fann 88C User manual

Model 88C Resistivity Meter
Instruction Manual
Manual No. 207980, Revision F
Instrument No. 207960
© 2017 Fann Instrument Company, Inc

Model 88C Resistivity Meter Instruction Manual
©2017 Fann Instrument Company
Houston, Texas, USA
All rights reserved. No part of this work covered by the copyright hereon may be reproduced or
copied in any form or by any means (graphic, electronic, or mechanical) without first receiving the
written permission of Fann Instrument Company, Houston, Texas, USA.
Printed in USA.
The information contained in this document includes concepts, methods, and apparatus which may be
covered by U.S. Patents. Fann Instrument Company reserves the right to make improvements in
design, construction, and appearance of our products without prior notice.
FANN®and the FANN logo are registered trademarks of Fann Instrument Company in the United
States and/or other countries. All other trademarks mentioned in the operating instructions are the
exclusive property of the respective manufacturers.
Contact Fann Instrument Company
Phone
1-281-871-4482
1- 800-347-0450
Fax
1-281-871-4358
Postal Address
Fann Instrument Company
P.O. Box 4350
Houston, Texas, 77210 USA
Shipping Address
Fann Instrument Company
14851 Milner Road, Gate 5
Houston, Texas, 77032, USA
Online
www.fann.com
[email protected]
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Model 88C Instruction Manual
Table of Contents
1 Introduction...............................................................................................................4
1.1 Document Conventions ....................................................................................4
2 Safety .......................................................................................................................6
2.1 Battery Safety...................................................................................................6
3 Features and Specifications......................................................................................7
4 Operation..................................................................................................................9
4.1 Fluid Samples...................................................................................................9
4.2 Semisolid Samples.........................................................................................10
5 Troubleshooting and Maintenance..........................................................................12
5.1 Calibration ......................................................................................................12
5.2 Battery Replacement......................................................................................12
5.3 Cleaning.........................................................................................................13
6 Parts List.................................................................................................................14
7 Warranty and Returns.............................................................................................15
7.1 Warranty.........................................................................................................15
7.2 Returns...........................................................................................................15
List of Figures
Figure 3-1 Resistivity Meter, Model 88C..........................................................................8
Figure 4-1 Resistivity Chart for NaCl Solutions..............................................................11
List of Tables
Table 3-1 Resistivity Meter, Model 88C Specifications....................................................7
Table 3-2 Range of Environmental Conditions ................................................................7
Table 6-1 Model 88 Resistivity Meter Included Parts....................................................14
Table 6-2 Optional Equipment.......................................................................................14
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Model 88C Instruction Manual
1 Introduction
The Model 88C Resistivity Meter measures the resistivity of fluids, slurries, and
semisolids according to API recommended practice. Field and laboratory personnel
rely on this instrument to evaluate formation characteristics from electric logs.
Resistivity is the ability of a material to resist conduction; conductivity is the
reciprocal of resistivity.
1.1 Document Conventions
The following icons are used as necessary in this instruction manual.
NOTE.Notes emphasize additional information that may be
useful to the reader.
CAUTION. Describes a situation or practice that requires operator
awareness or action in order to avoid undesirable consequences.
MANDATORY ACTION. Gives directions that, if not observed,
could result in loss of data or in damage to equipment.
WARNING! Describes an unsafe condition or practice that if not
corrected, could result in personal injury or threat to health.
ELECTRICITY WARNING! Alerts the operator that there is risk of
electric shock.
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Model 88C Instruction Manual
HOT SURFACE! Alerts the operator that there is a hot surface and
that there is risk of getting burned if the surface is touched.
EXPLOSION RISK! Alerts the operator that there is risk of
explosion.
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Model 88C Instruction Manual
2 Safety
Safe laboratory practices and procedures should be observed while operating and
maintaining the Model 88C.
2.1 Battery Safety
On nine volt batteries, the positive and negative terminals are on
the same end, next to each other. If these terminals touch
anything metal, such as steel wool, coins, or a paper clip, a short
circuit could occur, creating heat, sparks, a fire, or an explosion.
Nine volt batteries can explode if they are stored in a hot location,
charged improperly, or if the terminals contact metal, creating a
short circuit.
Some batteries contain toxic or corrosive material, which can leak
if the battery is damaged.
•Store unused 9-volt batteries in their original packaging, a sealed plastic container,
or securely cover both terminals to prevent short circuits.
