YSI Pro1020 - Manual (Page 23)

38 39
Symptom Possible Solution
DO readings are
inaccurate. 1. Verify correct DO sensor/membrane type
selection in the System Setup menu.
2. Verify user-defined Salinity correction value.
Salinity is used in the calculation of mg/L.
3. Verify temperature readings are accurate.
4. Sample temperature should be
between 0 and 45 ºC, the temperature
compensation range for DO mg/L.
5. DO sensor not properly calibrated,
recalibrate the sensor.
6. Replace membrane and
electrolyte. Recalibrate.
7. Clean sensor electrodes. Install
new membrane. Recalibrate
8. Contact YSI Tech Support.
Dissolved Oxygen
values display Over or
Undr on Run screen. 1. Verify correct DO sensor/membrane type
selection in the System Setup menu.
2. If using a polarographic sensor,
allow instrument to warm up for
5 – 15 minutes before use.
3. Sample dissolved oxygen concentration
is more than 50 mg/L or 500%, or
less than –0.02 mg/L or -0.3%.
4. Verify user-defined Salinity correction value.
5. Verify temperature readings are accurate.
6. Replace membrane and
electrolyte. Recalibrate.
7. Clean sensor electrodes. Replace
membrane. Recalibrate.
8. Contact YSI Tech Support.
S P E C I F I C A T I O N S
These specifications represent typical performance and are subject to
change without notice. For the latest product specification information,
please visit YSI’s website at ysi.com or contact YSI Tech Support.
Parameter Range Resolution Accuracy
Temperature -5 to 55°C* 0.1°C ± 0.2°C
pH 0 to 14
pH units 0.01 Instrument with cable
and sensor: +/- 0.2
ORP -1500 to
1500 mV 1 mV Instrument with cable
and sensor: +/-20 mV
Dissolved
Oxygen
0 to 200% air
saturation 1% or 0.1%, user
selectable ± 2% of the reading
or ± 2% air saturation,
whichever is greater
200 to 500%
air saturation 1% or 0.1%, user
selectable ± 6% of the reading
0 to 20 mg/L 0.1 or 0.01 mg/L,
user selectable ±2% of the reading
or ± 0.2 mg/L,
whichever is greater
20 to 50
mg/L 0.1 or 0.01 mg/L,
user selectable ±6% of the reading
Barometer 500 to 800
mmHg** 0.1 mmHg ±5 mmHg within
15°C of calibration
temperature
* Automatic dissolved oxygen temperature compensation range is -0
to 45 ºC
**Available barometer units include: mmHg, inHg, mbars, psi, or KPa
A C C E S S O R I E S / P A R T N U M B E R S
Part Number Description
6051020 Pro1020 Instrument
6261020-1, -4,
-10, -20, or -30 1, 4, 10, 20, 30-meter cable assembly*
(3.2, 13, 32.8, 65.6, 98.4-feet)
605101 pH Sensor
605216 Amplified pH Sensor kit. Includes sensor and
guard extender. Guard extender required on
first amplified sensor purchase only.
605323 Amplified pH Sensor
605102 ORP Sensor