SYNCHRONIZABLE
CURRENT INTERRUPTERS
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The
JR-Series Current Interrupters are computer age successors to the CI-30. The use
of a
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microprocessor
plus crystal controlled timing results in a unit which can operate alone or
in precise
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synchronization with any number
of other JR units. This feature facilitates measurement of
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instant-off polarized
potentials. The JR-Series is also well suited for use where more traditional
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current interrupter
applications are required.
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SPECIFICATIONS:
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DISPLAY:
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Custom
LCD, wide operating temperature range (-4๐F to +185๐F)
with enhanced response time at
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extremely low temperatures.
Large (.7 high) digits plus equipment status annunciators.
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LOGIC/RECALL:
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8-bit
CMOS Microprocessor; FPROM operating system.
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CYCLE RANGE:
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Keyboard
Programmable: 0.1 to 999.9 seconds in 1 second increments, either ON or OFF
cycle.
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AUTO TURN-ON:
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Programmable
interrupt start time.
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ACCURACY:
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Timing:
0.5 second maximum variation in 24 hours. Synchronization to within 1 millisecond.
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BATTERY:
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Sealed,
rechargeable with charger.
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NIGHT LATCH:
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The
JR-Series supports 24-hour timing and a scheduled relay closure period. For
example, a night latch
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time of 1700 could be
entered from the keypad, and a start time of 0700. The unit will operate
normally
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until
1700, at which time the relay will close and will stay latched until 0700 the
next morning, then the
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normal interrupt cycle
will begin again. This feature facilitates full CP polarization during hours
when the
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survey crews are absent.
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RELAY:
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JR-1: Latching Type
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35A ®
28 VDC or 125 VAC
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JR-2: Mercury Plunger Type
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100
A @ 48 VDC
100 A @ 120 VAC
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75 A
@ 75 VDC
90 A @ 240 VAC
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50 A
@ 120 VDC
60 A @ 480
VAC
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30 A
@ 240 VDC
40 A @600 VAC
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