{"id":350,"date":"2012-11-07T16:16:12","date_gmt":"2012-11-07T23:16:12","guid":{"rendered":"http:\/\/blog.circuitspecialists.com\/?p=350"},"modified":"2024-01-04T22:12:29","modified_gmt":"2024-01-05T05:12:29","slug":"using-the-cx101bg-digital-panel-meter-dpm","status":"publish","type":"post","link":"https:\/\/www.circuitspecialists.com\/blog\/using-the-cx101bg-digital-panel-meter-dpm\/","title":{"rendered":"Using the CX101BG Digital Panel Meter (DPM)"},"content":{"rendered":"

The CX101BG Digital Panel Meter<\/a> from Circuit Specialists is an easy to use DPM
\nused in any system where the Power source and measured voltage share a
\ncommon Ground connection. Unlike its counterpart, the CX101A, this DPM
\ncannot be used with the Voltage divider PCB CX-ADD ON Board. This application
\nnote will provide instructions on how to use this DPM for different voltage ranges.<\/p>\n

Like all Digital Panel Meters<\/a>, the full scale range of this DPM is 200 mv full-
\nscale. The basic connection is shown in the drawing below. If other full scale
\nvoltage ranges are desired, suitable voltage divider resistors are required. We will
\ndescribe how to calculate these values and provide a table for easy reference.<\/p>\n

To keep the calculated values within a range that is readily obtainable, we will use
\n10 Meg ohms as the maximum series resistor value. We can then calculate the
\n<\/a>
\nshunt resistor for our voltage divider network using the voltage divider equation<\/p>\n

Vout\/Vin=Rshunt\/(Rseries + Shunt)<\/p>\n

shunt resistor value. The results are tabulated below for full scale voltage values
\nof 2 Volts, 20 Volts, and 200 Volts.<\/p>\n

Use Rseries = 10 Meg Ohms for all three ranges.<\/p>\n

For 2 Volts full-scale<\/p>\n

For 20 Volts full-scale Rshunt= 101 K ohms (Use 100 K ohm)<\/p>\n

For 200 Volts full-scale Rshunt= 10.01 K ohms (use 10 K ohm)<\/p>\n

Note that the voltage value displayed on the meter can be fine-tuned by adjusting
\nthe trimmer potentiometer on the back of the DPM. Obviously if 200 mV full scale
\nis desired, Rshunt would not be used and Rseries would be replaced by a direct
\nconnection to pin7.<\/p>\n

This application note has shown how easy it is to determine the Resistor values
\nrequired to utilize the CX101BG Digital Panel Meter<\/a> for various voltage ranges.
\nThe connection diagram is shown below.<\/p>\n

rearranging we can solve for the required<\/p>\n

Rshunt= 1.111 Meg ohms (Use 1.1 Meg Ohm)<\/p>\n

\"\"<\/p>\n","protected":false},"excerpt":{"rendered":"

The CX101BG Digital Panel Meter from Circuit Specialists is an easy to use DPM used in any system where the<\/p>\n","protected":false},"author":42,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"colormag_page_layout":"default_layout","footnotes":""},"categories":[20],"tags":[],"class_list":["post-350","post","type-post","status-publish","format-standard","hentry","category-panel-meters"],"yoast_head":"\nUsing the CX101BG Digital Panel Meter (DPM) | Simply Smarter Circuitry Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.circuitspecialists.com\/blog\/using-the-cx101bg-digital-panel-meter-dpm\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Using the CX101BG Digital Panel Meter (DPM) | 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