7
TROUBLESHOOTING
MAIN
DISPLAY
POSSIBLE CAUSE
CORRECTIVE ACTION
Er 1
pH electrode offset is greater/less
than +/-1.5 pH.
STAND was pressed before the
electrode and ATC/Temp probe settle
to within ±1.5 pH of the buffer value.
pH electrode is faulty
Replace the buffer and/or
the pH electrode. Press ESC.
Allow sufficient time for the
electrode and ATC/Temp
probe to stabilize.
Return for service.
Er 2
pH electrode slope is off by more
than 30% of ideal slope.
SLOPE was pressed before the
electrode and ATC/Temp probe
settled to within 30% of the buffer
value.
Buffer 4.00, 4.01, 9.18 or 10.01 is not
correct.
Check that the correct buffer
is used and that the
electrode slope is not off by
more than 30% from the
theoretical slope.
Allow sufficient time for the
electrode and ATC/Temp
probe to stabilize.
Replace the buffer and/or
the pH electrode. Press ESC.
Return for service.
Er 3
Temperature is out of the 0.0 to 60.0
°C range.
Bring the buffer temperature
within range.
Return for service.
OvEr/Undr
Measured pH is out of the 16.00/-2.00
pH range.
Measured mV is out of the 1250/-
2000 mV range.
Measured temperature is out of the
-10/120 °C range.
Bring the out of range unit
into the correct measuring
range.
If units are within proper
range, return product for
service.
SPECIFICATIONS
Display
Range
Accuracy
Resolution
pH
-2.00 to 16.00 pH
±0.1%, ±2 lsd
0.01 pH
mV
-1999 to 1999 mV
±0.1%, ±1 lsd
1 mV
Temperature °C
-10.0 to 120 °C
±0.5 °C
0.1 °C
pH Temp Compensation
AUTO/MANual -10.0 to 120.0
°C
pH Buffer Recognition
(4.01, 7.00 & 10.01) or (4.00, 6.86 & 9.18)
pH Buffer Calibration Temp. Range
0 to 60
°C
pH Electrode Offset Recognition
±90mV at pH 7.00 or 6.86
pH Electrode Slope Recognition
±30% at pH 4.00, 4.01, 9.18 or 10.01
Power
One 9V battery/ Approximately 1000 hours
Instrument Casing
Waterproof IP 67
Calibration Back-up
Yes
Audio Feedback
Yes, on all touch keys
Autolock Feature
Yes
Operating Temp. Range
0 to 50
°C
Operating Relative Humidity Range
up to 95%
ATC Probe
Thermistor, 10k
/ 25
°C
Dimensions (L x W x D)
18.7 cm x 7.6 cm x 3.8 cm (7.37 in x 3 in x 1.5 in)
Weight (batteries included)
270 grams (.6 lb)
