User manual

1 Press OK to accept the change.
2 Press ESC to skip the change.
1 The difference between 0 and 100% must be at least
0.1 mS/cm.
2 Increase the span between zero and full scale setting. See
section 3.8.
1 Check that the conductivity cell is connected.
2 Recalibrate temperature.
3 If problem remains, replace the conductivity cell.
1 Check the pH electrode connection.
2 Clean the pH electrode.
3 If problem remains, change the pH electrode.
1 Factory calibration for pH is lost. The monitor can still be
used but may not meet specifications for pH measurement.
2 Call for service.
1 Factory calibration for conductivity is lost. The monitor can
still be used but may not meet specifications for conductivity
measurement.
2 Call for service.
1 Önly visible to service personnel.
1 Electrode slope is out of range. Check buffers and
recalibrate.
2 Clean the pH electrode and recalibrate.
3 If the message remains, replace the pH electrode.
1 The difference between the pH of the buffers used during
calibration must be at least 1 pH unit.
1 Check that the conductivity cell is connected. Recalibrate.
2 The measured temperature value differs from the reference
value by more than ±5 °C, or actual temperature is lower
than -8 °C. Recalibrate.
3 If the message remains, replace the conductivity cell.
1 The difference between the zero level and full scale must be
at least 1 pH unit. Increase the span between zero and full
scale settings. See section 3.8.
97 WARNING pH scale
(0-100%)<1pH unit
95 Temp cal failed
check cond cell
94 WARNING<1pH unit
between cal_buff 1&2
93 pH_cal failed
check electrode
92 WARNING electrode
slope <70 or >110%
91 WARNING
bad pH ad value
90 ATTENTION
set<=0mV first
89 Electrical error
Call for service
88 Electrical error
Call for service
87 WARNING pH-probe
bad/not connected
86 WARNING cond_cell
bad/not connected
85 WARNING condscale
(0-100%)<0.1mS
84 WARNING cond_cal
will be changed
83 WARNING temp_cal
will be changed
Monitor UPC-900
User Manual 18-1125-55 Edition AE
32
5 Trouble-shooting