Extech Instruments 475040 User manual
USER GUIDE
Digital Force Gauge
Models 475040 and 475044
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Introduction
Thank you for selecting the Extech Digital Force Gauge. This professional meter, with proper care, will
provide years of safe reliable service. This device measures Tension or Compression (Push or Pull) to
5kg (475040) or 20kg (475044). The reversible display indicates readings in grams, ounces, or
Newtons. This meter offers Peak Hold and a Zero function. Please visit the Extech Instruments
website to check for the latest version of this User Guide.
Meter Description
FRONT DESCRIPTION
1. Universal sensing head
2. LCD Display
3. Fast response indicator
4. Unit select switch
5. OFF/ON/PEAK HOLD button
6. Battery compartment cover (on rear)
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METER BACK AND MOUNTING SCREW DESCRIPTION
1. Mounting screws:
Hex head (#4 Allen wrench) with a thread size of metric
(ISO) M5 x 0.8. The spacing between screws is 60.0 mm
(2.36”)
2. Battery compartment access screws
3. Battery compartment
Operation
Preparation for Measurement
1. The 475044 or 474040 automatically determine TENSION or COMPRESSION (Push or
Pull) force during use. Compression displays as a negative value and Tension displays as a
positive value.
2. Select units of measure (grams/kilograms, ounces/pounds, or Newtons) via the units select
button.
3. Attach the desired adapter (tension – hook; compression.- flat, cone or chisel head) to the
Universal Sensing Head.
4. Select FAST or SLOW response. The FAST setting permits the capture of fast
measurement changes and the SLOW setting provides an averaged reading display.
5. Zero the display before each measurement via the Zero button.
Note: The sensing head with adapter must be in line with the object being measured. Avoid
rotating the sensing head. Refer to the figure below.
Figure 1 Correct and Incorrect Angles of Measurement
Acceptable Not Acceptable
60mm (2.36”)
1
2
3
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Normal Measurement Mode
1. Slide the POWER switch to the ON position.
2. Zero the meter before each measurement.
3. Touch the adapter to the object being measured in a straight line. Refer to Fig.1.
4. Begin measurement by applying force (Push or Pull). Read the LCD display.
5. After completing the measurement, the display will indicate "0.00" if the position and angle of
the Force Gauge have not changed.
6. If the position or angle of the Force Gauge changes during a measurement, the display may
show one of the following:
a) The display over-ranges because the initial force of the transducer decreases due to a
change in the position or angle of the Gauge after measurement.
b) The display indicates any value such as "12", "25", etc. This occurs because the initial
force of the transducer increases due to a change in the position or angle of the Gauge
after measurement.
Note: Be sure to press "ZERO" before taking any new measurements.
Mounting
For best results, mount the Digital Force Gauge to a test stand. Mounting holes are provided on the
rear of the meter.
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Maintenance
Battery Replacement
The low battery indication appears as a "LO" on the display when battery voltage is less than 6.8V. To
replace the battery:
1. Remove the two screws from the battery compartment cover.
2. Lift off the battery cover.
3. Replace with 6x 1.5V AA (UM-3) batteries. Observe polarity carefully.
4. Replace compartment cover and screws.
All EU users are legally bound by the Battery Ordinance to return all used batteries to
community collection points or wherever batteries / accumulators are sold!
Disposal in household trash or refuse is prohibited!
Disposal: Follow the valid legal stipulations in respect of the disposal of the device at the
end of its lifecycle
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Specifications
475044 475040
Range 44 lbs, 20kg,196 Newtons 176oz, 5000g, 49 Newtons
Accuracy (23oC) ±(0.5%rdg + 2 digits) ± (0.4%rdg + 1 digit)
Resolution 0.01lbs, 0.01kg, 0.05 Newtons 0.05oz, 1g, 0.01 Newtons
Overload Capacity 30kg 10kg
Circuit Custom LSI microprocessor circuit
Zero adjust Button for Peak Hold and normal display zero
Display 5 digits, 16 mm (0.63”) LCD display
Update Rate Fast mode 0.2 secs; Slow mode 0.6 secs.
Over-range Indicator Displays “--------“
Zero Control Maximum capacity
Full Scale Deflection:5000g Approx. 2mm max.
Full Scale Deflection:20kg Approx. 0.4mm max.
Transducer type Load cell
Peak Hold Freezes Max reading on display
Operating Temperature 0 °C to 50 °C (32 °F to 122 °F).
Operating RH Max. 80% RH.
Power Supply 6x 1.5V AA (UM-3) size battery or DC 9V adapter (not included)
Weight 480g / 1.1 lbs.
Size 215 x 90 x 45 mm (8.5 x 3.5 x 1.8”)
Mounting Holes Located on rear of gauge
Accessories Tension adapter (hook), compression adapters (flat, cone, and chisel),
5" extension rod, 6 x 1.5V AA batteries, case
Copyright ©2014 FLIR Systems, Inc.
All rights reserved including the right of reproduction in whole or in part in any form
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