Jenway 4510 - 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.
19 451 050/REV A/03-03