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3 Specifications and Environmental
Conditions
3.1 Specifications
Resistance range
0to1M
Ω
, auto-ranging
Resistance accuracy, one
year
1
0to5k
Ω
:0.5
Ω
5k
Ω
to 200 k
Ω
: 0.01% (100 ppm) of reading
200 k
Ω
to1M
Ω
: 0.03% (300 ppm) of reading
Resistance accuracy, short
term
1
0to5k
Ω
:0.25
Ω
5k
Ω
to 200 k
Ω
: 0.005% (50 ppm) of reading
200 k
Ω
to1M
Ω
: 0.02% (200 ppm) of reading
Temperature accuracy,
typical
1, 3, 4
0°C: 0.002°C
25°C: 0.002°C
50°C: 0.004°C
75°C: 0.010°C
100°C: 0.020°C
(Using 10K
Ω
thermistor sensor,
α
= 0.04. Does not inclue probe uncer-
tainty or characterization errors.)
Temperature coefficient of
resistance
1
2.5 ppm/°C
Resistance resolution
0to10k
Ω
:0.01
Ω
10 k
Ω
to 100 k
Ω
:0.1
Ω
100 k
Ω
to1M
Ω
:1
Ω
Temperature resolution
0.0001°C (0.0001°F)
Probe
Thermistor; also, 1k
Ω
RTD
Number of input channels
1
Probe connection
Four-wire with shield, 5-pin DIN connector
Maximum acceptable lead
resistance
100
Ω
Probe characterizations
Steinhart-Hart exponential polynomial
Callendar-Van Dusen; R
0
,
α
,
δ
, and
β
Display units
C (degrees Celsius)
F (degrees Fahrenheit)
K (Kelvin)
Ω
(resistance in ohms)
Display
8-digit, 7-segment, yellow-green LED; 0.5 inch high characters
Clock accuracy, typical
0.01%
Probe excitation current
0to51k
Ω
:10
μ
A
51 k
Ω
to1M
Ω
:2
μ
A
2 Hz, alternating
Measurement period
1 second
Digital filter
Exponential, 0 to 60 secinds time constant (user selectable)
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3 Specifications and Environmental Conditions
Specifications