TRIPLETT 2000 Series Type 3 Railroad Test Sets Instruction Manual Model 2000 Model 2001 Model 2002 Model 2003 84-873 7/07
SAFETY RULES Warning This Tester has been designed with your safety in mind. However, no design can completely protect against incorrect use. Electrical circuits can be dangerous and/or lethal when lack of caution or poor safety practices are used. Read the Manual Read this Instruction Manual carefully and completely. Voltages and currents within the capability of this test equipment can be hazardous. Follow the instructions in this manual for every measurement.
Don't Touch Don't touch exposed wiring, connections, or other "live" parts of an electrical circuit. If in doubt, check the circuit first for voltage before touching it. Turn off the power to a circuit before connecting test probes to it. Be sure there is no voltage present before you touch the circuit. Do not use cracked or broken test leads. High Voltage Is Dangerous Always start with the power off. Be sure there is no voltage present before making connections to the circuit.
TABLE OF CONTENTS SAFETY RULES 2 1.0 INTRODUCTION 6 2.0 PRODUCT FEATURES 8 2.1 Code Measurements 8 2.2 The Cab Filters 10 2.3 Auto-Polarity 10 2.4 Power Supply Features 10 3.0 PREPARATION FOR USE 12 3.3 Meter Mechanical Zero 13 3.4 Visual Inspection of the Test Set 14 3.5 Visual Inspection of the Test Leads 14 3.6 Battery and Fuse Test 15 3.
4.0 GENERAL OPERATION 20 5.0 OPERATION 22 5.1 Measuring AC and DC Voltage 22 5.2 Measuring DC milliAmps 24 5.3 Measuring DC and AC Amps 26 5.4 Measuring Resistance 28 5.5 Measuring Dry Contacts 32 5.6 Measuring DC Pulse Code Signals 33 6.0 SPECIFICATIONS 34 6.1 Electrical Specifications 34 6.2 Physical Specifications 43 7.0 ACCESSORIES, PARTS, AND SERVICE 44 8.
1.0 INTRODUCTION 1.1 Package Contents The standard shipping package contains the following items: Test Set Test Leads This Instruction Manual Carrying Case with Strap Spare Fuses Two, 9V Alkaline Batteries One, D-cell Alkaline Battery 1.2 Product Description The Model 2000 Series of Railroad Test Sets are specialized VOM's designed for measuring the signal parameters of railroad coding equipment.
1.2.2 Measurement of Code Parameters The measurement of code parameters has been made simple and accurate. No longer is it necessary to count pointer swings to measure code rate. On time can be measured on live signals as well as relay contacts. Peak levels can be determined quickly and automatically. Adjustment to the code equipment peak level can also be made without constantly readjusting the Test Set. 1.2.
2.0 PRODUCT FEATURES 2.1 Code Measurements Code parameters may be directly measured with the Test Set. These code measurements are active in any AC or DC voltage or current range, as well as the Dry Contact function. These functions are selected by placing the Code Function Switch in the desired position. The Pointer will momentarily return to zero and then indicate the appropriate reading.
2.1.2 Peak Follow This function is similar to Peak Hold, except the peak measurement will follow the peak level automatically, even if it is decreasing. This permits easier adjustment of peak levels. No averaging is performed, so if the peak level is varying, the Pointer will follow it. WARNING: The 2000 Series Type 3 will continue to read out the value of the last captured measurement, even after the signal has been removed.
2.2 The Cab Filter If the Test Set has Cab Filters, then all AC functions may select one frequency to be measured. This is invaluable when multiple cab signals are being sent, as it negates the need to turn off one of the cab signals to measure the other one. The Signal Select Switch is simply placed in the position indicating the frequency to be measured. All functions behave the same, except that only the signal of interest is measured. 2.3 Autopolarity 2.3.
2.4.2 Battery Monitor To prevent operation of the Test Set with weak batteries, a battery test is performed every time the Range Switch is changed. If the batteries are low, the Pointer will deflect down scale into the Sleep Zone. It will not respond to any input making measurements impossible. This feature prevents low batteries from providing false readings if they fall below a voltage at which the internal circuitry is designed to operate reliably.
3.0 PREPARATION FOR USE 3.1 Before using the Test Set, familiarize yourself with the instrument and this manual. READ AND REVIEW THIS MANUAL FREQUENTLY. 3.2 Each time the Test Set is used, check, and if necessary, correct the mechanical zero of the meter. Refer to Section 3.3. Inspect the Test Set for mechanical defects as described in Section 3.4. Also, inspect the test leads as described in Section 3.5. Finally, perform the Battery and Fuse Test as described in Section 3.6.
