Initial Preparation - Hanna Instruments HI8510 Instruction Manual

INITIAL PREPARATION

• Connect a 3‑wire cable to the power supply
terminal according to the voltage level as
indicated, and pay particular attention to
the correct line, earth and neutral connections.
• For BNC electrodes, connect the electrode
to the BNC plug on the rear panel.
The instruments are equiped with differential
input. To benefit from differential input
advantages, connect the proper electrode
wire (if available) or a cable with a potential
matching pin, to the Matching Pin (terminal 4).
When the Matching Pin cannot be immersed
together with the electrode in the solution,
disable the differential input by shorting the
Electrode reference and the Matching Pin
terminals with a jumper wire (terminals 3
and 4).
• For amplified electrodes connect the
electrode pH input wire to the AMP INPUT
terminal (1), the electrode power suply
wires to the ±5 V terminals (7, 8) and
the electrode reference wire to the reference
terminal (5). Make a short between Reference
and Matching pin terminals (5, 6).
If the amplified electrode is provided with
BNC connector, connect the electrode to the BNC input and the
power supply wires to the ±5V terminals (7, 8).
• For Inputs from transmitter, connect the 2
signal wires of the analog transmitter to the
"INPUT TRANSMITTER" terminals (7, 8), while
paying attention to the indicated polarity.
Note: Only one of BNC, AMP INPUT or INPUT
TRANSMITTER connectors can be used at
one moment. Leave the other two inputs
unconnected.
• Recorder output terminals: these contacts
are used for connection to a recorder. The
output can be 0‑20 mA or 4‑20 mA depending
on the connection, and is proportional to the
pH or ORP reading.
21
mA OUTPUT
+
4 - 20
-
0 - 20
-
ACID open
ALK. short