Alpha 2000 User Manual download pdf (Page 8)

Thermo Scientific / Alpha Process Products / 2000 Series Controllers / www.thermo.com/process8

pH/ORP:

Built for the rugged industrial

environment, the Alpha pH 2000

transmitter comes with an option

for symmetrical mode of operation,

making it ideal for electrically noisy

environments. IP65 NEMA 4X casing

is weatherproof and corrosion-

resistant, protecting meter against

harsh elements.

The Alpha pH 2000 is user-friendly

and intuitive: controller alerts

when meter or electrode requires

maintenance, and provides trouble-

shooting prompts in plain language.

• Wide pH range of -2.00 to 16.00

pH at two-decimal accuracy

• ORP mode measures in mV or %

concentration, with independent

calibration modes

• Quick, easy push-button calibration

with auto-buffer recognition.

Meter displays electrode status

after each calibration

• Accepts Antimony electrodes –

useful in applications involving

Hydrofluoric (HF) Acid

• Control and measure pH and

ORP simultaneously with

master-slave operation by placing

two controllers side by side

Thermo Scientific Alpha pH 2000

pH/ORP Controller/Transmitter:

Asymmetrical

pH Combination

Electrode

Measuring Cable

BNC

pHTemp.

3

0 / PA

2 1 22 27

PE N L S

Asymmetrical mode works well in

environments with where there is

little or no electrical noise. When

there is electrical noise, the noise

acts as a common signal and is

picked up by both the pH and the

reference electrodes. However,

since the reference electrode is

grounded to the ground potential of

the amplifier, electrical noise will be

present only on the pH electrode.

This noise is amplified along with

the pH signal, which causes reading

fluctuations in an electrically noisy

atmosphere. Electrical noise from

a DC source (as in an electroplating

tank) will typically result in stable but

incorrect values.

Symmetrical mode avoids

grounding the reference electrode

by reconfiguring the input to a

floating differential mode. The

electrical noise appears equally on

the pH and reference electrodes,

and is therefore rejected by the

operational amplifier.

The Alpha pH 2000 transmitter offers

an option for Symmetrical Mode

of Operation. To take advantage of

Symmetrical operation, you must

have an electrode with a solution

ground (potential matching) pin.

If your electrode does not have a

solution ground, be sure to set the

controller to Asymmetrical mode.

Symmetrical

pH Combination

Electrode

Potential

Matching Pin (PM)

Measuring Cable

BNC

pHTemp.

0 / PA

3 2 1 22 27

PE N L S

1 2 3 4 5 6 7 8 9 10 11 12 13 ... 23 24

Comments to this Manuals

No comments