•Do not charge rechargeable batteries before storing them.
•Store batteries at or below 70oF (21oC).
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Model 88C Instruction Manual
3 Features and Specifications
The Model 88C can measure resistivity in three ranges – 0.01 to 2, 0.1 to 20, and
1.0 to 200 ohm meters. The ohm-meter reading can be converted into parts per
million sodium chloride (or equivalent calcium chloride, potassium chloride or
other carbonate or hydroxyl salts) using the resistivity chart (Figure 4-1). This
instrument can be operated by its own batteries or by a battery eliminator (P/N
101710234).
The Model 88C has these features:
•Direct digital readout in ohm-meters
•Built-in temperature probe
•Low battery indicator
•Test Button for calibration
Table 3-1 Resistivity Meter, Model 88C Specifications
Category Specification
Meter Range 0.01 to 200 ohm-meters
Meter Dimensions
(Height x Width x Length) 2.8 x 5.1 x 8.3 inches
7.1 x 13 x 21 centimeters
Carrying Case Dimensions
(Height x Width x Length) 9 x 3.5 x 7.9 inches
22.9 x 8.9 x 20.1 centimeters
Weight 4 lb (1.8 kg)
Power Supply 4 x 9V alkaline batteries
Table 3-2 Range of Environmental Conditions
Maximum Altitude
6562 ft (2000 m)
Temperature Range
41oF to 104oF (5oC to 40oC)
Maximum Relative Humidity (RH)
80% RH at 87.8oF (31oC) or less
50% RH at 104
o
F (40
o
C)
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Model 88C Instruction Manual
Figure 3-1 Resistivity Meter, Model 88C
Sample Cell
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Model 88C Instruction Manual
4 Operation
The Model 88C Resistivity Meter can measure resistivity of fluid samples and
semisolid samples (e.g., filter cakes or mud solids). Procedures for both types of
samples are listed here.
The resistivity chart or nomograph (Figure 4-1) is used to determine the quantity of
sodium chloride (in combination with distilled water or other salt-free aqueous
medium) that is required to produce a solution with the same resistivity as the
sample. The concentration for carbonate salts, calcium salts, and hydroxyl salts can
be found in conductance tables for aqueous solutions.
4.1 Fluid Samples
This procedure explains how to measure resistivity of liquids, filtrates, and drilling
fluids.
1. Remove the Sample Cell from the Resistivity Meter and fill it with the test
sample. When filling the cell with filtrate, fill and discharge the sample several
times before the final filling.
Make sure there are no bubbles in the sample.
2. Reattach the sample cell onto the pins on the meter.
3. Insert the temperature probe in the wall in the sample cell, set the MODE
switch to TEMP and allow the temperature reading to stabilize. This will take
at least three minutes if meter and sample are not at room temperature.
4. Set the MODE switch to RES, read and record the resistivity in ohmmeters.
5. Remove the sample cell and clean it with distilled water. If necessary, use a
pipe cleaner and mild soap to clean the cell bore.
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Model 88C Instruction Manual
Do not use solvents to clean the cell.
6. Using the nomograph (Figure 4-1), convert the resistivity in ohm-meters to
concentration of chlorides.
4.2 Semisolid Samples
This procedure explains how to measure resistivity of semisolid samples, such as
filter cakes and mud solids.
1. Prepare samples of uniform moisture content.
2. Fill the slot on the outer surface of the cell completely with a semisolid sample.
3. Follow steps 2 through 6 from 4.1 Fluid Samples.
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Model 88C Instruction Manual
Figure 4-1 Resistivity Chart for NaCl Solutions
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Model 88C Instruction Manual
5 Troubleshooting and Maintenance
Calibration and regular maintenance procedures are described in this section. If
more extensive maintenance or service of the instrument is required, please contact
Fann Instrument Company.
5.1 Calibration
This procedure is a simple method for checking the instrument. A thorough
calibration requires a calibration kit.
A calibration kit (P/N 210179) is available as a separate
purchase. See the parts list for details.
1. Set the MODE knob to RESISTANCE.
2. Set the RANGE knob to 2.
3. Push and hold the TEST button.
4. Observe the reading. The reading should stabilize at 1.800 ± 0.040 ohm-meters.
If the reading is not correct, low batteries may be the cause. Replace the
batteries and repeat the calibration. If the reading is still not correct, then return
the instrument for recalibration.
