Watlow Series 922 Retrofit Manual de usuario descargar pdf (Pagina 74)

WATLOW Series 922 User's Manual

Alarms

How To Use The Alarms , Chapter 7

Figure 37 -

Alarm Limits for

Alarms 1 and 2 with

"Deviation" Type

Alarm (ALTYP=D,

ALTYP=D)

NOTE: Only Chan-

nel 1 is shown here.

Temp

SP1

Actual

0°C

Time

AL 2

AL 1

AH 2

AH 1

New SP1

A1L

A1H

Time

Alarm Function, Latching or Non-Latching

Alarm function is either "latching" or "non-latching." Latching is a means of

"saving" indication of an alarm event for the operator to clear manually. A

latching alarm requires the operator to manually clear it with the ENTER key

when ACTUAL returns to within the limits. A non-latching alarm clears itself

automatically when ACTUAL returns to within the limits. It's your choice.

Here again is the "LAT" information from the Operating Parameters:

LAT Defines Alarm Function:

NLAT = Non-latching. Alarm relays are automatically energized when

ACTUAL temperature returns to within the operating band (as defined

by ALTYP X, AXL and AXH).

LAT = Latching. Requires the ENTER key to manually energize alarm

relays after ACTUAL temperature returns to within the operating band

(as defined by ALTYP X, AXL and AXH).

To clear an alarm in the RUN mode, simply press ENTER. To clear an alarm

in the HOLD mode, return to the SYSTEM prompt. Press the MODE key until

CLR ALRM is displayed and press ENTER.

1 2 ... 69 70 71 72 73 74 75 76 77 78 79 ... 126 127

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Watlow Series 922 Retrofit Manual de usuario Pagina 74