ThermoFlex-Manual - 第63页
Section 4 ThermoFlex 4-5 Thermo Scientific SP xx.x C xx.x C mode enter enter Setpoint Loop ( ) • Ensure t he contr oller is either a blank screen or displaying the process uid tem peratur e . • Press the key and the cont…
Section 4
4-4 ThermoFlex
Thermo Scientific
mode mode
mode
mode
Controller Loops
The controller has the capability to display various loops which indicate
operating conditions and parameters. The loops are selected and changed
by pressing the appropriate keys.
When the controller is rst powered up it goes through a short
initialization (~15 seconds) and then displays the process uid temperature.
Use the key combination shown below to scroll through the loops.
SP is the Setpoint Loop and is used to display and change the setpoint.
The setpoint is the desired process uid temperature needed for your
application. The Setpoint Loop is accessed by pressing the
key, see
next page.
SEtuP is the Setup Loop. The Setup Loop allows you to display and/or
alter different parameters of the controller. The Setup Loop is accessed
from the SP display by pressing the
key.
diA is the Diagnostic Loop. The Diagnostic Loop allows you to display
the operating times for various components. The Diagnostic Loop is
accessed from the Setup display by pressing the
key, see Section 6
for more details.
Note The loops can be accessed and changed without the chiller running
as long as the circuit protector (ThermoFlex900-10000s) is in the on
( I ) position.
Figure 4-3 Controller Loops (Chiller running)
SP
SEtuP
diA
xx.x C
Figure 4-4 Controller Loops (Chiller not running)
mode mode
mode
mode
SP
SEtuP
diA
Section 4
ThermoFlex 4-5
Thermo Scientific
SP
xx.x C
xx.x C
mode
enter
enter
Setpoint Loop
( )
• Ensure the controller is either a blank screen or displaying the process
uid temperature.
• Press the
key and the controller display will alternate between SP
and the setpoint value.
• If no change is required press the
key to return the controller to
the previous display.
• If a setpoint change is required, use the
keys.
The setpoint range is +5°C to +40°C (41°F to 104°F).
Note If the are not used within one minute the controller will time
out and return to the previous display, any changes will not be saved.
• Once the desired value is displayed press the key to conrm the
change.
• The controller will return to the process uid temperature display or a
blank screen.
indicates the controller
display is alternating between the
two displays.
Figure 4-5 Setpoint Loop
or
Section 4
4-6 ThermoFlex
Thermo Scientific
Setup Loop
( )
Use the Setup Loop to adjust/verify the following controller settings.
• Scales: temperature in °C or °F, ow in liters per minute or gallons per
minute (only chillers with an optional ow transducer), and pressure in
PSI, bar or kPa
• High and low temperature alarm limits
• High and low pump discharge pressure alarm limits and time delays
• Chiller reaction to a temperature, pressure or ow (optional) alarm limit
(continue to run or shut down)
• Audible alarm enabled/disabled
• View/change the fan speed (ThermoFlex2500 air-cooled only)
• Auto restart feature enabled/disabled
• Preventive care cleaning frequency reminder for air and uid lters
Optional Features:
• Global voltage
• Analog I/O
• Auto rell alarm
• DI lter cartridge preventive maintenance interval
• High/low ow alarm limits
• Serial communications
• Anti drainback valve position
• Save or not save
all
changes
To enter the Setup Loop ensure the controller display is either a blank
screen (chiller off) or displaying the process uid temperature. Press the
key and the display will indicate SP, press it again to display SEtuP.
Press the
key to continue, or press twice to return to the
process uid temperature or blank display.
Use
to sequence down through the loop. Use to
sequence back through the loop up to the Hi t display, see next page.
To change any parameter:
Press the
key.
Use the keys to change a displayed value.
Press
key to conrm the change and bring up the next display.