Electro-Chemical Devices (ECD) T80 - Manual (Page 42)

(50%) solution, 1425 mg/L and one liter of deionized water (0%). Start the calibration in the deionized water in
the calibration cup and accept 0.00 mg/L when prompted, then put the sensor into the 1425 mg/L solution and
enter 1425 mg/L when prompted and finally into the 2850 mg/L solution and enter 2850 mg/L. Accept the
calibration and put the sensor back into the process.
Sensor Measurement Ranges Low Calibration Values High Calibration Values
0-250 NTU and 0-1000 NTU 0 NTU, 125 NTU, 250 NTU 0 NTU, 500 NTU, 1000 NTU
0-500 NTU and 0-2000 NTU 0 NTU, 250 NTU, 500 NTU 0 NTU, 1000 NTU, 2000 NTU
0-1000 NTU and 0-4000 NTU 0 NTU, 500 NTU, 1000 NTU 0 NTU, 2000 NTU, 4000 NTU
0-2000 NTU and 0-4000 NTU 0 NTU, 1000 NTU, 2000 NTU 0 NTU, 2000 NTU, 4000 NTU
4.6.1 AUTO C
AL
The TRITON® TR6 turbidity sensors use a three point AUTO Cal sequence. Cal 1 is a zero point calibration, Cal 2 is
a 50% of the measured range calibration and Cal 3 is a 100% of range calibration.
Action Prompt
Double Press any Button MENU HOME, Hold is OFF
Press HOLD Hold freezes 4-20 mA Output and locks Alarm Relays during Calibration
Press CAL Is this a new Sensor? (Yes erases CAL Log in INFO, NO adds CAL to existing Log)
Press YES/NO Place Sensor in 0.00 NTU (or FNU, mg/L, ppm, % Solids)CAL Solution
Press AUTO (CAL 1) STABILIZING, xx.xx NTU x.xx V, 0.00 NTU corrected Accept Cal 1?
Press YES Place sensor in 50 % solution
STABILIZING, 492.0 NTU 1.18V, 500.0 ppm corrected, Accept Cal 2?
Press YES/NO If suggested corrected value is not correct press NO, Enter CAL 2 Value
Press ▲ ▼ NEXT xxxx.x NTU (use arrows and NEXT keys to enter Cal value)
Press OK xxxx.x NTU, xxx.x V, 500.0 NTU corrected Accept Cal 2?
Press YES Place sensor in 100% solution
STABILIZING, 1000 NTU 2.46V, 1000.0 ppm corrected, Accept Cal 3?
Press YES/NO If suggested corrected value is not correct press NO, Enter CAL 3 Value
Press ▲ ▼ NEXT xxxx.x NTU (use arrows and NEXT keys to enter Cal value)
Press OK 1000 NTU, 2.46 V, 1000.0 NTU corrected Accept Cal 3?
Press OK Calibration complete, returns to Cal Menu
Press HOME Hold is ON
Press HOLD Turn off Hold
Press EXIT Main Display
4.6.2 S TANDARDIZE
Standardize is an online/in process Zero Point Calibration Only. To change a non-zero value to a new value use
the Slope feature in the Manual Cal section. (see below) Standardize is used to zero out the reflectance effects
generated by the installation. The sensor will generate a mV signal in a zero NTU environment and this will be
different than the zero point value recorded in the AUTO Cal. Standardize shifts the calibration curve to the new
zero value. Perform a Standardize calibration with the sensor installed in the process line or tank and immersed
in clear water only.
Action Prompt
Double Press any Button MENU HOME, Hold is OFF
Press HOLD Hold freezes 4-20 mA Output and locks Alarm Relays during Calibration
Press CAL Place Sensor in Air or with the sensor in the process solution
Page 41 Model T80