GTC CT8025 Manual

1. SAFE TY RULES
This meter is designed for indoor use at temperatures between 0°C to 40°C and
•
altitudes up to 2,000m.
• To ensure that the meter is used safely, follow all safety and operating instructions in
this operation manual. If the meter is not used as described in this operation manual,
the safety features of this meter might be impaired.
• Do not use the meter if the meter or test leads look damaged ,or if you suspect that
the meter is not operating properly.
• When using the instrument, keep your fi ngers behind the fi nger guards on the plastic
casing and probes.
• Disconnect the live test lead before disconnecting the common test lead.
• Make sure power is off before cutting, desoldering, or breaking the circuit wires. Small
amounts of current can be dangerous.
• Do not apply more than 600 VDC or 600V AC rms between a terminal and ground.
• To avoid electrical shock, use CAUTION when working above 60V DC or 25V AC rms.
Such voltages pose a shock hazard.
• Never make measurements with the battery cover off.
• To avoid electrical shock or damage to the meter, do not exceed the input limits.

2. INTERNATIONAL SYMBOLS

Important information
see manual
AC
DC

3. TECHNICAL SPECIFICATIONS

3.1 General Specifi cations
Display: 4 digits LCD, max. of 9999 display
Polarity: Automatic, (-) negative polarity indication
Zero adjustment: Automatic
Sample rate: 0.25 Sec., 0.05 Sec. for bar graph
OL
Over range indication: "
Power: 9-volt battery type NEDA 1604, IEC6F22
Battery life: Approx. 70 hours. (w/ alkaline batteries)
Dimension: 5.9"x2.95"x1.34" or 150x75x34 mm.
Weight: Approx. 8.9 Oz. or 252g (with battery).
Accesories: User's Manual, Test Leads, Protective
Holster, Hard carriying case, K-type
temperature probe, Inductive pick-up and
9V battery.
3.2 Electrical Specifi cations
Accuracies are ±(% of reading + number of least signifi cant digits) at 23°C
• 
±5°C, less than 75% RH. For DC/AC current measurement, the maximum
current of 10 A is for 30 Sec. with 5 min. cool down between measurements.
Function Range Accuracy
999.9 mV,
9.999 V, 0.3%+3
99,99V
DC Voltage
600 V 0.3%+5
999.9 mV 2.5%+5
AC Voltage
9.999 mV,
2.5%+5
99.99 V
4000 mA 1.2%+6
DC Current
10.00 A 0.8%+4
4000 mA 2.5%+10
AC Current
10.00 A 1.2%+3
Dangerous Voltages
Continuity
Ground
Double Insulation
" is displayed
Input
Remarks
Impedance
10 M 
16 M for
-
999.9 mV
range
10 M 
50~200Hz
16 M for
999.9 mV
50~500Hz
range
0.03V/A
Burden -
Voltage
0.03V/A
Burden -
Voltage
Function
Resistance
Diode Test
Frequency
0.05 - 250 mS
Fuel
Injector
0.05 - 250 mS
120-20000 RPM
Tachometer 60-10000 RPM
30-5000 RPM
Dwell
301º to 500ºC
Temperature
573º to 932ºF

4. OPERATION

4.1 Instrument Description

1) Case
2) 4 Digit LCD display
3) Secondary Functions Button
4) Auto/Manual Select
5) Function Switch
6) Current Measurment Input
7) Common Input
8) Measurements Input
9) Trigger and Rel. Button
10) Hold and Max/Min. Button
Overload
Protection

4.2 Display Description

600 Vrms
Autoranging
Auto Power Off
Record
Function
600 Vrms
Max./Min.
10 A - 250V
and Average
Fast Acting
Fuse
Bar Graph/Trigger Polarity
10 A - 250V
Fast Acting
Fuse
8025
CT
Input
Range Accuracy
Impedance
999.9 0.5%+6
9.999 k
0.5%+2
99.99 k
-
999.9 k
0.8%+2
4.000M
40.00 M 1.5%+5
9.999 V - < 3.5 V Test Voltage
999.9Hz to 1, 2, 20 and 200 Vrms
0.01%+2
20.0 kHz Selectable threshold
0.05mS+1
0.0 - 100 % 0.04%/krpm +2
0.05mS+1
0.0 - 100 % 0.04%/krpm/cyl +2
2 RPM
0.0º - 360.0º 1.2 º/krpm+1
0.0º - 100.0º 0.04 º/krpm/cyl +2
-20º to 300ºC 3 ºC +1
2%+1
K-Type Thermocouple
0º to 572ºF 6 ºF+2
2%+2
1
2
3
4
5
6
Digital
Hold
Readout
Analog
Bar Graph
Overload
Remarks
Protection
1.3 V
Max. Test
Voltage
600 Vrms
(2.7 V in
999.9 
range)
600 Vrms
600 Vrms
Selectable
+/- Slope,
and 600 Vrms
Number of
Cylinders
RPM 4
RPM 2 600 Vrms
RPM 2M
1 to 12
600 Vrms
Cyl.
600 Vrms
Probe
10
9
8
7
Low Battery
Relative
ment
Measure
Bar Graph
Overfl ow