YSI pH100A - Manual (Page 9)

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)