Enmet SPECTRUM ON-LINE Manual do Utilizador descarregar pdf (Página 6)

ENMET Corporation Spectrum ON-LINE

1.2 Turn the instrument ON

Turn the instrument ON, by plugging the power supply into a standard 110 VAC wall outlet. In uncontaminated air,

for most instruments the display should read 0000 within ten seconds of turn-on. For an oxygen S

PECTRUM ON LINE,

the display reads near 20.9%.

OTE: Instruments using biased sensors, this time is extended to 4 minutes, stabilization may take as long as 1 hour.

See Table 1.

1.2.1 Verify

The SPECTRUM ON LINE is calibrated prior to shipment. However, if the target gas is available, expose the sensor to it

to verify that no damage occurred during shipment.

1.2.2 Acknowledge alarm

If the concentration of the target gas is greater than the alarm set point, the instrument indicates an alarm condition.

Acknowledge the alarm by pressing and releasing the right hand pushbutton, SELECT; this silences the audio alarm

for four minutes unless the concentration of the target gas is greater than the upper alarm limit. See Table 1 for a list

of alarm set points and upper alarm limits for various target gases.

1.2.3 Remove gas

Remove the source of the target gas. After the display reads zero or close to it, unplug the instrument.

1.2.4 Contact ENMET

If the instrument does not operate as described, contact ENMET customer service personnel immediately.

2.0 Features and Installation

2.1 Features

The features of the SPECTRUM ON LINE are shown in Figure 1. These are:

DISPLAY An LCD upon which either the gas concentration, or prompts for the operational and maintenance

menus, are given.

PUSHBUTTON

SWITCHES

There are two of these, as follows:

•OPTION The left hand switch.

•SELECT The right hand switch.

These switches are used to access and utilize the operational and maintenance menus.

SENSOR HOUSING A small cylindrical turret on the display surface; the membrane of the electrochemical sensor is

exposed to the atmosphere through the hole in the turret.

VISUAL ALARM A red LED which is ON whenever the target gas concentration is above the alarm point.

AUDIO ALARM A small horn, which is ON whenever, the gas concentration is above the alarm point, until the

alarm is acknowledged.

COVER Retained with four screws and removed to change the sensor and access the terminal strip.

RELAY CONTACTS On a terminal strip inside the enclosure.

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