HT Instruments XL421 Manual De Instrucciones página 23

2 GENERAL DESCRIPTION
2.1 INTRODUCTION
The instrument was designed to grant the user the utmost safety conditions thanks to a
new concept assuring double insulation and overvoltage CAT III 1000V∼ to ground or CAT
IV 600V∼ to ground.
2.2 FUNCTIONS
This manual is referred to two models: XL421 and XL422. XL421 can recording a single
Current in single phase or three phase plant. XL422 can recording up to 3 Currents
simultaneously in single phase or three phase plant.
Where not expressly indicated the characteristics are common for both models.
The instrument can monitoring a plant for a long time thanks to a sophisticated memory-
managing algorithm. More exactly, the instrument uses the following sampling periods:
Measuring Interval
1s
6s
30s
1min
5min
(*) Depending on batteries autonomy
The instrument starts each recording using the Measuring Interval set through PC
management software (see § 8). Just before the event of full memory, the instrument
applies the successive measuring Interval to all the memory, thus getting more free
memory locations. The instrument continues the data storing according to the new
Measuring Interval.
XL421 – Autonomy (days)
5
34
170
364 (*)
1820 (*)
EN - 4
XL421 - XL422
XL422 – Autonomy (days)
1.5
8
42
91
455 (*)