BEAMEX TC303, Руководство по обслуживанию

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C - 2 TC305/TC303 - Calibration
45 to 50 V
±
2 mV
±
3 mV
13.5 to 15 V
±
0.5 mV
±
1 mV
3.6 to 4 V
±
0.2 mV
±
0.4 mV
99 to 130 mV
±
5
µ
V
±
10
µ
V
49 to 60 mA
±
2
µ
A
±
5
µ
A
19 to 22 mA
±
1
µ
A
±
2
µ
A
Required signals for calibration of A-section measurements:
Calibr. point Stable within Uncertainty
9.9 to 12 V
±
0.5 mV
±
1 mV
3.6 to 4 V
±
0.2 mV
±
0.4 mV
99 to 120 mV
±
5
µ
V
±
10
µ
V
27 to 30 mV
±
2
µ
V
±
3
µ
V
49 to 60 mA
±
2
µ
A
±
5
µ
A
19 to 22 mA
±
1
µ
A
±
2
µ
A
3600 to 4000
Ω ±
270 m
Ω
1170 to 1300
Ω ±
90 m
Ω
360 to 400
Ω ±
30 m
Ω
144 to 160
Ω ±
15 m
Ω
Required equipment for calibration of resistance simulation:
Resistance measuring device:
∗
measurement current 1 mA +/- 10%
∗
accuracy 0 to 400 ohm: better than 15 mohm
∗
accuracy 400 to 4000 ohm: better than 150 mohm
or
Current source 0.9 to 1.1 mA, known with uncertainty
±
30 nA
and voltage measuring device:
∗
0 to 5 V: R
in
>10 G
Ω
, accuracy better than 0.001 % of reading
The stated accuracies for the necessary equipment are about three times better
than the accuracy specified for TC305/TC303. If the accuracies of the calibration
equipment are worse, the calibration period should be shorter. If you, however,
are not sure that the calibration equipment has better accuracy than the
TC305/TC303 to be recalibrated, send it to Beamex for calibration.