HT2055
EN - 31
11 TECHNICAL SPECIFICATIONS
Accuracy is calculated as ±[%rdg + (number of dgt* resolution)] at reference condition
indicated in § 11.2
Step/Contact voltage measurement (unit HT2055M)
Measured voltage range
Resolution
Accuracy
0.01
19.99mV
0.01mV
(2.0
rdg + 2dgt)
20.0
199.9mV
0.1mV
200
1999mV
1mV
2.00
19.99V
0.01V
20.0
59.9V
0.1V
Calculated voltage range
Resolution
Accuracy
0.0
99.9V
0.1V
calculated value (*)
100
999V
1V
1.00kV
9.99kV
10V
(*) The calculated value of step/contact voltage is obtained by the relationship: U
S
=U
mis
·
I
flt
/I
gen
;
U
C
=U
mis
·
I
flt
/I
gen
;
Fault current range (selectable):
1A
200kA
Input resistance (selectable):
1k
, 1M
Noise reducing:
DSP 55Hz filtering, 64dB rejection of 50/60Hz noise
Earth resistance measurement (unit HT2055S)
Measurement range
Resolution
Accuracy
0.001
1.999
0.001
(2.0
rdg + 5dgt)
2.00
19.99
0.01
20.0
99.9
0.1
100.0
199.9
(5.0
rdg)
Open voltage:
< 50V AC
Test current:
< 7.5A
Frequency of test signal:
55Hz
Influence of probe resistance:
±(10%rdg + 10dgt)
(Rc, Rp)
max
(10
+ 100R) or 2k
considering lower value
Automatic test of probe resistance:
Yes
Automatic detection of voltage noise
Generated current range
Resolution
Accuracy
0.00
9.99A
0.01A
(3.0
rdg + 5dgt)
10.0
99.9A
0.1A
(3.0
rdg + 3dgt)
Generated current:
55A max
Test voltage:
<55V
Test frequency:
55Hz
Ground resistivity measurement (unit HT2055S)
Measurement range
Resolution
Accuracy
0.00
m
9.99
m 0.01
m
Calculated value, considering
accuracy of resistance to earth
function
10.0
m
99.9
m 0.1
m
100
m
999
m 1
m
1.00k
m
9.99k
m 0.01k
m
10.0k
m
99.9k
m 0.1k
m
Measurement range
Resolution
Accuracy
0.00
ft
9.99
ft 0.01
ft
Calculated value, considering
accuracy of resistance to earth
function
10.0
ft
99.9
ft 0.1
ft
100
ft
999
ft 1
ft
1.00k
ft
9.99k
ft 0.01k
ft
10.0k
ft
299.9k
ft 0.1k
ft
Principle of measure:
Wenner method
= 2*
* distance* R
