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MAINTENANCE
c.
Resistance Accuracy Check.
NORMAL
1.
Select
2.
Select the 1 V O LT SENSITI VITY mode.
Select the 10 5 ohm range.
3.
5 ohms using Resistance
Apply 10
4.
Verify that t h e reading on t h e display is
5 .
within ±6 digits.
6.
Check the remaining ranges in accord with
Table 6-3 ,
TABLE 6 - 3.
Resistance Accuracy Check
Source
Source
10 5 "
10 5 "
±0.05%
10 6 "
10 6
±0.05%
10 7 n
10 7 "
±0.05%
lO B n
lO B "
±0.2%
±0 .5 %
109 "
109 "
10 10 "
10 10 n
± 0 . 5 %
ll "
l O ll n
l O
to. 5%
10 12 "
10 12 "
±0 . 5%
d.
Current Accuracy Check.
Select N O RMAL mode.
1.
2.
Select 1 V O LT SENSITI VITY.
Select 10- 1 ampere range.
3.
Apply 10 - 1 ampere using Current Source (C).
4.
5.
Verify that the reading on the display is
within ±6 digits.
Source
l O - BA
1 O -9 �
1
10 -
lO - ll A
34
mode.
Source ( B ) .
Display
Reading
Tolerance
x
10 5 "
1. 000
± 6 digits
"
"
x
6
1. 000
10
±6 digits
x
10 7 "
1. 000
±6 digits
x
1. 000
lO B "
±21 digits
x
1. 000
109 "
±Sl digits
x
10 10 "
1. 000
±S1 digits
1.
x
lO ll "
000
± S 1 digits
x
12
1.000
"
10
±S! digits
Coulombs Accuracy Check.
Source
10- 7Q
±0. 5%
10 -8Q
±0. 5%
1 O - 9
S
A
±0.5%
10 -1 Q
±0. 5%
Check the lO- l A to lO - 4 A ranges in accord
6.
with Tab 1e 6-4.
Select FAST mode for verification of IO -S A
7 .
to IO - l lA ranges.
S.
Check the IO - SA to IO - 11 A ranges using Cur
rent Source CD) and (E).
9 .
Verify ranges in accord with Table 6 - 4.
Source
Source
10 - 1 A
±0.05%
10- 2 A
±0.05%
10- 3 A
to.05%
10- 4 A
±0.05%
10- 5 A
±0. 05%
10- 6 A
±0.05%
10' 7 A
±0.05%
10 - 8 A
±0.2%
10- 9 A
±0 . 6%
lO -lO A
±0.6%
10 - ll A
±0 . 6%
e.
Coulombs Accuracy Check.
Select FAST mode.
1.
2.
Select 1 VOLT SENSITI VITY .
3.
Apply an input current in decade steps from
10 - 8 ampere to 10- 11 ampere in accordance with
Table 6-5.
CHECK" switch open.
switch for short period of time. )
4.
Verify that the integration time to reach a
1.000 volt display is 10 seconds ±1/2 second.
TABLE 6 - 5.
Display
Time to
x
1 O - 7 Q
1. 000
10 sees.
x
10- 8Q
L O O O
10 sees.
x
10 - 9
8
1. 000
10 sees.
1 Q
x
10 -
10 sees.
1. 000
TABLE 6 - 4.
Current Accuracy Check.
Display
x
10 - 1 A
10 - 1 A
1. 000
10 - 2 A
x
10 - 2 A
1. 000
x
10 -3 A
10 - 3 A
1. 000
x
10 -4 A
10 -4 A
L O O O
x
5
10- 5 A
10 -
A
1. 000
x
6
10 - 6 A
10 -
1. 000
�
x
10 - 7 A
10 - 7 A
L O O O
x
10 - B A
1. 000
1O =
x
10 - 9 A
1.000
10
x
1O - 10 A
1 O - 10 A
L 000
lO - ll A
x
lO - ll A
1. 000
(Display should read zero with "ZERO
If not, close "ZERO CHECK"
Tolerance
±1/2 se c.
± l / 2 se c.
±1/2 sec.
±l/2 se c.
MODEL
616
Reading
Tolerance
±6 digits
±6 digits
± 6 digits
±6 digits
± 6 digits
A
± 6 digits
±6 digits
A
±21 digits
±Sl digits
A
±51 digits
±Sl digits
ll75
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