Test Products International 291 - Manual (Page 7)

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INTERNATIONAL SYMBOLS
CAUTION: RISK OF ELECTRIC SHOCK
AC (Alternation Current)
DC (Direct Current)
REFER TO INSTRUCTION MANUAL
GROUND
DOUBLE INSULATION
EITHER DC OR AC
C. TECHNICAL DATA
1. Features and Benefits
Agency UL Listed to U.S. and Canadian
Safety Standards. Meets CE
and IEC 1010.
4000 Count Improves the resolution on all
functions and ranges.
Data Hold Maintains the reading on the
display for hard to reads areas.
Peak Mode Measure the inrush current of
motors, relays and solenoids.
Sleep Mode Automatically powers down
after 10 minutes of inactivity.
2. Product Applications
Perform the following tests and/or measurements with
the 291 and the appropriate function:
HVAC/R
ACA
• Heat anticipator current in thermostats.
ACV • Line voltage.
ACV or DCV • Control circuit voltage.
OHMS
• Heating element resistance (continuity).
OHMS • Compressor winding resistance.
OHMS • Contactor and relay coil resistance.
ACA • Motor and compressor start up current.
OHMS • Continuity of wiring.
ALL • Bar graph to indicate rapid fluctuations.
ELECTRICAL
ACV
• Measure line voltage.
ACA • Measure line current.
OHMS • Continuity of circuit breakers.
DCV • Voltage of direct drive DC motors.
ACA • Start up current of motors, relays,
contactors and transformers.
ELECTRONIC
ACV
• Measure power supply voltage.
ACA • Measure power supply current.
OHMS • Continuity of circuit breakers and fuses.
!