Siemens Pacemaker UM344-2 Manual do Utilizador descarregar pdf (Página 109)

UM344-2 CALIBRATION AND MAINTENANCE

September 1995

Ohm input (wide range) ...... Equal to or less than +/-1.3 ohm of Zero and Full Scale ohmic

values.

Ohm input (narrow range) . Equal to or less than +/-0.45 ohm of Zero and Full Scale ohmic

values.

Equal to or less than +/-0.02% of selected span in ohms; the higher

value will be the accuracy tolerance.

5. Set decade box to resistance corresponding to Full Scale value and check accuracy of indication

against specifications listed in step 4.

If calibration is required, retain the test set-up and proceed to Section 6.1.3.2 to perform the Current

Source Calibration.

If accuracy is within specifications, calibration is not required. Disconnect test equipment, reconnect

all wires, and install enclosure cap.

6.1.3.2 Current Source Calibration (Transmitters with Software Rev 1 only)

1. Turn OFF the power supply.

Disconnect the test resistance decade box from the transmitter.

Connect the test microammeter to the transmitter as shown in Figure 6-3 and turn ON the power

supply.

2. From the MXC, execute the FIND XMTR program. (Refer to Section 2.)

Select CAL/TEST (F2) from the display menu.

1) Step through the MXC screens using the PREV and NEXT buttons to select CURRENT

SOURCE calibration. Press SELECT (F4). The MXC

will display the adjacent screen:

2) Press CONT (F4). MXC will display:

3) Press CONT (F4). MXC will display:

SHORT mV+ (1) TO RTD (2)

WITH COPPER WIRE

CONT

PRECISELY MEASURE THE

CURRENT BETWEEN RTDI

(2) AND mV- (3)

CONT

ENTER THE CURRENT

QUIT ENTER

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Siemens Pacemaker UM344-2 Manual do Utilizador Página 109