well as for guarding in the volts and ohms modes. Connec-
tions and equivalent circuits for the preamp output are shown
in Figure 2-16. Full range outputs for various functions and
ranges are listed in Table 2-6. The PREAMP OUTPUT is not
corrected during calibration. Gain errors of up to 3% may
appear at this output, depending on function and range selec-
tion. For all volts ranges, PREAMP OUTPUT accuracy is
typically Sppm.
Table 2-5. Typical 2V Analog Output Values
ZV Analog
Output Value
1.04v
1.65V
1.4 v
0.35v
1.75v
0.95v
1.25V
1.9 v
00
n/o
cl
\
MODEL 617
RF = 2MR IX101
200kR ,X1)
20kR 1X0.11
2kR lXO.01 I
Table 2-6. Full Range PREAMP OUT Values
_-.--
I
200mV
200mV
2 v
2v
Amps
Ohms*
20 v
,
200 v
2~4 2nA, 2/ln, 2mA.
20pA. 20nA. 20& 20mA
200pA, 200nA. 2OOfi
2 k0
20kD-2GQ
20GQ
20 v
200 v
200mV
2v
20 v
200mV
2v
20 v
Coulombs 1
200GQ
1 200 v
2OODC
I 200mV
I 2v I
“WARNING: Open circuit voltage of 300V present at
PREAMP OUT in Ohms.
,j-xiiL
-----I
(EXAMPLE: CHART RECORDER1
INPUT FROM
PREAMP
200kR
EQUIVALENT CIRCUIT
Figure 2-15. Typical 2V Analog Output Connections
2-20
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