2.000 V 20.000 V 200.00 V 600.0 V * 300.0 V |
10 µV 100 µV 1 mV 10 mV 100 mV 100 mV |
1 G 1 G 10 M 10 M 10 M 10 M |
0.01% FS 0.01% FS 0.01% FS 0.01% FS 0.02% FS 0.02% FS |
| * Range does not include U/L certification. |
DC Current
DC Current Range |
Resolution |
Input Ohms |
Error at 25°C ±2 counts |
| 2.0000 mA 20.000 mA 200.00 mA 5.000 A |
0.1 µA 1.0 µA 10 µA 1.0 mA |
100 10 1 0.01 |
0.01% FS 0.01% FS 0.01% FS 0.04% FS |
DC Voltage & Current
Display |
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Readout Range Indicators |
5 LED digits, 7-segment, 14.2 mm (.56"), red or green. -99999 to 99999 or -99990 to 99990 (count by 10) Minus sign, 2 red LED lamps |
A-to-D Conversion |
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Technique A-to-D Rate Output Update Display Update |
Concurrent Slope™ (Pat 5,262,780) 60/s at 60 Hz, 50/s at 50 Hz 56/s at 60 Hz, 47/s at 50 Hz 3.5/s at 60 Hz, 3/s at 50 Hz |
Accuracy |
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Error at 25°C Span Tempco Zero Tempco |
0.01% FS ± 2 counts (except 5A range) 0.003% of reading/°C 0.1 count/°C |
Noise Rejection |
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CMR, DC to 60 Hz NMR at 50/60 Hz |
130 dB 90 dB with min filtering |
Maximum Signal |
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Max applied voltage Current protection |
600 Vac for 20, 200 and 300 V ranges, 125 Vac for other ranges 25x for 2 mA, 8x for 20 mA, 2.5x for 200 mA, 1x for 5 A |
Power |
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Voltage, standard Voltage, optional Frequency Power Isolation |
85-264 Vac or 90-300 Vdc (DC operation not UL approved) 12-30 Vac or 10-48 Vdc DC or 47-63 Hz 250V rms working, 2.3 kV rms per 1 min test |
Excitation Output (standard) |
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5 Vdc 10 Vdc 24 Vdc Output isolation |
5 Vdc ±5%, 100 mA 10 Vdc ±5%, 120 mA 24 Vdc ±5%, 50 mA 50 Vdc to meter ground |
Analog Output (optional) |
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Output levels Current compliance Voltage compliance Scaling Resolution Isolation |
4-20 mA, 0-20 mA, 0-10V, -10 to +10V (jumper selectable) 2 mA at 10V ( > 5 kOhm load) 12V at 20 mA ( < 600 Ohm load) Zero and full scale adjustable from -99999 to +99999 16 bits (0.0015% of full scale) 250V rms working, 2.3 kV rms per 1 min test |
Dual or Quad Contact Relay Outputs (optional) |
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Relay Type Load Rating Isolation |
Form C, SPDT 8A at 250 Vac or 24 Vdc 250V rms working, 2.3 kV rms per 1 min test |
Dual or Quad Solid State Relay Outputs (optional) |
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Relay Type Load Rating Isolation |
Form A, SPST, normally open 130 mA at 140 Vac or 180 Vdc 250V rms working, 2.3 kV rms per 1 min test |
Serial Data I/O (optional) |
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Board Selections Protocols Data Rates Digital Addresses Isolation |
RS232, RS485, Modbus RS485, USB, USB-to-RS485 converter Modbus RTU, Modbus ASCII, simpler Micron ASCII 300 to 19200 bps 247 (Modbus), 31 (Micron ASCII), 250V rms working, 2.3 kV rms per 1 min test |
Signal Connections |
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Environmental |
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Operating Temp. Storage Temp. Relative Humidity Protection |
0°C to 60°C -40°C to 85°C 95% at 40°C, non-condensing NEMA-4X (IP-65) when panel mounted |
External current shunts are fully supported. Scaling from full-scale millivolts, such as 50 mV or 100 mV, to amperes is easily accomplished from the front panel of the meter. The scalable readout is five full digits up to ±99,999 counts.
High read rates at up to 60 or 50 conversions per second while integrating the signal over a full power cycle are provided by Concurrent Slope (US Pat 5,262,780) analog-to-digital conversion. High read rates are ideal for peak or valley capture, real-time computer interface, and control. Peak and valley values are automatically captured. These may be displayed via a front panel pushbutton command or a control signal at the rear connector, or be transmitted as serial data.