Thermo Electron 8600 Series, Руководство по эксплуатации и техническому обслуживанию

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e. Remote Alarm Contacts and Analog Output
The 8600 series freezer has remote alarm contacts and ana-
log output. The remote alarm provides a NO (normally open)
output, a NC (normally closed) output and COM (common).
The contacts will trip on a power outage, high temperature
alarm or low temperature alarm. Figure 1-8 shows the remote
contacts in alarm state.
The analog output function allows the freezer to output sig-
nals representing the temperature of the freezer cabinet. The
factory default setting is 4-20 mA. Refer to figure 1-9 for out-
put specifica-
tions.
f. 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.
g. 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 message may appear in the message center.
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. See Chart 1-1 for more detail.
a. Setting the Operating Temperature
All 8600 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 Settings indicator lights.
8600 Series _______________________________________________________________________Installation and Start-Up
Figure 1-10
1 - 5
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
4-20 mA 0-1V 0-5V
Temperature -100 to +50°C -100 to +50°C -100 to +50°C
Figure 1-9
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.
Figure 1-8