14
LaMotte TRACER pH PockeTester
TM
1741 Instruction
Problem
Cause
Action
Erratic LCD
display
Samples have low ionic
strength (lack salt); e.g.
distilled, deionized,
boiled, lake water (high
pressure)
For each 50 mL of sample add
1 drop (50 mL) of saturated
Potassium Chloride (KCl). No
alteration in pH will occur by
inert KCl.
Unexpected
readings
Buffers
Calibrate with fresh buffers
Buffers
Calibrate with buffers that bracket
sample pH
Display frozen
HOLD function
Press MODE or turn meter off
Button response
Remove batteries press ON/OFF
button for 3 seconds. Reinsert
batteries (stored data will be lost)
Steady “-1 ”
display
Wait
Reading not stable yet
If the meter will not calibrate or displays a -1, reset the meter and attempt to re-
calibrate.
1. Turn off the meter.
2. Remove the battery cartridge from the top of the meter.
3. Press the ON/OFF button for 10 seconds to bleed off all charges within the
meter.
4. Re-insert the batteries and turn the meter on.
5. Follow the pH Calibration procedure.
•
If the unit appears to be locked (display frozen) it is possible that the Data
Hold mode has been inadvertently accessed by pressing the MODE button.
Press the MODE button again or turn the meter off and restart if the display
appears frozen.
•
If the meter does freeze and no button presses revive it, remove the batteries,
press the ON button for 10 seconds and then reinsert the batteries.
•
If the batteries are removed, any stored readings will be discarded and the
user calibration data for pH will be cleared. New user pH calibration data is
required. However, factory calibration data will be retained.
EXPAND YOUR TRACER
Interchangeable electrodes are available to convert the pH TRACER to a Total
Chlorine TRACER or an ORP TRACER.
Remember to ask for instructions and appropriate reagents or buffer tablets when
ordering the Total Chlorine or ORP electrodes.
