Amprobe AMB-50 Insulation-Resistance-Tester - Manual (Page 17)

11
Detailed Accuracy Specifications
Accuracy: ±([a% of reading] + [number of least significant digits]), guarantee for 1 year.
Operating temperature: 18°C ~28°C
Relative humidity: 45~75%RH
A. Voltage Measurement
DC Voltage AC Voltage
Measurement Range ±30 ~ ±600V 30V~600V (50/60Hz)
Resolution 1V
Accuracy ±(2%+5) Among them 30~100V(50/60Hz)±(2%+8)
B. Nsulation Resistance Measurement
Output
Voltage
500V 1000V 2500V 5000V
Display
Range
0.5M e ~20G e 2M e ~40G e 5M e ~100G e 100M e ~1000G e
Open Circuit
Voltage
DC 500V 0%~+ 20% DC1000V 0%~+ 20% DC 2500V 0%~+ 20% DC5000V 0%~+ 20%
Test Current 1mA~1.2mA @ 500k e 1mA~1.2mA @ 1M e 1mA~1.2mA @ 2.5M e 1mA~1.2mA @ 5M e
Accuracy
0.50M ~99.9M : ± (3%+5)
100M ~9.99G : ± (5%+5)
10.0G ~20.0G : ± (10%+5)
2.0M ~99.9M : ± (3%+5)
100M ~9.99G : ± (5%+5)
10.0G ~40.0G : ± (10%+5)
5.0M ~99.9M : ± (3%+5)
100M ~9.99G : ± (5%+5)
10.0G ~100G : ± (10%+5)
10.0M ~29.9M : (For
reference only)
30.0M ~99.9M :
± (3%+5)
100M ~9.99G : ± (5%+5)
10.0G ~99.9G : ± (10%+5)
Above 100G : [ ± (20%+5)
Humidity:Below 50%]
Short Circuit Less than 2.0mA
� OPERATING CAUTION
At any output voltage, when the tested resistance is les than 10M , the testing time cannot
exceed 10 seconds continuously.
MAINTENANCE AND REPAIR
If there appears to be a malfunction during the operation of the meter, the following steps should
be performed in order to isolate the cause of the problem.
1. Check the battery. Replace the battery immediately when the symbol “N” appears on the
LCD.
2. Review the operating instructions for possible mistakes in operating procedure.
Except for the replacement of the battery, repair of the meter should be performed only by a
Factory Authorized Service Center or by other qualified instrument service personnel. The front
panel and case can be cleaned with a mild solution of detergent and water.Apply sparingly with a
soft cloth and allow to dry completely before using. Do not use aromatic hydrocarbons, Gasoline or
chlorinated solvents for cleaning.
• Periodically wipe the case with a damp cloth and mild detergent. Do not use abrasives or
solvents.
• To clean the terminals with cotton bar with detergent, as dirt or moisture in the terminals
can affect readings.