Campbell 110PV, Инструкция по эксплуатации

Страница: 19 / 38

110PV Surface Temperature Probe
11
7.4 Submersion
The 110PV can be submerged to 15 m (50 ft). It must be adhered to a dry,
clean surface before submerging. The probe’s adhesive mounting strip is not
intended for submersion. Therefore, the 110PV must be mounted to the
measurement surface with a user-supplied method that is compatible with
submersion.
Do not use epoxy to secure the 110PV to a PV module.
7.5 Wiring
When Short Cut software is used to generate the datalogger
program, the sensor should be wired to the channels shown on the
wiring diagram created by
Short Cut
.
Connections to Campbell Scientific dataloggers are given in TABLE 7-1 .
Most CRBasic dataloggers can measure the 110PV using either a 4-wire half
bridge or 3-wire half bridge. The CR200(X) dataloggers can only use a 3-wire
half bridge. The 4-wire half bridge method is preferred because it reduces
cable errors. The 4-wire half bridge method requires two differential input
channels and one voltage excitation channel. The 3-wire half bridge method
uses one single-ended input channel and one voltage excitation channel.
Multiple probes can be connected to the same excitation channel. The number
of probes per excitation channel is physically limited by the number of lead
wires that can be inserted into a single voltage excitation terminal,
approximately six.
TABLE 7-1. Connections to Campbell Scientific Dataloggers
Color Description
4-Wire
Half Bridge
3-Wire
Half Bridge
Black Voltage Excitation Voltage Excitation Voltage Excitation
Red Signal Differential Input (H) Single-Ended Input
Purple Signal Reference Differential Input (L)
⏚
Blue Signal Reference
⏚
Not Used
Clear Shield
⏚ ⏚
Green Sense + Differential Input (H) Not Used
White Sense – Differential Input (L) Not Used
7.6 Datalogger Programming
Short Cut
is the best source for up-to-date datalogger programming code.
Programming code is needed,
• when creating a program for a new datalogger installation
•
when adding sensors to an existing datalogger program
CAUTION
NOTE