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ACL 880 Operation Manual Rev. 08/22/19 MKB
ACL 880 MEGOHMMETER
OPERATION MANUAL
Meter is warranted for one year from the date of purchase on parts and labor.
Calibration is recommended every twelve months.
NOTE: THIS MANUAL IS NOT TO BE
SEPARATED FROM METER!
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ACL 880 Operation Manual Rev. 08/22/19 MKB
ACL 880 Megohmmeter
The ACL 880 Megohmmeter kit measures surface resistivity, resistance, temperature and
humidity. It is designed to test conductive, dissipative, and insulative surfaces for electrical
resistivity/resistance according to EOS/ESD, CECC, ANSI, ASTM and UL test procedures.
DEAL FOR TESTING IN ACCORDANCE TO
I
ANSI/ESD STM2.1 Garments-Resistive Characterization
ANSI/ESD STM4.1 Worksurfaces - Resistance Measurements
ANSI/ESD STM7.1 Floor Materials – Resistive Characterization of Materials
ANSI/ESD STM9.1 Footwear – Resistive Characterization
ANSI/ESD SP9.2 Footwear – Foot Grounders Resistive Characterization
ANSI/ESD STM97.1 Footwear/Flooring System – Resistance Measurement in Combination
with a Person
ANSI/ESD STM12.1 Seating – Resistive Measurement
ESD TR53 Compliance Verification of ESD Protective Equipment and Materials
ACL 880 MEGOHMMETER INCLUDES:
Tester
Two 5-lb probes
One shielded split cable 80” long (banana to banana)
One shielded ground cable 80” long (banana to banana)
9-volt battery
Foam-lined carrying case
Certificate of calibration
TEST VOLTAGE AND LIMITS
• <10 Volts Variable are applied from 1.0x10e3 to 9.9x10e3 ohms and provides audible continuity
indication below 1.6 ohms.
• 10 Volts ± <0.5V (±<5% Constant Voltage, i.e., Under Load) applied from 1.0x10e4 to
.99x10e5 ohms.
• 100 Volts ± <5V (±<5% Constant Voltage, i.e., Under Load) applied from 1.0x10e6 to
1.0x10e12 ohms.
:
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ACL 880 Operation Manual Rev. 08/22/19 MKB
INTRODUCTION
The ACL 880 Megohmmeter is a dependable and easy-to-use audit kit for conductive
and dissipative surfaces. This meter is designed to be used in all facets of material
production including engineering, maintenance, quality control, incoming inspection,
manufacturing, research, or sales departments for the testing of anti-static mats, floor
finishes, paints, wrist straps, smocks, footwear, bags and containers.
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ACL 880 Operation Manual Rev. 08/22/19 MKB
Test Lead Connections:
White = Shield
Black = Current Sensing
Red = Test Voltage
PREPERATION
1. Battery
a. Turn main power to off when installing 9v battery.
b. Unscrew battery compartment with Phillips #1 screwdriver.
c. Replace battery and reattach cover.
2. Install test leads or special fixtures according to colored sequence.
Leads are connected to the Positive (+) and Negative (-) receptacles for resistance
instrument measurements. The black sensing lead incorporates shielding; the shield is
connected to the instrument via the white banana plug and receptacle. Receptacles are
separated by ¾ inch spacing to accommodate dual banana plug connectors. These
connectors are used for microprobes resistance measurement fixtures.
Leads supplied with the ACL 880 are specially designed for this instrument. They have
superior outer insulation and a high number of stranded conductors to minimize
measurement errors.
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ACL 880 Operation Manual Rev. 08/22/19 MKB
Be aware that other leads may not provide similar performance and will require
recalibration of the Null point to improve measurement accuracy.
Always use supplied leads for best performance. Lead quality and length affect
instrument accuracy. This is due to several factors such as insulation resistance, lead
inductance and capacitance, as well as transmitted “noise” in the environment. To
minimize the effect of noise and transmitted energy on measurement accuracy, the
black sensing lead is shielded. Long 200 cm leads are supplied for auditing purposes
where lead length is physically necessary. Long leads will allow the instrument to
perform within its targeted performance.
RECOMMENDED USAGE
ACL 880 instruments and fixtures shall be operated at 65 – 90° Fahrenheit (18 – 32° Celsius), 10
– 60 % Relative Humidity. ACL 880 recommends making measurements using its instruments
and fixtures in an environment of 72 – 76° Fahrenheit (22 – 24° Celsius), 25 – 35% Relative
Humidity.
MODES OF OPERATION
1. Install leads and slide main power switch to ON. Wait for “GO A” to appear in display.
AUTO mode (GO A) is the default operation mode. To switch to MANUAL mode (GO C),
press the MODE pad and TEST pad simultaneously.
