Introduction - Observator Instruments DIFF User Manual

OBSERVATOR
instruments

1. Introduction

The DIFF is a tool developed by Observator for
measuring air flow and air temperature. The DIFF
is commonly used by installers and controllers in
the housing and utility industry. The DIFF can
perform a pressure compensated measurement as
specified in the building regulations in the NEN
1087, NEN 8087. The flow meter is also
recommended at the ISSO publications -61, -62, -
63 and -8010 and BRL 6000-10. Operating errors
are prevented by an automated measurement
process. The flow reading is digital and clear, this
prevents reading errors. The DIFF is prepared for data storage with SD card and the use of
DIFFiner. Please contact your dealer or Observator for this option.
The standard package contains:

DIFF automatic volume flow meter with pressure compensation

Battery charger

4 x 1,5V AA NIMH batteries

Manual

Calibration report

transport case
Optionals:
- Upgrade for data storage including PC software (DIFFiner) and 2GB SD card,
- Various attachments
- Fast charger.
Specifications
Description
Dimensions
Net weight
Operating temperature
Range
Accuracy
Resolution display
Resolution Zero
pressure measurer
Power supply
Measuring time (nom.)
Material casing
Measuring method
EMC
Battery life
V11.2 - EN
DIFF automatic volume flow meter
Value
(250x250)x510xØ200mm
2.9 kg with batteries without transport case.
-10 tot +50 ºC, 0-95% RV
10-400 m3/h, -15 tot +70 ºC
±3% of the reading ±1 m3/h, ±0,5ºC.
0,1<100>1 m3/h, 0,1 ºC.
< 0,2 Pa
4x 1,2 V AA NiMH 2700 mAh, rechargeable.
< 30 sec
ABS
In accordance with NEN1087/1088/8088
In accordance with EN60132-1, IEC61000-5-
5 etc
IP20 accordance IEC-60529
8 hour while measuring 75m
Page 4
User manual
Not condensation
3
/h
TDC 16-7-2012