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#550 DIGITAL INSULATION TESTER
INSTRUCTION MANUAL
SAFETY INFORMATION
Read the following safety information carefully before attempting to operate or service the meter.
To avoid damaging the instrument, do not apply signals which exceed the maximum limits shown in the
technical specifications tables.
Do not use the meter or test leads if they look damaged. Use extreme caution when working around bare
conductors or bus bars.
Accidental contact with the conductor could result in electric shock.
Use the meter only as specified in this manual; otherwise, the protection provided by the meter may be
impaired.
Read the operating instructions before use and follow all safety Information.
Caution when working with voltages above 60V DC or 30V AC RMS. Such voltages pose a shock hazard.
Before taking resistance measurements or testing acoustic continuity, disconnect circuit from main power
supply and all loads from the circuit.
Safety symbols:
Caution refer to this manual before using the meter.
Dangerous voltages.
Meter is protected throughout by double insulation or reinforced insulation.
When servicing, use only specified replacement parts.
CE
Comply with EN-61010-1
1. SPECIFICATIONS
1-1 General Information
Environment conditions:
①
Installation Categories II
②
Pollution Degree 2
③
Altitude up to 2000 meters
④
Indoor use only
⑤
Relatively humidity 80% max.
⑥
Operation Ambient 0~40ºC
Maintenance & Clearing:
①
Repairs or servicing not covered in this
manual should only be performed by qualified personnel.
②
Periodically wipe the case with a dry cloth. Do not use abrasives or solvents on this
instrument.
Display:
Large LCD with dual display
Measurement Range: 200
Ω
, 200k
Ω
, 200M
Ω
/250V, 200M
Ω
/500V,
2000M
Ω
/1000V, 750V/ACV, 1000V/DCV.
Sampling Rate: 2.5 times per second.
Zero Adjustment:
Automatic adjustment.
Over Range Indicator: Number 1 of highest digit is displayed.
Low Battery Indication: The “ “ symbol is displayed when the battery
voltage becomes too low.
Operating Temperature: 0ºC to 40ºC (32ºF to 104ºF)
