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ATI A15/66 Residual Sulfite Monitor

O&M Manual

Rev-W (8/10)

CONFIGURATION

The electronics for the sulfite system are designed to be as flexible as possible. A number of

programming functions are provided in the CONFIGURATION menu and are protected by an access

number, which must be entered to allow changes in these settings. Some settings are for factory use

only, while others are used for customer selection of certain operating parameters. The access number

protecting the configuration is user adjustable. When shipped from the factory, the default access

number of “0” is stored in the unit.

To enter the configuration menu, press the MODE key until the display reads CONFIGURATION

and then press CAL. The display will read "KB UNLOCKED (OR LOCKED)". Press ENTER twice and

the display will read "ACCESS NR.: 0". Press the ENTER key and the first menu item will appear on the

display. If a new access number has been programmed into the unit, press the UP or DOWN keys until

that access number is displayed and then press ENTER.

1. INPUT SOURCE: SO3 Factory setting. No adjustment should be made. Press ENTER to go to the

next display.

2. RANGE: 2/20 PPM Factory setting. No adjustment should be made. Press ENTER to go to the next

display.

3. SCALE: 20.00 (OR 2.000) PPM This routine allows programming of the operating range of the

instrument. Use the UP key to select either 2.000 OR 20.00 to select the full scale operating range.

Then press ENTER. The default value is 20.00.

4. AUTORANGING: OFF Factory setting. No adjustment should be made. Press ENTER to go to the

next display. If operating in the low range, turning Autoranging on allows the operator to read values

if they exceed 2.000 PPM.

5. LARGE S RT: 2.0s This routine allows for electronic damping of the analog output signals. This

monitor contains a 2-stage response time filter. This allows the instrument to change rapidly in

response to a large concentration change while changing only slowly when the variations are small.

The “LARGE S RT” refers to the response time to a large variation, usually above 1 PPM. The

default setting is 2 seconds. This value can be increased to as much as 20 seconds by using the UP

arrow.

6. SMALL S RT: 10.0s This routine allows for electronic damping of small changes in the input signal.

This eliminates rapid changes in the display due to minor variations in concentration. The default

setting is 10 seconds. This value can be increased to as much as 20 seconds by using the UP arrow.

7. CAL POL.: 0 mv. Factory setting. No adjustment should be made. Press ENTER to go to the next

display.

8. MODE OF CAL: IMM. This routine allows the operator to select the method to be used when

calibrating the monitor. The default is IMM., which stands for "Immediate Calibration". Press the UP

key to toggle to POST, which stands for "Delayed Calibration". The difference between immediate

and delayed calibration methods are described in detail in the Calibration section of this manual.

While immediate calibration is the default, delayed calibration is often a more useful calibration

method.

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Analytical Technology A15 Spécifications Page 23