Data Sheet

Brochure Part No. 82100-1530 Issue 2
Designed and built in Europe by:
Thurlby Thandar Instruments Ltd.
Glebe Road, Huntingdon, Cambridgeshire. PE29 7DR United Kingdom
Tel: [phone] Fax: [phone]
Email: [e-mail] Web: www.aimtti.com
Technical Specifications - 1908 and 1908P (continued)
Available from:
EXTERNAL REMOTE TRIGGER (TTL/CMOS)
Connection: Terminal block on rear panel.
Input: Input to the LED of an opto-isolator through 1kW resistor.
Apply >+3V to trigger remote input. Max. Voltage 10V.
Output: Opto-isolated open collector output, conducts for 250ms on
completion of input trigger. Max. off-state Voltage: 10V.
On state sink current 2mA (typical).
DISPLAY
Display Type: High contrast backlit transflective LCD.
Main display 5½ digits 17mm high,
Secondary display 6 digits 10mm high.
Scale Length: 120,000 counts for most measurement parameters
Annunciators: LCD annunciators for all ranges, functions and program modes.
Overrange: Displays OFL if input too large for range.
Overflow: Displays -Or- if calculated result overflows display.
COMPUTING FUNCTIONS
Null (Relative) Stores current reading and subtracts it from future readings.
W Null: Additional non-volatile function for nulling test lead resistance.
Hold: Reading is frozen
T-Hold: (Touch & Hold) Reading is frozen when stable.
dB: Displays measurement in dBm relative to 600W or other
user-entered impedance.
AC plus DC: The RMS value of the AC plus DC parts of the signal is calculated
and displayed.
% Deviation: Displays % deviation from entered reference value.
Ax+b: Linear scaling of results, with offset.
Limits: Reading displayed with HI, LO, or PASS with respect to
user-defined high and low limits.
Min/Max: Minimum and maximum reading stored.
Power: Calculates V
2
/R and displays in Watts with respect to a
user-defined impedance.
VA: Calculates and displays Volts x Amps.
Data Logger: Manual or automatic storage of 500 measurements. Storage
interval 1s to 9999s or at the measurement sample rate,
manually from keyboard, or by external triggering.
DIGITAL INTERFACES - 1908
Full digital remote control facilities are available through a USB connection.
USB: Standard USB 2.0 hardware connection. Host Powered.
DIGITAL INTERFACES - 1908P
Full digital remote control facilities are available through the RS232, LAN, USB and GPIB
interfaces.(AC line power is required for RS232, LAN and GPIB interfaces.)
RS232: Standard 9-pin D-connector. Baud rate 9600.
USB: Standard USB 2.0 hardware connection. Host powered.
LAN: Ethernet 100/10base-T hardware connection.
LXI Conformance: 1.4 LXI Core 2011.
GPIB: Conforms with IEEE488.1 and IEEE488.2.
Remote Command
Processing Time: Typically <100ms.
SOFTWARE SUPPLIED
IVI Driver: An IVI driver for Windows is supplied.
LV/CVI Driver: Full installation for CVI and LabVIEW instrument drivers.
USB Driver: An installation file is supplied calling a standard Windows*
USB driver.
POWER REQUIREMENTS
AC Input: 220V-240V or 110-120V AC ±10%, 50/60Hz, by internal
adjustment; 20VA max. Installation Category II.
Batteries: Internal rechargeable Nickel Metal Hydride
Battery Life: > 20 hours with the backlight enabled. Battery life can be
increased to > 35 hours with the backlight disabled.
GENERAL
Operating Range: +5°C to + 40°C, 20% to 80% RH
Storage Range: -20°C to + 60°C
Environmental: Indoor use at altitudes up to 2000m, Pollution Degree 2.
Safety and EMC: Complies with EN61010-1, EN61010-2-030, EN61010-2-033 &
EN61326-1. For details, request the EU Declaration of Conformity
for this instrument via http://www.aimtti.com/support
(serial no. needed)
Security: Kensington security slot incorporated.
Size: 250(W) x 97(H) x 295(D)mm in bench-top configuration
213.5(W) x 86.5(H) x 269(D)mm (2U/ ½ - rack) in rack mount
format.
Weight: 3.2kg.
Thurlby Thandar Instruments Ltd. operates a policy of continuous development and reserves the right to
alter specifications without prior notice.