Operation Manual

GMC-I Messtechnik GmbH 19
7 Measuring Alternating Voltage
Sinusoidal alternating voltage within a frequency range of 40 to 200 Hz
can be measured with the test instrument.
Ð Press the U~/f key.
Ð Contact the measuring points with the measuring probes.
Note
+
The input impedance for the voltage measuring range is 5 M
8 Measuring Temperature and Humidity with Adapter Z541A
(Accessory Adapter)
Temperatures within a range of –10.0 C to +50.0 C, as well as relative
humidity from 10.0% to 90.0% can be measured with the temperature-
humidity combination adapter.
Ð Connect the temperature-humidity adapter to the IR interface of the
test instrument (see drawing on page 2) by inserting the guide pin of
the adapter in the opening provided at the top of the test instrument
such that the adapter is located on the two rubber pads in central
position to the housing. Then push the adapter down to fix it tightly.
Ð Press the T/F
REL
key. The adapter is activated via the interface.
Ð Select the desired temperature unit of measure, C or F, with the
corresponding key. Temperature and humidity are displayed directly.
Ð We recommend moving the test instrument with the adapter to and
fro for a few seconds to enable the adapter to adjust to the prevailing
room climate more quickly. The air current can thus penetrate through
the opening into the adapter housing more quickly. It would otherwise
take several minutes to achieve this condition.
Ð When changing to another function, the adapter is deactivated.
Ð The measured values are only updated every 5 seconds to spare the
adapter batteries.
Display at the Test Instrument
The „———“ symbol shown on the display can be attributed to the fol-
lowing causes:
– incidence of sunlight
– depleted batteries in adapter Z541A
– adapter defective or not properly positioned
Adapter Z541A should not be exposed to intensive sunlight to prevent
inadvertent activation via infrared (battery life!).