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Summary of Contents for Simpson 8455A
- Page 1 Simpson 8455 V3 And 8455A Line Loop Testers OPERATOR’S MANUAL Model 8455 V3 Model 8455A 1.800.561.8187 information@itm.com www. .com...
- Page 2 SIMPSON ELECTRIC COMPANY neither assumes nor autho- rizes any other persons to assume for it any other liability in connection with the sales of its products.
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Page 3: Table Of Contents
Contents 1. INTRODUCTION ................5 2. ITEMS AND ACCESSORIES ............5 3. TECHNICAL DATA ................6 4. UNPACKING AND INSPECTION ............6 5. ELECTRICAL CHECKOUT ..............6 6. WARRANTY ..................7 7. SHIPPING ..................7 8. CONTROLS, CONNECTORS AND INDICATOR ......... 7 9. -
Page 4: Introduction
±2% of full scale and ±2° of scale arc are both represented by ±1 scale division of the POINTS scale anywhere on the scale. The 8455A differs from the 8455 V3 in that it substitutes a 0-10K Ÿ range for the 0- 200KŸ range of the 8455 V3. The 2M Ÿ range remains for points measurements, but does not have a separate meter dial scale. -
Page 5: Technical Data
TECHNICAL DATA Table 3-1. Technical Data DC Volts: Range: 0-100V (0-100 POINTS) Sensitivity: 1000V /V (8455 V3), 3333V /V (8455A) Accuracy: ±2% of full scale (FS). Resistance: ± ° 2 R4 0 ± ° 2 ± ° 2 Ballistic Tests: (Capacitive kick in POINTS) (Typ) Capacity (μF) -
Page 6: Warranty
(less than 100V DC) source to assure that the voltage (POINTS) range is functioning correctly. WARRANTY The Simpson Electric Company warranty is printed on the inside front cover of this manual. Read it carefully before requesting any warranty repairs. NOTE: For all assistance, contact the nearest Simpson Authorized Service Cen- ter. -
Page 7: Safety Precautions
Battery Adjustment: Control to enable correction for battery condition when calibrating resistance measuring ranges (zero kV adjustment). NOTE: The Model 8455A ohms range is internally calibrated and is not affected by the battery adjustment control. Indicating Meter: Displays measured values of resistance (MV -KV ), (8455 V3) or (kV -V ) 8455A, POINTS (ballistic tests) or DC voltage (100 POINTS = 100V). -
Page 8: Operation
The 8455 should only be used by personnel who are qualified to recognize shock hazards and are trained in the safety precautions required to avoid possible injury. Do not connect any terminal of this Instrument to a circuit point at which a voltage exceeding 100 volts DC may exist with respect to earth ground. -
Page 9: R4 10 Push-Button (8455 V3)
Set the Instrument to mea- STATION CENTRAL OFFICE sure resistance (ON/OFF 8455 switch to ON; “Press for Ohms” depressed, 8455A). GROUND Short test clips together and adjust BATTERY ADJUST- MENT control for meter Figure11- 1. Test for Ground reading of full scale (100 POINTS). -
Page 10: Test For Crossed Conductors
(ON/OFF switch CROSS CENTRAL STATION to ON; “Press for Ohms” de- OFFICE LINE # 2 pressed, 8455A). Short test clips together and 8455 adjust BATTERY ADJUST- MENT control for meter reading of full scale (100 POINTS). Connect test clips to combi- Figure 13-1. -
Page 11: Test For Split
Strap short across line #1 at the far end. Set the Instrument to measure resistance (ON/OFF switch to ON; “Press for Ohms” depressed, 8455A). Connect one test clip to strapped connection of line #1. Connect the other test clip first to one conductor of line #2 and then the other conductor. -
Page 12: Identify Split Conductor Of Line #1
CENTRAL OFFICE measure resistance 8455 (ON/OFF switch to ON; “Press for Ohms” de- pressed, 8455A). Short test clips together and adjust BATTERY Figure 17-1. Calculating Distance to Fault ADJUSTMENT control for meter reading of full scale (100 POINTS). Connect one test clip to each conductor. The resistance value indicated is the 1.800.561.8187... -
Page 13: Operator Maintenance
loop resistance (the two conductors in series). The resistance to the fault is the loop resistance divided by 2. To calculate the distance to the fault in feet, refer to the table below for feet per ohm of resis- tance. Table 5. -
Page 14: Access To Battery Or Switches
“+” terminal. A meter indication of at least 35 POINTS (35 V) is re- quired for resistance measurements. A new battery will indicate about 48 POINTS (48 V). On the 8455A, the battery must be removed before testing with the volts function. Replace the panel. Place cushioning pad between circuit board and battery, dressing battery leads so they will not be pinched between the panel and case when panel screws are tightened. -
Page 15: Care
18.5 Care When the Instrument is not in use, set the ON/OFF switch to OFF to prevent battery discharge if the test lead clips should accidentally be shorted to- gether. If the Instrument is to be stored for more than one month, remove the battery to avoid corrosion damage.
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