3
Specification
Ranges and Accuracy
The 3½ digit display has a 1999 count full scale. Eight ranges are provided:
Range
Resolution Test Current F.S. voltage
Accuracy
1999 µ
Ω
1 µ
Ω
250 mA
500 µV
0.1% r 0.4% range
19.99 m
Ω
10 µ
Ω
50 mA
1 mV
0.1% r 0.2% range
199.9 m
Ω
100 µ
Ω
10 mA
2 mV
0.1% r 0.1% range
1999 m
Ω
1 m
Ω
5 mA
10 mV
0.1% r 0.1% range
19.99
Ω
10 m
Ω
500 µA
10 mV
0.1% r 0.1% range
199.9
Ω
100 m
Ω
50 µA
10 mV
0.1% r 0.1% range
1999
Ω
1
Ω
10 µA
100 mV
0.1% r 0.1% range
19.99 k
Ω
10
Ω
10 µA
200 mV
0.1% r 0.2% range
Accuracies apply for a calibration interval of 1 year at 23º ±5ºC after 5 minutes warm-up, with the
instrument and test connections in thermal equilibrium and the zero correctly set.
Temperature coefficient outside the stated range is < ±45 ppm/ºC.
Facilities
Set zero by front panel control with switch to divert test current from unknown.
Test current polarity reversal for thermal emf detection.
Front panel lamp indicates correct force circuit measurement conditions.
20mV source emf clamp to limit open circuit voltage across the unknown to 20mV maximum for
"dry circuit" testing of switch and relay contacts. (Not available on 2k
Ω
and 20k
Ω
ranges.)
Built-in battery charger allows instrument operation while re-charging.
Measurement circuit
Source emf:
18 mV (±2mV) with clamp active, < 6 V otherwise.
Compliance:
> 0.5 V on 1999µ
Ω
range, > 1.0 V on all other ranges.
Protection:
The meter is protected against the back-emf of its own test current from any
inductance and against accidental short-term connection to external voltage
sources up to 50 V.
General
Battery:
4 internal non-removable Ni-MH cells. Low battery indication in display.
Operating time:
Typically > 150 hours with no test current flowing, > 8 hours continuous
measurement on lowest range.
Power:
110V–120V or 220V–240V AC (internal setting) ±10%, 50/60 Hz, 20VA max.
Recharge time:
Nominally 12 hours with instrument not in use.
Operating Range: Indoor use +5ºC to +40ºC, 20% to 80% RH, up to 2000m, Pollution Degree 1.
Storage Range:
−
40ºC to +50ºC.
Safety and EMC: Complies with EN61010-1 & EN61326-1.
For details, request the EU Declaration of Conformity for this instrument via
http://www.aimtti.com/support (serial no. needed).
Size and Weight: 220 mm (w) x 102 mm (h) x 235 mm (d), 1.5 kg.
Accessories:
Supplied with Kelvin clip leads.