Thermo Electron 900 Series, Руководство по эксплуатации и техническому обслуживанию

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d. Remote Alarm Contacts
The remote alarm provides a NO (normally open) output,
a NC (normally closed) output and COM (common). The con-
tacts will trip on a power outage, high temperature alarm or low
temperature alarm. Figure 1-8 shows the remote contacts in
alarm state.
e. Attaching the Power Cord
Insert the power cord into the power inlet module. Place
the retaining bracket (p/n 195763) over the connector. Tighten
retaining screws to secure.
f. Connecting the Unit to Electrical Power
See the serial tag on the side of the unit for electrical specifi-
cations or refer to the electrical schematics in this manual.
The freezer should be operated on a dedicated grounded
service. Check the voltage rating on the serial tag of the unit
and compare it with the outlet voltage. Then, with the power
switch turned off, plug the line cord into the wall outlet.
First, turn on the freezer power switch. Then open the
lower front door by grasping the bottom left corner. Locate the
battery switch and turn it on. See Figure 1-5. During initial
freezer start-up, the system battery may require charging and
the Low Battery indicator may illuminate.
1.6 Freezer Start-Up
With the freezer properly installed and connected to power,
system set points can be entered. The following set points can
be entered in Settings mode: Control temperature, high temper-
ature alarm set point, low temperature alarm set point, and
(optional) BUS set point. Default settings are shown in the table
below.
a. Setting the Operating Temperature
All 900 Series freezers have an operating temperature
range of -50°C to -86°C, depending on ambient temperature.
The freezer is shipped from the factory with a temperature set
point of -80°C. To change the operating temperature set point:
1. Press the Mode key until the Set Temperature indicator
lights.
2. Press the up/down arrow key until the desired tempera-
ture set point is displayed.
3. Press Enter to save the set point.
4. Press the Mode key until the Run indicator lights for
Run mode
If no keys are pressed, the freezer will automatically
return to RUN mode after 5 minutes.
Model 900 Series ___________________________________________________________________Installation and Start-Up
1 - 4
Figure 1-9
If the set point is changed and the low temperature and high
temperature alarms are set 10° from the set point, the alarm
set points will be adjusted automatically to maintain a dis-
tance of at least 10° from set point.
Control Set Point -80°C
High Temperature Alarm -70°C
Low temperature alarm -90°C
Optional BUS Set Point -60°C
Figure 1-8
Assure the battery switch is turned on. The
rechargeable batteries require 36 hours to charge
at initial start-up. A “Low Battery” alarm may
occur until the batteries are fully charged. Should
a power failure occur during the initial start-up
period, the electronics will have limited operation.