METREL MI 3290 User Manual

MI 3290 Earth Analyser Tests and Measurements
114
11.11 Checkbox
The Checkbox provides a simple and effective means of checking the Earth Analyser
instrument and accessories especially Flex and Iron Clamps.
Checkbox
Measurement
Test
Mode
LF
HF
Filter
Test
Voltage
Uh, Us, Ues,
f, Igen, Ic,
If1, If2, If3, If4
Check V – Meter
single
55 Hz
15 kHz
FFT
20/40 V
Check A – Meter
single
55 Hz
15 kHz
FFT
20/40 V
Check Iron, Flex Clamps
single
55 Hz
1,5 kHz
FFT
20/40 V
Table 11.97: Available Checkbox measurements in the MI 3290
Note:
 The Checkbox feature should be used to ensure that the meter is reading correctly
between calibrations but should not be regarded as a substitute for a full
manufacturer’s calibration on the unit.
Us
Uh
H
S
ES
E
MI 3290 Earth Analyser
G
V
V
V
Output terminal
(H, S, ES, E) Open !
S1
S2
S3
DMM
+
-
V
optional
Ues
H
S
ES
E
MI 3290 Earth Analyser
G
A
DMM
+
-
A
Igen
optional
Figure 11.98: Checkbox measurements
V-meter example
Figure 11.99: Checkbox measurements
A-meter example
F4 F2
F3
F1
Flex clamp
If1
H
E
MI 3290 Earth Analyser
G
A
Igen
A
C
C
Ic
Igen
If2
Iron clamp
Figure 11.100: Checkbox measurements Iron, Flex Clamps example

METREL MI 3290 Specifications

General

Brand	METREL
Model	MI 3290
Category	Measuring Instruments
Language	English