Chapter 2 Meter Overview; Connections - Thermo Scientific Orion Star A111 Reference Manual

Chapter 2 Meter Overview

Connections

1. Power source:
a. Power adapter (included with Orion Star A111 benchtop pH meters, sold separately for Star A121
b. Batteries (included with and factory installed on Star A121 portable meters, sold separately for Star
Push down on tab and lift the
battery cover
Figure 1
Thermo Scientific Orion Star A111 Benchtop and Star A121 Portable pH Meters
portable pH 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.
A111 benchtop meters) – Select four AA batteries. Confirm that the meter is off and remove the battery
compartment cover.
To remove the battery compartment cover:
i. Loosen the screws.
ii. Release the top portion of the battery compartment from the meter (using a coin
or your finger.)
iii. Release the bottom portion of the battery compartment (using a coin
or your finger).
Insert batteries as shown in the battery compartment housing.
Orion Star A111 Benchtop
Orion Star A121 Portable
Remove screws
2. Prepare the pH electrode according to
the electrode instructions.
3. Connect the appropriate items as
labeled on the meter and as shown in
figure 1.
3