Simpson Electric Meters

Technical Frequently Asked Questions

  1. What do I need to know before I contact Technical Support to choose a meter? 
    For analog meters –
     electrical input, dial data, size, shape, quantity, and any additional features required 
    For digital meters – input, size, how many digits, power supply, special scaling required, quantity, and any additional features required.
  2. What is a current transformer? 
    A current transformer is commonly used when AC current levels to be monitored exceed 75 amperes. It produces a 5 amp output for each primary range. The transformer provides additional isolation from the conductor. 
  3. If I am measuring over 15 feet between a transformer and display unit, what do I do? 
    You can use a 186 current transformer that converts a current signal to a 0-10ACV signal. This signal can be easily transmitted to a remote location with little voltage drop. 
  4. How do I wire up an analog panel meter? 
    If the meter is monitoring current, you wire it up in series. If it’s monitoring voltage, you wire it up in parallel. 
  5. How do I order digital panel meters?
    Digital panel meters are custom ordered to fit your application. Please contact the factory if you need assistance. 
  6. On digital panel meters, what does 3.5 and 4.5 digits mean? 
    Digits are a measure of the display span of a panel meter. 
    3.5 digit is 199.9 
    4.5 digit is 1999.9