Veris Technologies Quad 2800 Soil EC Mapping System - Operating Instructions - Manual (Page 43)

OM17-Quad2800
6-21
Replacing microchip. If microchip fails, or if unit needs updated firmware, it will be necessary to
remove chip and replace with new one. Before chip removal and installation, touch grounded metal
to discharge your static electricity. Remove chip with pliers or chip puller. Install new chip, making
sure that notch in plastic housing is to the right. Be careful to not damage pins of new chip as it is
installed
Figure 9.4
Figure 9.5 a and b. Notch on chip must be to the right, matching notch on chip socket
Q1000 to 3150 Resistor Change. Because the disk-electrode spacing on a Quad1000 model is
different than a 3150, there are unique constants applied to the EC measurement values for each
model. The EC Surveyor Instrument Signal Test Procedure #1 shows the different signal test load
readings for each. For Q1000, 2000XA and 3100 models, a resistor is installed on the circuit
board. For 3150 models the resistor is not used. When the EC Surveyor is purchased with a
Q1000, 2000XA or 3100 models, the resistor is installed, and removed for the 3150 models. If it
becomes necessary to change this in the field, disconnect power cord, remove cover as shown
above and remove or install resistor as shown below.
notch
notch