alpha-pH 1000
6
4 OVERVIEW
4.1
Keypad and Display
4.1.1
Keypad
C A L
•
Perform rapid 2-point calibration
•
Allows entry to Set up mode
•
Select individual functions within the function group of Set up mode
•
Store input data in the Set up mode
•
Start calibration in the calibration mode
•
Select various function groups in the Set up mode.
•
Set parameters and numerical values in sub functions of Set up mode
If pressed continuously, the setting speed increases
•
Control the relays in the MANUAL function
•
Return to the Measurement mode when both keys are pressed together
•
Switch between AUTO and MANUAL relay operation using a code
•
Display limit set-point values for the switch contacts in AUTO relay operation mode
•
Switch between RELAY A and RELAY B in MANUAL relay operation mode
4.1.2 Display
The LCD display features two numerical displays that show status messages and measured values for
easy, quick reference. The display provides short-text information for setting parameters and
configuration.
7.00
25.0
ATC
SETUP
HOLD
CAL
MEAS
CON
READY
pH
ERR
o
C
••••
MEAS: Measurement mode
••••
SETUP: Set-up mode of function groups
••••
CAL: Calibration mode of pH/ORP and temperature
••••
READY: Comes on after a successful calibration
••••
HOLD: Relay position and current output are frozen
••••
ATC: Comes on in the ATC mode. Disappears in the
Manual temperature Compensation mode.
“ATC” flashes if the temperature probe is faulty in its ATC
mode
••••
ERR: Error or alarm indicator
•
Display for RELAY A/B. Green LED indicates measured value within limit while
RED LED indicates measured value outside limit.
•
Alarm display if limit value overshoot or the ATC probe fails; with ERR annunciator
appears on the display. Wash display if cleaning cycle is on.