3.3 Meter Mechanical Zero 3.3.1 Place the Test Set on its back on a flat, horizontal surface. Set the Range Switch to the OFF position. 3.3.2 Examine the position of the Pointer on the Dial. If it is exactly on the Zero Mark, then the meter is mechanically zeroed and no adjustment is necessary. 3.3.3 If the Pointer is not exactly aligned with the Zero Mark, then the mechanical zero of the meter needs adjustment. This is done by using a small, flat blade screwdriver to adjust the Zero Adjust Screw.
3.4 Visual Inspection of the Test Set Before use, inspect the Test Set for any conditions which would make it unsafe. Check for missing or loose parts ( knobs, screws, or insulators ). Check also for damage, such as cracks, chips and burn marks. Make certain that the Test Set is free from oils, grease, dirt and excessive moisture. IF ANY OF THESE CONDITIONS ARE FOUND, DO NOT USE THE TEST SET. 3.5 Visual inspection of the Test Leads Before use, inspect the test leads for worn or cut insulation.
3.6 Battery and Fuse Test Before using the Test Set, and frequently during use, the batteries and fuses in the Test Set should be tested. Refer to Section 3.7 for instructions on installing and/or replacing the batteries and fuses if necessary. 3.6.1 9V Battery Test Place the Test Set Range Switch in the OFF position. Depress and hold the Push For Ohms Switch. The Pointer will deflect upscale and the red NEG Indicator will light.
3.6.2.1 VOM Fuse Test Place the Test Set Range Switch in the DRY CONTACT position. Place the Code Function switch in the NORM position. Connect the test leads to the instrument. The red lead is attached to the VOM Jack and the black lead to the COM Jack. Short the leads, and the Pointer must deflect to full scale. If it fails to do so, fuse F201 (1A/ 250V 8AG) must be replaced. (Paragraph 3.7.3) Replace this fuse if necessary, then repeat this test. Proceed to the 1.5 AMP Fuse Test (Paragraph 3.6.2.
3.6.3 D-cell Battery Test Place the Test Set Range Switch in the Rx1 position. Short the test leads together (they must be in the VOM and COM jacks). Depress the Push For Ohms Switch and, using the Ohms Adjust Control, attempt to set the Pointer to full scale deflection. If this is possible, then the D-cell battery is good. If the Pointer cannot be set to full scale, then the D-cell battery must be replaced. Replace this battery if necessary, then repeat this test.
3.7 Battery and Fuse Replacement 3.7.1 Case Back Removal 3.7.1.1 Disconnect any test leads connected to the Test Set and place the Range Switch in the OFF position. 3.7.1.2 Remove the case back by turning the large thumb screw in the center of the case back counter clockwise. 3.7.2 Battery Replacement 3.7.2.1 Remove the D-cell and two 9V alkaline batteries under the white insulator if they are installed. 3.7.2.2 Install fresh batteries in the clips provided.
3.7.3 Fuse Replacement 3.7.3.1 Locate the two fuses on the Input Scaling Board (BD200). 3.7.3.2 Using a small, flat blade screwdriver, gently lift the installed fuse from its clips. Be careful so as not to bend the fuse clips. 3.7.3.3 Install a new fuse of the proper type. See Section 7.4 for the correct type. Be certain that the fuse is securely seated in the fuse clips. 3.7.4 Case Back Installation Re-install the case back being careful not to pinch any wires. Tighten the thumb screw finger tight.
4.0 GENERAL OPERATION 4.1 This section describes general operation of the Test Set. When making measurements of any type, refer to this section. THE MODEL 2000 SERIES RAILROAD TEST SETS ARE INTENDED FOR USE ONLY BY PERSONNEL TRAINED IN THE PROPER SAFETY PROCEDURES AND WHO CAN RECOGNIZE SHOCK AND SAFETY HAZARDS. Always prepare the Test Set for use by reading and following the Preparation for Use section of this manual. (Section 3.0) 4.
4.2.3 While holding the insulated boot covering the alligator clip, touch the alligator clips to the circuit being tested. If no voltage is present, connect the alligator clips to the points to be measured. If a voltage is found, check the equipment to make certain that all power is off and all capacitors are discharged. 4.2.4 Turn the equipment or voltage source on and take the required reading. DO NOT HANDLE OR TOUCH THE TEST SET, TEST LEADS, OR ALLIGATOR CLIPS WHILE THE EQUIPMENT IS TURNED ON. 4.2.
