6
CI/AHM550–EN Rev. D
6
Setup
This section describes how to set up the analyzer up for first-time
use.
If multiple wet-sections are being connected to 1 transmitter, an
additional setup procedure is required – refer to Operating
Instructions (OI/AHM550-EN).
Transmitter start-up
Ensure all electrical connections have been made and switch the
power
on
to
the
transmitter.
If
the
wet-section
is
being
commissioned for the first time, calibration and programming of
parameters is required – complete steps 1 to 13, then follow the
instructions from step 14 onwards to complete setup at the
transmitter.
Setting up the wet-section
Referring to Fig. 5:
1. Fill the hydrazine sensor assembly with fresh gel as follows:
a. Holding the black closure cap tightly in place on the filling
syringe, snap the syringe plunger into position and remove
the black closure cap.
b. Slowly inject the filling gel through the lower hole in the
outer jacket until it reaches the top hole.
c. Remove the syringe and replace its closure cap.
d. Fit lower 10-32 UNF blanking plug
A
.
e. Fit upper 10-32 UNF blanking plug
B
.
2. Push the hydrazine sensor assembly
C
into clip
D
on the
sub-panel, ensuring sensor outlet tube
E
is positioned
directly above drain tundish
F
.
3. Connect the tube
G
from the mixing / delay coil to inlet
nipple
H
.
4. Connect the hydrazine sensor
I
(red) and temperature
sensor
J
(blue) electrical connectors to the appropriate
color-coded sockets on the hydrazine sensor connector
block.
5. Set up an appropriate sample flow into the wet-section –
check that the solution weirs over the adjustable overflow pipe
in the constant-head unit and flows through the sensor.
6. Remove reagent tube
K
from membrane clamp
L
, situated
on the top of the reagent dosing chamber
M
.
7. Place a small beaker into the main case and hold the end of
reagent tube
K
over it to enable the reagent to flow through
the tube to displace any air bubbles.
8. Reconnect reagent tube
K
to membrane clamp
L
.
9. Remove mixing / delay coil tubing
G
from reagent dosing
chamber outlet
N
.
10. Establish flow through the new disc by clamping the sample
inlet tube
O
and applying suction from a plastic syringe to
the reagent dosing chamber outlet
N
.
11. Refit the mixing / delay coil tubing
G
to the reagent dosing
chamber outlet
N
.
12. Remove the clamp from sample inlet tube
O
.
13. Allow approximately one hour for caustic dosing to be
established (the pH of the effluent at the sensor outlet must be
at least 10.5).
Analyzer accuracy is dependent on the flow rates of the
standard and sample through the sensor. The flow rates have
been pre-set at the factory but, to ensure accuracy, it is
advisable to check the flow rates and adjust if necessary –
refer to the Operating Instructions (OI/AHM550-EN) for flow
rate values.
At the transmitter:
14. Calibrate the transmitter as described in the Commissioning
instructions (CI/AWT540-EN).
15. Access the Configuration level menus as follows:
a. Press the
key (below the
icon).
The
Operator
menus are displayed:
Caution.
Do not attempt to set up the analyzer unless the
wet-section and transmitter are fully installed and ready for
operation.
Warning.
The wet-section uses chemical solutions in its
operation. Suitable precautions must be taken to ensure safe
handling.
Note.
Hold the sensor firmly at the top so that the centre
portion is not pushed out when the tube is connected.
CAL
2012–04–15
10 : 34: 52
4.28
4.28
°C
21.7
21.7
Navigator
ppb
N2H4
Tag 1
2012–04–15
10 : 34: 52
4.28
4.28
°C
21.7
21.7
Navigator
Operator Pages
Data Views
Logs
Alarm Acknowledge
Manual Hold
Autoscroll
Media Card
Enter Configuration
ppb
