20
PREVENTIVE MAINTENANCE TECHNICAL SPECIFICATION
Clean only with a damp cloth. Do not use any alcohol based cleaning fluids
as they may leave a residue.
General Specification
Only values with tolerances or limits are guaranteed data. Values without
tolerances are for information only.
Voltage measurement
Range: 0 V to 500 V
Accuracy: ±2% ±2 digits
Frequency measurement (LT320 and LT330)
Range: 25Hz to 450Hz
Accuracy: 25.0Hz to 199.9Hz ±0.1Hz
200Hz to 450Hz ±1Hz
Phase rotation indicator (LT320 and LT330)
Three wire identification of phase rotation.
Loop ranges (to EN 61557-3)
3-wire No Trip Loop (Line to Earth)
Supply
(LT310) 100 V - 280 V 45Hz to 65Hz
(LT320 and LT330) 50 V - 280 V 45Hz to 65Hz
Nominal test current: 15mA line to earth
Loop accuracy
0.01 Ω - 9.99 Ω (±5% ±0.03 Ω)
10.0
Ω
- 99.9 Ω (±5% ±0.5 Ω)
100
Ω - 999 Ω (±5% ±5 Ω)
1.00 k
Ω - 2.00 kΩ (±5% ±30 Ω)
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