Micro Motion RFT9709 Manuál s instrukcemi stáhnout pdf (Strana 170)

156

Using ProLink

Software with Micro Motion

Transmitters

Test Menu

continued

Milliamp output testing

15.2 Milliamp output testing

Connect a reference device such as a digital multimeter (DMM) to the

transmitter terminals listed in

Table 15-1

, then perform the milliamp

output test procedure as described below.

If HART over Bell 202 is being used, and the output being trimmed is the

primary milliamp (mA) output, before performing the milliamp output test

procedure:

• Connect a 600 ohm resistor in series to the mA output terminals of

an IFT9701 or IFT9703.

• Connect a 250-1000 ohm resistor in series to the primary mA output

terminals of an RFT9739, RFT9712, or RFT9729.

Table 15-1. Milliamp output

terminals

Performing milliamp

output test

To perform a milliamp output test:

1. Open the Test menu, then choose Milliamp Output Test. When

connected to an RFT9739, the ProLink menu bar displays a

cascading menu, allowing the user to choose the primary output

(milliamp output 1) or secondary output (milliamp output 2) for

testing. The dialog box shown in

Figure 15-1

then appears.

2. Enter the desired output level, in milliamps, into the Set Output To

text box.

• For an RFT9739, enter any current level from 0 to 22 mA if the

output produces a 0-20 mA current, or 2 to 22 mA if the output

produces a 4-20 mA current

• For an IFT9701, IFT9703, RFT9712, or RFT9729, enter any

current level from 2 to 22 mA

3. Choose Set, then check the readout from the reference device. It

should indicate the same amount of current as the amount entered

into the Set Output To text box in step 2.

If you choose Cancel before selecting Done, or if communication

between the ProLink program and the transmitter is interrupted before

the procedure is completed, Analog 1 Fixed or Analog 2 Fixed remains

ON in the Status window. To read the Status window, open the View

menu, then select Transmitter Status. To clear the alarm, reopen the Test

Dialog box and select Done.

Transmitter

Primary mA output

terminals

Secondary mA output

terminals

RFT9739 field-mount 17 PV+ 19 SV+

18 PV– 20 SV–

RFT9739 rack-mount CN2-Z30 PV+ CN2-Z28 SV+

CN2-D30 PV– CN2-D28 SV–

IFT9701/IFT9703 4-20 mA + —

4-20 mA –

RFT9712 17 4-20 mA + —

16 4-20 mA –

RFT9729 B16 mA + —

B14 mA –

1 2 ... 165 166 167 168 169 170 171 172 173 174 175 ... 213 214

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