Orion 710A plus Quick Start Manual
Electrode Connection
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 710Aplus. 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 710Aplus. 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.
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Quick Start Guide
Orion 710Aplus pH/ISE Meter
All meter functions are described in detail in the accompanying instruction
manual. For calibration and measurement only a few steps are required, and stepby-step instructions are given in this guide.
Meter Overview
1. Results are displayed in the large main field of the display.
2. Mode is indicated by ▼ along the bottom of the display corresponding to the
legend below it.
3. Some of the keys on the keypad have multiple functions. Their primary
functions are labeled in white. For those with secondary functions, these
functions are labeled in green, and are accessed by pressing 2nd then
the function.
4. The parameters in the setup menu are preset to typical values and usually do
not require changing. Please see instruction manual if changing parameters
is necessary.
5. If you want to escape the sequence you are in, or you are not sure of which
function you are in, pressing measure will take you to 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.
Quick Start Guide
Orion 710Aplus pH/ISE Meter
Calibration of Ion-Selective Electrodes (ISE) with
Two Standards
1. Select concentration mode by pressing mode until ▼, the mode indicator, is
aligned with the conc legend along bottom of display.
2. Place electrode(s) into most dilute standard and stir moderately.
3. Press 2nd then cal to begin calibration. The date and time of the last
calibration will be displayed. “P1” will also be displayed indicating meter is
ready for the first standard.
4. When “READY” is displayed beside the reading, indicating electrode
stability, the reading will flash. Use the scroll keys, ▼▲, to enter the
correct value:
a. Press ▼ or ▲ key, the decimal point will flash. Press ▼ or ▲ repeatedly
to position the decimal point and press yes.
b. The first digit will then flash. Scroll to the correct value and press yes.
c. Continue step b for each digit on the display. When completed, the
standard value is stored and the meter display freezes for three seconds.
5. The meter automatically switches to standard 2, indicated by “P2’ on
the display.
6. Remove electrode(s) from first standard. Rinse with deionized water.
7. Place electrode(s) into second standard and stir moderately.
8. When “READY” is displayed beside the reading, follow repeat step 4 to enter
the correct value of the standard.
9. Press measure to end calibration. The electrode slope is calculated and
displayed for five seconds. Meter automatically proceed to MEASURE mode.
10. Remove electrode(s) from standard. Rinse with deionized water.
11. Place electrode(s) into sample. When “READY” is displayed next to the
reading, record the sample results.
See the appropriate electrode instruction manual for preparation of sensing and
reference electrodes, required solutions (ionic strength adjusters, standards, etc.)
and other special requirements. For best results during calibration, always use the
most dilute standard first, and always use a fresh aliquot of standard.
pH Autocalibration with Two Buffers
1. Select pH mode by pressing mode until ▼ the mode indicator, is aligned with
pH legend along bottom of display.
2. Place electrode(s) into pH 7 buffer and stir moderately.
3. Press 2nd then cal to begin calibration. The date and time of the last
calibration will be displayed. “P1” is also displayed indicating meter is ready
for the first buffer.
4. When “READY” is displayed beside the reading, indicating electrode
stability, the reading will flash. Press yes. The buffer value is stored and
meter display freezes for three seconds. The meter automatically switches to
buffer two, indicated by the “P2” on the display.
5. Remove electrode(s) from first buffer. Rinse with deionized water.
6. Place electrode(s) into second buffer and stir moderately.
7. When “RDY” is displayed beside the reading, press yes.
8. Press measure to end calibration. The electrode slope is calculated and
displayed for five seconds. Meter automatically proceeds to
MEASURE mode.
9. Remove electrode(s) from buffer. Rinse with deionized water. Place
electrode(s) into sample. When “READY” is displayed beside the reading,
record the sample results.
233943-001 Rev.C
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