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Thermo Scientific Orion VERSA STAR pH/ISE/Temperature Module
Chapter 2 Module Overview
To connect the modules to the meter and for specific information regarding the meter outputs, please see the
Orion VERSA STAR Reference Guide. The Reference Guide is on the CD included with the meter and also available
at www.thermoscientific.com/water.
Module Connections and Inputs
The Orion VERSA STAR meter can accept Orion combination ISE electrodes as well as separate reference and sensing
half-cell electrodes. This allows for a wider ISE measurement offering. Half-cell electrodes separate the ions sensing
from the reference electrode. For difficult samples, the flexibility of using alternate fill solutions may be an advantage
to researchers.
1. Prepare the pH or ISE electrode and ATC probe for use as instructed in the electrode user guides.
The pin tip reference connector is on the lowest panel of the pH/ISE module.
2. Place the pH or ISE, ATC probe and Orion Star stirrer probe (cat. no. 096019, optional) into the
electrode arm.
3. Attach the pH or ISE BNC and ATC probe to the pH/ISE meter module. Lower ISE and ATC into
solution for conditioning if required. If using the stirrer probe, attach probe to the meter, place into the
electrode arm and assign the probe to the channel in the setup menu for instrument settings.
4. Prepare fresh standards daily for calibration. For ISE testing, standards should be at least one decade
(10 times) apart. The standards should exceed the expected minimum and maximum sample range.
Serial dilution is recommended using calibrated pipettes to accurately prepare calibration standards
from a stock solution.
5. Gather reagents, rinse water, and other supplies.
For ISE testing, if ISA will be added to the sample, it needs to be added to all the standards prior to
calibration to ensure a consistent dilution factor.
pH/ISE Module
8 pin mini-DIN for ATC
BNC connection with shorting cap
Reference pin socket
