Available with Field Replaceable Switches
1
Rev. 04-15
Simpson’s Model 8455 Line Loop tester detects line
shorts, opens and multiple ringers, DC voltages and loop
resistance.
It can measure DC voltage up to 100 volts and loop
resistance to 2 megohms.
A front panel “reverse polarity” switch allows changing
polarity positions quicker and easier than manually
switching test leads when making line checks.
This switch is eld replaceable, enabling your loop tester to
be operational at all times without costly shop repairs.
The compact durable construction of this tester ensures
continued accuracy even under the most rugged eld
conditions.
8455 & 8455A
Line LoopTester
Model No. 8455
• Field Replaceable Switches - Allows operator to get back to the job quickly with less downtime.
The replacement toggles or push buttons can be kept in the truck and replaced on site, keeping the
unit in service at all times.
• Designed for Telecom Applications - Accurately checks line shorts, opens and multiple ringers.
• Wide Measuring Range - Measures DC voltage 0-100V and resistance R x 1, R ÷ 10.
• Shorter Testing Time - Polarity toggle switch eliminates manually switching test leads when
conducting line checks.
• Rugged for Field Use - Durable, compact (5-1/2" x 2-3/8") construction makes it portable,
easy to store and rugged.
• Accurate, Finer Readings - 0-100 points scale calibration yields accurate readings.
Resistance
Model Standard Low Ohms
Range
Center Value 100K Ω 10K Ω 50 points 500 Ω
Accuracy
Open Circuit Voltage (nom) 45V 45V N/A 1.2V
Short Circuit Current (nom) 450 μA 4.5mA N/A 2.4mA
R x 1 R ÷ 10
2
°
of arc 2° of full scale 2° of arc
Points Low Ohms
8455 & 8455A
2
Rev. 04-15
Line LoopTester
Ordering Information
Model 8455 Line Loop Tester Catalog
Number
40010 40011
Field Rep. Switch Yes Field Rep. Switch Yes
Low Ohms No Low Ohms Yes
Accessories Included
Case Yes Case Yes
Leads Yes Leads Yes
Battery Pack Yes Battery Yes
Manual Yes Manual Yes
Optional Accessories (Recommended)
Case 00836 Case 00836
Leads 45001 Leads 45001
10 Pk. Replaceable Switches - Toggle 45025 10 Pk. Replaceable Switches - Toggle 45025
10 Pk. Replaceable Switches - Push Button 45026 10 Pk. Replaceable Switches - Push Button 45026
Model 8455A Line Loop Tester
(Low Ohms Version)
Catalog
Number
Specications
DC Voltage
Range 100V
Sensitivity Model 8455, 1K Ω per volt
Model 8455A, 3333 Ω per volt
Isolation 100V DC max. circuit to earth ground
Overload Protection 10mA/250V fuse on all ranges
Temperature Coefcient (57°F to 97°F): ±2% F.S. (VDC)
Power (1) Simpson 45V battery pack, Catalog number 00865
Physical Dimensions 5.5” (H) x 3.6” (W) x 2.4” (D), (14 x 9 x 6 cm)
Weight 1 lb. (0.5 Kg)
Specications subject to change without notice
Line LoopTester
3
Rev. 04-15
Field Replaceable Switches Save Time - Save Money
Simpson's FIELD REPLACEABLE SWITCHES - replace
broken switches in less time than it takes to complete a eld report
or repair paper work.
Simpson uses the best toggle switches, with pinned toggles for
longer life.
The pictorial steps to the left illustrate the simplicity of replacing a
toggle switch.
Complete detailed replacement instructions are provided in both
the 8455 and 8455A operator's manuals.
Remove the test leads and 4 screws located near
the meter face from the 8455A’s front cover.
8455 & 8455A
Detach the mounting nut from the defective toggle
switch.
Unplug the worn cut or broken switches and plug in
a new one!
Total time under 5 minutes.
Push-button style switches also available.
8455 & 8455A
4
Rev. 04-15
Line LoopTester
Model 8455A Low Ohms Version
Includes all the features of the 8455. Select the low ohms model if
measuring electrical resistance over short lines (for example, in city
and suburban locations).
Test Leads for 8455 and 8455A
Catalog Number 45001
Consists of one each, red and black, exible test leads, 6 ft. long with
Telco clips at one end and ring-tongue connectors at the other end for
connection to the Instrument’s screw terminals.
Protection for 8455 & 8455A
Catalog Number 00836
Simpson’s foam padded, nylon water repellent case, protects the 8455
or 8455A both in storage and during transport.
Use either the case handle or adjustable nylon strap for easy carrying.
The neck strap frees both hands for making measurements. The
case, made of nylon mesh with an extremely dense weave and water
repellent backing, safely protects unit from inclement conditions.
Foam padding on sides, top and bottom safeguards unit from damage.
A convenient pocket stores leads while they are attached to the
instrument.
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