LEM A188506510, Руководство по эксплуатации

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9
6 TECHNICAL DATA
General: Microprocessor
controlled, fully automated earth
measuring instrument with additional functions
Measuring function:
interference voltage and frequency, earthing
resistance 3- and 4-pole with / without clip-on
current transformer, resistance 2-pole with AC, 2-
and 4-pole with DC
Display:
4 digit (2999 Digit) - 7 segment liquid crystal
display, digit size 18 mm with supplementary
signs and active illumination.
Operation: Central
rotary switch and function keys
Working temperature range:
-10 °C … +50 °C
Operating temperature range: 0 °C … +35 °C
Nominal temperature range: 18 °C … +28 °C
Storage temperature range: -30 °C … +60 °C
Temperature coefficient:
± 0.1 % of range / Kelvin
Operating errors:
refer to operating temperature range
and RH < 20 RE, RS < 100 RE
The maximum percentage operating error within the measurement range does not
exceed ± 30 % with the measured value as fiducial value, as determined in
accordance with table 6-1 on page 12.
The operating error applies under the rated operating conditions given in IEC1557-1
and the following:
−
injection of series interference voltages with system frequencies of 400 Hz, 60 Hz,
50 Hz, 16
2
/
3
Hz or with d.c. voltage respectively across the terminals E (ES) and
S. The r.m.s. value of the series interference voltage shall be 3 V;
−
resistance of the auxiliary earth electrode and of the probes: 0 to 100 x R
A
but
≤
50 k
Ω
;