TB 9-4935-365-35
IDENTIFICATION AND DESCRIPTION
This bulletin provides instructions for the
calibration of Digital Multimeter, Fluke, Models 8120A and 8125A. The manufacturers'
manuals and or technical manuals were used as the prime data sources in compiling these
instructions. The equipment being calibrated will be referred to as the TI (test instrument)
throughout this bulletin.
a. Model Variations.
Variations among models are described in text, tables and
figures.
b. Time and Technique. The time required for this calibration is approximately 1
hour using the dc and low frequency technique.
prescribed by TB 750-25.
b. Adjustments to be reported are designated (R) at the end of the sentence in which
they appear. Report only those adjustments made and designated with (R).
pertain to this calibration are listed in table 1.
Test instrument
parameters
Performance specifications
Dc voltage
Model 8120A
Range: 0 to 1000 V in 5 ranges
Accuracy: 0.02% of Input + 0.01% of range for 1, 10, 100, and 1000 V ranges;
0.05% of input +0.02% of range for 100 mV range
Model 8125A
Range: 0 to 1000 V in 4 ranges
Accuracy: 0.01 of input + 0.01% of range
Ac voltage and frequency
Range: 0 to 1000 V in 4 (5 for model 8120A) ranges
response
Accuracy: 0.2% of input + 0.05% of range from 50 Hz to 10 kHz; 0.5% of input,
+0.1% of range from 30 to 50 Hz and 10 to 20 kHz
Dc current
Range: 0 to 1000 mA in 5 ranges
(model 8120A only)
Accuracy: 0.1% of input + 0.02% of range
Range: 0 to 10 MΩ in 5 ranges
Model 8120A
Accuracy: 0.02% of input +0.01% of range on 1 to 1000 kΩ ranges; 0.05% of input
+0.01% of range on 10 MΩ range
Model 8125A
Accuracy: 0.05% of input +0.01% of range on 1 to 1000 kΩ ranges; 0.1% of input
+0.01 of range on 10 MΩ range