Electro-Chemical Devices (ECD) T80 - Manual (Page 34)

4.1
P
H C
ALIBRATION
P
ROCEDURES
AUTO Calibration recognizes pH 4.01, pH 7.00 and pH 10.00 buffer solutions for automatic, temperature
compensated calibrations. Any calibration solutions can be used but the pH value will have to be entered
manually. Follow the steps below to accomplish a pH calibration. Example uses pH 7.00 and pH 4.01 buffers.
4.1.1 AUTO C AL USING P H 4.01, 7.00, 10.00 BUFFERS
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 CAL Solution ( use pH 7.00 buffer)
Press AUTO then CAL 1 STABILIZING, 7.00 pH x.x mV, 7.00 pH corrected Accept Cal 1?
Press YES CAL1 Value 7.00 pH, Continue to CAL2? Move sensor to 4.01 pH buffer solution
Press YES STABILIZING, 4.00 pH xxx.x mV, 4.00 pH corrected Accept Cal?
Press YES OFFSET: 7.00 pH x.x mV, SLOPE: 59.16 mV/pH (data written to Log)
Press OK Calibration complete
Press HOME Hold is ON
Press HOLD Turn off Hold
Press EXIT Main Display
4.1.2 AUTO C
AL USING OTHER P
H
BUFFERS
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 CAL Solution
Press AUTO then CAL 1 STABILIZING, xx.xx pH x.x mV, 7.00 pH corrected Accept Cal?
Press NO Enter CAL 1 Value
Press ▲ ▼ NEXT xx.xx pH (use arrows and NEXT to enter pH Buffer value)
Press OK xx.xx pH, xxx.x mV, Accept this Value
Press YES CAL 1 Value xx.xx pH, Continue to CAL 2? (Place Sensor in 2 nd calibration buffer)
Press YES STABILIZING, xx.xx pH xxx.x mV, 4.00 pH corrected Accept Cal?
Press NO Enter CAL 2 Value
Press ▲ ▼ NEXT xx.xx pH (use arrows and NEXT to enter pH Buffer value)
Press OK xx.xx pH, xxx.x mV, Accept this Value
Press YES OFFSET: xx.xx pH x.x mV, SLOPE: 59.16 mV/pH (data written to Log)
Press OK Calibration complete
Press HOME Hold is ON
Press HOLD Turn off Hold
Press EXIT Main Display
4.1.3 S
TANDARDIZE
Leave the sensor in the process solution, take a grab sample from the process and determine the pH or place
sensor in a calibration standard solution.
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
Page 33 Model T80