Thermo Scientific ThermoFlex10000, Installation, Operation And Maintenance Manual

Page: 176 / 210

Section 8
8-8 ThermoFlex
Thermo Scientific
Optional Process Fluid
Flow Transducer (FLo)
Calibration
The ThermoFlex was designed to minimize the need for calibration.
However, if calibration is desired or recommended by our Sales, Service
and Customer Support, please use the following procedure.
This procedure requires a running chiller , a calibrated reference flowmeter
and an external flow control valve.
Connect a calibrated reference flowmeter to the outlet line. Using an
external flow control valve, increase the flow to a suitable high-end
calibration point. Ensure the flow is stabilized.
To enter the Calibration Loop ensure the controller display is displaying the
process fluid temperature, see the diagram on the next page. Press and hold
the and then press the key. The display will indicate
CAL
.
Press the key and the controller will display
rtd1
. Press
until the controller displays
FLo
. Press and the controller will flash
between
HiFLo
and the flow rate.
Press to adjust the rate to match the reference flowmeter.
Press the key to accept the value.
Decrease the flow to a suitable low-end calibration point (avoid a zero flow
rate). Ensure the flow is stable.
The controller will flash between
LoFLo
and the flow rate. Press to
adjust the rate to match the reference flowmeter.
Press the key and
StorE
is displayed, press to save both
values, press to not save them.
Note After pressing at the StorE prompt wait several seconds
before proceeding to ensure that a bad calibration message ( Er 16 ) does
not appear. Premature use of the keypad after pressing may
cancel the bad calibration error message.
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