14
Agilent L4532A/ 34A Service Guide
1
Specifications
To Calculate Total Measurement Error
The d igitizer s accu r acy sp ecification s ar e exp r essed in t he for m:
( % of r ead in g + % of r an ge ). In ad dition to t he r ead in g er ror an d r an ge er ror,
you may n eed t o ad d add ition al er ror s for cer t ain op er atin g con d ition s. Make
su r e you app ly t he con d ition s as d escr ibed in th e footn otes on t h e sp ecification
p ages.
If you ar e operatin g th e digitizer ou tside t he t emp er atur e r an ge sp ecified ,
ap p ly an add ition al t emp er atu r e coefficien t er ror.
Understanding the " % of reading " Error
Th e r ead in g er ror comp en sates for
in accu r acies t hat ar e d ep en den t u p on th e in p ut sign al level. Th e r eadin g er ror
var ies accordin g t o t he inp u t level on t he select ed r an ge. Th is er ror is exp r essed
in p ercen t of r eadin g. The followin g t able sh ows th e r eadin g er ror ap plied to t h e
d igitizer s
±
8 V inp ut r an ge sp ecification for a n omin al op er atin g temp er atu r e of
23 C 5 C.
Understanding the " % of range " Error
The r an ge er ror comp en sat es for
in accu r acies t hat r esu lt from t he r an ge you select. The r an ge er ror con tr ibu t es a
con st an t er ror, exp r essed as a percen t of r an ge, in dep en d en t of t h e inp u t sign al
level. Th e followin g t able shows t he r an ge er ror ap p lied to t h e d igitizer s
±
8 V
inp ut r an ge sp ecification for a n omin al op er atin g t emp er atu r e of 23 C 5 C.
Temperature Coefficients
Accur acy is usually specified at t he calibr ation t emp er atu r e 23 C 5 C
temp er atur e r an ge. This is a common temper atur e r an ge for many
oper atin g en vir on men ts. You mu st add ad dition al t emp er atu r e coefficien t
er ror s t o th e accur acy sp ecification if you ar e op er atin g th e d igitizer
outsid e th e 5 C temper atu r e r an ge (t he sp ecification is per C).
Range Input Level
Reading Error
(% of reading)
Reading Error
(Voltage)
8 V
8 VDC
0.1
8 mV
8 V
4 VDC
0.1
4 mV
8 V
1 VDC
0.1
1 mV
Range Input Level
Range Error
(% of range)
Range Error
(Voltage)
8 V
8 VDC
0.20
16 mV
8 V
4 VDC
0.20
16 mV
8 V
1 VDC
0.20
16 mV
