Thermo Scientific Orion Star A113 Instruction Sheet

Display Information

Display Icon Description
MEAS Indicates that the meter is in the measurement mode.
SETUP Indicates that the meter is in setup mode.
CAL Indicates that the meter is the calibration mode.
MAN Shown when a manual calibration (Winkler titration) is being done.
AUTO Shown during water-saturated air calibration. Default setting.
Shows the battery status (more bars = more power remaining).
Blinks when power is low and the battery needs to be changed.
(Batteries included and factory-installed with the portable meter Orion Star A123 DO meter.)
Shown when the meter is running on AC power.
(Adapter included with the benchtop meter Orion Star A113 DO meter.)
Shown when the meter is on AUTO-READ mode. Default setting. AR and unit of measurements
will blink until the reading is stable. When the reading is stable it is held on the screen and AR is
lit. Press to take a new reading.
Unit of measurement will blink until the reading is stable.
READY
When the reading is stable, READY is lit.
Appears during and after a calibration has been performed.
Displayed when a reading is stored into the memory.
Displayed when viewing stored readings.
Secondary display Shows temperature reading in measurement mode and setup menu in setup mode.
Primary display Measured value in selected mode.
Instructions Located below the primary display. These phrases aid in the setup menu and calibration modes.
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Thermo Scientific Orion Star A113
English
Benchtop & Star A123 Portable DO Meters
DO
Instruction Sheet

Preparation

1. Power source:
a. Power adapter (included with Orion Star A113 benchtop DO meters,
sold separately for Orion Star A123 portable DO meters) – Select the
appropriate wall socket plug. Slide off the clear plastic cover, and slide
on the plug plate into the groove on the back of the adapter.
b. Batteries (factory installed on Orion Star A123 portable DO meters,
sold separately for Orion Star A113 benchtop DO meters) – Select
four AA batteries. Confirm that the meter is off and remove the
battery compartment cover. Insert batteries as shown in the battery
compartment housing.
2. Prepare the DO probe according to the probe instructions. In general:
a. Unscrew the membrane cap from the DO probe, fill the membrane
cap about ¾ full with polarographic electrolyte solution and screw the
membrane cap onto the DO probe.
b. Connect the DO probe to the meter and allow the probe to polarize for
about 30 to 60 minutes.
A DO reading of zero and no change in temperature indicates that the
DO probe is not fully connected to the meter. Disconnect the DO probe and then
firmly reconnect the DO probe to the meter.
3. Prepare the calibration sleeve or BOD bottle.
a. For the calibration sleeve, remove the cap from the sleeve and remove the
sponge from the cap. Wet the sponge with distilled water and squeeze out
excess water. Reassemble the calibration sleeve and insert the DO probe.
b. For a BOD bottle, fill the bottle with about 50 mL of distilled water. Insert
the DO probe into the BOD bottle. Use a Thermo Scientific Orion BOD bottle
adapter if the DO probe does not fit directly into the bottle. Make sure that
the probe is suspended about half an inch above the distilled water and
there is no water on the surface of the DO probe membrane.
4. Connect the appropriate item as labeled on the meter and as shown in Figure 1.

Overview

1. To turn on or off the meter, press .
2. To exit any meter function, press to return to the measurement mode.
3. The meter mode is shown at the top of the meter:
MEAS – for measurement mode
SETUP – for setup mode
CAL – for calibration mode
4. The meter can be calibrated using water-saturated air or using the Winkler titration
method for a manual calibration.
5. Press to switch between reading in % saturation, mg/L, solution
temperature or membrane temperature. ("m" will appear in front of the
membrane temperature reading.)
ation
Figure 1