Valhalla 4176, Operation Manual

Page: 13 / 89

7
Chapter 2
.
S
PECIFICATIONS
The specifications for the 4176 Programmable
µ
-Ohmmeter are listed in the following
paragraphs. In all cases the specifications are valid for full Kelvin Four-Terminal
measurements using connections having less than 20m
Ω of lead resistance per wire.
2.1 Standard Measurement Mode Specifications
Table 2 – Range Characteristics
Range Full Scale
Maximum
Resolution
Current
Source
1
20m Ω 20.000m Ω
1
µ
Ω
1A
.2 Ω .30000 Ω
10
µ
Ω
1A
2 Ω 3.0000 Ω 100
µ
Ω 100mA
20 Ω 30.000 Ω 1m Ω 10mA
200 Ω 300.00 Ω 10m Ω 1mA
2k Ω 3.0000k Ω 100m Ω 100
µ
A
20k Ω 30.000k Ω 1 Ω
10
µ
A
1
Current source is ±1%
absolute accuracy.
Table 3 – Standard Measurement Mode Accuracy
Accuracy
2
(± % of reading ± % of range)
Range
24 hours 1 Year
Temperature
Coefficient
3
20m Ω ±0.006 ± 0.012 ±0.02 ± 0.02 ±0.002%/°C
.2 Ω ±0.006 ± 0.012 ±0.02 ± 0.02 ±0.002%/°C
2 Ω ±0.006 ± 0.012 ±0.02 ± 0.02 ±0.002%/°C
20 Ω ±0.006 ± 0.012 ±0.02 ± 0.02 ±0.002%/°C
200 Ω ±0.006 ± 0.012 ±0.02 ± 0.02 ±0.002%/°C
2k Ω ±0.006 ± 0.012 ±0.02 ± 0.02 ±0.002%/°C
20k Ω ±0.006 ± 0.012 ±0.02 ± 0.02 ±0.002%/°C
2
The accuracy
specifications listed are
valid following a 30 minute
warm-up at an ambient
temperature between 15
°
C
and 35
°
C, and include the
effects of line voltage
variations within the
allowed range.
3
Temperature coefficient
specified for temperature
ranges from 0°C to 15°C
and 35°C to 50°C.