Manual

DUAL DISPLAY DIGITAL MULTIMETER
USER MANUAL
10
10. CONTINUITY BEEPER
Description
Built in buzzer sounds if conductance is less than 5 ohm.
Open Voltage
3 volts maximum.
Protection
450V dc or peak ac continuous.
11. ENVIRONMENTAL
Operation
Environment
Indoor use, altitude up to 2000m.
Ambient Temperature 0℃ to 50℃.
Relative Humidity 75% (Maximum).
Installation category II
Pollution Degree 2
Storage temperature
-40℃ to 70℃.
Relative Humidity
Up to 75%, 0℃ to 35℃, Up to 50%, 35℃ to 50℃, except
the ranges of 2MΩ and 20MΩ which are up to 75% , 0℃
to 35℃.
12. GENERAL
Maximum Common
Mode Voltage
500V dc or peak ac ( low terminal potential with
respect to power line ground ).
Warm Up
0.5 hours to achieve rated accuracy.
Power source
AC 100V/120V/230V±15%, 50/60Hz, 8.0VA, 6.0W.
Accessories
Test Lead × 1
Instruction manual × 1
Dimension 251(W)×91(H)×291(D) m/m
Weigh
Approx. 2.6 kg
WA RN IN G：To avoid electrical shock, the power cord
protective grounding conductor must be connected to
ground.
CAUTION：To avoid damaging the instrument, do not use
it in a place where ambient temperature exceeds
50℃.
DUAL DISPLAY DIGITAL MULTIMETER
USER MANUAL
11
4. OPERATION INSTRUCTIONS
4-1 Front panel and rear panel
The front panel, shown in Figure4-1, contains three main elements:
the input terminals, the primary and secondary displays, and the push
buttons.
The rear panel, shown in Figure 4-2, contains the AC power-line
connector, and fuse & line voltage selector, and input fuse holder.
4-2 The [SHIFT] key and function keys
[SHIFT] button is used to enable the secondary function of certain
function keys that with blue symbols printed above. The SHIFT LED
will be on after pressed the [SHIFT] button. At this time, only the
buttons with blue symbols are workable. To release SHIFT function,
press [SHIFT] again. For example, to select DCmV function, press
[SHIFT], then press [DCV] ([DCmV]).
4-3 Warm up
The instrument requires half-an-hour warm up to achieve rated
accuracy.
4-4 Over-range indication
An input is over-range if it exceeds the full scale of the selected range.
GDM-8245 indicates an input is over-range by lighting the “—OL—”
pattern on display.
4-5 No specification indication
On AC+Hz measured mode, when an input is less sensitivity, the
secondary display show “————”. When the frequency of an input
exceeds 51kHz, the primary display will show “————”.