Sercel GRC DATA PRO, Operation Manual, Page: 36 / 93

Data Pro P/N 10029355 Rev AE
Operation Manual Page 36 of 92
Voltage
’ values. The recommendation is to keep ‘Auto Volt’ enabled for self-diagnostic checks and
optimum communication operation.
Follow the menu steps below to enable/disable the AutoVolt :
Menu

Interface Setup

Interface For Gauge

Config

AutoVolt

Edit
A message displays after its successful execution.
8.5.5.2 Target Signal (AutoVolt Target )
When
‘
Autovolt
’
is enabled, th
e ‘
Target Signal
’
represents the desired signal level seen by the FIC
that is about ½ the desired tool voltage. The default
‘
Target Signal
’
is 9mA, which corresponds to 18V
desired tool voltage as set by the FIC controller.
Follow the menu steps below to change the
‘Target Signal’
:
Menu

Interface Setup

Interface for Gauge

Config

Target Signal

Edit
8.5.5.3 Line Volts (Starting Line Voltage)
If
‘
Auto Volt
’
is OFF,
‘
Line
’
and
‘
COM
’
voltages stay at their default settings. The user can try different
‘
Line Volts
’
values to mitigate the gauge communication problems. The recommended minimum and
maximum Line Volt values are 15V and 27V respectively.
The combined ‘
Line
’ and ‘
COM
’
voltages
cannot exceed 33V as set by the FIC interface for the downhole gauge.
Follow the menu steps below to change the ‘
Line Voltage
’
:
Menu

Interface Setup

Interface For Gauge

Config

Line Voltage

Edit
8.5.5.4 COM Voltage (Communication Voltage)
A general rule is to set the ‘ COM’
voltage to ¼ of the Line voltage (for example, if Line voltage is set to
20, then set COM voltage to 5). The recommended minimum and maximum ‘ COM Volt’
settings are 3V
and 10V respectively. Follow the menu steps below to change the COM Voltage:
Menu

Interface Setup

Interface For Gauge

Config

COM Voltage

Edit
8.5.5.5 Address ( FIC Slave Address )
The installed FICs have Modbus slave
‘ID’ of 1 and 2. Change the FIC slave ID via following menu
steps:
Menu

Interface Setup

Interface For Gauge

Config

Address

Edit
The FIC Modbus slave ID configuration screen will show the allowed range of addresses. The user
enters the new address using the onboard keypad then selects ‘
Save
’. The application will show a
message after the successful change of the Modbus ID.