Thermo Scientific AquaSensors™ DataStick™ Measurement System User Guide
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4.2
Differential ORP Measurement
The ORP sensor head has a number of physical features that should be noted. The connector is keyed so it can only be inserted one way
into the DataStick. The key provides protection for the pins during installation. To insure that pins remain free of moisture and dirt, a rubber
boot is supplied with replacement sensor heads and should be kept in place when transferred or placed in storage. In very humid or dirty
environments, we also recommend applying some electrical grease to the connector pins.
Keep the O-Ring and the shaft of the sensor free of dirt. Be sure the DataStick cavity is also free of dirt and moisture prior to insertion.
4.2.1
ORP Interface Overview
When an ORP sensor head is installed in the DataStick, AquaComm™ will automatically display millivolts, temperature, sensor type
and DataStick serial number. Pull-down menus will also automatically provide calibration, configuration and diagnostic choices for ORP.
Factory default configurations for an ORP sensor head are:
•
Units of measure:
millivolts (mV)
•
Units for temperature:
°C
(options include °F)
•
Sensor Filter:
1 Second
(options include 0 to 100 seconds in 1 second increments)
•
Temperature Filter:
1 Second
(options include 0 to 100 seconds in 1 second increments)
Connector Key
Retaining Ring
Locks the sensor head
into the DataStick body
Encapsulated
Product Number/
Serial Number
Platinum electrode inside
concentric stainless steel
ground rod
Quad-Junction
Allows ion exchange
to reference chamber
Removable
Salt Bridge
(Other bridge profiles, materials
and salt formulas available).
Gold Pins
O-Ring
Water tight seal
