Omega Engineering CCT-55-I manual Input

SIGNAL INPUT RANGE SELECTION

Set the jumper to the position indicated in the table below for each range. The jumpers are located on the "MP" input board and "ME" input module. See Fig. 9.

If the signal input range is modified, follow the adjustment and calibration procedure.

"MP" Input board

Components

view

"ME" Input module Components view

FIG.9

D

A

INPUT		Close jumpers on module :
RANGE		MP	ME
0 to 5mAdc		A & D	--------
0 to 20	mAdc	D		C
4 to 20	mAdc	D	A & C
0 to 50	mAdc	D	-------

A B C

TABLE 7

ADJUSTMENT AND CALIBRATION PROCEDURE

1.When input and output signal values are determined, remove the conditioner case. (Fig. 1).

2.Check on the "MA" module, if the selected power supply is correct. (Table 1).

3.Select on the "MP" input board and "ME" input module the desired Current range, according

to	Table 7.
	Close on "MS-55" output module, jumper E & solder pad 1, and open the jumpers A, B, C &
D	and solder pads 2 & 5, according to Tables 2 and 3.
4.	Connect the calibrator to the conditioner terminals	5 and 6.

5.Connect a digital voltmeter, to the jumper "J4" located on the "MS-55 output module.

6.Power up the signal conditioner with the appropriate power supply.

7.Adjust the calibrator until it generates the low signal level.

8.Check the voltmeter reading is 0. If not, turn the trimmer P1, located on the "ME" input module, until the reading of the voltmeter is 0.

9.Adjust the calibrator until it generates the high signal level.

10.Check the voltmeter reading is 10.00 V. If not, turn the trimmer P2, located on the "ME" input module, until the reading of the voltmeter is 10.00 V.

11.Repeat steps 7 thru 10, until the two values are correct.

12.Connect a digital frequency meter, to the signal output terminals 11 and 12. The reading must be between 2500/5000 Hz.

13.Select on the "MS-55" output module, the corresponding jumpers, according to Tables 2 & 3.

14.Adjust the calibrator until it generates the high signal level and turn the SPAN trimmer (P3), located on the "MS-55" output module, until the frequency meter shows the desired output frequency.

15.Disconnect the conditioner and the instruments used and reinsert into the case.

12