Eppendorf New Brunswick -86 °C Freezers Innova U360 - Manual (Page 29)

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Innova® U360 -86 °C Freezers — Operating manual
6.8 PS2 service data ports
The freezer is equipped with two PS2 data ports. They provide the ability for service personnel to
record information from the operating system and to upload revisions to the system’s firmware.
6.9 Voltage stabilizer
The U360 freezer (model 120 V, 60 Hz) has the option of an internal voltage stabilizer.
The optional internal voltage stabilizer automatically compensates for variations in the supply
voltage (in case of over-voltage, brown-outs, dips, sags and surges). The output is only switched
if the power disturbance is sustained for at least two seconds. (see Installing the voltage stabilizer
on p. 14).
The voltage stabilizer unit indication is displayed on the lower left front panel of the U360 freezer.
(see Fig. 1 on p. 10).
When you switch the freezer on, if the input voltage is within the specified range, the green LED
NORMAL will illuminate. If the voltage stays within the specified range, the green LED will remain
illuminated.
Sustained variations in the input power will be automatically compensated for by the stabilizer
circuit and indicated by a red LED for HIGH voltage or an amber LED for LOW voltage.
DIAG Screen
Button
Description
ENG This button is ONLY for use by qualified service personnel. It requires a
factory-set password.
CALC = Pressing this button allows the user to quickly view historical minimum and
maximum (HI and LO) temperatures and to view compressor cycle run times
over a period of 1, 2, 3 or 6 hours, by sequentially pressing the button.
TEST Pressing this button allows the user to verify the function of the audible alarm
and the alarm socket relay.
DEFAULT Pressing this button quickly reverts all adjustable setpoints to the factory
setpoints. This action does NOT delete USER ID or PASSWORD information,
graph data or alarm log data.
EXIT Pressing this button returns you to the DATA LOG screen.
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