Jenway 4510 User Manual
Page 22
Section 7
Troubleshooting
7.1Troubleshooting
Fault
Possible Cause
Action
No display
Check power supply
Check that correct 9V ac power supply
is connected and switched on.
Erratic display
Check power supply
Unit must be used with supplied 9V
acpower supply. Usage of other units will
cause the 4510 not to operate.
Unstable display
Conductivity cell defective
Replace conductivity cell.
Display permanently
Intermittent or no connection
Check cell connection to 4510.
under or over range
Conductivity cell defective
Replace conductivity cell
Contaminated solutions
Replace solutions
Intermittent display
Conductivity cell not fitted
Check connections.
correctly
Reading drifts
Conductivity cell stored dry
Allow to soak for 2 hours
CO
2
absorbtion by sample
Noticeable for low conductivity - do not
allow sample to stand in unstoppered
bottles.
Non linear readings
Conductivity cell not zeroed
Zero conductivity cell.
Poor reproducibility
Carryover between solutions
Rinse cell in distilled water between
measurements.
Will not print
Connection
4510 requires the RS232 cable to
connect the printer.
Paper out
The feed light on the printer will flash if
the unit requires paper.
Battery flat
Connect ac power supply.
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451 050/REV A/03-03