3.0 301 Controller
3.3.5
Changing the Customer Calibration Type
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Start at the Home Display.
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Hold page key for 1.5 seconds to enter the set-up menu.
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Once entered, repeatedly press page key until
CL.St
is
displayed.
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Use the up and down Arrow keys to display the current cal-
ibration type.
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Use the up and down Arrow keys to display the password
screen.
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Use the up and down Arrow keys to enter the Calibration
Password (see 3.3.6).
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Press the page key to confirm password. The value will
then be stored without any further input.
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See section 3.8 for more information.
3.3.6
Calibration Password
Once entered the calibration password remains active for 30 seconds after leaving the
set up menu to allow time to revisit if necessary.
The Calibration Password for this instrument is:
525
3.4
Temperature Setpoint Ramp Rate
3.4.1
Setpoint Ramp Rate
The SPrr controls the rate at which the temperature in a furnace or oven changes per
minute. When SPrr has a numeric value, e.g. 5 °C/ min, the product will attempt to heat
or cool at that rate. When the value of Sprr = off, the product will heat or cool as quickly
as possible.
Setpoint ramp rate is useful when materials susceptible to thermal shock are being
heated.
3.4.2
Limitations of Setpoint Ramp Rate
The setpoint ramp rate should not be set higher than the maximum heat up or cool
down rate of the furnace or oven.
The setpoint ramp rate only resets its start position when the ramp rate is changed or
the controller is taken out of 'Hold' mode.
Changes in the temperature setpoint do not affect the ramp rate.
If the temperature is set below the current temperature of the furnace or oven then
after a period of time adjusted to a temperature higher than the current temperature
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