5.0 OPERATION 5.1 Measuring AC and DC Voltage 5.1.1 Refer to Section 3.0, Preparation For Use, and Section 4.0, General Operation, before attempting any measurements. 5.1.2 Select the desired AC or DC voltage range by rotating the Range Switch to the desired range. If measuring AC voltage with a Test Set with Cab Filters (SIGNAL SEL. switch will be marked CAB FILTER), set the Signal Select Switch to the AP +/- (ALL PASS / AUTO POLARITY) position to measure all AC voltage present.
Range Switch Leads Red Black Read Scale Multiply Divide / Direct 0.6 VDC 3 VDC 15 VDC 60 VDC 300 VDC VOM VOM VOM VOM VOM COM COM COM COM COM 0 - 60 0 - 300 0 - 15 0 - 60 0 - 300 Divide by 100. Divide by 100. Direct reading. Direct reading. Direct reading. 1.5 VAC 3 VAC 15 VAC 150 VAC 300 VAC 600 VAC VOM VOM VOM VOM VOM VOM COM COM COM COM COM COM 0 - 15 0 - 300 0 - 15 0 - 15 0 - 300 0 - 60 Divide by 10. Divide by 100. Direct reading. Multiply by 10. Direct reading. Multiply by 10. 5.1.
5.2 Measuring DC milliAmps 5.2.1 Refer to Section 3.0, Preparation For Use, and Section 4.0, General Operation, before attempting any measurements. 5.2.2 Select the desired DC mA range by rotating the Range Switch to the desired position. Place the Code Function Switch in the NORM position. The position of the Signal Select Switch has no effect in this mode. 5.2.3 Attach the test leads to the Test Set. The red lead is connected to the VOM Jack, and the black lead is connected to the COM Jack. 5.2.4 sured.
5.2.6 If code parameters are to be measured, select the desired parameter using the Code Function Switch. Refer to Section 2.1 for a description of these functions. Peak levels are measured using the same scales as used in the NORM mode. Rate is read using the black CODE RATE scale. On Time is read using the black percentage (%) scale. Code parameters may be read on any range provided that the peak level is approximately ten percent of full scale. 5.2.
5.3 Measuring DC and AC Amps 5.3.1 Refer to Section 3.0, Preparation For Use, and Section 4.0, General Operation, before attempting any measurements. 5.3.2 Select the desired AC or DC Amps function by rotating the Range Switch to the desired function. If measuring AC Amps with a Test Set with Cab Filters, set the Signal Select Switch to AP +/- to measure all AC current present. If only cab signals are of interest, then set the Signal Select switch to the appropriate frequency.
WARNING: THE 6 AMP AND 30 AMP JACKS ARE UNFUSED. USE EXTREME CAUTION! The black lead is connected to the COM Jack. 5.3.4 sured. Connect the test leads in series with the circuit to be mea- 5.3.5 Read the current on the appropriate scale as noted in the table below. If the NEG Indicator lights, then the input current is negative. Range Switch Leads Red Black Read Scale Multiply Divide / Direct DC Amps DC Amps DC Amps 1.5 A 6A 30 A COM COM COM 0 - 15 0 - 60 0 - 300 Divide by 10. Divide by 10.
5.3.7 Disconnect the test leads from the circuit under test and return the Range Switch to the OFF position. 5.4 Measuring Resistance 5.4.1 Voltage Sensing Mode Before measuring resistance, the circuit to be tested must be checked for a voltage which is present as this may present a safety hazard and/or give a false reading. This is facilitated through the Ohmmeter's voltage sensing mode. 5.4.1.1 Refer to Section 3.0, Preparation For Use, and Section 4.
5.4.1.5 Connect the test leads across the circuit to be measured. 5.4.1.6 If the Pointer deflects, then there is a foreign voltage present which would cause errors in the resistance measurement, if attempted. The approximate full scale voltage is 15 VDC, although AC voltage will also be detected. The NEG Indicator will light if the test leads are unconnected, or if connected and no voltage, or negative voltage is present.
5.4.2.1 Press and hold the Push For Ohms Switch and read the resistance on the red OHMS scale. The Ohmmeter must be properly zeroed. See Paragraph 5.4.1.4. 5.4.2.2 Read the resistance on the appropriate scale as noted in the table below. Range Switch Red Rx1 R x 100 VOM VOM Leads Black COM COM Read Red Ohms Scale Multiply / Direct Direct reading. Multiply by 100. 5.4.2.3 Disconnect the test leads from the circuit under test and return the Range Switch to the OFF position.
