Multi-parameter transmitter user’s manual – Aquametrix SHARK TX / TXP Transmitters User Manual User Manual

Page 30

MULTI-PARAMETER TRANSMITTER USER’S MANUAL

pH - Output Menu - 4-20mA Output 4.15

pH - Output Menu - 4-20mA Output 4.15

Page 28

DOWN

Press the key once
which will move the cursor
back to the RH side of the
display.

Or press the
key to highlight
the Y character

Then press the key to store the
selection and return to the OUTPUT
menu

Not stored

Stored

Press the key to accept the
setting and move to the next setting

NOTE

PRESS THE AND KEYS

TOGETHER TO GO IMMEDIATELY BACK TO

RUN MODE

DOWN

The TUNE fuction allows the user to precisely
adjust the 4-20 ma output to compensate for
any errors in the output circuitry. Normally,
fine tuning the 4-20mA output is not
necessary.
To make the adjustment, place an accurate
current meter in series with the 4-20 mA
output, with the appropriate loads connected.
When the TUNE menu is selected, the
controller puts 20 mA out the terminals. Use
the or keys to adjust the 20mA
output to get exactly 20.

The TUNE value can be adjusted over the
range from 0 to 1000, these are unitless
numbers used for tuning purposes only.

RUN MODE

With "N" selected, pressing the
key will NOT store the selection, but
simply return to the OUTPUT Menu. This
function is useful if you wish to view the
current selection without making any
changes.

The example below shows the 4-20 mA set to 4mA =7.00pH and 20mA = 14pH.
The output would then span 4 to 20 mA for a pH swing of 7.0 to 14.0.
Note that the span can reversed, in that 4 mA can be set to a high pH value, and 20
mA can be set to a low pH value, effectively reversing the control direction.

Use the and
keys to change the setting

If you wish to change the setting,
press the key once which will move the cursor
to the first character of the value to be changed

Press the key to accept the
setting and move to the next setting

Use the and
keys to change the setting

If you wish to change the setting,
press the key once which will move the cursor
to the first character of the value to be changed

Use the and
keys to change the setting

Press the key to accept the
setting and move to the next
setting

Press the key once
which will move the cursor
back to the RH side of the
display.

Press the key once
which will move the cursor back
to the RH side of the display.

The Transmitter has a single 4-20mA output, electrically
isolated from the ground. The output can source current into a
maximum of 800 ohms. See Section 3.9 for wiring diagram.
The channel has a fully adjustable 4 & 20 mA output
adjustments. This will enable the operator to span the output
over the desired range.

STORE? Y N

4-20mA PROC

20mA TUNE 54 0 >

4-20mA PROC

20mA TUNE 54 0 >

4-20mA PROC

OUTPUT

CALIBRATION

DIAGNOSTICS

UTILITIES

SETUP

7.15pH 25.0C

4-20mA

20mA TUNE 512 >

4-20mA PROC

20mA OUT 14.00 >

20mA TUNE 51 2 >

4-20mA PROC

20mA OUT 14.0 0 >

20mA OUT 14.00 >

20mA OUT 14.0 0 >

4-20mA PROC

4mA OUT 0.00 >

4-20mA PROC

4mA OUT 7.00 >

4mA OUT 7.0 0 >

4-20mA PROC

4mA OUT 0.0 0 >