4
Operating Facilities
Noise Filter (Input A only)
The Filter key controls a low pass filter, with a cut-off frequency of about 50kHz, to assist in
obtaining stable readings at low frequencies.
Hold
Pressing the Hold key will hold the current measured value in the display, with the Hold indicator
on, until the Hold key is pressed again. The measurement continues in the background when
Hold is on. A long press on the Hold key clears old data and restarts the measurement.
Intelligent Power Switching
The unit automatically selects the best available power source of AC adaptor, USB or battery.
Intelligent switching avoids discharging the battery overnight when operated from externally
switched AC power.
A press-to-measure facility allows a quick measurement to be made by pressing a function select
key which will power the instrument up in the corresponding function. The instrument will
automatically switch off 15 seconds after the last key-press.
Remote Control
All capabilities can be controlled remotely and measurements read through a USB port.
The instrument can be powered (but the battery cannot be charged) by the USB host.
Interface:
Serial port emulation over USB.
Current consumption:
< 100mA (<5mA if AC adaptor power is present)
Command set:
Instrument specific. TF830 and TF930 compatible.
Power Requirements
The instrument has fixed internal rechargeable batteries and is supplied with a universal voltage
external mains adaptor with interchangeable UK, Euro, Australian and US power connectors.
Battery Type:
Three 2500mAh NiMH cells.
Battery Operating Life: Typically 24 hours
Low Battery Indicator:
‘Lo Bat' shows in display when approximately 10% of battery life remains.
Recharge Time:
< 4 hours
Adaptor Supply range: 85 to 240V, 50 or 60 Hz,
Power consumption:
5W max at DC input to unit; 15VA max at AC adaptor input (charging).
General
Display:
10 digit LCD, 12.5mm high (0.5”). Annunciators show input
configuration, operating mode, measurement units and gate time.
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
Size:
260mm(W) x 88mm(H) x 235mm(D)
Weight:
1050 gms (plus 170 gms AC adaptor)
Electrical Safety:
Complies with EN61010-1
EMC:
Complies with EN61326