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Tyco 1540 manual Analogue Output Set Up, Second Channel, Reverse Operation, Reduced output range

Models: 1540

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3.15 Analogue Output Set Up

0240

0340

0440

0640

1000

1540

Option

This is an option on Models 1540 that have separate (1560 or 1580) transducers.

3.15.1 Introduction

This applies to the analogue output option only, allowing the parameter to be selected, and the upper and lower limits adjusted, for either one or two channels.

For each analogue output fitted, provision is made for five values to be user selected. These are:

•A1r – Parameter, from Table 2. This is the measured input that is to be represented by the analogue output, for example, Watts or Frequency.

•A1rt – Reading Top. This is the value of the electrical parameter that will cause the analogue output to produce ‘Output Top’.

•A1rb – Reading Bottom. This is the value of the electrical parameter that will cause the analogue output to produce ‘Output Bottom’.

•A1ot – Output Top. This is the value of output that will be reached when the measured electrical parameter is at the reading top value.

•A1ob – Output Bottom. This is the value of output that will be reached when the measured electrical parameter is at the reading bottom value.

To aid understanding, a simple example is shown in Section 3.15.2.

3.15.1.1 Second Channel

The screens following show the set-up for the first analogue channel. Set-up of the second analogue output is identical except that screens show ‘A2’ instead of ‘A1’, i.e. A2r, A2rt, A2rb, A2ot, A2ob.

At the end of the set up for the second analogue output pressing >> will exit the set up system and enter the display mode.

3.15.1.2 Reverse Operation

It is possible to set reading top below reading bottom. In the example of Section 3.15.2, setting reading top to 95 volts and reading bottom to 135 volts would cause the output current to decrease from 20mA to 4mA as the measured voltage increased from 95 to 135 volts.

3.15.1.3 Reduced output range

Note that if the output values are adjusted to reduce output range, accuracy may be degraded. For example, if a 0-20mA capable output is set to operate over 0-1mA, then the specified accuracy will be degraded by a factor of 20.

34 Integra 1540, 1000, 0640, 0440, 0340, 0240 Issue 1 04/03

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Tyco 1540 manual Analogue Output Set Up, Second Channel, Reverse Operation, Reduced output range
Page 35 Page 37

1540 specifications

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