Read Rate And Additional Uncertainty - Fluke 8508A User Manual

Reference multimeter
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8508A
Users Manual

Read Rate and Additional Uncertainty

Function
DCV, DCI &
[10]
Ohms
[6]
ACV & ACI
ACV Transfer
[6]
Off
PRT & Tru
[14]
Ohms
Notes to Performance Specifications
[1] Specifications apply for max resolution in each function, normal mode
[2] Assumes 4 hour warm-up period
[3] Input zero or offset null required whenever the temperature moves more than ±1 °C from the temperature at which the previous
null/zero was performed.
[4] TCal = Ambient calibration temperature
[5] Integration time >1 Power Line cycle
[6] Valid for signals >1 % Full Scale, Transfer Mode On. Signals must be DC coupled <40 Hz.
[7] Max Volt.Hertz 3 x 10
[8] >300 V, <10 kHz add: ±0.0004 x (Reading-300)
(Reading-300)
[9] Typical below 10 Hz for ACV, below 10 Hz and above 10 kHz for ACI.
[10] Tru Ohms mode available on 2 Ω to 20 kΩ ranges. Read Rate reduced in Tru Ohms Mode. Specification for Tru Ohms same as
corresponding Normal or Lo Current range
[11] Valid for 4-wire sensor
[12] Not including sensor uncertainty
[13] Assume Range and Full Scale = 2000 V when calculating for 1000 V Range. For DCI, additional errors only apply in 5 digit
resolution
[14] Fast mode not available in PRT
[15] The maximum display value for the Analog to Digital converter is 199 990 000 counts. This sets the maximum value measurable
on each range to be a one followed by four nines. For example, the maximum measured values on the 2 V range on DC Voltage
are ±1.999 900 00 V. However, the 1000 V ranges are limited to a maximum 1050 V.
[16] The zero TC specification only needs to be applied if an input zero has not been performed within ±1 ºC of the current operating
temperature.
[17] RSS (Root Sum Square). For more information refer to the Ratio Measurements portion of the "Applying the Specifications" area
of these specifications
[18] >2 GΩ Relative Humidity Operating <80 % to 30°C <70 % to 40°C
5-14

Read Rate and Additional Uncertainty

Filter
Resolution
Frequency
(Hz)
8
7
6
5
6
1
10
40
100
5
1
10
40
100
1
10
40
100
8
-
7
-
6
-
5
-
7
2
ppm >300 V, >30 kHz add: ±0.0024 x (Reading-300)
Read Rate
(readings/second)
Normal
Fast
1/25
1/6
1/6
1/2
2
35
35
150
1/50
1/5
1/2
1
1/50
1/5
1/2
2
1/25
1/2.5
1
4
1/90
1/30
1/30
1/10
1/4
1/3
1/3
1/3
2
ppm >300 V, 10 kHz - 30 kHz add: ± (0.0004 + (Frequency - 10000) x10
2
ppm
[13]
Additional Errors
± (ppm Reading + ppm Range)
Normal
Fast
0 + 0
0 + 0.1
0 + 0.1
0 + 0.5
1.0 + 0.5
0 + 2.5
0 + 5
0 + 25
0 + 0
0 + 0
0 + 0
0 + 0
0 + 5
0 + 5
0 + 5
0 + 5
200 + 20
200 + 20
200 + 20
200 + 20
0 + 0
0 + 0.1
1.0 + 0.5
0 + 5
-7
) x

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