Operator Manual

748223-K June 2002

Model 7003M

CAUTION

TOTAL OUTPUT RESISTANCE

Total resistance of all output devices and associated interconnection cable must not exceed 600 ohms.

c.Current Output Connections

Refer to Figure 2-4 on page 2-7. Isolated current output (0 to 20 or 4 to 20 mA) is standard on the Model 7003M. To convert from current output to voltage output, see Section 2-5d below.

1.Disconnect power to the analyzer. Remove rear cover.

2.Connect the shielded recorder cable leads to the rear panel of the analyzer (Figure 2-2 on page 2-3):

TB3-7 has no connection

TB3-8 negative (-)

TB3-9 positive (+)

3.Connect the other end of the output cable to terminals of the output device. Ensure that polarity is correct. Connect the shield to a suitable ground point.

NOTE:

Current output terminals are not grounded. Ground the current loop at some point within the circuit to minimize noise or other undesirable inter- actions.

4.Replace the rear cover. Do not overtighten cover retaining screws, to avoid stripping the threads in the plastic case.

5.To connect recorder(s), see Figure 2-4 on page 2-7.

d.Voltage Output Connections

Refer to Figure 2-4 on page 2-7. To convert the voltage output to current output see Section 0 above.

To monitor the signal output with a voltage recorder or other voltage device, the standard current output must be converted into a voltage by connecting a resistor in parallel with the output device as follows:

1.Determine the resistor value (R) required:

R1 ohms = (fullscale voltage, volts)/(0.02 amps)

2.Disconnect power; remove the rear cover.

3.Connect resistor (1/4 watt or greater) of value R between TB3-8 and TB3-9 (Figure 2-4 on page 2-7).

4.Connect leads of a shielded recorder cable to the rear panel of the analyzer (Figure 2-2 on page 2-3):

TB3-7 has no connection

TB3-8 negative (-)

TB3-9 positive (+)

5.Connect other end of output cable to terminals of output device. Ensure that polarity is correct.

6.Replace the rear cover. Do not overtighten cover retaining screws, to avoid stripping the threads in the plastic case.

7.For the low end point to be 0 volts, set the current output range to 0 to 20mA when setting up the instrument (Section 3-5b on page 3-13).

2-6 Installation

Rosemount Analytical Inc. A Division of Emerson Process Management