and 500V phase to phase. The probe is fitted with an internal
non-replaceable fuse to protect the user should the probe be
used accidentally in conjunction with a test lead in the low
terminal.
* Relates to transient overvoltage likely to be found in fixed
installation wiring.
Do not use the probe if any part of it is damaged.
Battery Replacement
When the low battery symbol
appears, the cells are nearly
exhausted and should be replaced as soon as possible. Use
Alkaline cells IEC LR6 (AA) or NiCd rechargeables. To install
or replace the cells, disconnect the test leads, switch the
instrument to OFF and loosen the captive screws on the rear of
the battery compartment. Remove the cover and disconnect
the battery holder from the battery leads. Ensure that the
replacement cells are fitted with the correct polarity in
accordance with the label in the battery holder. Reconnect the
battery holder to the battery leads. Replace and re-secure the
battery compartment cover. Remove the cells if the instrument
is not going to be used for an extended period of time.
Fuse Checking and Replacement
To check the instrument fuse, switch to an insulation range and
press the TEST button. The symbol
will appear if the
fuse is ruptured. To replace the fuse, disconnect the test leads,
switch the instrument OFF and loosen the captive screws
holding the battery compartment cover in place. Remove the
cover and replace the fuse. Replace and re-secure the battery
compartment cover.
SPECIFICATION
(All quoted accuracies are at +20ºC.)
INSULATION RANGES
Nominal Test Voltage(d.c.): 50V, 100V, 250V, 500V, 1000V
Test voltage accuracy:
+20% maximum on open circuit
Short circuit current:
< 2mA
Test Current on load:
1mA at min. pass value of
insulation specified in BS7671,
HD384 and IEC 364, 2mA max.
Accuracy:
Range
Full Scale
Accuracy
1000V
200GΩ
± 2% ± 2 digits 0,2% per GΩ
500V
100GΩ
± 2% ± 2 digits 0,4% per GΩ
250V
50GΩ
± 2% ± 2 digits 0,8% per GΩ
100V
20GΩ
± 2% ± 2 digits 2,0% per GΩ
50V
10 GΩ
± 2% ± 2 digits 4,0% per GΩ
Note: Above specifications only apply when high quality
silicone leads are being used.
Measuring Range:
0,01MΩ to 200GΩ
(100GΩ on analogue scale)
EN61557 Operating range: 0,10MΩ to 1,00GΩ
