Specification - Aim TTi BS407 Manual De Instrucciones

Ranges and Accuracy
The 3½ digit display has a 1999 count full scale. Eight ranges are provided:
Range
1999 µΩ
19.99 mΩ
199.9 mΩ
1999 mΩ
19.99 Ω
199.9 Ω
1999 Ω
19.99 kΩ
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 2kΩ and 20kΩ ranges.)
Built-in battery charger allows instrument operation while re-charging.
Measurement circuit
Source emf:
Compliance:
Protection:
General
Battery:
Operating time:
Power:
Recharge time:
Operating Range: Indoor use +5ºC to +40ºC, 20% to 80% RH, up to 2000m, Pollution Degree 1.
Storage Range:
Safety and EMC:
Size and Weight:
Accessories:
Resolution Test Current F.S. voltage
250 mA
1 µΩ
50 mA
10 µΩ
10 mA
100 µΩ
5 mA
1 mΩ
500 µA
10 mΩ
50 µA
100 mΩ
1 Ω
10 µA
10 Ω
10 µA
18 mV (±2mV) with clamp active, < 6 V otherwise.
> 0.5 V on 1999µΩ range, > 1.0 V on all other ranges.
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.
4 internal non-removable Ni-MH cells. Low battery indication in display.
Typically > 150 hours with no test current flowing, > 8 hours continuous
measurement on lowest range.
110V–120V or 220V–240V AC (internal setting) ±10%, 50/60 Hz, 20VA max.
Nominally 12 hours with instrument not in use.
−40ºC to +50ºC.
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).
220 mm (w) x 102 mm (h) x 235 mm (d), 1.5 kg.
Supplied with Kelvin clip leads.
500 µV 0.1% reading + 0.4% range
1 mV 0.1% reading + 0.2% range
2 mV 0.1% reading + 0.1% range
10 mV 0.1% reading + 0.1% range
10 mV 0.1% reading + 0.1% range
10 mV 0.1% reading + 0.1% range
100 mV 0.1% reading + 0.1% range
200 mV 0.1% reading + 0.2% range

Specification

Accuracy
3