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LPN-H %RH Transmitter Specifications.
Accurate to
Important:
Ambient Temperature Drift
Humidity Sensor -Hysteresis
-Linearity
-Repeatability
-Long Term Drift
LPN-H Temperature Transmitter Specifications.
Accurate to
Linearity and Repeatability
Ambient Temperature Drift
RTD Sensor
Sensor Current
LPN-H Common Specifications.
Output.
Power Supply.
Supply Voltage Sensitivity.
Maximum Output Current.
Output Load Resistance.
EMC Compliances
Isolation Test Voltage
Operating Temperature. -at head
Storage Temperature.
Operating Humidity.
A)
Note:
'at head ' refers to ratings for electronics housed in the connection head.
B)
'at sensor ' refers to ratings for electronics housed in the protective cap.
Note 1. Good airflow and good air mixing must be maintained over the sensor to minimise local temperature fluctuations, and to ensure accurate measurements.
Note 2. The RH sensors quickly recover from condensation or wetting. However, after 24 hours or longer exposures to either high >90%RH or
continuous condensation, an upward shift of 2% to 3%RH may occur. This shift is repeatable and can be reversed by placing the sensor in a low
10%RH environment for a 10 hour period.
CONDENSATION occurs whenever the surface temperature of the sensor's active area drops below the ambient dew point of the surrounding gas.
Condensation forms on the sensor (or any surface) even if the surface temperature only momentarily drops below the ambient dew point. Small
temperature fluctuations near the sensor can unknowingly cause condensation to form when operating at humidity levels above 90%.
While quick to condense, water is slow to evaporate in high humidity conditions. (ie when the surface temperature of the sensor is only slightly above
the ambient dew point.) Because of this, a sensor's recovery from either condensation or wetting is much longer than its normal time response.
During recovery, the sensor outputs a constant 100%RH signal, regardless of the ambient RH.
Product Liability. This information describes our products. It does not constitute guaranteed properties and is not intended to affirm the suitability
of a product for a particular application. Due to ongoing research and development, designs, specifications, and documentation are subject to
change without notification. Regrettably, omissions and exceptions cannot be completely ruled out. No liability will be accepted for errors, omissions
or amendments to this specification. Technical data are always specified by their average values and are based on Standard Calibration Units at
25C, unless otherwise specified. Each product is subject to the 'Conditions of Sale'.
Warning: These products are not designed for use in, and should not be used for patient connected applications. In any critical installation
an independant fail-safe back-up system must always be implemented.
LPN-H-W Dimensions.
69mm
LPN-H-D Dimensions.
±2% FSO Typical. 0~100%RH @ 25C Saturated Salt Calibration.
For continuous measurements of ≥90%RH, refer to note 2 below.
<±0.05%/C FSO Typical.
±0.8% of Span Typical.
±0.5%RH Typical.
±0.5%RH Typical.
±1%RH Typical at 50%RH in 5 years.
<±0.1% FSO Typical.
<±0.1% FSO Typical.
<±0.02%/C FSO Typical.
Pt100 RTD, Class A Din 43760.
0.5mA.
2 wire 4~20mA (Loop Powered).
9~33Vdc.
<±0.01%/V FSO.
Limited to <36mA.
750Ω @ 24Vdc. (50Ω/V Above 9Vdc).
Emissions EN 55022-A. Immunity EN 50082-1, <1% Effect FSO Typ.
Between %RH and Temperature; 50Vdc for 1 min.
A)
0~70C.
-at sensor
B)
-30~85C (LPN-H-D)
-30~85C.
A)
-at head
5~85%RH Max. Non-condensing.
B)
-at sensor
0~100%RH. Refer note 4 below.
=8mm
50mm Nom.
170mm
160mm nom.
LPN-H-F Dimensions.
100
90
4 x 6mm
countersunk holes
PCD = 90mm
50mm Nom.
4.02-2
Grub Screw
M6 x 8
24
40
Mitre for
O-ring
3
12
Intech
INSTRUMENTS LTD
www.intech.co.nz
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