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5.5 Measuring Dry Contacts 5.5.1 Refer to Section 3.0, Preparation For Use, and Section 4.0, General Operation, before attempting any measurements. 5.5.2 Set the Code Function Switch to the NORM position. The position of the Signal Select Switch does not matter. 5.5.3 Attach the test leads to the Test Set. The red lead is connected to the VOM Jack, and the black lead is connected to the COM Jack. 5.5.4 Connect the test leads across the contacts to be measured. 5.5.
There is no difference between Peak Hold and Peak Follow in the Dry Contact range. 5.5.8 Disconnect the test leads from the circuit under test and return the Range Switch to the OFF position. 5.6 Measuring DC Pulse Code Signals 5.6.1 Overview The DC Amps function has selectable polarity. This is useful for measuring the transmit and receive currents in pulse coded track circuits. The selection of the polarity is made via the Signal Select Switch.
6.0 SPECIFICATIONS 6.1 Electrical Specifications 6.1.1 DC Voltage Ranges: Accuracy: Sensitivity: Overload: 6.1.2 0.6, 3, 15, 60, and 300 VDC. ±1.5% of full scale 0 to 50 C. ±2.5% of full scale -40 to 85 C. 1000 ohms per volt. Continuous: 20 VRMS or 5 times full scale, whichever is greater, not to exceed 600 VRMS. Ten seconds: 30 VRMS or 10 times full scale, whichever is greater, not to exceed 700 VRMS. DC milliAmps Ranges: Accuracy: Burden Volts: Overload: 15, 60, and 300 mADC. ±1.
6.1.3 DC Amps Ranges: Accuracy: Burden Volts: Overload: 6.1.4 1.5, 6, and 30 Amps DC. ±1.5% of full scale 0 to 50 C. ±2.0% of full scale -40 to 85 C. 60 mV nominal at full scale. Leads add 34 milliohms typical resistance. Fuse in 1.5 Amp range adds 30 milliohms typical resistance. For the 1.5 Amp range, the fuse blows before damage. The 6 Amp and 30 Amp ranges are unfused but can withstand a 50 amp overload for 30 seconds.
6.1.5 AC Voltage Ranges: Accuracy: Sensitivity: Overload: 6.1.6 1.5, 3, 15, 150, 300, and 600 VAC. ±3.0% of full scale 0 to 50 C. ±3.5% of full scale -40 to 85 C. 288 ohms per volt. Continuous: 20 VRMS or 5 times full scale, whichever is greater, not to exceed 700 VRMS. Ten seconds: 30 VRMS or 10 times full scale, whichever is greater, not to exceed 700 VRMS. AC Amps Ranges: Accuracy: Burden Volts: Overload: 1.5, 6, and 30 Amps AC. ±1.5% of full scale 0 to 50 C. ±2.0% of full scale -40 to 85 C.
6.1.7 Common AC Specifications Calibration: Average responding, RMS calibrated. Freq. Response: 25 Hz to 400 Hz for rated accuracy. 60 Hz Filter: 57 Hz to 63 Hz ±1.5% additional level error. 25 Hz > 40 dB (99.0% suppression) 96 Hz > 40 dB (99.0% suppression) 100 Hz Filter: 92 Hz to 100 Hz ±1.5% additional level error. 60 Hz >34 dB (98.0% suppression) 120 Hz >20 dB (90.0% suppression) 156 Hz >47 dB (99.6% suppression) 200 Hz Filter: 196 Hz to 204 Hz ±1.5% additional level error. 156 Hz >20 dB (90.
6.1.8 Code Measurement Specifications 6.1.8.1 Peak Level Measurements Peak Hold: Pointer will deflect to the peak level of the input signal. For repetitive peaks within a ±4% level window, 25 samples are averaged, then no further updates occur unless the level exceeds the captured peak. Peak Follow: Pointer will deflect to the peak level that is at least 25% of the previously displayed peak. Level Stability: For a peak to be detected, the signal must remain level stable within ±4.
