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THURLBY THANDAR INSTRUMENTS
1604 4¾ digit Bench Multimeter
TTi
1604
All accuracies apply for 1 year, 19oC to 25oC. Temperature coefficient outside
these limits is <0.1 x quoted range accuracy per oC.
40,000 COUNT DIGITAL MULTIMETER
T-Hold
V
Hold
T-Hld
Ω
k ΩΩ
A
Min
Null
kΩ
Max
Hz
Auto
mV
mA
Continuity
Diode Test
mV
Ω
V
Hold
Min-Max
mA
Null
Reset
DC
AC
Hz
(AC Ranges)
Operate
THURLBY THANDAR INSTRUMENTS
All inputs 1kV Cat.I, 600V Cat.IImax. to
10A
mA
10A max. FUSED
1A max. FUSED
Range
Accuracy
Resolution
Notes
400mV
4V
40V
400V
1000V
0.08% ± 4 dig.
0.08% ± 4 dig.
0.08% ± 4 dig.
0.08% ± 4 dig.
0.09% 4 dig.
10µV
100µV
1mV
10mV
100mV
Max. Input 265V DC/AC rms
Input impedance 10MΩ nominal Max. input 1kV DC or AC
pkNMR: >60dB @ 50/60Hz
CMR: >90dB @ DC/50Hz/60Hz
Auto/Man
SHIFT
FUNCTION
HIGH RESOLUTION MEASUREMENT
SERIAL DATA INTERFACE
TRUE RMS AC
AC Power
DC VOLTAGE
Review
A
RANGE
V/
ΩΩ
COM
max.
750V AC
1000V DC
AC VOLTAGE (True RMS, 4000 count scale length)
40,000 count scale length
● Accuracy 0.08%; resolution 10µV, 10mΩ & 0.1µA
● Large and bright LED display; ac line operation
● True RMS ac functions; wide ac bandwidth
● Frequency measurement; continuity; diode test
● Relative, T-Hold and Min-Max functions included
● Isolated RS-232 interface as standard
●
A value-for-money DMM
The 1604 is a low-cost auto/manual ranging bench-top DMM with a large
and bright LED display.
It offers 4¾ digit (40,000 count) scale length, true RMS ac measurements,
a basic accuracy of 0.08% and a resolution of 10µV, 10mΩ and 0.1µA.
A substantial bench-top instrument
The 1604 is a robust mains-powered bench-top instrument. Unlike a
hand-held multimeter it stays where you put it even with heavy test leads
connected. The multi-position tilt stand ensures that the large display is always readable.
Smart functions
The 1604 incorporates several “smart” functions such as Relative measurement and Minimum-Maximum storage.
The T-Hold function enables readings to be held on the display automatically each time a new test point is probed.
True RMS ac ranges
All AC measurements on the 1604 are True RMS. This avoids the errors
on non-sinusoidal waveforms associated with other multimeters.
Good ac bandwidth enables measurement within the audio band and ensures that higher frequency components of switching waveforms are included within the measurement result.
Frequency measurement
The 1604 has a frequency function which can be selected on any ac range
in order to measure the frequency of the signal. Frequencies up to 40kHz
can be measured and the maximum resolution is 0.1Hz.
Isolated RS-232 interface
The 1604 is fitted with an isolated RS-232 interface. This permits remote
control and data-logging to disk using optional Windows based software.
DISPLAY and RANGE CONTROL
0.56” (14mm) LED display. Annunciators for all ranges, functions and
'smart' modes. Scale Length 4¾ digits (± 40,000 counts) except ac
ranges ( 4,000 counts). Reading rate 2.5 per second. Each measurement function can use automatic or up/down manual ranging.
RS-232 INTERFACE
Opto-isolated bi-directional RS-232 interface. 9600 baud.
GENERAL
Power:
Size:
Weight:
Operating Range:
Storage Range:
Safety:
EMC:
230V or 115V AC nominal 50/60Hz, adjustable internally; operating range ±14% of nominal; 3VA max.;
Installation category II
260(W) x 88(H) x 235(D)mm, excl. handle/feet.
