Thermo Fisher Scientific Alpha DO 1000 User Manual

Page 33

7.7

Current Output (rng) sub-function

This sub-function lets you set the transmitter current output range of this unit. The
difference between the upper and lower range has to be a minimum of 20% in the
“%” mode or 2mg/l in the “mg/l” mode, anywhere on the scale. (Hence, if 4mA =
4mg/l or 20%, then the closest range for the the 20mA = 6mg/l or 40%).

7.7.1

Entering Current Output sub-function

1. Enter Advanced Set-up mode. Push the ENTER

key and scroll to Advanced Set-up security code
“22”. Push the ENTER key again.

2. Press

the

▲ or ▼ keys to scroll until the upper

display shows “rng”. Press ENTER.

7.7.2

Choosing the Output Type

This parameter lets you choose between 0-20 mA or 4-20
mA output.

1. Follow directions in 7.7.1 to enter Current Output

mode.

2. Press

the

▲ or ▼ keys to select your output type:

0 – 20 or 4 – 20 mA.

3. Press

the ENTER key to confirm your selection.

4. Proceed to 7.6.3, or return to Measurement mode

by pressing the

▲ and ▼ keys simultaneously

(escape).

7.7.3

Selecting Dissolved Oxygen Value at 0(4)mA

This parameter lets you choose the Dissolved Oxygen value at which the
transmitter output will be 0(4) mA.

1. Follow directions in 7.7.1 to enter Current Output mode.

2. Press

the ENTER key until the upper display shows a Dissolved Oxygen

value and the lower display shows “r.0(4)”.

3. Press

the

▲ or ▼ keys to select dissolved oxygen value to be equivalent

to 0(4) mA (Default is 2.00mg/l or 0%).

4. Press

the ENTER key to confirm your selection and proceed to 7.7.4 or

return to Measurement mode by pressing the

▲ and ▼ keys

simultaneously (escape).

HOLD

SETUP

2.00

8.00

4-20

.20

mg/l

HOLD

SETUP