Cleaning Recommendations - Extech Instruments Exstik Ec500 Bedienungsanleitung

Cleaning Recommendations

When cleaning the probe, take care not to scratch or damage the sensing surface or the
platinized electrode surfaces.
Contaminant
Cleanin Solution
Water soluble substances Deionized water
Grease & Oil
Warm water and household
detergent
Heavy grease & Oil Alcohol
Lime and hydroxide
10% acetic acid
coatings
Please Note: Since the EC500 does not have a refillable reference electrolyte chamber, it is
important not to soak the electrode in the above solutions for more than the recommended
times. To do so may cause a reference potential shift, which will cause degradation in
pefformance or failure.
12
Instructions
Soak or scrub with a soft
brush. Recondition in 4 or 7
buffer for I hour.
Soak or scrub with a soft
brush, maximum of 10
minutes. Rinse thoroughly
with Dl water, recondition in
4 or 7 buffer for 1 hour.
Maximum of 5 minute soak,
scrub with a soft brush.
Rinse thoroughly with Dl
water, recondition in 4 or 7
buffer for 1 hour.
Soak until coating dissolved,
maximum of 5 minutes.
Rinse thoroughly with DI
water. recondition in 4 or 7
buffer for I hour.
EC500-EU v2.o 5/05
Troubleshooting
Possible Cause
Problem
Readingis frozen
unit is in "HOLD" mode
Batteries are low
"BAT" messa e
Low pH stope
Unit will not calibrate in pH
Unit will not calibrate in pH Clogged or contaminated
reference •unction
Unit will not calibrate in pH Damaged or worn out
sensin membrane
Contaminated
Unit will not calibrate in H
Unit will not calibrate in Contaminated conductivity
conductivity mode
standards
Unit will not calibrate in Dirty probe
conductivi mode
IJnit will not calibrate in Damaged conductivity probe
conductivi mode
Trapped air bubbles
Unit will not calibrate in
conductivi mode
Unit wit( not turn on Battéries are tow or dead
Batteries installed
Unit will not turn on
incorrect Olari
"RENEW" message pH sensor needs
recalibration
"RENEW" message pH sensor slope has fallen
below acce table limits
Unit will not respond to any Internal fault
key presses
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Action
Press MODE/HOLD key to
exit "HOLD" mode
Re lace batteries
Replace electrode, see
reorder information
Clean junction (see
cleanin instructions
Replace electrode. see
reorder information
Use fresh buffers
H buffers
use fresh standards
Clean conductivity probe
See cleanin instructions
Replace electrode, see
reorder information
Tap or stir to release air
bubbles
Re lace batteries
with Replace batteries,
observe Olari
Recalibrate unit
use fresh buffers
Replace electrode, see
reorder information
Perform hard reboot:
Remove batteries, hold
ONIOFF switch down for 5
seconds, re lace batteries
Corporation.
in whole or in part in any form.
13 EC500-EU V2.o 5/05