Thermo Scientific Orion 720Aplus Quick Start Manual

Quick Start Guide
All meter functions are described in detail in the accompanying instruction
manual. For calibration and measurement only a few steps are required.
Step-by-step instructions are given in this guide.

Meter Overview

1. Results and current mode are displayed in the large main field.
2. Channel, ready, and step-by-step prompts are displayed on the lower
prompt display.
3. The keys on the keypad have multiple functions. Their main function is to
enter numeric values. They also have primary functions. These are labeled
in white and are accessed by pressing 1st then the function. Most keys also
have secondary functions. These are labeled in green, and can be accessed by
pressing 2nd, then the function.
4. If you want to escape the sequence you are in, or your are not sure of which
function you are in, pressing 1st and then measure will take you to the
MEASURE mode where you can start again.

Meter Connections

Power

1. Plug line adapter into an appropriate wall outlet.
2. Plug line adapter firmly into power input on rear panel of meter.
Orion 720Aplus pH/ISE Meter

Electrode Connections

1. Remove BNC shorting cap.
2. Attach electrode with BNC
connector by sliding BNC
connector onto electrode input
(1), then push down and turn
clockwise to lock into position.
NOTE: If using a combination
electrode with a BNC
connector, the reference
electrode input (2) is
not used.
3. Attach ATC probe with DIN
connector by sliding the DIN connectors into the ATC probe input (3) until
firmly in place.

pH Measurement Overview

pH measurement is easy and accurate with the Orion 720Aplus. The
meter/electrode system is calibrated with one to five buffers which bracket your
sample pH.
For better accuracy, at least a two buffer calibration is recommended.
The autocalibration feature automatically recognizes 1.68, 4.01, 7.00, 10.01, and
12.46 buffers. For best results, an ATC probe is recommended to compensate for
temperature variation.

ISE Measurement Overview

Direct measurement using ion selective electrodes (ISE's) is fast and convenient
with the Orion 720Aplus. The meter/electrode system is calibrated with one to
five standards of known concentration which bracket sample concentration.
Unknown sample concentration is then read directly from the display in units
used for calibration molarity, ppm, %, etc.
1
2
3
Rec. Gnd. ATC/DIN KF Input 1 Ref.1 Input 2 Ref. 2
BNC Shorting Cap