Process Indicator Menu Structure - Michell Instruments Pura User Manual

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2.3

Process Indicator Menu Structure

Once the Pura Hygrometer is set-up it should not require much adjustment. The dew-point transmitter is

supplied, as standard, with a linear output of 4-20 mA (corresponding to -120ºCdp (-184ºFdp) and -40ºCdp

(-40ºFdp) respectively).

As supplied, the Process Indicator is conﬁ gured to accept this 4-20 mA input, to indicate the measured dew-

point temperature in ºC and to give over-range indications with a ﬂ ashing display if the operational limits are

exceeded.

Alarm level set-points are pre-set. The default settings are -20ºCdp for Alarm 1 and -40ºCdp for Alarm 2.

Programming facilities within the Process Indicator permit the changing of some parameters.

These parameters, such as alarm levels, alarm switching logic, temperature units and analog re-transmission

current loop output range are set-up under a menu structure and are accessed by pressing the programming

key '

' on the Process Indicator's control panel.

NOTE: If a sub-menu is entered by mistake, quit by pressing the '

restored. Never try to quit with the '

Section 3 describes the set-up procedures. The ﬂ owcharts shown in Section 3 use the symbols from Table 2.3.

Michell Instruments

Pura Online Hygrometer User's Manual

This Manual describes the functions relating to the

operational requirements of the Pura Hygrometer

equipment and it is not recommended that menu

structures other than those described be entered.

' key.

SET

' key until the main display is

97303 Issue 1.2, March 2016

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