5.2 Battery Replacement
When the battery is low, the digital display will show an arrow pointing to LOW
BATT. When the LOW BATT arrow appears, replace the complete set of four
9-volt batteries.
Lift the battery tray (back of the instrument) at the slot and pull the battery tray out.
When inserting new batteries, make sure the battery terminals are placed as shown
on the diagram in the tray.
If batteries are inserted incorrectly, they will become damaged.
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Model 88C Instruction Manual
A battery eliminator (P/N 101710234) is available as a separate
purchase. See the parts list for details.
5.3 Cleaning
Always clean the cell immediately after making a measurement.
Do not use solvents to clean the cell.
Avoid scratching the surface of the cell.
1. Purge the cell with distilled water until it is clean.
2. If additional cleaning is necessary, use a pipe cleaner and mild soap.
3. After extensive use, follow these steps to thoroughly clean the cell.
a. Soak the cell bore in cleaning solution (P/N 210181) for 2 to 3 hours.
b. Scrub it with a pipe cleaner.
c. Rinse with distilled water.
d. Dry the cell with a clean pipe cleaner.
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Model 88C Instruction Manual
6 Parts List
Table 6-1 Model 88 Resistivity Meter Included Parts
Part No.
Quantity
Description
201057
2
BATTERY HOLDER, 9 VOLT
203623
1
CARRYING CASE
205643
4
BATTERY 9 VOLT
206724
2
KNOB 3/4 DIA X 5/8 HEIGHT w/ 2 SET SCREWS
207262
1
SAMPLE CELL
207263
2
PIN CONTACT MODEL 88C RESISTIVITY METER
207962
1
OVERLAY 88C RESISTIVITY METER
208571
1
JACK POWER PANEL MOUNT
208806
1
CIRCUIT BOARD ASSEMBLY AMPLIFIER 88
208807
1
BOOT SWITCH
204156
1
RED RUBBER BULB, 2ML CAPACITY
Table 6-2 Optional Equipment
Part No.
Description
210441
PIPE CLEANERS, 20/PKG
210179
RESISTIVITY CALIBRATION KIT*
210181
CLEANING SOLUTION, 4 OZ.
210182
STANDARD RESISTIVITY SOLUTION, 4 0Z.
101710234
BATTERY ELIMINATOR, 115/230V
*Calibration Kit includes pipe cleaners, cleaning solution, and standard resistance solution.
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Model 88C Instruction Manual
7 Warranty and Returns
7.1 Warranty
Fann Instrument Company warrants only title to the equipment, products and
materials supplied and that the same are free from defects in workmanship and
materials for one year from date of delivery. THERE ARE NO WARRANTIES,
EXPRESS OR IMPLIED OF MERCHANTABILITY, FITNESS OR
OTHERWISE BEYOND THOSE STATED IN THE IMMEDIATELY
PRECEDING SENTENCE. Fann's sole liability and Customer's exclusive remedy
in any cause of action (whether in contract, tort, breach of warranty or otherwise)
arising out of the sale, lease or use of any equipment, products or materials is
expressly limited to the replacement of such on their return to Fann or, at Fann's
option, to the allowance to Customer of credit for the cost of such items. In no
event shall Fann be liable for special, incidental, indirect, consequential or punitive
damages. Notwithstanding any specification or description in its catalogs,
literature or brochures of materials used in the manufacture of its products, Fann
reserves the right to substitute other materials without notice. Fann does not
warrant in any way equipment, products, and material not manufactured by Fann,
and such will be sold only with the warranties, if any, that are given by the
manufacturer thereof. Fann will only pass through to Customer the warranty
granted to it by the manufacturer of such items.
7.2 Returns
For your protection, items being returned must be carefully packed to prevent
damage in shipment and insured against possible damage or loss. Fann will not be
responsible for damage resulting from careless or insufficient packing.
Before returning items for any reason, authorization must be obtained from Fann
Instrument Company. When applying for authorization, please include information
regarding the reason the items are to be returned.
Our correspondence address:
Fann Instrument Company
P.O. Box 4350
Houston, Texas USA 77210
Telephone: [phone]
Toll Free: 800-347-0450
FAX: [phone]
Email [e-mail]
Our shipping address:
Fann Instrument Company
14851 Milner Road, Gate 5
Houston, Texas USA 77032
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