Yokogawa DM8C/VD6 Liquid Density Analyzer Manual de usuario descargar pdf (Pagina 57)

< 5. MAINTENANCE >

5-3

IM 12T03A01-02E

F0502.ai

Check point

Measuring instrument Measuring conditions Normal value

12 V±10 %

200 V±10 %

5.8 to 6.4 V



;N5DQJH

6 to 8 V p-p

150 to 200 V p-p

200 mV p-p

4 to 6 V p-p

-3 to 0 V

A5 – B5

A6 – B5

B – B5

IN –

B4 – B5

5±%

A – B5

C – B5

D – B5

DC voltmeter

For measurement of 2 ,

the meter input impedance

VKRXOGEHDWOHDVW0ȍ

Multimeter

Oscilloscope

DC voltmeter

Disconnect leadwires from terminals

,15DQG%RQ3&%FRQQHFWDQ

RVFLOODWRUWR+]RXWSXW9

and apply an input of 100 mV rms.

Lower 100 mV rms input

5HPHGLDOPHDVXUH

for abnormal value

&KHFNFRQYHUWHU,1387

assembly.

5HSODFH'

Check pickup electrode.

Check for defective circuit

components and replace

them.

7HUPLQDO

Box

Black

White

Blue

Yellow

Green

Brown

Green

3W

White

5HG

Black

5HG

3LH]RHOHFWULF

element

Case ground

1mS

Vibrator output

wavefarm between

B4 and B5 when

density detector is

operating normally.

(Note) Regading to repair parts, consults with service personnel.

Figure 5.3 Oscillation Ampliﬁ er Check Points

1 2 ... 52 53 54 55 56 57 58 59 60 61 62 63 64

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Yokogawa DM8C/VD6 Liquid Density Analyzer Manual de usuario Pagina 57

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