Installation
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BPD17 pH / Redox Monitor
Operating Guide
Relay Connections
The BPD17 is supplied with 2 normally open volt free relays designated 1 & 2, The relay
contacts are connected to the terminals only and are electrically isolated from the
instrument itself. They must be connected in series with a 5 Amp fuse. A contact arc
suppressor may be required to prevent excessive electrical noise, depending upon the
load. To switch more than 5 Amps will require a slave relay.
Relays 1 & 2 Connection Details
Current Output Connections
The BPD17 is supplied with a single current output, which can terminate into a load
resistance not exceeding 750. For best noise immunity use a screened twisted pair cable,
with the screen connected to Earth at one end. Use a sufficiently large cable to avoid a high
resistance in the overall current loop.
Current Output Connection Detail.
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