Falcon HED241 Manual Del Usuario página 3

SETUP
To set up the instrument in the following ways, you need to make connections across the
solder pads illustrated on the drawing of solder pads and connections. To make a semi-
permanent installation, make a solder bridge across the required pads or, for a more
adaptable installation, wire the pads out to switches. To determine:
whether the internal temperature sensor
is to be used or whether the instrument is
to read an external sensor
whether the temperature is to be sampled
every second or every 10 seconds
whether the temperature is to be
displayed in °F or °C
Temperature Set Points
1 Ensure that sampling is selected for 10s (solder pads unconnected) because
temperature set points cannot be adjusted when 1s sampling is selected.
2 Ensure that temperature mode is engaged (that is, that PB5 is not making a
connection).
3 Connect and hold PB7 and operate PB2 until the required LOWER set point is
displayed.
4 Connect and hold PB6 and operate PB2 until the required UPPER set point is
displayed.
5 Set the sampling rate to the required value.
Note:
When using the internal sensor and the LED backlight, the sensor may be affected by the
heat generated by the backlight. You can avoid the problem by using an external sensor
(TH 103 available as an option).
Setting the Time
1 Ensure that time mode is engaged (that is, that PB5 is making a connection).
2 Operate PB1 to adjust hours and PB2 to adjust minutes.
Application Notes for Refrigeration Thermostat (page 17)
In the illustration, SW1 is a single pole, 4 position slide switch.
The thyristor is turned on if the monitored temperature is greater than the upper and
lower setpoints. The temperature is maintained by turning on the thyristor when the
monitored temperature is greater than the upper setpoint and turning it off when the
temperature reaches the lower setpoint.
connect between INT or EXT and the
solder pad between them. Do not have
both connected at the same time.
connect the 10s/1s pads for sampling every
second or leave them open for sampling
every 10 seconds.
connect the appropriate pads for °F display
or leave open for °C
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