Agilent 5110/5100 ICP-OES Service Manual Agilent Restricted 177
6 Customer Diagnostics and Problem Solving
Optics Gauges
Optics Gauges
Polychromator (°C)
Polychromator Temperature gauge measures the temperature of the Polychromator Optics.
The Optics is heated to maintain a constant temperature of 35°C but can take a number of
hours to stabilize to this temperature if the instrument has only just been switched on.
Otherwise if the temperature is outside this specification it could indicate there is an instrument
fault with the heating system.
Polychromator Purge
Polychromator Purge gauge measures Gas purge flow to the Optics system. The gas purge
(Argon or Nitrogen) is required to keep the optics clean and free of contaminants as well as
allowing analysis of elements in the low UV region. The purge flow normal flow rate is 0.7L/Min
but a Boost purge is available when selected to increase flow to 3.7L/Min. If the flow is outside
specification this could indicate a problem with Inlet Gas Pressure or an instrument fault with
the Gas Control System.
Peltier (°C) Camera
The Peltier Camera Temperature gauge measures the Temperature of the Camera (detector)
mounted inside the Polychromator Optics. The Camera’s normal operating temperature is -40°C
and is run at this temperature to reduce electronic noise for better detection limits. If the
temperature is not within specification it could be that the Cooling water is switched off
(Temperature will either hover at ~Lab Temperature or Polychromator temperature or
somewhere in between.) Otherwise if temperature is out of specification it could indicate an
instrument fault with camera or camera drive circuit.
Thermal Stabilizer (°C)
The Thermal Stabilizer Temperature gauge measures the temperature of the thermal stabilizer
that is mounted between the Polychromator Optics and the Pre optics. The purpose of the
thermal stabilizer is to keep the Polchromator optics temperature stable, that is, prevent heat
from the Plasma causing the temperature of the Polychromator optics to rise and conversely
when the plasma is off prevent heat from sinking into Pre optics causing a fall in temperature.
The Thermal Stabilizer Temperature should maintain 35°C. If the Temperature is outside this
range, it could indicate the instrument had been switched off and needs time to stabilize (Check
Polychromator Temperature) or there is an instrument fault with the thermal stabilizer control.
Camera Water Flow
The Camera Water Flow Gauge measures water Cooling flow through the camera channel. If
the water flow is outside specification it could indicate a problem with incoming water chiller set
pressure or a blockage in the water pipes or a dirty instrument water filter (right hand side of
instrument).
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