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MODEL 1000N
Measurement Board
A-W
C
B1-B8
8 x 1.5V
C102
2200 µF
B-X
D
+B
A2: End of Scale Ω
R14
8
7.5M
Z8
4
7
R15
1CM7555
6
470K
2
1
C8
3
1µF
15
4/21/2005
R9 10K
R10
9
8
Z2a
15K
10
1/4 TL 084
R39
BP1
R7
1K
C2 C3
22K
1µF
R2
18K
15 12 11 8
2
4
A1
Z1 TL 495
2.2K C1
18 7
5
6
14 1
3
1µF
R3
CR1
1.5K
R5
LM 336
C4
R4
18 K
100K
0.1
Common
µF
Ground
4
A1: Short Circuit
Current Adjustment
C5
10µF
A2
R23
Q2
CR4
47Ω
100Ω
R24
BD52
13
470Ω
1N4002
R25
CR3
LM 336
4.7K
R16
14
R17
100K
R54
10M
5
7
100K
Z2d
R18
6
+ 5V
CR12
150K
1/4 TL 084 R19
BAT42
100K
Jumper
MEGOHMMETER
K
R214
R215
47K
47K
R212
7
K2
2.67M
M
j
R202
R203
9.5M
250K
R204
100K
F
G
CR201
S2
E2
S2
T1
C201
3 17 16
0.1µF
E1
S1
6
H
E
9
10
CR2
R8
MΩ
R211
1N4DC2
150Ω
100Ω
R6
Q1
5
1K
TIP31C
R216
C202
100Ω
1µF
i
MΩ
1
+ 5V
2
8
C6
Z3
10µF
1CL7660
2
4
5
- 5V
C7
3
10µF
Ω
+ P
(9V to 12V)
MΩ
BZV
CR7
.15V
S
R27
1K
R26
0.09Ω
+P
R55
R20
2.2K
A3: 0.1Ω Adjustment
100K
R21
Q3
BC 307B
22K
Main Board
R22
16
10R
I
Bz1
J
33
REV. 7: March 13, 2004
FILE LOCATION: Manuals - Cal. Man - 1000MAN.DOC
K1
K3
N
R213
294K
h
R12
9
249K
C203
1µF
R11
CR8
13
14
Z2b
24.9K
12
R210
1N4148
l
1/4 TL 084
M
R204
R205
R206
R207
R208
R209
150K
50K
10K
15K
2.4K
22.6K
High Voltage Board
50V
100V
250V
500V
1000V
MΩ
MΩ
MΩ
MΩ
GΩ
GΩ
GΩ
GΩ
GΩ
h
+B
C9
CR5
100pF
1N 4148
7
50Ω
100Ω
8
3
1
6
LM 308 R
MΩ
Z4
GΩ
GΩ
2
8
4
R13
240K
50V
100V
250V
500V
1000V
GΩ
MΩ
GΩ
MΩ
MΩ
GΩ
MΩ
GΩ
R53
22K
+ B
CR6
10V
+ 5V
+ 5V
+ B
R33
1K
+ B
R28
R29
R30
40.2K
100K
A3
CR9
10K
1M
4
3
R32
Q4
1
Z2c
BC 184C
2
22K
- 5V
1/4 TL 084
11
R31
49.9K
- 5V
*Changes on New Board (525112V00A)
Q2 - BD 140 (80V - 1.5A)
C9 - Not Used
NOTE:
Z4 and Z7 were replaced by OP07C
Remove C9 and C20
CAT. #185.100
m
e
f
1mA
Q
KΩ
g
CR13
1mA
KΩ
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