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2468CB & 2468CD Dual Power Supply Version Hydrastep 2468CB and 2468CD Manual
2-20 24685034
2.5.2 DISPLAY BOARD 24680515
The Display Board needs to know how many electrodes are being used and if one or two input
boards are being used. A centrally mounted dual-in-line switch assembly, SW1 (titled “Number
of Electrodes”) uses four individual switch channels to select between an 8 and 32 electrode
operation as shown in Table 2.2 below. A socket LK1 (situated near switch SW1) is provided to
link the two halves of the display board together with a link header when only one input board is
used. In this case when two input boards are being used, the link header is not fitted.
Sockets are also provided at LK2, LK3, LK4 and LK5 locations (see Figure 2.5), to select an
8 - 16 (two LEDs per electrode) display mode or an 18 - 32 (one LED per electrode) display
mode. For hazardous area applications, links 2, 3, 4 and 5, when fitted, must be secured
into the sockets using a cable tie passed underneath the socket base.
SWITCH SW1 NO. OF ELECTRODES LINKS 2-5
CHANNEL NO. IN WATER PER INPUT LINKS LINKS
1 2 3 4 COLUMN BOARD 2 & 4 3 & 5
Off Off On On 8 4
On On Off On 10 5 Fitted Not
Off On Off On 12 6 Fitted
On Off Off On 14 7
Off Off Off On 16 8
On On On Off 18 9
Off On On Off 20 10
On Off On Off 22 11
Off Off On Off 24 12 Not Fitted
On On Off Off 26 13 Fitted
Off On Off Off 28 14
On Off Off Off 30 15
Off Off Off Off 32 16
Table 2.2 - Number of electrodes being displayed
2.5.2.1 Link LK1 Setting
Ensure that link header LK1 is not fitted (see Figure 2.5).
2.5.2.2 Configuring the ‘Number of Electrodes’ Switch
WARNING Mains voltages are present in this instrument when power
is connected. De-energise before opening front cover.
1. Disconnect the power supply. Gain access to PCB 24680515 by opening the cover.
2. Locate position of ‘Number of Electrodes’ switch SW1 see Figure 2.5.
3. Depending upon the number of electrodes being used, set the switches as defined in
Table 2.2. The switch positions in the example shown are for a twelve electrode system.