Marconi LORAIN RHM800E50 Manual page 20

Close the meter and control panels, then
start the rectifier by placing the POWER
switch to the ON position.
5.6 The high voltage alan adjustment potentiometer
sets the value at which light emitting diode HIGH VOLT-
AGE ALARM illuminates and an external alarm is acti-
vated, if connected. Unless otherwise specified, the
high vottage alam, is factory adfsted for 57.6 VDC. To
readjust this limit, observe the following procedure:
Turn off the rectiiier by operating the
POWER switch to the OFF position.
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Open the meter and contml panels by loos.
ening the captive fastenets. Disconnect the
rectifier from battery by removing the SAT-
TERY DISCONNECT link.
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step cl. Easlwdous DC sortage is
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Connect an adjustable DC supply capable of
supplying 60 volts DC to
terminal (+) and either terminal of fuse Fl
Adjust potentiometer R39 fuliy clockwise.
Refer to Figure 5-l for location.
Turn on the external DC supply and adjust
output voltage to the desired high voltage
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I
I
ment to the desired
Slowly adjust potentiometer R39 counter-
clockwise until light emkting diode HIGH
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VOLTAGE ALARM on the front panel illumi-
nates.
As a check, decrease the output voltage of
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the external DC supply; light emktttg diode
HIGH VOLTAGE ALARM should extinguish.
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DANGER
high uoltage alarm ualue.
Slowly increase the vottage until light emit-
ting diode HIGH VOLTAGE ALARM illumi-
nates. Repeat Steps f) and g). if necessary,
until the atam, is activated at the proper vok-
age.
Adjust power suppN output voltage to
exactly the same value of battery voltage at
the rectifier output terminals. These volt-
ages should be measured with a digital mul-
timeter.
With power supply output voltage property
adjusted, inset-l the BATTERY DISCON-
NECT link.
disconnect the test leads.
Close the meter and control panels, then
start the rectifier by placing the POWER
5.7 The low current alarm adjustment potentiometer
sets the value at which light emtttfmg diode LOW CUR-
RENT ALARM illuminates and an external low current
alarm is activated, if connected.
specified, the low current alarm adjusbnent is factory
set to provide an atann when rectiiiar output decreases
below 0.5% of rated cunent. To readjust the low current
alarm, observe the following procedure:
This procedure is
shock am p-t
fatal ehxtrical
t h e n?ct!fier i s opemting. Exercise c a u t i o n
that
terminations does Iwt occur.
Turn off the recteier by operating the
POWER switch to the OFF position. Open
the meter and control panels.
If remote sensing is used in the rectifier, dis-
connect and temporarily insulate the remote
sensing leads. These leads are connected
at TS3 terminals 1 and 2.
Section 4387
Unless otherwise
with
performed
when
with any electrical
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