Endress+Hauser2
KA651F/00/a2/09.10
Exchange of on FMG60NaI-crystal sensor assembly
Final testing
After an exchange or repair, a final high potential test must be performed at the FMG60.
This requires a high potential tester with the following characteristics:
• adjustable output voltage 500 V AC ... 2.5 kV AC or 800 V DC ... 3.5 kV DC
• trigger current 2.5 mA, discharge time 1,5 seconds
• rise time for test voltage 2 seconds
Before a high potential test is performed, the connections between the PE terminals and housing must be tested with an Ohm-meter for
minimal transient resistance (= 0,1 ). All signal circuits must be shortened with wire jumpers at the terminals of the FMG60 (see
illustrations).
Preparation for testing:
Test procedure for instruments with HART electronics 4...20 mA
W
•
•
he instrument has to be placed isolated, without ground conncection (Z).During final testing t
After each step, the PE connector must be shortened with terminals 1, 2 (power supply) in order to discharge
internal capacitors.
+-
+-+-
IN CASCADE OUT
DISPLAY
SIM WP
Pt100
OFF
ON
3
4
56
7
8
9
10
11
12
13
L1
L+
N
L-
+
-
1
2
(3)
(4)
15
Z
AB
D
14
Z
C
,
,
,
Terminal
compartment A
Holding time>2s
Holding time>2s
Holding time>2s
Holding time > 60 s
1. Testing2. Testing
3. Testing
4. Testing
remove jumper 2-(3)
5. Testing
remove jumper 6-7
+-
+-+-
IN CASCADE OUT
DISPLAY
SIM WP
Pt100
OFF
ON
3
4
56
7
8
9
10
11
12
13
L1
L+
N
L-
+
-
1
2
(3)
(4)
15
Z
AB
D
14
Z
C
+-
+-+-
IN CASCADE OUT
DISPLAY
SIM WP
Pt100
OFF
ON
3
4
56
7
8
9
10
11
12
13
L1
L+
N
L-
+
-
1
2
(3)
(4)
15
Z
AB
D
14
Z
C
Note: To perform the following testings remove the jumpers2-3and6-7.
Terminal
compartment B
Holding time>2s
Terminal
compartment A
Terminal
compartment B
600 Veff
848 V=
>340kW
2.3 kVeff
3.25 kV=
1.3 MW
1.5 kVeff
2.12 kV=
>850kW
600 Veff
848 V=
>340kW
2.3 kVeff
3.25 kV=
1.3 MW
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