HT instruments GEO416 - Manual (Page 22)

GEO416 - GEO416GS
EN - 21
9. TECHNICAL SPECIFICATIONS
9.1. TECHNICAL FEATURES
Accuracy indicated as [%reading + (number dgts * resolution)] at 23 ± 5°C, <80%RH
3- and 2-wire earth resistance measurement - EARTH 3W and EARTH 2W
Measurement range (**)
Resolution [ ] Accuracy (*)
Reading [ ] Measure [ ]
0.01  19.99 0.08  19.99 0.01
(2.5%rdg + 2dgt)
20.0  199.9 20.0  199.9 0.1
200  1999 200  1999 1
2.00  19.99k 2.00  19.99k 0.01k
20.0  49.9k 20.0  49.9k 0.1k
Ground resistivity measurement -  (distance among the rods=1m)
Range (**)
Resolution [ m] Accuracy (*)
Reading [ m] Measure m]
0.06  19.99 0.50  19.99 0.01
(2.5%rdg+2dgt)
20.0  199.9 20.0  199.9 0.1
200  1999 200  1999 1
2.00  19.99k 2.00  19.99k 0.01k
20.0  199.9k 20.0  199.9k 0.1k
200  314k 200  314k 1k
 Measuring frequency: 77.5Hz; Test current:  12mA; Open loop voltage: < 25Vrms
 Disturbance voltage on ampere and volt circuits: the measurement is taken with the stated accuracy if the interfering
voltage is  3V, while for interfering voltages ranging from > 3V and  9V, the accuracy decreases progressively;
with an interfering voltage equal to 9V the instrument does not perform the test
(*) If R
P
> 1200 + 100 R
X
and/or R
C
> 1200 + 100 R
X
, R
P
> 50k  and/or R
C
> 50k  and the instrument carries out the
test, the accuracy of the instrument is (10% reading) where:
R
P
= resistance of the voltage circuit; R
C
= resistance of the current circuit; R
E
= measured earth resistance
(**) Automatic selection of the range
Interfering voltage measurement
Range (**)
Resolution [V] Uncertainty
Reading [V] Measure [V]
0  460 7  460 1 (2.0%rdg+2dgt)
(**) Automatic selection of the range