Install Temperature Sensors; Wiring Information; Pcbs - YSI MultiDO 5400 User Manual

Figure 3.12a
Directions to prepare the ODO probe for the first time:
1. Remove the metal probe guard from the probe by turning it counterclock-
wise.
2. Remove the red storage cap which contains a moist sponge from the end of
the probe by pulling it straight off the sensor. Save this to use later for long
term storage.
3. Reinstall the probe guard by sliding it carefully over the sensor and then
threading it onto the cable/probe assembly with a clock.
4. Calibrate probe - page 83.
Notes:
- A new cable/probe assembly already has a sensor cap installed and the sensor
cap coefficients are preloaded into the probe at the factory.
- Perform ODO calibration whenever ODO caps are replaced see Calibration
page 83.

Install Temperature Sensors

The 5X00 system will support 4 Temperature/Aux Analog inputs. Temperature
sensors are included on YSI 5421 (galvanic) and 626250 sensor and/or sensor as-
semblies. Alternate temperature sensors can be used but must be thermistors with
10K at 25˚C . See Appendix 6 Alpha Curve - page 256.
After installing the temperature sensor in its monitoring location, see Wire Tem-
perature Sensors - page 52.
Probes should be serviced on a regular basis. See Probe Maintenance - page 211.
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Wiring Information

System components must be wired correctly to ensure reliable performance and
accurate data collection. Directions are provided on the following pages for wiring
all components and peripheral devices.

PCBs

There are four printed circuit boards (PCBs) inside the 5X00 enclosure. They are:
- Display board (mounted in the front panel)
- I/O board is attached to a metal plate inside the enclosure and is visible when
front panel is removed
- DO daughter board mounted to the I/O Board
- Control board (connected to the under side of the I/O Board)
Notes:
- I/O board and control board (including DO daughter board) are attached to
a metal plate and are referred to as the "lower board assembly". See Control
Board - page 42.
- No 5X00 components or peripheral devices are wired to the display or DO
daughter board.
Most components including: power, Aux input, network, relay output, and RS232
communication components are terminated on the I/O board. 5X00 ground wire
and sensor ground wires (also called drain wires) are terminated to the metal plate
that is attached to the lower board assembly. The optional serial to ethernet device is
installed on the control board. The front panel must be removed when wiring 5X00
components and peripheral devices. See Accessing the I/O Board - page 40. It is
recommended that some system configuration and testing be done in conjunction
with hardware installation. This will ensure that the 5X00 system is wired correctly.
Necessary configuration information (from Chapter 4 - "Configuration") is referenced
in the applicable test system procedure.
WARNING: Follow all safety information and local electrical codes when wiring
5X00 system components and peripheral devices. Proper wire gauge should be
determined based on voltages and wire/cable length. Incorrect wiring can result
in damage to you or equipment. Ground loops can also result due to improper
wiring.
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