Thermo Fisher Scientific CyberScan pH 1000/pH 2500 - Manual (Page 33)

Instruction Manual pH 1000/ 2500
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13 TROUBLESHOOTING AND ERROR MESSAGES
TROUBLESHOOTING
PROBLEM 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
Err 1(On primary
display) + 2 short
beeps. Memory write error. Unit is too old (> 10 years). Turn meter off and then on.
Return if necessary.
Err 2 (On primary
display) + 2 short
beeps. Memory checksum
error. Hardware failure. Turn meter off and then on.
Return if necessary.
Err 3 (On primary
display) + 2 short
beeps. ADC error. Hardware fault. Turn meter off and then on.
Return if necessary.
Err 4 (On primary
display) + 2 short
beeps. Keypad error. One or more keypads are
stuck. Turn meter off and then on.
Return if necessary.
Err 5 (On primary
display) + 2 short
beeps. Real time clock
failure. Unit is too old (> 10 years). Turn meter off and then on.
Return if necessary.
No display + 2 short
beeps. ADC error. Hardware fault. Turn meter off and then on.
Return if necessary.
Err annunciator + 2
short beeps. Wrong keypad. Wrong key pressed. Release key and select correct
key.