GW Instek GDM-8246 User Manual - Manual (Page 8)

DUAL DISPLAY DIGITAL MULTIMETER
USER MANUAL
11
11. CONTINUITY BEEPER
Description Built in buzzer sounds when conductance is less than 5 ohm.
Open Voltage 3 volts maximum.
Protection 450V dc or peak ac continuous.
12. 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 -10℃ 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 to75% , 0℃
to 35℃.
13. 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/220V/230V±10%, 50/60Hz, 12.5VA, 10.5W.
Accessories
Test Lead × 1
Instruction manual × 1, Interface manual × 1
Dimension 251(W)×91(H)×291(D) m/m
Weigh Approx. 2.6 kg
WARNING ： 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
12
4. OPERATION INSTRUCTIONS
4-1. Front panel and rear panel
The front panel, shown in Figure 4-1, 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, input fuse
holder, and interface terminal.
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. Set mode
Press [SHIFT] [SET] in sequence into SET mode, then proceed further
setting by pressing the white characters with blue background [HI],
[LO], [REF Ω], [RS232], [GPIB], [ENTER] sequentially.
4-4. Warm up
The instrument requires half-an-hour warm up to achieve rated
accuracy.
4-5. Over-range indication
An input is over-range if it exceeds the full scale of the selected range.
GDM-8246 indicates an input is over-range by lighting the “—OL—”
pattern on display.
4-6. 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 110kHz, the primary display will show “————”.