6.1.8.2 Timing Measurements On Time: Accuracy: Zero Offset: Range: 0 to 100%. ±3% of full scale from 10% to 100%. ±3.0% of full scale max. Rate: Accuracy: Range: 30 to 500 cycles per minute. ±3% of scale length. Zones: 50 cpm: 47.5 to 50.75 cpm. 75 cpm: 71.0 to 77.0 cpm. 120 cpm: 118.0 to 125.0 cpm. 180 cpm: 175.9 to 187.2 cpm. 270 cpm: 263.9 to 276.5 cpm. 420 cpm: 410.5 to 423.0 cpm. Timeout Period: 2 to 8 seconds is required for an update on the timing functions.
6.1.9 Ohmmeter 6.1.9.1 Voltage Sense Mode Range: Accuracy: Sensitivity: Overload: 15 V DC auto-polarity or AC to 1 KHz typical. NEG indicator is on for zero and negative inputs. ±20% -40 to 85 C. 1000 ohms per volt. Continuous: 50 VRMS. Ten seconds: 120 VRMS. 6.1.9.2 Resistance Measurement Mode Ranges: Center Scale: Accuracy: Open Circuit Voltage: Test Current: Overload: R x 1 and R x 100. 5 and 500 ohms. ±2.0% of scale length ±0.5 ohms 0 to 50 C. ±3.0% of scale length ±0.5 ohms -40 to 85 C. 1.
6.1.10 Dry Contact Functions Normal: Pointer follows contact closure. Open: zero ±3.0% of full scale. Closed: full scale ±0.5%. On Time: Range: 0 to 100 %. Accuracy: ±2% of full scale from 10% to 100%. Zero offset: ±3.0% of full scale max. Rate: Range: 30 to 500 cycles per minute. Accuracy: ±3% of scale length. Peak Hold: Pointer will deflect to full scale and remain there with a 2.0 millisecond or longer contact closure. Allowable Contact Resistance: 0 to 100 ohms. Test Voltage: 7.5 to 15 VDC.
6.1.11 Power Requirements Batteries: Two, 9 volt alkaline batteries (NEDA 1604) One, 1.5 volt alkaline D-cell (NEDA 13F) Expected Life: Normal operation: 320 hours. Sleep mode: 2000 hours. Cutoff Voltage: 10.5 volts minimum for both 9V batteries in series. The ohmmeter circuit is designed to properly zero with a D-cell battery from 1.0 to 1.8 volts. Sleep Timer: Test set falls asleep after 3 to 7 minutes with no meter deflection greater than 1% of full scale typical. 6.1.
6.2 Physical Specifications Size: Weight: Moisture Resistance: Temperature: Humidity: 5.0" wide x 6.5" high x 3.2" deep. Approximately 2.75 pounds, 4.75 pounds with case and leads. Test Set is not damaged by exposure to rain. Operating and storage: -40 to 85 C. 0 - 95% non-condensing. Note: Specifications subject to change without notice.
7.0 ACCESSORIES, PARTS & SERVICE 7.1 Cleaning the Window Other than battery and fuse replacement, cleaning the window is the only service that can be performed by the user. This may be done by using a soft cotton cloth dipped in a solution of household detergent and water. Wipe the window and allow to dry without rubbing or polishing. This will help to maintain the anti-static properties so that the pointer does not stick or become erratic. Clean both the meter window and the protective window. 7.
7.3 Factory Service WARNING - DO NOT ATTEMPT TO SERVICE THIS UNIT. ANY ATTEMPT TO SERVICE BY AN UNQUALIFIED PERSON MAY BE DANGEROUS AND/OR LETHAL AND WILL VOID YOUR WARRANTY.
7.4 Parts and Accessories The following parts and accessories are available. Contact the factory for the latest in accessories.
Parts and Accessories (continued) Description Part Number Test Leads, 14 AWG 79-767 Nine volt alkaline battery 37-48 D-cell alkaline battery 37-24 Fuse, 1A/250V 8AG Instrument 3207-30 ( Littelfuse 361001,Bussman AGX 1) Fuse, 10A/250V 3AB Normal Blow, Ceramic 3207-21 ( Littelfuse 314010, Bussman ABC 10 ) Protective Window with screws 13568 Padded carrying case, yellow nylon 10-3967 Shoulder strap 3206-74 Tester hold down strap with hooks 3206-77 for 2000 Series (2 required) Tester hold down strap with Velcro
8.0 LIMITED WARRANTY Triplett / Jewell Instruments warrants instruments and test equipment manufactured by it to be free from defective material or workmanship and agrees to repair or replace such products which, under normal use and service, disclose the defect to be the fault of our manufacturing, with no charge within one year of the date of original purchase for parts and labor. If we are unable to repair or replace the product, we will make a refund of the purchase price.