2. When using AUTO mode (GO A), the resistance range, test voltage and electrification
period (EP) is automatically adjusted according to standard measuring protocol. See
below for more information regarding EP. MANUAL MODE can be selected if a
measurement is to be taken at a specific test voltage.
a. To start measurement in GO A, press & release TEST pad. Measurement
sequence is conducted automatically and ends when green HOLD LED
illuminates. Yellow LED lights correspond to the voltage applied.
b. Final measurement is displayed for 10 seconds then instrument resets for the
next measurement.
c. Use the MODE button to interrupt or clear measurement.
d. Press TEST to restart the measurement.
3. When using CONTINUOUS mode (GO C), the resistance range and test voltage are
automatically adjusted according to standard measuring protocol. , The electrification
period (EP) is disabled. See below regarding more information on EP. MANUAL MODE
can be selected if a measurement is to be taken at a specific test voltage.
a. To switch from GO A to GO C, press MODE pad and TEST pad simultaneously.
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ACL 880 Operation Manual Rev. 08/22/19 MKB
b. To start measurement in GO C, press & release TEST pad. Measurement
sequence is conducted automatically and ends only when MODE pad is
depressed and stops measurement. Green HOLD LED will illuminates. Yellow
LED lights correspond to the voltage applied.
c. Final measurement is displayed for 10 seconds then instrument resets for the
next measurement.
d. Use the MODE button to interrupt or clear measurement.
e. Press TEST to restart the measurement.
4. When using MANUALLY to select a specific test voltage, the meter can be used in either
AUTO or CONTINUOUS modes by pressing the MODE pad before starting the
measurement.
a. Pressing the MODE pad will sequentially choose desired test voltage. Choose
desired test voltage by corresponding illuminated LED.
From Auto, press once for <10v. The test voltage is manually set to vary
from approximately 1 mv to less than 10 volts, depending on the
resistance being measured.
From Auto, press twice for 10v. Measurements will be made at a
constant test voltage of 10 volts ± <0.5 volts.
From Auto, press three times for 100v. Measurements will be made at a
constant voltage of 100 volts ± < 2 volts.
From Auto, press four times to return to AUTO mode.
b. Press and release TEST pad to make measurement.
c. Record the measurement within 10 seconds following the illumination of the
green HOLD LED.
d. Resistance measurement ranges in MANUAL MODE are as follows:
@<10 Volts (Variable): 1.0E3 to 1.0E9 Ohms
@10 Volts (Constant): 1.0E4 to 1.0E10 Ohms
@100 Volts (Constant): 1.0E6 to 1.0E12 Ohms
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ACL 880 Operation Manual Rev. 08/22/19 MKB
ACL 880 in Auto Default
Operation Mode
ACL 880 in Continuous
Operation Mode
5. The MODE button performs four useful functions:
a. Select mode of operation from AUTO (Go A) to Continuous (GO C) by pressing
MODE pad and TEST pad simultaneously.
b. Select manual test voltage for AUTO, or CONTINUOUS mode (see “Manual” section
above).
c. Bypass the automatic HOLD function and override displayed data by resetting the
instrument for the next measurement. The existing measurement in the display will
be discarded.
d. Initiate CAL? function. Calibration function is only to be used by qualified ACL
Staticide® trained technicians during calibration. Exit out of CAL? and do not try to
adjust.
ELECTRIFICATION PERIOD
Electrification Period (EP) is the time required for an instrument to make a measurement from
zero (0) within 5% of 1.0x10e12 ohms at 100 volts, plus 5 seconds. The EP is used for resistance
measurements equal to, or greater than 1.0x10e6 ohms. The 880 was designed to incorporate
variable EP to allow fastest possible, accurate measurements. Typical EP up to less than
1.0x10e9 ohms is typically less than 8.0 seconds. However, measurement conditions in the
factory environment vary considerably. To compensate for variables in materials and conditions,
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ACL 880 Operation Manual Rev. 08/22/19 MKB
the 880 makes many measurements each second and evaluates their consistency and stability. If
necessary the 880 will automatically extend the measurement time (EP) to insure an accurate
representation of the material under test.
The ACL 880 measurement process is quite fast and once a measurement is stable in the LCD,
the operator may elect to use the stable displayed measurement. In this case the EP is manually
determined by the operator. This is an efficient operating procedure for determining if the
measurement is generally within the required range for the object being audited. In this case,
the operator usually observes and confirms measurement stability, which results in faster audit
measurements. However, if the measurement is of a critical nature, or being used for material
qualification purposes, the full EP for that measurement should be employed, i.e., when the
measurement is completed and displayed, and the Green LED comes ON as described below. If
the operator desires the EP to be determined by the instrument in AUTO/GO A mode, the
Green Hold LED illuminates when the appropriate measurement period for each measurement
is reached. It takes into account the material variables seen during the measurement and
adjusts the EP for optimal measurement accuracy.
