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SECTION F.2.16
Procedure the Using the 600-MB1 Meter Base Adapters
F.2.16.1. Spinlab 600-MB1 (SP 1850) PLUG-IN METER BASE ADAPTER--
FORM 3S & 4S METERS
The purpose of this document is to present hookup instructions for in-service testing of CT-
metered installations using the Spinlab 600-MB1 Plug-in Meter Base Adapter for Form 3S and
4S meters.
TEST INSTRUCTIONS USING THE 2 BANANA PLUG CABLE
(INSTRUCTIONS FOR THE 3 BANANA PLUG CABLE ON THE NEXT PAGE)
When testing Form 3S and 4S installations, pull the meter and insert the MB1. The hookup
instructions are as follows:
1. FORM 3S: 3 WIRE, 1 CT
To measure Is: Insert duckbill probe into left prong, copper side up.
To measure Vs
12
: Insert red banana plug into #3 and black banana plug into #5.
2. FORM 3S: 2 WIRE, 1 CT, 1 PT
To measure Is: Insert duckbill probe into left prong, copper side up.
To measure Vs
12
: Insert red banana plug into #3 and black banana plug into #5.
3. FORM 4S: 3 WIRE, 2 CT
Line 1 Test Hookup
To measure Is
1
: Insert duckbill probe in left prong, copper side up.
To measure Vs
12
: Insert red banana plug into #5 and black banana plug into #6.
Line 2 Test Hookup
To measure Is
2
: Insert duckbill probe into right prong, copper side up.
To measure Vs
21
: Insert red banana plug into #6 and black banana plug into #5.