Thermo Fisher Scientific CyberScan pH 1100/pH 2100 - Manual (Page 59)

Instruction Manual pH 1100/ 2100
59
15 TROUBLESHOOTING & ERROR MESSAGES
TROUBLESHOOTING
Problem Possible Cause Solution
Power ON but no display AC adapter not connected properly Connect AC adapter properly
Unstable Reading Electrode submersion in sample is
insufficient Place electrode deeper into sample
Broken electrode Replace electrode
External noise causing instability in
reading. Remove or switch off interfering motor
Dirty electrode Clean Electrode. Reactivate if necessary
Slow response Dirty electrode Clean Electrode. Reactivate if necessary
ERROR MESSAGES
LCD Display Indicates Cause Solution
Error:
EEPROM Read Error Memory write error Unit is too old (> 10 years) Turn meter off and return to authorized
distributor if necessary
Error:
EEPROM write Error Memory checksum
error Hardware failure Turn meter off and return to authorized
distributor if necessary
Error:
DTR is set too high DTR line is
disconnected Hardware fault Turn meter off and return to authorized
distributor if necessary
Error:
Communication error Frame/parity errors Turn meter off and return to authorized
distributor if necessary
Error:
Buffer Overflow Received buffer
overflowing Turn meter off and return to authorized
distributor if necessary
Error:
pH Offset Error pH offset too much pH offset should not exceed
±1 pH from the display Check electrode condition
Make sure buffer is fresh and correct
Recalibrate meter
Error:
pH Slope Error Incorrect pH slope pH slope is out of allowable
limit Check electrode condition
Make sure buffer is fresh and correct
Recalibrate meter
Error:
Ion Slope Error
(pH 2100 meter only)
Incorrect ion slope Average ion slope is not
within 10mV-75mV/decade Check electrode condition
Make sure buffer is fresh and correct
Recalibrate meter
Error:
mV Offset too large Offset too much Value input is not within
±150.0mV from the display Recalibrate meter
Error:
Out of Range Out of Range Value input exceeds the
specified range Re-enter value
Error:
ATC offset too much Offset of temp. probe
too much Temp. calibration offset is
not within ±5
o C (or ±9 o F)
Re-enter value
Error:
Too much offset@7pH Offset too much pH offset should not exceed
±1 pH from the display
(custom pH buffer) Re-enter value
Error:
Slope out:75%-105% Incorrect pH slope pH slope is not within 75% to
105% (custom pH buffer) Re-enter value
Error: Pts too close
Or slope diff. sign Incorrect slope
alignment Slope is not negative or cal.
Points are not ±1 pH apart
(custom pH buffer) Re-enter value