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...2 INSTALLATION
1
8
1
0 to 1 mA
0 to 10 mA
Link for the Current
Output required
Input
Module
Temperature Input
Module
Module 1
Fig. 2.4 Selecting The Current Output Range
NC C NO
R
N
L
External a.c. supply
A – a.c. Applications
NC C NO
+
–
External d.c. supply
B – d.c. Applications
Fig. 2.5 Relay Contact Protection
6
8
1
8 1
0 to 20 mA
4 to 20 mA
Captive
Screws
Protection
Plate
Output Module 2
(if fitted)
Output
Relay Contacts
C
Load
Relay Contacts
Diode
Load
3 SETTING UP
Note. Before proceeding any further, ensure that all
8
switches are set to OFF on the right hand side of the
electronics unit – see Fig. 2.3.
a) Ensure that all external electrical and plumbing connections
have been made correctly.
b) Fill reagent and standard solution bottles and connect them to
the monitor. (See Section 8.1 for details of these solutions.)
c) Fit the electrodes according to the instructions in
Section 8.2.5.
d) Connect the electrical supply and switch on.
Note. The temperature controlled flowcell requires up to
half an hour to reach the normal control temperature of 35 °C.
During this time, 'Temp. Control Error' is indicated on the
display and any calibrations are prevented by the
microprocessor.
e) Verify that there is an adequate supply of sample to the
monitor constant head unit.
f) Fit the pump platen on the peristaltic pump (see Section 8.2.6)
and turn on the pump with the switch on the side of the
monitor. Note that the peristaltic pump rotates, and check that
sample and reagents are being drawn into the monitor by
observing the progress of any small bubbles present in the
inlet tubes.
g) Run the monitor for at least one hour to allow the temperature
to stabilize, solutions to be pumped into the system and to
purge the air from the pipework. Check for any leaks around
the pipe connections and rectify as necessary.
h) When the monitor reading has stabilized, carry out a
calibration – see Programming Page.
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