Alarm Tones and Displays:
A.
Tone Pattern:
Display Pattern:
B.
Tone Pattern:
Display Pattern:
C.
Tone Pattern:
Display Pattern:
Ground Leakage:
D.
Tone Pattern:
Display Pattern:
E.
Tone Pattern:
Display Pattern:
F.
Tone Pattern:
Display Pattern:
n o L
o
A
D
o
o
o
GOES BLANK
LAST VALUE
. . .
. . .
FLASHING
FLASHING
FLASHING
FLASHING
FLASHING
LAST VALUE
. . . .
FLASHING
Ground
Leak
TROUBLESHOOTING GUIDE
Unit Alarms:
This power supply is equipped with both audible and visual
alarms. Items A through F listed immediately below are graphical representa-
tions of each alarm mode. To understand which alarm has been activated and
why, match the letter (A - F) to the corresponding text below.
A. Open Connection:
A continuous tone which is generated as soon as
the D.C. Output On key is depressed. The displays will spell n o L o A D .
Depressing D.C. Output Off key will cancel the alarm mode. (For cause
see, “Unit will not start”.)
B. Timer At Zero:
Nine short bursts in groups of three followed by the
D.C. Off light illuminating. The three output displays will indicate zero.
This indicates that the set time interval has expired.
11
higher degree of caution. Chamber manufacturers normally rate their product for
maximum voltage and/or maximum wattage. Whenever possible, contact the
manufacturer and request this information. It is the safest method of determining if a
chamber is suitable for a particular procedure.
Whether you use special purpose or multipurpose chambers, the maximum operat-
ing temperature the chambers will withstand is a critical aspect of safe operation.
Most electrophoretic chambers (with a few notable exceptions) are made of acrylic
plastic and must operate well below a temperature of 55 °C. If there is a lack of
information about the capabilities of the chamber being used, regular monitoring of
the operating temperature is recommended. This should be done without coming
into physical contact with the chamber when voltage is applied. Use the procedure
listed below to select operating parameters.
PROCEDURE:
(See fold out on last page)
1.
The electrophoresis chamber
should first be set up, then
filled with buffer and sample,
before plugging the cham-
ber’s leads into the appropri-
ate positive and negative
4 mm sockets (14) on the
power supply.
2.
Switch on the power supply
using the Power On/Off
switch (22). Once on, the
Green D.C. Output Off light
(21) and Yellow Actual
Display light (17) will be illumi-
nated. The Volts display (3),
Milliamps display (5) and
Watts display (7) will all indi-
cate zero. The Time display
(10) will indicate zero as well.
On
Off
14
22, 21,
17, 3,
5, 7, 10
DC Output
NOTE:
An alternative procedure favored by some users is as follows:
Sample is withheld from the chamber until the power supply has been properly
adjusted and successfully started. Once the user has confirmed that the chamber and
power supply are both functional the power supply is turned off and sample is
loaded. The power supply will remember its settings, so it can be turned on and start-
ed without further adjustment.
Set
Actual
Display
6
THERMO EC HIGH VOLTAGE POWER SUPPLIES
THERMO EC HIGH VOLTAGE POWER SUPPLIES
