Instruction manual

MODEL XMT-A-FF/FI SECTION 11.0

CALIBRATION - TOTAL CHLORINE

11.3 PROCEDURE — FULL SCALE CALIBRATION

1. If the sensor was just zeroed, place the reagent uptake tube back in the bottle. Once the flow of reagent starts,

it takes about one minute for the sensor current to begin to increase. It may take an hour or longer for the read-

ing to stabilize.

2. Adjust the chlorine concentration until it is near the upper end of the operating range. Wait until the transmit-

ter reading is stable before starting the calibration.

3. Press MENU. The main menu screen appears. Choose Calibrate.

4. Choose Chlorine.

5. Choose InProcess.

6. The screen at left appears for two seconds.

7. The screen at left appears. The number in the first line is the concen-

tration of chlorine based on the previous calibration. Wait until the read-

ing is stable, then press ENTER.

8. The screen at left appears. Take a grab sample of the process liquid

and immediately press ENTER. The transmitter will store the present

sensor current and temperature and use those values in the calibration.

9. Immediately determine the total chlorine concentration in the sample.

10. Use the arrow keys to change the value in the second line to match the

results of the laboratory test. To return to the main display press MENU

then EXIT.

11. This screen appears momentarily if the sensitivity (sensor current divid-

ed by concentration) is much higher or lower than expected. The dis-

play then returns to the screen in step 5. See Section 15 for trou-

bleshooting.

Cal?

Chlorine

Temp

Calibrate

Sim. PV

Program Display

Cal?

InProcess

Zero

Wait for

Stable reading.

Stable? 1.00ppm

Press enter.

Take sample;

Press enter.

Sample 1.00ppm

Cal 1

.00ppm

Calibration

Error