Botron Support

Table of Contents
Table of Contents
×

Botron DECABOX Calibration Procedure

Purpose

Performing calibration on the Botron DECABOX to ensure resistor accuracy.

Equipment

  • Botron DECABOX
  • Digital Multimeter (DMM) (a FLUKE 87 is used as reference in this document)
    • Your DMM must be able to test nanosiemens.
    • Please verify the DMM has a current calibration certification.
  • Test leads (2x)
  • 1 7ft RJ45 cable

Readying your DMM

  1. Insert the red test lead into the red port on the FLUKE 87
  2. Insert the black test lead into the black COM port on the FLUKE 87
  3. Turn the FLUKE 87 dial to the continuity test
  4. Turn on audible feedback by pressing the speaker button

Touch the red and black test leads together, an audible beep should emit from the FLUKE 87. The DMM is now ready.

Verifying Continuity

Ground

  • Insert the black test lead into the GROUND banana jack on the DECABOX
  • Using the red test lead, probe the 3rd pin from the left in the RJ45 Footplate port
    • The FLUKE 87 should beep if the DECABOX is properly connected.
  • Using the red test lead, probe the 5th pin from the left in the Ethernet jack
    • The FLUKE 87 should beep if the DECABOX is properly connected.

Left Foot

  • Insert the black test lead into the LEFT FOOT banana jack on the DECABOX
  • Using the red test lead, probe the 4th pin from the left in the Ethernet jack
    • The FLUKE 87 should beep if the DECABOX is properly connected.

Right Foot

  • Insert the black test lead into the RIGHT FOOT banana jack on the DECABOX
  • Using the red test lead, probe the 2nd pin from the left in the Ethernet jack
    • The FLUKE 87 should beep if the DECABOX is properly connected.

Verifying Resistance

Set Up

  • Turn the FLUKE 87 dial to Ohms
  • Insert the black test lead into the GROUND banana jack on the DECABOX

Procedure 10k-10M Loads

  1. Insert the red test lead into the 10k banana jack
  2. Document the resistance value measured by the FLUKE 87
  3. Repeat for 100k, 1M and 10M

Procedure 100M and 1000M (1G Ohm) Loads.

  • Press the RANGE button twice or until the FLUKE 87 displays nanosieman (“nS”)
    • FLUKE 87 dial must be set to Ohms.
  1. Insert the red test lead into the 100M banana jack
  2. Document the resistance value measured by the FLUKE 87
  3. Repeat for 1000M

Calibration Calculation

10k-10M

Calculate the percentage error of the resistance values written down for the 10k, 100k, 1M, and 10M values.

Vm = Value Measured
Va = Value Actual (resistor value)

% Error = | (Vm - Va) / Va | * 100

Percentage error should be no greater than 1%.

100M and 1000M (1G Ohm)

Calculate the percentage error of the resistance values written down for the 100M and 1000M values.

Convert nanosiemens ( nS ) to megohms ( MΩ )

Value MΩ = 1000 / Value nS

Calculate Percentage Error

Vm = Value Measured (Value MΩ)
Va = Value Actual (resistor value)

% Error = | (Vm - Va) / Va | * 100

Percentage error should be no greater than 5%.

Example:

Measuring 100M

Convert nanosiemens to megohms
Vm(nS) = 10.08nS
Value MΩ = 1000 / Vm
Value MΩ = 1000 / 10.08nS
Value MΩ = 99.21MΩ

Calculate Percentage Error
Vm(MΩ) = 99.21MΩ
Va = 100
% Error = | (Vm - Va) / Va | * 100
% Error = | (99.21 - 100) / 100 | * 100
% Error = | -0.79 / 100 | * 100
% Error = | -0.0079 | * 100
% Error = 0.0079 * 100
% Error = 0.79%
Related How To's