Vaisala HMK15 Technical data
HMK15 Humidity Calibrator
three step plugs to fit all
chamber holes (12 mm,
13.5 mm and 18.5 mm)
transit covers
for secure
transportation
and long-term
storage
thermometer with
calibration certificate
In addition to laboratory use, Vaisala Humidity Calibrator HMK15 is suitable for onsite checks of humidity probes and transmitters.
Features/Benefits
Easy and reliable calibration
▪
of humidity probes and
transmitters
Based on saturated salt
▪
solutions
Fast temperature equilibration
▪
No external power required
▪
Suitable for laboratory use
▪
and on-site checks
Chambers and transit covers
▪
make HMK15 easy to transport
Pre-measured certified salts
▪
available
Vaisala Service Centers oer
▪
accredited calibrations for
humidity, temperature and
barometric pressure.
No measuring instrument stays
accurate by itself. It is essential that
the functioning of an instrument
is periodically checked against a
reference. Vaisala has developed the
Vaisala Humidity Calibrator HMK15 to
make calibration and spot checking
of humidity probes and transmitters
easy and reliable.
Method used by
leading laboratories
The operating principle of the
HMK15 is based on the fact that a
saturated salt solution generates a
certain relative humidity in the air
above it. The reading of the humidity
probe or transmitter can then be
adjusted accordingly. Many leading
laboratories use this generally
www.vaisala.com
accepted and reliable method to
calibrate humidity instruments.
Usually two or three different salt
solutions are used. Salts are chosen
according to the application.
Certified salts
The HMK15 can be ordered with
certied and pre-measured salts.
A sample calibration is made from
each batch in Vaisala’s Measurement
Standards Laboratory (MSL).
Calibrated thermometer
The HMK15 can be ordered with
a thermometer, which is used for
measuring the temperature during
the calibration. It can also be used
for checking the temperature
measurement accuracy of the
transmitter. The thermometer can
contain either mercury (accuracy
±0.3 °C (±0.54 °F)) or red capillary
uid (accuracy ±1.0 °C (±1.8 °F)).
FINAS approved
Measurement Standards
Laboratory
Vaisala’s Measurement Standards
Laboratory is a FINAS accredited
calibration laboratory. FINAS is a
member of the EA (the European
Cooperation for Accreditation).
Technical data
General
The standard HMK15 consists of the following parts:
Two salt chambers, chamber covers and transit covers
Base plate
Choice of thermometers
mercury thermometer, Vaisala calibrated,
order code 19728HM
thermometer with red capillary liquid, calibrated by
manufacturer, order code 25130HM
Measurement cup and mixing spoon
Options
Certified and ready
dosed salts:
LiCl salt 11 %RH 19729HM (±1.3% RH)
salt 33 %RH 19730HM (±1.2% RH)
MgCl
2
NaCl salt 75 %RH 19731HM (±1.5% RH)
salt 97 %RH 19732HM (±2.0% RH)
K
2SO4
*Uncertainties given at +20 °C
on exchanged water 19767HM
Extra salt chambers 19766HM
Carrying bag HM27032
Order
code:
Total
uncertainty*:
For more information, visit
www.vaisala.com or contact
us at sales@vaisala.com
Ref. B210908EN-A ©Vaisala 2009
This material is subject to copyright protection, with all
copyrights retained by Vaisala and its individual partners. All
rights reserved. Any logos and/or product names are trademarks
of Vaisala or its individual partners. The reproduction, transfer,
distribution or storage of information contained in this brochure
in any form without the prior written consent of Vaisala is strictly
prohibited. All specifications — technical included — are subject
to change without notice.
Loading...