Typical EP’s for the ACL 880 instrument are:
1.0E3 to 1.0E9 ohms: Typically 2 to 8 seconds (Range Average 6.0 seconds)
1.0E09 to 1.0E11 ohms: 7 to 10 seconds
>1.0E11 to 1.0E12 ohms: 10 to 25 seconds
These values are variable and based on the stability of the materials being measured, as well as
the environmental conditions. For example, while the default EP for the ACL 880 instrument is
7.5 seconds, EP automatically adjusts to enhance measurement accuracy.
USER ADJUSTMENTS & MAINTENANCE
The primary user adjustments are limited and have been previously described in this manual,
i.e., the Null adjustment to compensate for test lead resistance. There is no reason for the
operator or unauthorized personnel to break the warranty seal and open the unit. The
instrument’s circuits and mechanical connections have been precisely installed and the
instrument tested. Annual calibration includes measurement of test voltage under load and a
series of functional resistance test measurements. A qualified calibration laboratory should
make these measurements and adjustments if necessary.
WARRANTY INFORMTION
Limited Warranty & Limitation of Liability: Each ACL 880 product is warranted to be free from
defects in material and workmanship under normal use and service. The warranty period is one
(1) year and begins on the date of shipment. This warranty extends only to the original buyer or
end-user customer and does not apply to fuses, disposable batteries or to any product which
ACL’S opinion, has been misused, altered, neglected or damaged by accident or abnormal
conditions of operation or handling. ACL Staticide warrants that software will operate
substantially in accordance with its functional specifications for 90 days and that it has been
properly recorded on non-defective media. ACL Staticide does not warrant that software will be
error free or operate without interruption. ACL Staticide reserves the right to invoice Buyer for
importation costs of repair/replacement parts when product purchased in one country is
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ACL 880 Operation Manual Rev. 08/22/19 MKB
submitted for repair in another country. ACL warranty obligation is limited, at ACL’s option, to
refund of the purchase price, free of charge repair, or replacement of a defective product which
is returned to ACL Staticide within the warranty period. This warranty does not apply to routine
calibration of the instrument. To obtain warranty service, contact ACL Staticide for a Return
Merchandise Authorization (RMA) with a description of the difficulty. Postage and insurance
prepaid (FOB Destination) is the responsibility of the end-user. ACL Staticide assumes no risk for
damage in transit. Following warranty repair, the product will be returned to Buyer,
transportation prepaid (FOB Destination). If ACL Staticide determines that the failure was
caused by misuse, alteration, accident or abnormal condition of operation or handling, ACL
Staticide will provide an estimate of repair costs and obtain authorization on before
commencing the work. Following repair, the product will be returned to the Buyer
transportation prepaid and the Buyer will be billed for the repair and return transportation
charges (FOB Shipping Point).
THIS WARRANTY IS BUYER’S SOLE AND EXCLUSIVE REMEDY AND IS IN LIEU OF ALL
OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY
IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
ACL Staticide SHALL NOT BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR
CONSEQUENTIAL DAMAGES OR LOSSES, INCLUDING LOSS OF DATA, WHETHER ARISING
FROM BREACH OF WARRANTY OR BASED ON CONTRACT, TORT, RELIANCE OR ANY
OTHER THEORY.
OUT OF WARRANTY REPAIRS
ACL Staticide expressly warrants that for a period of 90 Days from the date of repair, by
ACL Staticide, instruments and products will be free of defects in material (parts) and
workmanship (labor). If ACL Staticide receives notice of such defect during the warranty
period, ACL Staticide will replace or repair at its expense such parts which it determines
to be defective. Any defective part must be returned to ACL Staticide postage prepaid
with proof of purchase date. This warranty does not apply to routine calibration of the
instrument.
Warranty Exclusions - THE FOREGOING EXPRESS WARRANTY IS IN LIEU OF ALL OTHER
WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY IMPLIED
WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. ACL
Staticide SHALL NOT BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR
CONSEQUENTIAL DAMAGES OR LOSSES, INCLUDING LOSS OF DATA, WHETHER ARISING
FROM BREACH OF WARRANTY OR BASED ON CONTRACT, TORT, RELIANCE OR ANY
OTHER THEORY.
The express warranty does not apply to fuses, disposable batteries or to any product
which, in ACL’S opinion, has been misused, altered, neglected or damaged by accident
or abnormal conditions of operation or handling.
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LIMIT OF LIABILITY
In no event will ACL Staticide or any authorized reseller be responsible or liable for special,
incidental, or consequential losses or damages, under any legal theory including but not limited
to contract, negligence, or strict liability. Fulfillment by ACL, Inc. of its express warranty
obligations described above will be Buyer’s exclusive remedy and will be ACL, Inc. and
authorized reseller’s limit of liability for any breach of warranty or otherwise.
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