Overview; Keypad And Display - Thermo Scientific ALPHA PH 1000 Manual

4

OVERVIEW

4.1

Keypad and Display

4.1.1 Keypad
• 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
• Return to the Measurement mode when both keys are pressed together
• Return to the Measurement mode when both keys are pressed together
• Switch beween AUTO and MANUAL relay operation mode
• 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
Display
4.1.2
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.
SETUP MEAS CAL CON
7.00
READY
pH
HOLD
ERR
°C
25.0
ATC
• 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.
• 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
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