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1066 Instruction Sheet
July 2013 LIQ_MAN_ABR_1066-CT-HT-FF-FI
Input: One isolated sensor input. Measurement choices of
pH/ORP, resistivity/conductivity/TDS, % concentration,
t
otal and free chlorine, monochloramine, dissolved oxy-
gen, dissolved ozone, and temperature. For contacting
conductivity measurements, temperature element can be
a PT1000 RTD or a PT100 RTD. Other measurements
(except ORP) and use PT100 or PT1000 RTDs or a 22k NTC
(D.O. only).
Power & Load Requirements: Supply voltage at the
transmitter terminals should be at least 12.7Vdc. Power
supply voltage should cover the voltage drop on the cable
plus the external load resistor required for HART commu-
nications (250 Ω minimum). Minimum power supply volt-
age is 12.7Vdc. Maximum power supply voltage is 42.4
Vdc (30 Vdc for intrinsically safe operation). The graph
shows the supply voltage required to maintain 12 Vdc
(
upper line) and 30 Vdc (lower line) at the transmitter ter-
minals when the current is 22 mA.
Analog Outputs: Two-wire loop powered (Output 1
only). Two 4-20 mA electrically isolated current outputs
(Output 2 must be externally powered). Superimposed
HART digital signal on Output 1. Fully scalable over the
operating range of the sensor.
Weight/Shipping Weight: 2 lbs/3 lbs (1 kg/1.5 kg)
1500
1250
1000
750
500
250
0
Load, ohms
with HART
communication
without HART
communication
12 18 24 30 36 42
545
ohms
1364
ohms
Power supply voltage, Vdc
HART option
FIGURE 2. Power Supply-Current Loop Wiring
FIGURE 1. Load/Power Supply Requirements