8-12
Troubleshooting
8.4.10 Needle Heater
Table 8-10 Needle Heater Troubleshooting
Symptom
Possible Cause
Recovery
Set Point (SP) value below Present
Value (PV) or the heater is in an
idle state
Change the SP value within the Heater Controls
Window. See
Disconnected heater
Verify the needle heater cable connections are
securely attached to the correct ports.
Failed DHC power
Verify DHC indicator lights for 3.3V, -12V, and
12V are illuminated.
No needle heat
Failed heater
Verify the needle heater electrical parameters.
The resistance between pins 4 and 5 for the
heating element should be 100 ohms +/- 5 ohms.
The resistance of the RTD sensor between pins
6 and 7 should be 108 ohms, +/- 5 ohms.
8.4.11 Tactile Sensor
Table 8-11 Tactile Sensor Troubleshooting
Symptom
Possible Cause
Recovery
During setup routine,
error indicates that the
tactile sensor is already
engaged
Tactile sensor cap is stuck in the
down position
Visually inspect the sensor cap for fluid buildup.
If there is fluid, clean as specified in
service technician.
The tactile sensor signal can be tested from the
Fluidmove
Tools > IO
menu. Select IO and
inputs. Locate the tactile cap signal display and
monitor its state as the cap is depressed and
released. If the state does not change, the
precision switch may have failed.
Needle-to-height-sensor
offset is inaccurate
Fluid build-up on probe tip or tactile
sensor cap may have caused
inaccurate height sensor calibration
1. Clean probe tip/tactile sensor cap. See
2. Perform a “Valve Offsets” routine in FmXP.
For assistance, refer to the
Fluidmove User
Guide
or Online Help.
Содержание Asymtek Spectrum S-920
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Страница 185: ...Troubleshooting 8 11 Figure 8 3 FmXP Scale Setup Menu Figure 8 4 Scale Error Message...
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