Analytical Technology A15 Specifikace stáhnout pdf (Strana 21)

ATI A15/66 Residual Sulfite Monitor

O&M Manual

Rev-W (8/10)

OPERATING MODE

The A15/66 is provided with 3 programmable modes of operation. The default mode is AUTO. In

this mode of operation, the display indicates both sulfite concentration and alarm status as described

above. The second mode of operation is MEAS. (Measure Only). In this mode, the display indicates only

residual sulfite, and the control relays are deactivated. This would be the mode to use if relays are not

being used for alarm or control functions. The third mode is SIM. (Simulate), which allows the analog

output and relay outputs to be cycled manually. In the SIM mode, the UP and DOWN keys can be used

to adjust the sulfite value shown on the display to any value desired. The analog output will track this

changing value, and alarm relays will activate if the display value is set above the alarm setpoint. This

mode would normally only be used for control system troubleshooting.

The mode of operation is selected by using the programming keys on the front panel. Select the

mode of operation as follows:

1. With the display in normal mode as shown above, press the CAL key once. The display will read

"CAL MODE: AUTO".

2. Use the UP or DOWN key to select the desired mode of operation. Then press ENTER. If the mode

is changed, the message "UPDATE" will flash on the display briefly and the unit will return to the

normal operating display.

FRONT PANEL LOCK

The key switches on the front panel of the monitor can be used for both changing the display and

for calibrations and setpoint adjustments. When the monitor is shipped from ATI, all functions are

accessible. However, the adjustment and calibration functions can be locked in order to prevent

unauthorized adjustments to the instrument. When the front panel is locked, the MODE key will still allow

the display to be stepped through the alternate displays but will not allow settings to be altered.

To lock (or unlock) the keyboard, press the MODE key until "CONFIGURATION" is displayed.

Press the CAL key once and the display will change to "KB UNLOCKED". Use the UP key to select "KB

LOCKED" and press ENTER. The UPDATE message will appear briefly and the "LCD CONTRAST"

message will appear. Press the MODE key 3 times to return to the main display.

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Analytical Technology A15 Specifikace Strana 21