GDP-32
II
INSTRUCTION MANUAL
January 2003 Section 8, Page 4
Array Type
Select one of the seven array types using the
Home
SELECT UP
and
SELECT DN
End
keys:
Dipole-Dipole D-D
Pole-Dipole P-D
Schlumberger Sch
Gradient Grd
Pole-Pole P-P
Downhole D-H
Core Sample LAB
If Gradient or Schlumberger arrays are chosen, then two additional lines, Ax
location and Bx location appear in the menu. These are the transmitter current
electrode locations.
If the Downhole array type is chosen, resistivities will not be calculated or displayed.
The Core Sample selection provides for input of cross-section area and length of core
samples (in centimeters) to get correct resistivity values (in square centimeters). After
continuing to the Data Acquisition Screen, press to input the length, area and current
monitoring shunt resistor values.
Ref Mode Shunt
When Reference Mode is selected, enter a value for the Reference Mode Shunt. The default
value is 1.000Ω.
Gain Mode
Select one of the two gain modes using the
Home
SELECT UP
and
SELECT DN
End
keys:
• Noisy
(Default Selection) – Limits the gains to obtain a maximum of 1.0 Volts, leaving
headroom for SP drift and random noise spikes.
• Standard
Adjusts the gains for a maximum voltage of 2.25 Volts.
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