Thermo Fisher Scientific Alpha DO 1000 - Manual (Page 14)

6
4 OVERVIEW
4.1 Keypad and Display
4.1.1 Keypad
• Perform rapid 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.
MEAS CAL SETUP HOLD
ppmt
mg/l
%
ATC
° C
READY -8.8.8.8
-1.8.8.8
• HOLD: Relay position and current output are frozen
• SETUP: Set-up mode of function groups
•
MEAS: Measurement mode
•
CAL: Calibration mode of Dissolved Oxygen
•
READY: Comes on after a successful calibration
• 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
• 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 connection is broken.