Agilent 5110/5100 ICP-OES Service Manual Agilent Restricted 37
3 General Information
Mains Power Module (MPM) Self Check
If there is high current detected (over 200mA), it will stay in a reset loop. This means the triacs
are faulty, can’t proceed with testing.
If the fault is downstream (outside) the MPM, disconnecting the fan or blower will enable the
MPM to get past this step. If the fault is inside the MPM it will stay in the rest loop.
RF Power Supply Relay
In this step of the MPM start-up sequence, the RF power supply relay is simply enabled. No
system measurements are performed during this step of the MPM start-up sequence and the
sequence progresses after a dwell time of 500 ms.
Because the P500 controls the power to the top of the interlock chain, and all interlocks need to
be closed for the power to reach the relay, this relay will never actually be turned on during the
MPM power up sequence. You will never hear this relay click during an MPM power up
sequence. This is legacy code that has not been removed.
Heater
In this step of the MPM start-up sequence, the MPM enables the polychromator heater pads at
maximum drive (100%) and monitors instrument current measurements to detect heater short
or open circuits.
If the instrument current measurement is less than 100 mA after enabling the polychromator
heater pads at maximum drive, an open circuit (missing or disconnected or faulty
polychromator heater pads or triac is faulty) is assumed.
Open circuit condition is to be logged but will not stop power up check sequence from
continuing.
If the instrument current measurement is greater than 1000 mA after enabling the
polychromator heater pads at maximum drive, a short circuit is assumed.
If a short circuit is detected, the MPM start-up sequence is reset. If no error is detected or
assumed after a dwell time of 500 ms in this start-up step, the MPM start-up sequence is
continued.
Blower
In this step of the MPM start-up sequence, the MPM enables the mains blower at maximum
drive (100%) and monitors instrument current measurements to detect blower short or open
circuit.
If the instrument current measurement is less than 100 mA after enabling the mains blower at
maximum drive, an open circuit (missing or disconnected or fault blower fan or triac) is
assumed.
Open circuit condition is to be logged but will not stop power up check sequence from
continuing.
If the instrument current measurement is greater than 1000 mA after enabling the mains blower
at maximum drive, a short circuit is assumed.
If a short circuit is detected, the MPM start-up sequence is reset. If no error is detected or
assumed after a dwell time of 500 ms in this start-up step, the MPM start-up sequence is
continued.
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