17
Clamp Meter CHB 7
Clamp Meter CHB 37
Instruction Manual CHB 7 Order No. 93470 E
CHB 37 Order No. 93480 E
Contents
Page
1.0 Introduction / Scope of Supply
18
2.0 Safety
18
3.0 Controls and Connections
20
4.0 Operation
21
4.1 Preparation and safety measures
21
4.2 Current
Measurements
22
4.2.1 DC current measurements
(only
UNITEST Clamp Meter CHB 37
) 22
4.2.2 AC current measurements
22
4.3 Voltage
measurements
23
4.3.1 DC voltage measurements
24
4.3.2 AC voltage measurements
24
4.4 Frequency
measurements
24
4.5 Resistance
measurements
25
4.6 Continuity / Diode tests
26
4.6.1 Continuity testing
26
4.6.2 Testing diodes
26
4.7 True RMS measurements / crest factor
(only
UNITEST Clamp Meter CHB 37
)
26
4.8 MIN/MAX and peak value measurements
27
5.0 Maintenance
28
5.1 Changing the battery
28
6.0 Technical
data
29
Important advice on safety matters, both on the instrument and
in the Instruction Manual:
WARNING !
Warns of a potential danger, observe the advice
given in the Instruction Manual.
DANGER !
Indicates a dangerously high voltage.
Double insulated, protection class II IEC 61140.
Symbol for the marking of electrical and electronic equipment
(WEEE Directive 2002/96/EC).
Conformity symbol, the instrument complies with the valid
directives. It complies with the EMC Directive (89/336/EEC)
and the Low Voltage Directive (73/23/EEC) with their valid
standards.
UNITEST
®
PTDB93470-05.qxd 14.12.2005 9:56 Uhr Seite 17