Thermo Fisher Scientific Alpha DO 500 - Manual (Page 34)

Instruction Manual Alpha DO 500
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5.6 Hold Settings
When you switch the Transmitter to calibration mode or setup mode, the transmitter
goes to the ‘HOLD’ status (indicating ‘HOLD’ in the display) and freezes the current
output at a specific value. Hold setting allows you to define the output current of the
Transmitter when the Transmitter is in ‘HOLD’ status.
ENT
SETUP
HOLD
1
ENT
SETUP
HOLD
2
SETUP
HOLD
2
ENT
1 1
From measurement mode press ENT key to enter setup mode as
described in section 5.1. The LCD shows the first screen of setup mode
(COF). Press Ÿ or ź key to select hold settings screen (SEt HLd).
Press ENT key to access hold settings (SEt HLd).
2
The upper display shows ‘HLd’ and the lower display shows the last
configured hold setting (‘On’ or ‘OFF’). Press Ÿ or ź key to select the
required choice for hold.
- Select On to freeze the current output at 22mA
- Select OFF to freeze the current output at its last measured value.
NOTE: The last current output value depends on the last measured DO
reading and the range settings defined in the section 5.5
Press ENT key to confirm your selection. The Transmitter reverts to SET
HLd screen.
Press Ÿ or ź key to access other setup screens or press Ÿ and ź key
simultaneously (escape) to return to measurement mode.