eutech-instruments alpha ph 190 18 din phorp controllertransmitter Benutzerhandbuch
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8 TEMPERATURE CALIBRATION
IMPORTANT: When Calibration mode is entered, controller automatically goes into
a “HOLD” mode where the 4-20 mA output freezes and relays are de-activated (if it
was in an activated condition). Upon return to measurement mode, both 4-20mA
output and relay activities resume, depending on settings.
This controller features selectable Automatic Temperature Compensation (ATC) or
Manual Temperature Compensation (MTC).
ATC: ATC mode requires a Pt 100 temperature element. ATC automatically
compensates for temperature fluctuations. You can offset your ATC temperature
reading by ±10
a “HOLD” mode where the 4-20 mA output freezes and relays are de-activated (if it
was in an activated condition). Upon return to measurement mode, both 4-20mA
output and relay activities resume, depending on settings.
This controller features selectable Automatic Temperature Compensation (ATC) or
Manual Temperature Compensation (MTC).
ATC: ATC mode requires a Pt 100 temperature element. ATC automatically
compensates for temperature fluctuations. You can offset your ATC temperature
reading by ±10
o
C.
Important: If there is no temperature element wired to the controller and ATC is
selected on, the screen will flash in pH or ORP mode, and you will see an error
message (OR) in temperature mode.
MTC: MTC lets you select a specific value at which temperature will be
compensated. You can select a manual temperature value from – 10 to 110
selected on, the screen will flash in pH or ORP mode, and you will see an error
message (OR) in temperature mode.
MTC: MTC lets you select a specific value at which temperature will be
compensated. You can select a manual temperature value from – 10 to 110
o
C.
Factory default is 25.0
o
C.
See Setup program P3.3 for instructions on ATC or MTC selection.
To offset temperature:
1.
To offset temperature:
1.
Press MODE to select
o
C mode. The display shows MTC or ATC, then the
temperature.
2.
Press CAL / ENTER key to directly access the offset mode when the unit is
in temperature measurement mode.
in temperature measurement mode.
NOTE: Instead of pressing the CAL/ENTER key, you can also enter the offset
mode using the password code procedure as explained in Section 5.
3.
mode using the password code procedure as explained in Section 5.
3.
The screen will flash the current
o
C reading.
4.
For ATC: Determine the temperature of your solution with an accurate meter
(such as the Temp 5). Press the ▲ or ▼
keys to offset the
(such as the Temp 5). Press the ▲ or ▼
keys to offset the
o
C value on the controller
display to match the value of the solution you
are measuring.
For MTC: Press the ▲ or ▼ keys to offset
the
are measuring.
For MTC: Press the ▲ or ▼ keys to offset
the
o
C value on the controller display to
match the desired value.
5.
Press ENTER. The display flashes “DONE”
and return to the temperature measurement
mode.
and return to the temperature measurement
mode.
22.5
25.0
done
ENTER