Thermo Fisher Scientific Alpha COND 200 (In the process of updating the brand guideline & product image) - Manual (Page 17)

13
6 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. ATC temperature readings can be offset
by ±10
o C.
Important: If there is no temperature element wired to controller and ATC is
selected on, screen will flash in conductivity mode, and an error message (OR) is
displayed 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 0 to 50
o C. Factory
default is 25.0 o C.
See Setup program P4.0 for instructions on ATC or MTC selection.
To offset temperature:
1.
Press MODE to select o C mode. Display shows MTC or ATC, then
temperature.
2. Key in password “011” as per procedure in Section 5.
3. The screen will flash current o C reading.
4. For ATC: Determine temperature of solution with an accurate meter (such as
the Temp 5). Press ▲or ▼keys to offset
o C value on controller display to
match value of the solution you are measuring.
For MTC: Press ▲or ▼keys to offset
o C value on controller display to
match desired value.
5. Press ENTER. The display flashes “DONE” for about 3 seconds and returns
to measurement mode.