Omega Engineering CYD201 and CYD208 manual 2 A/D Converter Calibration

OMEGA Model CYD201/CYD208 User’s Manual

5.7.2A/D Converter Calibration

NOTE: Current source calibration must be performed before A/D converter calibration.

1.Allow 30 minute warm-up to achieve rated specifications.

2.Perform current source calibration.

3.Configure 125 k￿resistor as shown in Figure 5-4. Set Model 208s to channel 1.

4.Wait 10 seconds for resistor voltage to settle.

5.Press CAL ENABLE, then within 2 seconds press UNITS. The display window shows "-CAL-" for approximately 15 seconds.

6.Repeat procedure with 25 k￿resistor.

7.For Model CYD208, repeat procedure for other 7 channels. See Figure 2-2 for pin assignments.

5.8SERIAL INTERFACE CABLE AND ADAPTERS

6
5	TxD	YELLOW
4	Gnd	GREEN
3	Gnd	RED
2	RxD	BLACK
1

6 5 4 3 2 1

Figure 5-5. Model CYD200-J10 RJ-11 Cable Assembly Wiring Details

13	12	11	10	9	8	7	6	5	4	3	2	1
25	24	23	22	21	20	19	18	17	16	15		14
DB-25 CONNECTOR
= NOT							RxD

USED

Gnd

TxD

1 2 3 4 5 6

RJ-11

RECEPTACLE

Figure 5-6. Model CYD200-D RJ-11 to DB-25 Adapter Wiring Details

5-6 Service