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Table of Contents
Summary of Contents for Zebra ZebraStat ZS-2
- Page 1 ZebraStat ® Model ZS-2 Operation Manual...
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Page 2: Table Of Contents
Contents Safety Information........3 Using the ZebraStat ......4-5 Troubleshooting Electronic Boards..6-7 Voltage Problems........8-9 Feature Identification (Photo)....10-11 Continuity Mode........12-13 Analysis Mode........14-15 Activation Mode........16-17 Circuit Protection........18 Avoiding Problems........19 Warranty........Back Cover Specifications Your ZebraStat will give you longer life if you treat it carefully, like any other sensitive tool. Maximum Input Voltage......28 Volts Maximum Current Through Unit....5 Amps Overall Circuit Protection.....5 A. -
Page 3: Safety Information
Safety Information Please read these instructions before using your ZebraStat.They contain information to protect you, your customers, and their prop- erty from harm or damage. Understanding the proper use of this tool may also assist you to make quicker and more accurate diagnostics on the equipment that you service. -
Page 4: Using The Zebrastat
Using the ZebraStat To use your ZebraStat, follow these steps: 1) Decide the mode that you want to use 2) Hook up appropriate leads to equipment 3) Manipulate Mode & Component switches 4) Observe the LED’s and equipment tested Explanation of steps: 1) Mode. - Page 5 2) Hook-Up. Start with the Mode Switch in the ANALYZE position and have all component switches OFF. The hookup of Zebra-Stat’s leads is the same for all modes. First, connect the component lead’s alligator clips to their re- spective wires at the equipment.
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Page 6: Troubleshooting Electronic Boards
Troubleshooting Electronic Boards A blown fuse on an electronic control board presents special challenges. Rather than just replacing the fuse (and possibly watch it ‘blow’ again) the ZebraStat offers a diagnostic al- ternative. The White wire (the HEAT1 circuit) has a special function built into it. Between the Red and White wires is a low-amp, auto- reset, solid-state 'circuit breaker'. - Page 7 Troubleshooting (continued) If the current flowing into the Zebrastat through these two wires should exceed 3 Amps, the breaker will ‘trip’, and the lower Trip LED will light. The breaker will stay in this ‘tripped’ condition until the power is removed from one of the leads for about 15 seconds.
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Page 8: Voltage Problems
Voltage Problems Voltage problems in a system are frequently overlooked, but are very easy to find. For in- stance, many technicians don’t compare the current draw on contactors when replacing one. In most cases there won’t be a problem, but if the transformer is already close to its output capacity, and the new contactor re- quires a higher current level to close, inter- mittent problems are likely to arise, especially... - Page 9 Voltage Problems (continued) There are 3 red LED’s in the voltage section: ON, ??, and OK. The ON LED will light when the voltage applied to the power input leads is at least 8 volts. The ?? (Questionable) LED glows about half-brightness at 19.5 volts, and full-brightness at 20.5 volts.
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Page 10: Feature Identification (Photo)
Feature Identification Mode Switch Upper Trip LED (Red) Voltage Monitor Lower Trip LED Lead Compartment Magnet (on back) Quick Reference ZebraStat Model ZS-2... - Page 11 Hanging Hook Component Switches Component Displays Continuity LED’s (6 - Green) Activation LED’s (6 - Yellow) Wire Color Codes Leads Velcro Strap...
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Page 12: Continuity Mode
Continuity Mode Continuity Mode tests that the wires your ZebraStat ’s leads are connected to ‘go some- where’ electrically. For instance, the wire that you connected the FAN lead to normally goes through a fan relay. Using this mode will tell you if there is a continuous circuit through that relay on the other end of the wire. - Page 13 Continuity (continued) Caution: The continuity mode passes a very small amount of current to ‘test’ each of the circuits that it is connected to. As more mod- ern equipment uses computer-type process- ing boards to control equipment, some may be designed that have functions that might be activated by the ZebraStat ’s tiny (about 7 mil- liamps) of current to test the different circuits.
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Page 14: Analysis Mode
Analysis Mode Analyzis Mode simply displays any control power that is being sent to the circuits that your leads are connected to. The red LED’s will indicate the level of AC power available at the equipment. Yellow component LED’s will illu- minate on each circuit that is currently ener- gized. - Page 15 Analysis (continued) ZebraStat 2) Attach the ’s component lead’s alligator clips to the appropriate equipment wires, then attach the Red and Blue power leads to the equipment’s 24VAC hot and com- mon wires, observing polarity. 3) Notice which yellow LED’s are illuminated under their component switches.
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Page 16: Activation Mode
Activation Mode Activation mode is similair to having a remote- controlled thermostat. Technicians often use this mode when the thermostat is not easily accessible, as in when making a diagnosis or repair to equipment in an attic, basement, on a roof, or other location remote from the area where the thermostat is located. - Page 17 Activation (continued) Caution: Remote activation can surprise an- other technician working elsewhere on related equipment. Communicate your intentions to anyone else involved. For instance, when re- motely activating the cooling stages of a sys- tem; you don’t want to start a fan or compres- sor that someone may be inspecting.
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Page 18: Circuit Protection
Circuit Protection Your ZebraStat provides circuit protection in two ways. Each uses a solid-state, automati- cally-resetting circuit breaker device. The white test lead is protected with a 3 Amp de- vice. You can learn more about its use in the “Troubleshooting Electronic Boards”... -
Page 19: Avoiding Problems
Avoiding Problems 1) The “power-in” wires (RED & BLUE) ARE PO- LARIZED, even though it’s an AC circuit! The RED lead must connect to the equipment’s HOT wire (usually red), and the BLUE lead must connect to the equipment’s COMMON wire (usually brown or blue). - Page 20 One Year Limited Warranty For a period of one (1) year from the origi- nal end-user’s date of purchase, Zebra Instruments warrants that this tool will per- form as described. Should you encounter any problems, please contact us and we will attempt to resolve your problem as quickly as possible.