Chapter
5
|
Conductivity Measurement Module
Conductivity Verification Procedure
Use the Orion Star series conductivity verification kit, Catalog Number 1010001, to verify the
accuracy of the conductivity measurements on the V
ERSA
S
TAR
meter with conductivity module.
The conductivity value for each resistor should fall within the relative accuracy of the
resistor
(±0.1 % of the actual conductance of the resistor) plus the relative accuracy of the meter
(±0.5 % of reading ±1 digit for conductivity readings greater than 3 μS/cm and ±0.5 % of
reading ±0.01μS/cm for conductivity readings less than or equal to 3 μS/cm).
1.
Ensure that the conductivity resistor kit is certified and calibration date valid.
2.
Press the
f1 (Cal) key to start the calibration.
a.
If more than one channel is displayed
in the measurement mode, press the
▲ or
▼
key to highlight the desired channel and press the
f3 (Select) key.
3.
Press the
f2 (Cell K) key, wait for the cell constant value on the meter to stabilize and press
the
f3 (Clear) key. Use the numeric keypad to enter the cell constant value as “1.000” and
press the
f2 (Accept) key to confirm the entered value.
4.
Press the
measure (esc) key to proceed to the measurement mode.
5.
Connect a resistor to the meter, press the
measure (esc) key, wait for the measurement
value to stabilize and record the conductivity value of the resistor. Repeat the
procedure for
all six resistors in the kit.
Resistor Number Nominal Resistance Nominal Conductance Nominal Acceptance Range
1010001-A
1000 KΩ
1 μS
0.984 to 1.016 μS
1010001-B
100 KΩ
10 μS
9.930 to 10.07 μS
1010001-C
10 KΩ
100 μS
99.30 to 100.7 μS
1010001-D
1 KΩ
1000 μS
993.0 to 1007 μS
1010001-E
100 Ω
10 mS
9.930 to 10.07 mS
1010001-F
10 Ω
100 mS
99.30 to 100.7 mS
Note: These are the nominal values for the resistors only. The actual resistance and
conductance is printed on each resistor and the actual acceptance range must be calculated
from the actual value on each resistor.
Thermo
Scientific
Orion V
ERSA
S
TAR
Meter User Manual
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63
6
RDO/DO Measurement Module
Connecting
Electrodes to the Module
To begin using the V
ERSA
S
TAR
meter and module system, prepare the meter and insert the
module into an available channel on the back of the meter. See
Chapter 2 Meter Basics
for
instructions. For information on customizing meter settings, refer to
Chapter 3 Setup Menu
.
Ø
It is recommended that electrodes be placed in the meter-attached electrode stand for easy
movement in and out of beakers during calibration, sample measurement and storage.
VSTAR-RD
V
ERSA
S
TAR
RDO/Dissolved Oxygen Module
1.
Connect the dissolved oxygen (DO) probe to the 9 pin MiniDIN connector on the module.
The temperature will also be measured when the DO probe is connected.
Ø
An Orion RDO optical DO probe or Orion polarographic DO probe can be connected
and the meter will automatically detect the probe type.
2.
Prepare the DO probe for use as instructed in the probe user manual.
C H A P T E R 6
9 pin MiniDIN
64
|
Orion V
ERSA
S
TAR
Meter User Manual
Thermo Scientific
Chapter
6
|
RDO/DO Measurement Module
Channel 1-4 Setup Menus
Mode Menus for Dissolved Oxygen
Within the Channel 1, Channel 2, Channel 3 and Channel 4 setup menus are Method, Mode
and Temperature submenus, which can be used to customize measurement settings and
parameters for the selected channel. This section provides detailed information on the Mode
menus for each measurement parameter available when using a RDO/DO module.
1.
In
the measurement mode, press the
setup key.
2.
Press the
◄ or
► key to highlight Channel 1, Channel 2, Channel 3 or Channel 4 (channel
number the module is connected with) and press the
f3 (Select) key.
3.
Press the
◄ or
► key to highlight Mode and press the
f3 (Select) key.
4.
Press the
▲ or
▼ key to highlight a menu option and press the
◄ or
► key to highlight a
submenu option. Onscreen text prompts provide instructions for changing the parameters.
a.
Use
the popup keypad screen
for
Electrode SI No and Sample ID. Press the
▲, ▼, ◄ or ►
key to highlight an alphanumeric character (numeric only for
Auto Increment Sample ID),
p
ress the
f2 (Enter) key to input the character and repeat until the desired label is
entered. Press the
f1 (Done) key to save the entry.
Thermo Scientific
Orion V
ERSA
S
TAR
Meter User Manual
|
65