Operation Manual

GMC-I Messtechnik GmbH 5
uppermost scale, low-resistance at the middle scale and voltage at
the bottom scale. The device’s operating status and battery charge
level are indicated with the 2-color LED in the scale (Figure 1).
The battery compartment is located in the housing base (6). The
procedure for replacing batteries is described in 3.2.
All measurements are performed with two test probes:
• One test probe (1) is permanently attached to the housing –
positive pole.
• The other (8) is attached to a coil cord – negative pole
This test probe (8) can be inserted into the opening (9) and secured
by snapping the handle into the detaining fork (7).
As long as the toggle switch (4) is in the neutral middle position, the
METRISO 5024 can be utilized as a voltmeter.
The rotary switch must be set either to the 100 V, 250 V or 500 V
position in order to perform voltage measurements. No batteries are
required for this function.
The rotary switch must be set to the Ω position in order to perform
low-resistance measurements. Measurement is performed with the
toggle switch (4) in the Ω position. Voltage cannot be measured as
long as the rotary switch (3) remains in this position.
The desired test voltage must be selected with the rotary switch (3)
before performing insulation measurements. Measurement is
performed with the toggle switch (4) in the MΩ position.
3 Preparation for Device Operation
3.1 Unpacking the Device
Check for mechanical damage after unpacking the device. The
device is ready for use as soon as the batteries have been inserted
into the battery compartment.
3.2 Power Supply – Battery Replacement
The METRISO 5024 is operated exclusively with batteries for safety
reasons. Batteries are inserted or replaced as follows:
Ð First disconnect the measurement cables from the device under
test.
Ð Loosen the fastening screw at the bottom of the battery
compartment (6) and remove the battery compartment.
Ð Remove the depleted batteries and replace them with new or
fully charged batteries. Make sure that battery polarity is not
reversed during insertion (see printed symbols on the
compartment).
Ð Push the battery compartment back in and secure it with the
screw.
Recommended batteries: 4 ea. alkaline batteries per LR6, mignon
cells, AA cells, 1.5 V, at least 2300 mAh
3.3 Checking the Mechanical Zero Point
Ð Lay the device horizontally onto a work surface.
Ð Check the pointer for correct zero point adjustment and reset
with the adjusting screw (2a) if necessary.
The device may not be connected to a measuring circuit during
this procedure, and the toggle switch may not be activated.
Don’t forget: Negative pointer deflection is suppressed by the
scale’s limit stop. Always turn the adjusting screw clockwise for
this reason, and then slowly turn it counterclockwise until the 0 Ω
or 0 V position is reached.