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Digital Panel Meters FAQ
Digital Panel Meters FAQ
Digital Panel Meters
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Digital Panel Meters
Topic: 2-Wire Meter
Q
Do digital 2-wire meters still function when their inputs go to zero?
Q
What happens when the input goes below the minimum specified level?
Q
Why aren't absolute maximum input ratings specified?
Q
What happens when a 2-wire meter's input signal polarity is reversed?
Topic: Meter Display
Q
What exactly is a "half-digit"?
Q
How is the half-digit displayed?
Q
What is a "count," and how is it related to resolution?
Q
How is input polarity displayed?
Q
How do the decimal points function?
Q
I don't want any decimal points enabled, what do I do?
Q
Are low-power red LED meters dimmer than standard-intensity meters?
Q
Do I need a 3½ or a 4½ digit meter?
Topic: Process Monitor
Q
Why does my process monitor's display reading stay fixed at "000" as the 4-20mA signal is varied?
Q
How do I hook up a +24V supply to a loop-powered DMS-20LCD-4/20S?
Q
What do the 'S', 'B', 'P' and 'I' 4/20 suffixes in DATEL's 4-20mA process monitor part numbers stand for?
Q
How does ambient light affect the selection of a process monitor?
Topic: DC Ammeters
Q
What is a shunt?
Q
What’s the block labeled “LOAD” on your DCA-20PC series data sheet’s connection diagrams?
Q
What do TB1’s ‘-SHUNT’ and ‘+SHUNT’ designations mean?
Q
What’s the function of the block labeled “DC SUPPLY”?
Q
What’s the main difference between ‘–DC1’ and ‘-DC4’ models?
Q
I have a DCA-20PC-X-DC1-RL ammeter which I believe is properly connected to a +12Vdc power supply, but the LED display is totally off (dark). What’s the problem?
Q
Do all of the above questions also apply to your DCA5-20PC series ammeters?
Q
I want to replace an old, 50A analog dc-ammeter with your digital DCA5-20PC-1-DC1-RL. How do I hook it up?
Topic: AC Ammeters
Q
I need to monitor the load current flowing in a 15A circuit. I plan on using your ACA-20PC-2-AC1-RL ac ammeter; do I need to buy anything else?
Q
Can I use the same ac power source that’s powering my load to also supply operating power to your ac ammeters’ TB1 A and B terminals?
Q
Are your ACA5-20PC series ammeters supplied with external current transformers (CT)?
Q
Can I use a combination of one ACA5-20PC ammeter, a 3-position selector switch, and three 5A CTs to monitor current in a 3-phase ac circuit?
Q
Can I remove the built-in CTs on your ac ammeters and then reconnect them remotely?
Q
I need to measure current on a 120V / 400Hz AC supply, which one of your AC ammeters do you recommend?
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