GTC CT8025 Instructions

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: 3-1/2 digits LCD, max. of 1999 display
Polarity: Automatic, (-) negative polarity indication
Zero adjustment: Automatic
Sample rate: 0.5 Sec.
Over range indication: "1" or "-1" is displayed
Power: 9-volt battery type NEDA 1604, IEC6F22
Battery life: Approx. 50 hours. (w/ alkaline batteries)
Dimension: 5.55"x2.71"x1.41" or 141x 69x36 mm.
Weight: Approx. 6.7 Oz or 190g (with battery).
Accesories: User's Manual, Test Leads, Protective
Holster, Soft Pouch, K-type temperature
probe 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.
Function Range Accuracy
DC Voltage 20V, 600V
AC Voltage 600V
DC Current 10A
200020k
200kM
Resistance
20M
500 to 10000
Tachometer
RPM
0 to 40º
Temperature
-40º to 400º
º C Version
400 to 1000ºC
Dangerous Voltages
Continuity
Ground
Double Insulation
Input
Remarks
Impedance
1 M 
0.8%+2 -
450 K 
1.5%+5 40~400Hz
2.0%+5 -
0.8%+3 -
3.2V
1.5%+5 - max. test
Voltge
3.0%+10 -
0.8%+2 Test time: 20 Sec.
3.0%+1 Internal sensor
0.75%+3
K-Type Thermocouple
Probe
3.0%+10
Function
Temperature
º F Version
752 to 1832 ºF
Dwell Angle
Continuity Buzzer sounds when <100
Diode Test
4. OPERATION

4.1 Instrument Description

1) Case
2) 3-1/2 Digit LCD display
3) Power OFF position
4) Tachometer function
5) Function/Range Switch
6) Temperature function
7) Resistance function
8) Temperature probe socket
9) Input and common connector
10) DC Voltage function
11) AC Voltage function
12) DC Current function
13) Dwell function

4.2 Measurement Procedures

CAUTION: Maximum Input Voltage is 600Vrms,do not exceed
CAUTION: Always ensure that the correct terminals are used for
4.2.1 DC Voltage measurement
Overload
•
Protection
Connect the black test lead to the "COM" socket and red test lead
to the "V " socket.
600 Vp-p
•
Set the FUNCTION/RANGE switch to the desired range in the
600 Vp-p
"V " function. If the voltage range is not known beforehand, set
the switch to the highest range and work down as needed.
10 A - 250V
Fuse
•
Connect the test leads across the source or load under
measurement.
•
250 Vp-p
The measurement and polarity will be shown the LCD Display
when the probe are connected.
4.2.2 AC Voltage measurement
250Vp-p
•
Connect the black test lead to the "COM" socket and red test lead
to the "V " socket.
-
•
Set the FUNCTION/RANGE switch to the desired range in the
"V " function.
8025
CT
Input
Range Accuracy
Impedance
32 to 104ºF 3.0%+1
-40 to 752 ºF 0.75%+3
K-Type Thermocouple
3.0%+10
3 to 8 Cyl.
1.5%+2 0.1 º Resoultion
0-120º
Test Voltage: 2.4 V Max.
Test Current:1.0±0.6mA Test Voltage: 2.4 V Max.
2
3
4
5
6
7
8
9
this rating to avoid personal injuries or damage to
the instrument. The range FUNCTION/RANGE
switch should be set to the range you want to test
before the operation.
the type of measurement to be made. Avoid making
connections to "live" circuits whenever possible.
When making current measurements ensure that
the circuit is not "live" before opening it in order to
connect the test leads.
Overload
Remarks
Protection
Built in Sensor
-
Probe
250 Vp-p
250 Vrms
250 Vrms
-
+
AUTO POWER OFF
10
OFF
TACHO X 10
V
11
V
A
12
13
DWELL
Ω
TEMP
°C
COM
max 10A V
fused
Ω
max
600V