Pason PIT-BULL User Manual
Pit Volume Totalizer (PVT) User Guide
Canadian Version
Revised February 11, 2013
Revision 5 of DOCU006
Revised February 11, 2013
Revision 5 of DOCU006, © Copyright
Page 2 of 28
This document contains proprietary information and is not intended for public distribution. Pason
Systems and all other trademarks and trade names used in this document, unless otherwise
specified, are the property of Pason Systems Corp.
No part of this document may be reproduced by any means, nor transmitted, nor translated, nor
translated into computer language, in whole or in part, without written permission from Pason
Systems Corp.
As updates and modifications occur, a new document will be made available as appropriate.
The revision date on the title page determines the most current version of the document.
Documents with the latest date replace any and all previous versions of the same document.
The most current is definitive in case of contradictions, errors, omissions, or misstatements.
While all reasonable care has been taken in the preparation of this document, no liability is
accepted by the author(s) for any errors, omissions or misstatements it may contain, or for any
loss or damage, howsoever occasioned, to any person relying on any statement or omission in
this document.
Copyright © 2013 Pason Systems Corp.
Any questions regarding this document or others should be forwarded to the following:
Pason Systems Corp.
6130 – 3rd Street S.E.
Calgary, Alberta T2H 1K4
Canada
Phone: 1-403-301-3400
Fax: 1-403-301-3499
Email: info@pason.com
Website: www.pason.com
For 24-hour support, phone Pason Technical Support toll free: 1-877-255-3158
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Table of Contents
1 Specifications .................................................................................... 7
1.1 Display Unit Specifications ............................................................................. 7
Input Power Requirements ...................................................................................... 7
Environmental Specifications ................................................................................... 7
Physical Specifications ............................................................................................ 7
Technical Specifications .......................................................................................... 7
Functional Specifications ......................................................................................... 8
1.2 J Box Specifications ....................................................................................... 8
Input Power Requirements ...................................................................................... 8
Environmental Specifications ................................................................................... 8
Physical Specifications ............................................................................................ 9
Technical Specifications .......................................................................................... 9
Functional Specifications ......................................................................................... 9
2 Installation ....................................................................................... 10
2.1 Installing in Hazardous (Class 1, Div. 2) Locations ...................................... 10
Non-Incendive Field Wiring for Class 1, Div. 2, Groups B, C, & D ...........................10
Equipment Suitable for use in Class 1, Div. 2, Groups B, C, & D ............................10
Suitability of Associated Equipment ........................................................................10
2.2 Mounting the Equipment .............................................................................. 10
Mounting the Display Unit .......................................................................................10
Mounting the J Box .................................................................................................11
Mounting the Tank Sensor ......................................................................................11
Mounting the Flow Paddle ......................................................................................11
Installing Wiring and Cabling ..................................................................................11
3 System Calibration .......................................................................... 13
3.1 Calibration Mode .......................................................................................... 13
3.2 Calibrating the Volume System .................................................................... 14
3.3 Calibrating the Flow System ........................................................................ 14
3.4 Calibrating the Tr ip S y s tem .......................................................................... 16
Calibration Channels ..............................................................................................17
Calibration Switches ...............................................................................................17
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4 System Operation ............................................................................ 18
4.1 Operating the Volume Sy st em ..................................................................... 18
4.2 Operating the Flow System .......................................................................... 20
4.3 Operating the Trip Tank Sys tem .................................................................. 22
4.4 Operating the Mud Pump System ................................................................ 23
5 System Maintenance ....................................................................... 24
5.1 Maintenance Warnings ................................................................................ 24
5.2 Troubleshooting ........................................................................................... 24
Troubleshooting the Volume System ......................................................................24
Troubleshooting the Flow System ...........................................................................26
Troubleshooting the Mud Pumps System ...............................................................26
General Troubleshooting ........................................................................................26
Troubleshooting Summary ......................................................................................27
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General Description
The Pason Pit Volume Totalizer (PVT) system is a high-quality microprocessor-based
instrumentation package, comprised of four main functions. The system measures,
calculates, and displays signals from the main mud system, the trip tank system, the
return flow system, and both main mud pumps.
Figure 1 PVT face plate
The Pason PVT system is specifically designed to withstand the harsh environmental
extremes encountered in the Canadian drilling industry. The main display unit is
equipped with a 100-watt thermostatically controlled heater. This allows for operation in
ambient temperatures down to -45°C without any degradation in performance.