2.0kg (4.4lb)
+ 5°C to 40°C, 20-80% RH.
- 40°C to 70°C
Complies with EN61010-1.
Complies with EN55081-1 and EN50082-1.
Note: This is a faxable data sheet, a colour brochure is also available.
Range
Accuracy
Resolution
400mV
4V
40V
400V
750V
45Hz - 400Hz 400Hz - 5kHz 5kHz - 20kHz
1% ± 4 dig.
3% ± 4 dig.
0.5% ± 4 dig. 2% ± 4 dig.
5% ± 4 dig.
3% ± 4 dig.
1% ± 4 dig.
100µV
1mV
10mV
100mV
1V
Accuracies apply for readings between 10% and 100% of full scale. Additional error
at crest factor = 3 is typically 1%. Input impedance = 10MΩ nominal. Max. input =
750V rms, 1kV pk. (265V rms on 400mV range). 1kΩ unbalanced CMR = >60dB at
DC or 50Hz (60Hz rejection available as factory option).
RESISTANCE
Range
Accuracy
Resolution
Notes
400Ω
4kΩ
40kΩ
400kΩ
4MΩ
40MΩ
0.15% ± 6 dig.*
0.1% ± 4 dig.
0.1% ± 4 dig.
0.15% ± 4 dig.
0.3% ± 6 dig.
1.0% ± 10 dig.
10mΩ
100mΩ
1Ω
10Ω
100Ω
1kΩ
* 400Ω specification applies after null Max. input 265V DC or
AC rms on any range.
Max. open circuit voltage 4V
40MΩ accuracy applies up to
20MΩthereafter add 1%
DC CURRENT
Range
Accuracy
Resolution
Notes
4mA
400mA
10A (up to 1A)
10A (up to 5A)
10A (up to 10A)
0.1% ± 4 dig.
0.1% ± 4 dig.
0.3% ± 4 dig.
1.0% ± 4 dig.
3.0% ± 10 dig.
0.1µA
10µA
1mA
1mA
1mA
Max. input 1A (Fused)
Voltage burden <500mV
Max. input 10A (Fused)
Voltage burden <500mV
AC CURRENT (True RMS, 4000 count scale length)
Range
Accuracy
Resolution
Notes
1mA
100mA
10A (up to 1A)
10A (up to 5A)
10A (up to 10A)
0.5% ± 4 dig.
0.5% ± 4 dig.
0.8% ± 4 dig.
1.5% ± 4 dig.
3.0% ± 4 dig.
1µA
100µA
10mA
10mA
10mA
Max. input 1A (Fused)
Voltage burden <500mV
Max. input 10A (Fused)
Voltage burden <500mV
Accuracies apply over 45Hz to 10kHz for readings between 10% and 100% of
range. Additional error at crest factor = 3 is typically 1%.
FURTHER FUNCTIONS
Continuity
Selects 4kΩ range and sounds audible tone for impedance <10Ω. Max.
input 265V DC or AC rms.
Diode Test
Displays junction voltages up to 3V at a test current of 1mA at 1V. Max.
open circuit voltage approximately 4V. Max. input 265V DC or AC rms.
Null (Relative):
Hold:
T-Hold:
Min/Max:
Stores current reading and subtracts it from future
readings.
Reading is frozen until released.
Reading is frozen when it becomes stable.
Minimum and maximum readings are stored.
Thurlby Thandar Instruments Ltd. operates a policy of continuous development
and reserves the right to alter specifications without prior notice.
Designed and built in the EEC by:
Thurlby Thandar Instruments Ltd.
Glebe Road, Huntingdon. Cambs. PE18 7DX England
Tel: +44 (0)1480 412451 Fax: +44 (0)1480 450409
e-mail: [email protected] Web: http://www.ttinst.co.uk
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