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Surge Protection
The RI-1210 and RI-1220 are capable of suppressing virtually any instantaneous voltage surge caused
by lightning or commercial power. However, the protection device may be damaged if the over voltage
surge or spike is sustained. The same is true if the device is made to absorb a
direct lightning hit
. The
device in conjunction with the magnetic circuit breaker will protect your valued equipment. But in ex-
treme circumstances, the
protection device
may be damaged. If so, the circuit breaker/power switch will
not stay in the “on” position. If this occurs, your Reference unit must be serviced.
Fuses and Circuit Breakers
The RA-1210 and RA-1220 both utilize magnetic circuit breakers that also function as the power switch.
These ultra-low resistance, noise-free breaker/switches are the finest in the industry. They will not nui-
sance trip under heavy turn-on surges, and will not develop noise with continued use. When the RA
unit’s current capacity is exceeded, they will trip, thus moving immediately to the off position. To reset,
simply lift the switch to the on position. If there’s other internal damage to the RA’s circuitry, the meter’s
internal supply fuse, or a blown Varistor, the breaker will not reset. If this occurs, the unit may need ser-
vicing.
Safety Information
Please read and observe all of the safety and operating instructions before the RA-1210 or RA-1220 is
operated. Retain these instructions for future reference:
•
Do not disassemble or modify in any way. No serviceable user parts inside.
•
Keep away from moisture and extreme humidity.
•
Do not allow liquids or foreign objects to enter the unit.
The RA-1210 and RA-1220 should be serviced by qualified service personnel when:
•
The power supply AC cord has been frayed or cut.
•
Objects have fallen or liquid has spilled into the unit.
•
The unit has been exposed to rain or extreme moisture.
•
The unit will not operate, or function normally, showing a marked change in performance.
•
The unit has been dropped, or its enclosure has been damaged.
•
The power indicator will not light, even after resetting the circuit breaker (power switch).
The RA-1210 and RA-1220 require that the safety ground be utilized from the source AC power to the
input of the Reference unit. This ground connection is necessary for optimum performance. Any at-
tempt to operate the RA-1210 or RA-1220 without the incoming safety ground is considered improper
operation and will invalidate the warranty.
Summary of Contents for RA1210
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