User Manual

CellNet Pit MIU Master Rev. 1.0
04/14/99 3:13 PM
6
Follow these guidelines when selecting a location to install the CellNet-Ready Pit MIU (ProRead
Only):
•
For best results, Schlumberger recommends mounting the MIU in a location that provides a
direct line-of-sight to the MCC.
•
The selected location should be clear of all obstructions.
•
Avoid installing the MIU behind metal fences or walls.
•
RF line-of-sight must be verified to a nearby MCC for improved signal strength.
Table 2.3 Maximum Cable Lengths
Encoder Register Maximum Cable Length
Schlumberger PRO-READ
®
* 500 feet (152 meters)
* Meets manufacturers’ published specification for wire length between encoder and remote receptacles.
Verifying/Preparing the Encoder Register
The CellNet-Ready Pit MIU (ProRead Only) is designed for use with Schlumberger ProRead
Encoder Rev. C, D and E.
Before installing an MIU, the encoder register must be correctly wired and/or programmed to work
with the MIU.
Note: T
he Pro-Read
®
encoder must be programmed for three-wire mode using a Pro-Read
®
Programmer and it’s ten-digit TDI format. Do this through the Pro-Read
®
receptacle before
removing the receptacle. For more information about Pro-Read
®
programmers, contact your
Schlumberger sales representative.
A three-conductor wire is required to connect the MIU to the encoder. Refer to Steps 1 - 9 in this
procedure for that information.
If a three-conductor cable already connects a Pro-Read
®
encoder register to a Pit-mounted
receptacle, verify the Pro-Read
®
is programmed for three-wire mode.
If a three-conductor cable already connects a Pro-Read
®
encoder register to a Pit-mounted
receptacle, the cable may have to be extended to a location that is appropriate for mounting the
MIU. Refer to the section “Splicing a Three-Conductor Cable.”
Connecting the MIU to the ProRead
®
encoder:
1. Remove the terminal screw cover from the encoder register.
2. Strip off 3/4" from the jacket of the three-conductor cable.
3. Strip off 1/2" of insulation from each of the three wires.
4. Connect one wire to each terminal screw as described in Table 2.4 and shown in Figure 2.4.