YOKOGAWA 2768, User Manual, Page: 9 / 19

IM 2768-01E
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3. COMPONENT NAMES AND FUNCTIONS
[1]
[5]
[12] [11] [3] [4] [10] [13] [2]
[6] [7] [9] [8] [14]
Fig. 3.1 Front Panel
Galvanometer
5. 3
EXTGA
− EXTBA +
EXT
1.5V
3V 6V 15V
POWER SUPPLY RANGE
EXT GA
L H
×100 Ω
×10 Ω
×1 Ω
×1 kΩ
×10 kΩ
×10 MΩ
×1 MΩ
×100 kΩ
×100 mΩ
B
CHECK
4 8 9
BA GA
Rs
(k Ω )
Rx
GUARD
YOKOGAWA
WHEATSTONE BRIDGE
2768
L H
OFF
INT GA SENSITIVITY
GUARD
(Front Panel)
[1] Measuring Arm:
(Rs)
Is composed of 5 dial type variable resistors, and is able to
change the resistance from 0.1 Ω till 11.111 kΩ in step of 0.1 Ω.
The resistance value indicated in the windows is connected to
the bridge circuit.
[2] Ratio Arm:
(Range)
Used to select a multiplying factor depending on
the resistance under test.
[3] Galvanometer Function Switch
INT. GA: Internal galvanometer is connected to the bridge circuit.
B CHECK:
Used to check the power source for the internal galvanometer.
(If the pointer reaches to the blue zone, the batteries are normal.)
EXT. GA: Internal galvanometer is connected to the bridge circuit.
In this case, the power source for the galvanometer is set to OFF.