Explanation Of Auxiliary Panel - Thermo Scientific 815 Operating And Maintenance Manual

Refrigerated incubator - microprocessor controlled
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Section 1
Installation and Start-Up
Explanation of Front
Panel Controls (cont.)
Explanation of Auxiliary
1-4
Refrigerated Incubator
Set Temp/Cal Key - This key is used to view the operating setpoint tem-
perature or calibrate the unit to a certified/traceable thermometer. The
first depression of the key selects the operating setpoint and the second
depression selects the calibration mode. The respective green indicator
lamp will light.
Enter Key - This key is used after any setpoint selection is made to enter
the value into memory.
Up/Down Arrow keys - These keys are used to increase or decrease the
desired setpoint value.
On the left side of the incubator control panel, there is an auxiliary panel
which has the items shown in the illustration below. They are described as
Panel
follows:
1) Fuse - This fuse is in line with the main power cord that comes into the
incubator. The rating of this fuse is printed above the fuse holder. The
physical size of this fuse is 5mm x 20mm.
2) Alarm Relay - This Alarm Relay output is provided to the user for the
purpose of remotely monitoring the incubator in case of a high or low
temperature alarm condition. This alarm relay will operate just as the
audible alarm would. The contact itself is an isolated form C (normally
open/normally closed) dry contact. This contact is to be used for low
voltage class 2 connections only. The contact rating is 24 volts, 1.25
amps resistive. Typical usages of the output are shown below.
In the above configuration, the light will illuminate whenever the unit goes
into an alarm condition...High or Low.
In the configuration below, the light will go off in a high or low
temperature alarm condition.
Warning Wiring must conform to all local electrical codes.
s
Thermo Scientific

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