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616
MO DEL
6 - 1 .
GENERAL .
This section contains information nec
essary to maintain the inst rument to published speci
fications.
REQUIRED TEST EQUIPMENT.
6- 2 .
for test equipment are given in Tables 6-1 and 6-6 ,
6-3 .
PERFORMANCE VERIFICATION.
procedure to verify proper operation of the instru
ment .
Perfo rmance of the instrument is based on an
operating temperature between 2 0 ° C and 3 0 D e and re
lative humidity less than 70% .
S e t the Line Switch to 1 1 7 o r 234V depending
1 .
on the line power availabl e .
2 .
Fuse Check:
Verify that the appropriate line
fuse is installed.
1 1 I V :
3/16 ampere, 3AG,
234V:
1/10 ampere, 3AG, SLO-8LO (Keithley FU-40)
3 .
Connect the power cord to a variable trans
former which has been set to l17V
2V depending on the line power available.
Connect the shorting link (on the rear panel)
4.
between LO and GROUND.
make certain that the chassis is connected to earth
ground by way of the third conductor on the line
cord or by way of a separate clip lead from GROUND
to earth ground .
Item
A
Voltage Source (DC ) , lOmV
to lOOV in decade steps
(For lOroV range use 10 : 1 divider)
B
Resis ,tance Source, lO
lo 12 n in decade steps
c
Current Source , 10 -l A to
-4
10
A
Current Source, lO- S A -to
D
10 -7
A
E
Current Source,
- l 1
10
A
To verify the accuracy on the IO - S A t o
used with precision resistors having ±O�'02
1175
S E CT I O N
Minimum requirements
Use the following
SLO-8LO (Keithley FU�29)
�
IV
234V ±
O r
For maximum operator safety,
Required Test Equipment for Verification.
S
n to
Ranges
10 - 8 t o
6 .
M A I NT E N A N C E
5 .
Turn the inst rument power on and allow the
instrument to stabilize at amb ient temperature for
a t least 1 / 2 hour.
temperature coefficients can be utilized as neces
sary.
b .
Select NORMAL mode and VOLT function.
1 .
2 .
Select the AUTO SENSITIVITY mode.
3 .
Place ZERO CHECK switch on.
should indicate . 00000 volts.
the front panel ZERO control to obtain a ?ero read
ing with the polarity indicator blinking on and o f f .
Place ZERO CHECK switch o f f .
4 .
5 .
Apply dc voltages t o the input of the Model
616 as given in Table 6-2 using Voltage Source
Source
10 mV
100 mV
V
1
V
10
100
V
TABLE 6 - 1 .
± O . 0 3% accuracy
± O . 05%, lO S n to
± O . 2 % . l o B n
9
± 0 . 5 % , lo
n to
0 . 2 % , 10 - 8 A
0 . 6 % , 10 - 9 A to 1 0 - 1 1 A
NOTE 1 .
range s , a Model 341A should he
accuracy.
Record the tempArature so that
The display
If necessary, adjust
TABLE 6 - 2 .
Voltage Accuracy Check
Source
Display
0 . 03%
. 01000 V
0 . 03%
. 1000
V
0 . 03%
1 . 000
V
0 . 03%
10 . 00
V
0 . 03%
100 . 0
V
Mfr . and Model
Fluke , Model 34lA
GR 1455BH (divider for 10mV)
GR 1 4 3 3 , Keithley Model S155
Fluke , Model 3330B
Fluke, Model 341A, and GR1433
L
See Note
'.
Keithley Model 2 6 1 .
,',j :
�
,�,
MAINTENANCE
(A) .
Reading
Tolerance
±3 digits
±3 digits
±3 digits
±3 digits
±3 digits
33
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