Specifications

MIT400 Series CAT IV
Insulation Resistance and Continuity Testers
■
MIT Models 480, 481 and 485 for telecommunication
testing applications also include:
■
75 V live circuit inhibit
■
Cable length by capacitance measurement
(Model 481 & 485)
■
Cable distance in feet or km (Model 481 & 485)
■
Extensive results storage capability – store test date for
later recall (Models MIT420, 430, 481 and 485)
■
Bluetooth download capability – wireless transfer of stored
results to a PC (Models MIT430 and 485)
■
Stylish tapered design and center button placement – easy
to use with either hand
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Each instrument comes complete with:
■
New flexible, long-lasting silicone leads
■
Rugged instrument rubber boot
■
Calibration certificate
■
High-impact polypropylene carry case
■
Three year product warranty
Instrument Safety
The MIT400 Series instruments are designed to meet all of
the requirements of IEC1010-2 and EN61557 and meets the
safety requirements for use on CAT IV 600 V.
Specific safety features include:
■
Any live circuit detection inhibits any insulation testing on
circuits above 50 V (75 volts on Telecom models)
■
Any live circuit detection and test inhibit on continuity
measurements
■
Default display of live circuit voltage on all ranges
■
Detection and inhibit features function even if the
protections fuse has failed
Also, fast detection circuitry prevents damage to the
instruments if accidentally connected to live circuits or across
phases.
Included with every instrument
Each MIT400 Series instrument comes complete with the
following:
■
Set of silicone test leads – Flexible and long lasting,
these leads prevent errors from test lead leakage on high
resistance type of insulation testing. They also provide
increased accuracy above 10 G1.
■
Rugged instrument rubber boot with built-in stand–
Protects the instrument from dings and drops and provides
an easier, better grip of the instrument.
■
Plug-in switch probe – Allows the user to remotely
perform insulation tests, reducing the time taken to
perform a test. Not included with the MIT400 and 40X.
■
High-impact polypropylene carry case – Further protects
the instrument and provides space for the leads, switch
probe, etc.
■
Free calibration certificate (not included with the MIT40X).
■
Owner information CD.
■
Three year product warranty.
SPECIFICATIONS
All quoted accuracies are at +20° C.
Insulation
Nominal test voltages
MIT400 250 V, 500 V, 1000 V
MIT410, 420, 430 50 V, 100 V, 250 V, 500 V, 1000 V
MIT480 50 V, 100 V
MIT481, 485 50 V, 100 V, 250 V, 500 V, 1000 V
MIT40X 10 V to 100 V variable (1 V increments)
Insulation resistance range
MIT400 20 G1
MIT410 100 G1
MIT420, 430 200 G1
MIT480 100 G1
MIT481, 485 200 G1
MIT40X 20 G1
Range Full Scale Accuracy
1000 volts ±3% ±2 digits ±0.2% per G1
500 volts ±3% ±2 digits ±0.4% per G1
250 volts ±3% ±2 digits ±0.8% per G1
100 volts ±3% ±2 digits ±2.0% per G1
50 volts ±3% ±2 digits ±4.0% per G1
10 volts ±3% ±2 digits ±2.0% per 100 M1
Analog range: 1 G1 full scale
Short Circuit Current: 2 mA +0% -50%
Terminal voltage: -0% +20% ±1 V
Test Current on load:
1 mA at min. pass value of insulation specified in BS7671, HD384
and IEC364, 2 mA max.
EN61557 Operating range: 0.10 M1 to 1.00 G1
Leakage Current: 10% ±3 digits
Voltage display: 3% ±3 digits ±0.5% of rated
voltage
Polarization Index (PI): 10 min/1 minute ratio
Dielectric Absorption Ratio (DAR): 60 sec/30 sec ratio
Notes:
(1) All ranges measure from 0.00 M1 upwards.
(2) Above specifications only apply when high quality silicone leads
are being used.
Continuity
Measurement: 0.01 1 to 99.9 1 (0 to 100 1 on
analog scale)
Accuracy: ±3% ±2 digits (0 to 100 1)
Open circuit voltage: 5 V ±1 V
Test current: 200 mA (–0 mA +20 mA)
(0.01 1 to 9.99 1)
20mA (±1 mA )
(10.0 1 to 99.9 1)