Rki-instruments M2A Instrukcja Użytkownika Pobierz pdf (Strona 33)

M2A Transmitter Operator’s Manual 28

Alarm Indications

NOTE: The M2A includes alarm on and alarm off delay settings for alarm 1 and alarm 2. The

alarm indications described in this section operate according to the factory set alarm

settings. See Table 6 on page 32 for all the factory settings.

NOTE: You can select normally energized (N. EN) or normally de-energized (N. DE-EN)

alarm 1 and alarm 2 relay settings in Configuration Mode. The following sections

describe the standard factory setting for these relays which is N. DE-EN.

The fail relay is factory set as N. EN and is not user-adjustable.

Alarm 1 Condition

Alarm 1 Condition Indications

When the gas reading reaches the alarm 1 setpoint, the M2A senses an alarm 1 condition. The M2A

alerts you to an alarm 1 condition as follows:

• The A1 LED turns on.

• The gas reading alternates with the ALARM-1 message.

• The alarm 1 relay energizes.

Responding to an Alarm 1 Condition

1. Follow your established procedure for a low level combustible or toxic gas condition or a

decreasing oxygen concentration condition.

2. After the gas reading falls below (above for oxygen) the alarm 1 setpoint, press the ENTER

button to reset the alarm 1 circuit. Resetting the alarm 1 circuit turns off the A1 LED, resets the

Table 5: Visual and Audible Alarm Indications

Condition Cause Visual Indication(s)

Alarm 1

Increasing (decreasing for O

) gas reading at

or above the alarm 1 setpoint

• A1 LED is on

• Gas reading alternates with

ALARM-1 message

Alarm 2

Increasing gas reading at or above the alarm 2

setpoint

• A2 LED is on

• Gas reading alternates with

ALARM-2 message

Fail • Disconnected or misconnected detector

wiring

• Display reading at -10% of full scale or

lower

• Defective components

• F LED is on

• FAIL message replaces gas

reading

NOTE: There is a 30 second delay

on the fail condition.

Low Power DC power source less than 9.5 volts. • F LED is on

• LowPower message and actual

voltage of incoming DC power

If the M2A is in both an alarm 1 and an alarm 2 condition, both alarm LEDs are on and the

display alternates between the gas reading and the ALMS 1&2 message.

1 2 ... 28 29 30 31 32 33 34 35 36 37 38 ... 74 75

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