Yokogawa DO202 2-Wire Dissolved Oxygen Analyzer Manuel d'utilisateur télécharger pdf (Page 68)

IM 12J05C01-01E

Appendix 2-3

3/3

QIS 12J05C01-01E

Table 4

Reference (nA) Data Display (nA)

2 2 ±0.02

6 6 ±0.04

12 12 ±0.07

Press the [ENT] key. The message display will show “POLAR.2.” Change the current of the DC

generator 2 and check the data display. The value on the data display must be within the range

shown in Table 5.

Table 5

Reference (nA) Data Display (nA)

20 20 ±0.1

60 60 ±0.3

100 100 ±0.5

Press the [ENT] key. The message display will show “POLAR.3.” Change the current of the DC

generator 2and check the data display. The value on the data display must be within the range

shown in Table 6.

Table 6

Reference (nA) Data Display (nA)

200 200 ±1

600 600 ±3

1000 1000 ±5

Press the [ENT] key until the message display shows “READY.” Press the [ENT] key again to

finish the tests.

Figure 1 Testing Circuit and Test Equipment

Shorting bar

G 11 12 16 15 13 18 14 17

DO202G

SUPPLY TEMP

GALV SENS POL SENS

+SH

SW1

24 V DC

Ammeter

300 :

DC Source

Decade

Resistance

Box

Generator 1

Generator 2

1 2 ... 63 64 65 66 67 68 69 70 71 72 73 ... 89 90

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