STS 1656 - Model 1651 and 1652 Readings Versus 1656 and 1657; Figure 4-3: Controls no Longer Required

1656 & 1657 Battery Element Tester Owner’s Manual
STS Instruments Page 25 of 88
4.4 Model 1651 and 1652 Readings versus 1656 and 1657
Operators familiar with prior generation Battery
Element Tester, specifically models 1651 and 1652
should familiarize themselves with the enhanced
1656/1657 measurement results as displayed on
the 1656/1657 screen. Unlike the relative Q
factor reading obtained from the analog
measurement systems used in older BET’s, the
1656/1657 is capable of accurately reporting the
reflected EMF pulse amplitude resulting from the
unit under test connection. This makes it
unnecessary to have a balance adjustment and
impedance preset switch for 100 Ohm or 250 Ohm
expected impedance of the EUT, as was the case
on the analog models.
Rather than a relative “down-scale” negative Q
reading as used on older models, the 1656/1657
will display actual absolute peak voltage value
information (positive number). Thus, values displayed on older BET models and the 1656/1657
are not directly comparable. Instead, new upper and lower limit acceptance test levels should
be established empirically for any given type battery cell to be tested.
Figure 4-3: Controls no longer required