General Specifications
Guaranteed
accuracy period
1 year
Operating
temperature and
humidity
-25
C to 40
C (-13
F to 104
F)
90%RH or lower (non-condensating)
40
C
to 65C
(104
F to 149
F)
, at 65C and below
relative with linear decrease up to 25%
RH
Operating
environment
Indoors, Pollution Degree 2
Altitude up to 2000 m (6562-ft.)
Nominal circuit
voltage
*
600 V AC/DC max.
Storage tempera-
ture and humidity
-25°C to 65°C (-13°F to 149°F)
90%RH or lower (non-condensating)
Degree of
protection
IP40
Maximum rated
voltage to terminal
600 V AC/DC (Voltage measurement)
Maximum rated
voltage to earth
600 V AC/DC, Measurement Category III,
Anticipated Transient Overvoltage: 6000 V
Dielectric strength
7060 V AC, 50/60 Hz, Measurement terminals -
electrical enclosure, 1 min, current sensitivity 1 mA
Power source
Rated supply voltage: 1.5 V DC × 4
LR6 alkaline battery × 4
Maximum rated
power
3 VA
Continuous
operating time
Approx. 20 hours
(Comparator off, backlight off, 500 V range, no load)
Drop proof On concrete: 1 m
Fuse
(Replacements)
FF0.5AH/1000V (70 172 40.0.500: SIBA)
(Very fast acting, arc extinction type, high rupturing
capacity type)
Dimensions
Approx. 159W×177H×53D mm
(6.26”W×6.97”D×2.09”D)
(excluding protrusions)
Mass
IR4056
:
Approx. 600g (21.2 oz.)
IR4057
:
Approx. 640g (22.6 oz.)
(including battery, excluding test lead)
* The nominal circuit voltage refers to the nominal voltage of an electric
distribution circuit that can be measured by this measuring instrument
(based on EN 61557).