Table of Contents
Advertisement
3.7 Insulation Resistance Test
Insulation
resistance tester
crossover wiring
1
FG
12
13
FG
DI-1
23
24
DO-1
DO-1
Remove wiring to connect external circuits
and Connect crossover wiring
Insulation
resistance tester
-
IM 11M12A01-02E
Even if the testing voltage is not so great that it causes dielectric breakdown, testing
may cause deterioration in insulation and a possible safety hazard. Therefore, conduct
this test only when it is necessary.
The applied voltage for this test shall be 500 V DC or less. The voltage shall be applied
for as short a time as practicable to confirm that insulation resistance is 20 M or more.
Remove wiring from the converter and the detector.
1. Remove the jumper plate located between terminal G and the protective grounding
terminal.
2. Connect crossover wiring between L and N.
3. Connect an insulation resistance tester (with its power OFF). Connect (+) terminal to
the crossover wiring, and (-) terminal to ground.
4. Turn the insulation resistance tester ON and measure the insulation resistance.
5. After testing, remove the tester and connect a 100 k resistance between the cross-
over wiring and ground, to discharge.
6. Testing between the heater terminal and ground, contact output terminal and ground,
analog output/input terminal and ground can be conducted in the same manner.
7. Although contact input terminals are isolated, insulation resistance test cannot be
conducted because the breakdown voltage of the surge-preventing arrester between
the terminal and ground is low.
8. After conducting all the tests, replace the jumper plate as it was.
Separate-type Zirconia Oxygen Analyzer, ZR402G Converter
-
+
2
3
4
5
6
AO1
AO1
AO2
AO2
CJ
(+)
(-)
(+)
(-)
(+)
14
15
16
17
18
DI-2
DI-C
AI
AI
AC-
(+)
(-)
ZERO
Contact
input 2
Contact
input 1
Automatic Calibration Unit
25
26
27
28
29
DO-2
DO-2
DO-3
DO-3
DO-4
+
7
8
9
10
11
CJ
TC
TC
CELL
CELL
(-)
(+)
(-)
(+)
(-)
19
20
21
22
AC-
AC-
FG
FG
SPAN
COM
Solenoid valve
Span gas
for automatic
calibration
Solenoid valve for
automatic calibration
Zero gas
30
31
32
33
34
DO-4
HTR
HTR
L
N
crossover wiring
Insulation
resistance tester
-
+
Separate-type Zirconia Oxygen Analyzer,
ZR22G Detector
CELL
CELL
TC
(+)
(-)
(+)
35
36
G
HTR HTR
Remove
jumper plate
3. Installation
TC
CJ
CJ
(-)
(+)
(-)
F3.17E.EPS
3-17
Advertisement
Table of Contents
