KeyPad
Version 1.0
SCP SCIENCE
53
Next, ensure that DigiPREP controller is set
to the correct settings for controlling DigiPREP
block in use. (HT for all of DigiPREP HT high
temperature digestion blocks) With the controller’s
power switch in the “off” position, verify the following:
• Voltage selector switch on the back of the
controller is properly set to 230 volts.(The Colour
Touch Screen & KeyPad do not have a voltage
selector
)
• Connect the blocks umbilical cord to the
controller.
Disconnecting or reconnecting the
umbilical cable while the controller is
turned on, especially while it is
on the RUN screen, will likely result
in permanent damage to the
instrument.
• Connect the power cord to the back of the
controller.
• Connect the DigiSET dongle to the back of
thecontroller.
DigiSET is not typically used with
the DigiPREP HT Digestion blocks.
The system is now ready to be
plugged in and turned on. Consult
the controller manual for
programming and operation
instructions.
DUAL PROBE OPTION
The dual PROBE may be retrofi tted in the fi eld
or may have come factory installed. This option
allows the lab to verify the DigiPREP HT block
temperature independently of the DigiPREP
Controller used. The dual PROBE contains two
separate RTDs in one sheath; one sensor is
connected through the umbilical cord to the
DigiPREP controller to monitor and control the block
temperature. The second RTD PROBE is connected
to the 2 pin connector on the back of the DigiPREP
HT system to allow for the monitoring of
the precision of block controller display temperature.
(Or the correct size hole may be made to house the
panel mount connector for fi eld installation). The 2 pin
female connector on the back of the DigiPREP HT
system is supplied with a mating cable with
two bare ends. This cable is to facilitate the
connection of the second PROBE sensor to an
instrument capable of reading a 100 RTD. If
an Ohm meter is being used, the typical value at
100°C is 138.5, and for 380°C the resistance
value is 240.13 (see table page 61.) It is
recommended to use a certifi ed controller capable
of measuring a temperature from 100 ohms platinum
RTD. (0.00385 factor)
The tolerance of the temperature PROBEs used
on the DigiPREP HT systems is of a ‘Class A’
specifi cations. A typical variation at 100°C is ±
0.15°C and at 400°C is ± 0.95
o
C.
Parts for the Dual PROBE Option (fi eld installation)
complete with mating cable.
NOTE
WARNING
Field installation kit
Mating Cable
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