5 Measurement of spark-gap breakdown voltage at DC
Мeasurement range
100 to 3000 V
Accuracy
(5% + 10 digits)
6 Continuity measurement
Мeasurement range
0.01
Ω
to 9.99 k
Ω
Мeasurement range as per IEC 61557-4
0.13
Ω
to 10 k
Ω
Accuracy
(3% + 3 digits)
Test current
200 mA (0 - 10 Ω);
Measurement voltage at open sockets, V
11 to 14
7 Complementary errors
Maximum permissible complementary error of measurement of AC voltage, insulation resistance, continuity,
varistor voltage and spark-gap breakdown voltage due to temperature change within the operating range,
1.5%
Maximum permissible complementary error of measurement of AC voltage, insulation resistance, continuity,
varistor voltage and spark-gap breakdown voltage due to ambient air relative humidity change within the
operating range, 5 %
1.3 General specifications
1.3.1 Nominal current of an instrument at measurement of insulation resistance as per IEC
61557-2 is not less than 1 mA.
1.3.2 Instrument ensure automatic switching of measurement ranges and
measurement units determining.
1.3.3
Upon switching off, the megohmmeters save the last measurement settings,
and restore them when switched on.
1.3.4 Instrument stores up to 10000 measurement results with the possibility of data
exchange with PC using specialized program
“
RS-terminal
”
.
1.3.5 Supply voltage range is from 7.5 to 5.2 V. 7 Instrument provides self-check of
supply voltage. At voltage decrease from 5.2 V to 5.0 V the megohmmeters are switched off.
1.3.6 Power supply is from nickel-metal-hydride (Ni-Mh) storage battery with
“
6 V
”
rated voltage,
“
2000 mA/h
”
capacity or from five replaceable AA power components placed
in a battery compartment. It is allowed to use five AA batteries of 1.2 V rated voltage.
Consumption power is 6,5 W max.
1.3.8 Instrument has a storage battery charging mode, which is automatically
switched on when the power supply is connected. Charging process is shown on the
display. Instrument provides protection from incorrect connection of storage battery and
overcharge.
1.3.10 Instrument’s continuous operating time at resistance measurement during
cycle operation: measurement
–
1 minute, pause
–
2 minutes, is minimum 5 hours.
Table 1 –
Basic metrological characteristics
4