The unit is water-resistant and is designed to operate reliably under the adverse
conditions found on drilling rigs. All panel switches are environmentally sealed and have
a water-tight panel seal installed to provide protection from the elements. The system is
fully protected from input noise and over-voltage.
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The Pason PVT system consists of two main units: the display unit and the junction box
(J Box). The J Box is provided so that field wiring connections can be made in a safe,
convenient location. The J Box also provides an excellent location for field personnel to
troubleshoot the system.
The display unit is the heart of the system, containing all the controls, switches, and
alarms. A 1” backlit Liquid Cryst al Dis play (LCD) is provided for each main function
monitored. A variety of information can be displayed about each function by using the
panel switches on the unit. The volume and flow sections monitor either gain/loss
readings or absolute values. The pump section monitors either strokes per minute or
total strokes for both pumps. The trip tank section monitors trip tank volume, individual
fill volume, or total accumulated fill volume.
An alarm is provided for both volume and flow gain/loss deviations. The alarms are fully
independent of each other and are adjustable. If one or both of the alarms are disabled,
a red warning light (LED) will flash to remind the operator to turn the alarm back on as
soon as possible. In addition to the volume and flow alarms, the trip tank system is
provided with both a high and low alarm to assist the operator in filling or draining the trip
tank.
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1 Specifications
1.1 Display Unit Specifications
Input Power Requirements
Voltage 110 VAC, 50/60 HZ
Current 1.5 Amps
Environmental Specifications
Ambient Temperature
Relative Humidity 100% (Outdoor Use)
Hazardous Area
Classification
Physical Specifications
Dimensions (W-H-D) 14¾” x 123/8” x 7¼”
Weight 35 lbs.
Mounting Pipe Bracket
Box Material 1/16” Stainless Steel
Face plate Material 1/8” Aluminum
Viewing Windows Material 5 mil Safety Glass
–40 to 45
Class 1, Div. 2 (CSA)
(Excluding Mounting Brack et)
(Reverse Silk-Screened)
°C
Technical Specifications
Displays 4 Digit, 1” LCD (Backlit)
Display Accuracy
Volume Resolution 0.1 m3
Pit Accuracy
Flow Resolution 1%
± ½” of Fluid Level
± ½” of Fluid Level
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Trip Resolution 0.01 m3
Pumps Resolution 1 Stroke/Minute
Chart Output
Chart Output Resolution 8 Bit (0.4%)
Functional Specifications
Displayed Functions Total Pit Volume
Main Pits Monitored Up To 8 Pits Plus Trip Tank
Volume Alarm Range 0.5 to 2.75 m3
0 to
± 20 mA (Programmable)
Volume Per Tank
Volume Gain/Loss
Return Flow Percent
Return Flow Gain/Loss
Trip Tank Volume
Individual Fill (Trip)
Accumulated Fill (Trip)
Strokes/Min. (Pump 1 & 2)
Total Strokes (Pump 1 & 2)
Flow Alarm Range 2.0 to 5.5%
Chart Recorder Output Volume, Flow and Trip (20 mA)
Alarm Horn 120 VAC Klaxon Type
1.2 J Box Specifications
Input Power Requirements
Input Voltage 14 VDC
Input Current 70 mA Typical
Environmental Specifications
Ambient Temperature
(Supplied Via Signal Cable)
(Limited to 100 mA)
–40 to 45
°C
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Relative Humidity 100% (Outdoor Use)
Max. Internal Temperature
Hazardous Area
Classification
Physical Specifications
Dimensions (W-H-D) 155/8” x 12¾” x 8”
Weight 13 lbs.
Mounting Lugs (2)
Box Material PolyGlass
Technical Specifications
Reference Voltage
(Red to Black)
Short Circuit Current
(Red to Black)
Ambient + 2
°C
Class 1, Div. 2 (CSA)
6.2 VDC
(All Tanks–Open or Closed Circuit)
12 mA (All Tanks)
Signal Input Impedance
(White)
Open Circuit Voltage
(Red To Black)
Short Circuit Current
(Red to Black)
Open Circuit Voltage
(Red To Black)
Short Circuit Current
(Red To Black)
Functional Specifications
Field Inputs Main Pits (8)
100k ohm (All Tanks)
12 volts (Flow)
50 mA (Flow)
8.2 VDC (Pumps 1 & 2)
8.2 mA (Pumps 1 & 2)
Trip Tank
Flow
Pumps (2)
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