TB 9-6625-2335-35
IDENTIFICATION AND DESCRIPTION
calibration of Multimeter, Hewlett-Packard, Model 3457A. The manufacturer's manual
was used as the prime data source in compiling these instructions. The equipment being
calibrated will be referred to as the TI (test instrument) throughout this procedure.
a. Model Variations None.
hours, using the dc and low frequency technique.
prescribed by TB 750-25.
b. All software adjustments made are reportable. Report software adjustments
made using parameter and range failing performance check; i.e., 3 V dc, 300 V ac.
pertain to this calibration are listed in table 1.
Test
instrument
parameters
Performance specifications
Accuracy: (% of reading + No. of counts)1
Dc volts
Range
30 mV
0.0045 + 385
300 mV
0.0035 + 40
3V
0.0025 + 7
30 V
0.0040 + 20
300 V
0.0055 + 7
Accuracy: (% of reading + No. of counts)1
Dc current
Range
300 A
0.04 + 104
3 mA
0.04 + 104
30 mA
0.04 + 104
300 mA
0.08 + 204
1A
0.08 + 604
