Wavetek Meterman 23XT Manuel D'utilisation page 28

AC Current
Ranges
23/27XT: 200µA, 2, 20, 200mA, 10A
25/28XT: 200µA, 2, 20, 100mA, 20A*
* 15 to 20A for 30 sec max
Resolution, 200µA range: 100nA
Accuracy (50-500Hz), 200µA 100/200mA rgs:
±(1.5% rdg + 4 dgt)
10/20A rgs: ±(2.5% rdg + 4dgt)
OL Protection, fast blow ceramic fuse
mA input, 23/27XT: 500mA/250V
mA input, 25/28XT: 100mA/250V
10A input, 23/25XT: 10A/600V
20A input, 27/28XT: 20A/600V
Resistance
Ranges
23/27XT: 200Ω, 2, 20, 200kΩ, 2, 20,
2000MΩ
25/28XT: 200Ω, 2, 20, 200kΩ, 2, 20MΩ
Resolution, 200Ω range: 100mΩ
Accuracy, 200Ω to 2MΩ ranges: ±(1.0% rdg
+ 4dgt)
20MΩ range: ±(2.0% rdg + 4 dgt)
2000MΩ rg: ±{(5.0% rdg -10dgt) +
10dgt)}
OL Protect., all rgs: 500VDC or AC RMS
Open Circuit Voltage, 200Ω, 2000MΩ
ranges: 3.0VDC typical,
other ranges: 0.3VDC
Continuity
Audible Indication, 2V rg: at R ≤75Ω
Response time: 500ms approx
Open circuit volts: 3.0VDC typical
OL Protection: 500VDC or AC RMS
Diode Test
Test Current: 1mA (approx.)
Test Voltage: 3.0VDC typical
Accuracy: ±(1.5%rdg +1dgt)
Display, 2V range: Forward Junction Voltage
OL Protection: 500VDC or AC RMS
Logic Test (23/25/27XT)
Logic Type: TTL, CMOS
Thresholds, Logic 1 (HI):
TTL: 2.8V±0.8V / CMOS: 4.0V±1.0V
Thresholds, Logic 0 (LO):
TTL: 0.8V±0.5V / CMOS: 2.0V±0.5V
Test Voltage, TTL: 5VDC; CMOS: >5VDC and
<10VDC
Frequency Response: 20MHz
Pulse Width: 25ns min.
Duty cycle: >20% and <80%
Pulse rise time: 10µsec
Pulse repetition rate: 1Mpps
Indication: 40ms beep at logic O (LO)
OL Protection: 500VDC or AC RMS
Transistor Beta (23/25XT)
Transistor types: NPN, PNP
hFE Range: 0-1000
hFE Base Current: 10µAdc approx.
hFE Voltage C-E = 3.0VDC approx.
Temperature (23XT)
Ranges : 200, 750°C; 200, 1400°F
Accuracy:
-20 to 200°C: ±(1.0%rdg +2°C)
200°C to 750°C: ±(3.0%rdg +2°C)
-4°F to 200°F: ±(1.0%rdg +4°F)
200°F to 1400°F: ±(3.0%rdg +4°F)
Temperature (28XT)
Ranges : 200, 1300°C; 200, 2000°F
Accuracy:
-30 to 1300°C: ±(1.0%rdg +1°C)
-22°F to 2000°F: ±(1.0%rdg +2°F)
Frequency (25/27/28XT)
Ranges
25XT, autoranging: 2kHz, 40kHz,
27XT, autoranging: 2kHz, 20MHz
28XT, manual rng: 200Hz, 20kHz
Accuracy (>10Hz) ±(0.5% +3dgt)
Sensitivity, 25/28XT: 2V RMS
27XT:
Low, 10Hz to 1MHz: 250mV RMS;
Low 1MHz to 20MHz: 2V RMS
High: 10 to 100kHz: 2V RMS
Min Pulse Width, 25/28XT: >150µs;
27XT: ≥25ns
Duty Cycle Limits: >30% and <70%
OL Protection: 500VDC or AC RMS
Capacitance (25/27/28XT)
Ranges:
25XT: 200pF, 2, 20, 200nF, 2, 20, 200,
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