Thermo Fisher Scientific Alpha pH 1000 - Manual (Page 13)

8
4.3 Control Concept
The main function and sub-function groups are organised in a matrix format as shown below.
These functions can be accessed via the front keypad for configuration and selection of
parameters.
MEASURE
OFFSET
SET C O
SET-POINT 2
SET-POINT 1 Set value 1
Switch On/Off ATC
Set Offset
Process temp.
(MTC)
MIN / MAX Function
Set value 2 Hysteresis 2
Calib. temp.
(MTC) Calibrate Pt100
Pick-up delay
contact 1
Dropout delay
contact 2
MIN / MAX Function
Hysteresis 1
Pick-up delay
contact 2
Dropout delay
contact 1
CONFIGURATION
CALIBRATION Calibrate
1st value Display zero point
and slope
Calibrate
2nd value
MEASUREMENT
RANGE
CONTROLLER Controller type N.O. / N.C.
Contact
Current output
0.20 / 4.0 mA
Cycle time bzw.
Max. Frequency
pH / ORP
at 0/4 mA
Proportional
range XP
pH/ ORP Symm.
/ Asymmetrical
Alarm delay Electrode type
Glass/Antimony
Alr
Alarm contact
cont./wiper contact
Cln 1000
Dur
Reset to factory
default settings
CODE
The controller offers two levels of password protection: (1) for direct access to calibration
function and (2) for setting or editing specific controller parameters or functions in the SETUP
mode to suit individual requirements.
Note: The passwords are not user-defined and have been set by factory. It is very important to
keep these passwords strictly confidential to avoid unauthorised tampering of the system at
all times.
Note:
If the user reads parameters only, the controller automatically reverts to Measurement mode
if no key is pressed for 30 seconds.