CM2015 Periodic Verification Tool


MRO Essentials

Constant Monitor

Many In Stock

CM2015 Periodic Verification Tool quickly and accurately verifies the calibration of the Ranger Series dual wire resistance constant monitors.

The CM2015 Periodic Verification Tool is a resistance box with fixed 5% precision resistors. Resistance decade boxes can quickly and accurately simulate resistance for testing the accuracy of ESD testers and meters.

  • Periodic Verification Tool for the Resistance Ranger Constant Monitors
  • Quickly Verify That Constant Monitors are Calibrated and Operating according to Specifications
  • Resistor Box Containing 5% Fixed Precision Resistors

What is Resistance?

Resistance is the opposition to the passage of an electric current through an electrical conductor. Measured in ohms, and defined by Ohm’s Law as equal to voltage divided by current, resistance is one of the most basic of electrical measurements.


The Ranger Series Constant Monitor is factory calibrated and does not need to be calibrated. But periodically the CM2015PV unit can be used to verify that the Ranger Series Constant Ground Monitors are in proper working order.  The CM2015PV meter is factory calibrated and contains fixed resistors and does not require re-calibration.


MRO Essentials ships via the following companies:

  • UPS
  • FedEx
  • USPS
  • DHL (International Only)
  • LTL Freight: Various Carriers

  • Quick Ship by MRO Essentials

     At, we are on a mission to delivery quality products to you quickly. That is our value proposition. We offer quick turnaround times for purchase orders and same day shipping.  Place an order after 3:30pm Eastern?   It will ship the next day.

    All shipments are FOB FACTORY. Purchaser is therefore responsible for both shipping charges and damage to goods in transit. Note that freight charges are based on weight AND volume. Assembled items take up a greater shipping volume and are typically charged at a higher freight rate than items shipped flat. Purchaser must specify a freight carrier at time the order is placed or MRO Essentials will choose a carrier and prepay shipments. The freight cost of prepay shipments will be added to each invoice unless otherwise specified. NOTE: Request to ship UPS 1st, 2nd, or 3rd day is a method of shipment and does not imply any expediting of order processing by MRO Essentials. For non-UPS shipments, the order will be shipped freight collect or third party billing at purchaser’s option. Purchaser is responsible for and agrees to pay (1) charges disallowed or billed back to MRO Essentials by third parties when purchaser has specified third party billing and (2) charges billed to MRO Essentials for corrections made by the carrier including address corrections. Some carriers may not be available to be used by MRO Essentials. Purchaser will be notified if an alternate carrier is required.

    MRO Essentials products are manufactured in various locations. Shipping points may vary and may change without prior notice.

    You are responsible for your shipment once it leaves the F.O.B. point. We recommend that you insure all shipments. It is our policy to insure shipments unless otherwise specified. The buyer is responsible for uninsured lost or damaged shipments.

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