Hach Sigma 950, Инструкция по эксплуатации инструмента

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Optional Device Installation
3. Enter the temperature of the first buffer solution using the numeric keypad. Press
ACCEPT
to continue.
4. Press the
CHANGE CHOICE
to select the pH for the first buffer solution (4, 7, or 10
pH), then press
ACCEPT
to continue.
5. Remove the probe from the first buffer solution, rinse it under distilled water and
place it into the second buffer solution (4, 7, or 10 pH, different from the first buffer
used). Press any key to continue.
6. Press
CHANGE CHOICE
to select the pH for the second buffer solution, then press
ACCEPT
to continue.
A “pH Calibration Failed-Gain And/Or Offset Out of Range, Try Again” error message will
be displayed if the pH probe is damaged, cannot be calibrated, or if the buffer solutions
do not fall within an acceptable range.
Make an attempt at reading the second buffer solution after pressing a key. If this fails, it
is likely that you have a poor pH probe or poor buffer solutions. Try a new set of buffer
solutions. If that fails try a different pH probe.
7.3 ORP Probe
7.3.1 ORP Probe Connection
Note: There is no temperature sensor on the ORP sensor.
The ORP probe consists of three wires: a clear wire, a black wire, and a red wire. The
pre-amp required interface is a 6-pin connector on one end and a junction box with
terminal strips on the other end (P/N 2078).
1. Attach the clear wire to either screw on the terminal strip labeled GLASS.
2. Attach the black wire to the REF screw on the other terminal strip.
3. Attach the red wire to the GND screw on the terminal strip.
7.3.2 ORP Programming
1. From the Main Menu, select
OPTIONS>ADVANCED OPTIONS>DATALOG.
2. Highlight Select Inputs using the
UP
and
DOWN
soft keys and then press
SELECT
to
continue.
3. Highlight ORP using the
UP
and
DOWN
soft keys, then press
SELECT
to continue.
4. Press
CHANGE CHOICE
to cycle between Logged and Not Logged, then press
ACCEPT
to continue.
5. Enter a logging interval using the numeric keypad, then press
ACCEPT
. Valid logging
intervals are shown on the status bar along the bottom edge of the display.
Table 18 ORP Connector Pin Assignments
Pin Signal Description
A +5 V dc
B ground
C reference
D pH/ORP
E -5 V dc
F RTD