LLI Digital Panel Meter

The Low-level Interface unit is a dedicated high-accuracy units to measure “low level” signals (nominal range ± 40 mV) from the external balance. The main function of the Digital Panel Meter module is to convert the analogue input signal and present the conversion result to the front panel display and the Data Bus of the module. The LLI Digital panel meter is a replacement for the obsolete Newport digital panel voltmeter 2400AS.

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Full-scale range: ±59.999 mV
Maximum overdrive: ±25 V
Resolution: 1 μV
Error, relative: ±100 ppm of reading @ 25 °C, 8 h, max.
Error, absolute: ±2.5 μV max.
Input impedance: 1 GΩ min.
Offset current: ±1 nA Typical
Common-mode Voltage: 300 V max.
Supply voltage: 85 - 264 VAC 50 Hz, 10 W max.
Conversion rate: 38 SPS max.
ADC: 24-bit Delta-sigma
Start Conversion: Negative-going edge of Start Conversion Auto-convert with SC held low
Conversion Complete: Low during conversion
Digital output: 20 bits BCD (19 bits plus sign), 5 V TTL level
Remote contro:l Display blanking, also with front panel switch
Calibration controls: FS and offset nulling accessible on rear panel Display 0.55 inch 7-segment and sign indicator
Connector analogue: 1 SAE#SAC15S/1-2 Cinch#250-15-30-170 with key between pins 6/7
Connector digital: 1 SAE#SAC22D/1-2 Cinch#251-22-30-160with key between pins 10/11
Connector pre-amplifier: 1 SAE # SAC 22D/1-2 Cinch#251-22-30-160 no key
Connector power: 1 PHOENIX CONTACT MSTB2,5/3-ST-5,08 PLUG, FREE, R/A, 5.08MM, 3WAY

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