Applied Precision PTE 2100 Series, Руководство пользователя

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Portable Test Equipment
User’s Guide
www.appliedp.com
PTE-UGFW56a-EN
43
Dial test screen
* P59
Content:
COUNTERS
..... Values of meter counters (registers)
Prim. / Sec. switch ................ meter measures energy
for primary or secondary side of transformer
(if applicable). Default state is Sec.
................. #1 Value of counter before test
................. #2 Value of counter after test
.................
ΔE
Difference between #1 and #2
CT: ................... Current Ratio
VT: ................... Voltage Ratio
Prim. / Sec. ...... on which side of transformer is the
energy measurement carried out
3P3W ............... Actual Connection Type
E .............. Energy measured during the test
– two
values with regards to Prim. / Sec. switches
Error ........ Error calculated from E and
ΔE
E / t .......... Mean Energy within time period of the test
– two values with regards to Prim. / Sec.
switches
t ................ Duration of the test in minutes
<Progress bar>
.... Graphical interpretation of duration of the
test (in time mode) or energy dosage
progress (in energy mode)
Control keys:
F1 ............. Initialization / Start / Stop of the test
F3 ............. Switch to Maximum Demand Test Screen (also PgDn key can be used)
F4 ............ Save results of Dial tests
F5 ............. Menu
ESC ......... Exit
Remark:
Energy (Dial) test can lose accuracy when inappropriate amount of energy over time is intended to
dose. Error for the result of dial test can be expressed as (for PTE):
100. 𝑈
𝑚𝑎𝑥
. 𝐼
𝑚𝑎𝑥
𝑈. 𝐼. 74000. 𝑡𝑖𝑚𝑒
Then, for instance with range of accessory 500V/120A and dosing only 0.1A (230V) for 60s, it causes
an error of 0.059%. With higher current or with more time the error directly proportionally decreases.
This behavior is caused by lower resolution for small currents disregarding other errors like device
accuracy.
Conclusion : Dose more power for longer time (several minutes)!