Calibration (Parameters /Cc To /Cr); Backup Battery; Temperature Monitoring - Thermo Scientific TSG Series Installation Manual

Calibration (parameters /
cc to /cr)
The controller offers the possibility to calibrate values read by
the probes. In particular, parameters /cc to /cr are used to
increase or decrease the values read by the probes
connected to the analogue inputs, consistently with the unit of
measure.
/cc is the control probe calibration offset. The difference in
temperature between the control probe value and the average
compartment temperature that is used to control the cooling
system to the unit setpoint during steady state operation. All
units are provided with a factory default setting for optimal
cooling control. This can be useful to adjust if there is a
discrepancy between the unit setpoint and the average
cabinet temperature.
/cr is the product probe calibration parameter. The difference
in temperature between the display probe value seen on the
User Interface display and the average compartment
temperature at the unit setpoint during steady state operation.
All pharmacy units are provided with a factory default setting
for the display to provide accurate reading compared to the
average cabinet temperature. This can be useful to adjust the
display during unit calibration procedures.
CAUTION: This modification may not be allowed
by site procedures as it alters the measured
value. Verify that you have permission to make
the modification.
T1 Temperature read by the probe
T2 Calibrated temperature
A Calibration offset
min, Field of measurement
max

Backup battery

The controller can manage an external backup battery. This
ensures some minimum controller functions when no power is
available, and signals anomalous operation in the event of a
22 | Operation
blackout. During normal operation, the controller recharges
the battery and performs a test every 24 hours to verify
correct operation. The test can also be run manually by
pressing a button or via the direct function. Activation of the
backup battery can be disabled when the unit is in storage
using the boF parameter turned ON within the direct
functions. The following battery is supplied with the unit:
lead-acid VRLA, 6V, maximum discharge current 200 mA.
Typical charging current is 30 mA (maximum
50 mA).
CAUTION: A 500 mAT slow-blow fuse (is
included) in series with the battery.
Table 12. The table shows the operation of the
user interface and the various devices in the event
of a power failure:
Function Behaviour with power failure
The digits go off and only the
decimal point remains flashing.
Display
Pressing PRG reactivates the
standard display for the time bbd
Button
backlighting PRG button only
(if present)
Icons Service icon only flashing
Will be on during alarming and will
silenced by pushing the program
Buzzer
icon, after 30 minutes the buzzer will
reactivate.
Relays All disabled
The power failure is signalled by
Alarms alarm BLC, visible only by pressing
PRG
Notice: In the event of temperature alarms, these are
signaled as normal, even in the event of a power failure.

Temperature monitoring

The controller can record the minimum value rL and
maximum value rH read by the product probe for pharmacy
units and the control probe for the standard units. The
monitoring session can be reset at any time, after which the
new maximum and minimum values are logged.
See the "Action in Direct Access Mode" for more details.
Laboratory & Pharmacy Refrigerators