User Manual

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ENMET Corporation ISA 200 RAL (O)

After an invalid zero or calibration one of the following will be displayed in place of the PPM reading in the

operational display:

Table 5: Fault Alarm

Displayed Cause Possible remedy

• Fault 01

An invalid zero ·verify proper zero gas is attached to calibration port and

sample-calibration valve handle is up

·perform automatic zero

·change sensor in accordance with section 5.2

• Fault 02

An invalid calibration ·verify proper calibration gas is attached to calibration port and

sample-calibration valve handle is up

·perform calibration

·change sensor in accordance with section 5.2

• Fault 03

An invalid zero and

calibration

·verify proper calibration gas is attached to calibration port and

sample-calibration valve handle is up

·perform calibration

·change sensor in accordance with section 5.2

After this procedure is complete, return the red handle of the Sample-Calibrate valve to the down position, pointing

toward the Sample Port. If the Sample-Calibrate valve is not returned to the sample port, the low flow alarm is

activated when the calibration gas is removed.

NOTE: During the zero and span process, the sensor singles must fall within a preset limit. If they do not, the fault

codes above are generated. If a fault code 2 is generated with calibrating the CO sensor, and the span voltage is

close to, but not greater then 0.38V, an adjustment may be capable of being made, to extend the life of the

sensor. Follow the procedure foe calibrating a sensor as outlined in section 5.2.

5.1.4 Select Alarm Set Points

§ Factory alarm set points are discussed in paragraph 4.2. To change the alarm set points, after inserting a valid key,

§ Press the OPTION switch twice; "set SELECTABLE ALARMS" is displayed.

§ Press the SELECT switch; "ALARM = 0000" is displayed, with the underscore cursor under the left digit.

§ Press the OPTION switch to change the left digit; select the correct digit.

§ Press the SELECT switch to lock in the correct digit and move the cursor one digit to the right. When a valid new

alarm is selected, the "NEW = XXXX" is displayed.

§ Press the OPTION or the SELECT switch, and the display changes to the next sensor. After all sensors have been

displayed, the display returns to the " set SELECTABLE ALARMS" position.

Valid alarm ranges are as follows:

• CO: 5 to 99 ppm

• The oxygen alarm set points are 19.5% for deficiency and 23.5% for abundance, and are not adjustable.

From Full Calibration

Example: Selectable Alarms Flow Chart

O = Option Switch

S = Select Switch

S or O

ALARM=0000

set CO Alarm

set SELECTABLE

ALARMS

Changes digit indicated by

underscore cursor

Locks underscore digit and

moves cursor to next digit

Exit Maintenance Mode

NEW=0000

To Set Latches

Invalid entry