Power Supply - AEMC 8500 User Manual

CT Test Mode Ready
Indicates system ready for CT testing
X Circuit: OPEN (or CONT)
Refer to the VT/PT Continuity Test section
H Circuit: OPEN (or CONT)
Refer to the VT/PT Continuity Test section
Low X Signal
Check X cables for inadvertent short circuits.
X winding may be shorted or transformer circuit breaker may be open.
Low H Signal
Check H cables for inadvertent short circuits.
Check H cable connector at DTR front panel.
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4.6

Power Supply

The DTR Model 8500 may be used for up to 10 hours on fully charged
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NiCd batteries. The DTR may also be line supplied during measurements.
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In this mode the DTR also recharges the NiCd batteries.
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LOW BATTERY is displayed when the internal batteries approach low
voltage. When displayed, a limited number of measurements may still
be conducted, though we recommend recharging the DTR as soon as
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possible. If the battery voltage drops too low, the DTR will lock out further
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operation. In the lock-out mode, the DTR shuts down all functions until
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AC power is applied and the battery recharged.
We recommend recharging the DTR overnight. Each time the DTR is
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connected to AC power, a 14-hour recharge cycle begins. Repeat charging
of partially discharged batteries will not result in battery damage. During
the 14-hr cycle, the CHARGING indicator will glow continuously; following
this period, a pulse-trickle charge mode is entered and the indicator will
pulse on and off.
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Digital Transformer Ratiometer DTR Model 8500
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