Humirel HM1500 Relative humidity module Datasheet

TECHNICAL 1 DATA
HM 1500
RELATIVE HUMIDITY MODULE
Based on the rugged HS1101 capacitive humidity sensor, HM1500 is a dedicated humidity transducer
designed for OEM applications where a reliable and accurate measurement is needed. Direct interface with a
micro-controller is made possible with the module’s linear voltage output.
MAIN FEATURES
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Small size
Not affected by water immersion
Full interchangeability
High reliability and long term stability
Typical 1 to 4 Volt DC output for 0 to 100 % RH at 5 V DC supply
Calibrated within +/- 2 % RH @ 55 % RH
Very low temperature dependence
Ratiometric to voltage supply within the specified range
Suitable for 3 to 7 Volts supply voltage
HM 1500
HUMIDITY SENSOR SPECIFIC FEATURES
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1
Instantaneous de-saturation after long periods in saturation phase.
Patented solid polymer structure.
High resistance to chemicals.
Fast response time.
OPERATING RANGE
MAXIMUM RATINGS
100
Tstg
-30 to 70
°C
Supply Voltage (Peak)
Vs
7
Vdc
Humidity Operating Range
RH
0 to 100
% RH
Temperature Operating Range Ta
-30 to 60
°C
75
50
E
AT
ST
Storage Temperature
INTERMITTENT
OPERATION
DY
Unit
EA
Value
ST
Symbol
RELATIVE HUMIDITY IN %
Ratings
2
25
Peak conditions : less than 10% of the operational time.
0
-40
-20
0
20
40
60
80
AMBIENT TEMPERATURE IN °C
CHARACTERISTICS
(Ta = 23°C, Vs = 5Vdc, RL
Characteristics
> 1MΩ otherwise stated)
Symbol
Min.
Humidity measuring range
RH
1
Relative Humidity accuracy (10 to 95 % RH)
RH
Voltage supply
Vs
Nominal output @ RH = 55 %
Vout
Current consumption
Ic
Temperature coefficient (10 to 50 °C )
Tcc
Averaged Sensitivity from 33% to 75% RH
∆mV /% RH
Sink current capability (RL = 15 kΩ)
Is
Recovery time after 150 hours of condensation
t
Typ.
Max.
Unit.
99
% RH
+/- 3
+/- 5
% RH
4.75
5.00
5.25
V
2.42
2.48
2.54
V
0.4
0.8
mA
+ 0.1
% RH/°C
+ 25
mV /% RH
300
µA
10
s
Humidity Hysteresis
+/-1.5
% RH
Long term stability
0.5
% RH/yr
Response time (33 to 76 % RH, static, @ 63 %)
τ
10
s
Output impedance
Z
70
Ω
HPC009 Rev. H October 2001
TECHNICAL 2 DATA
MEASUREMENT CONDITIONS
HM 1500 Typical Measuring Ranges in Humidity
● HM1500 is specified for accurate measurements
within 10 to 95% RH.
4000
HM 1504
Output Voltage (mV)
3500
● Excursion out of this range (< 10% or > 95% RH,
including condensation) does not affect the reliability
of HM1500 characteristics.
● Dedicated HM15XX Product are available for
extreme RH conditions (as HM1520 for low dewpoints)
Consult HUMIREL for further information.
3000
METROLOGY
HM 1500 RANGE
2500
2000
1500
METROLOGY
HM 1520 RANGE
1000
0
10
20
30
40
50
60
70
80
90
100
Relative Humidity in %
HM1500 MODELLED LINEAR VOLTAGE OUTPUT (VS = 5V)
REFERENCE OUTPUT VALUES
4000
RH (%) Vout(mV) RH (%) Vout(mV)
1325
10
2480
55
1465
15
2605
60
1600
20
2730
65
1735
25
2860
70
1860
30
2990
75
1990
35
3125
80
2110
40
3260
85
2235
45
3405
90
2360
50
3555
95
Output Voltage (mV)
3500
3000
2500
2000
Vout = 25.68 RH + 1079
from 10 to 95 % RH
1500
with Vout in mV and RH in %
1000
0
10
20
30
40
50
60
70
80
90
100
Relative Humidity in % RH
Reversed Polynomial Equation
Vout = 9E-4RH3 -1.3E-1RH2 + 30.815RH + 1030
ERROR BUDGET AT 23°C
6
HM1500 ERROR LIMITS
5
Delta in % RH
4
3
2
1
0
Temperature coefficient compensation
-1
RHCor% = RH%
-2
Read
* (1 -(Ta -23)* 2.4E-3)
-3
-4
-5
-6
0
10
20
30
40
50
60
70
80
90
100
Relative Humidity in % RH
2
Non linearity and temperature compensation
Delta in % RH
1.5
1
RH% = -1.919E-9Vout3 + 1.335E-5Vout2 + 9.607E-3Vout - 21.75
0.5
1 + (Ta-23) * 2.4E-3
0
-0.5
-1
-1.5
-2
0
10
20
30
40
50
60
70
Relative Humidity in % RH
HPC009 Rev. H October 2001
80
90
100
All equations Vout in mV, RH in %, Ta in °C.
LINEARITY ERROR OF HM1500 MODULE
TECHNICAL 3 DATA
HUMIDITY MEASUREMENT USING HM1500
Typical HM 1500 relative Humidity measurement
100
Relative Humidity (% RH)
80
70
60
50
40
% RH = 0.0391 Vout -42.5
from 10 to 95 % RH
30
20
with Vout in mV and RH in %
10
0
1000
1500
2000
2500
3000
3500
4000
Output Voltage (mV)
Internal block diagram of HM1500
Reference Oscillator
L.P. Filter
Gain
Vout -->
Sensor Oscillator
VCC5
VCC5
U1
3
4
16
15
C2
RA/AIN0
RA/AIN1
RA/AIN2
RA/AIN3
RTCC
MCLR
OSC1
OSC2/CLK
RBO
RB1
RB2
RB3
RB4
RB5
RB6
RB7
X1
C1
PIC16CXXX
With A/D
VCC5
7805
GND
VCCIN
VI
VO
3
6
7
8
9
10
11
12
1317
Steps of 1% RH are
achievable by using
8-bit A/D.
If more resolution is
required a 10 -bit A/D
needs to be used and a
third display will be
added, giving steps of
0.2% RH
Read AINO
Calculate RH%
using equation
or
using alook up table
Convert RH% to
BCD code
2
1
17
18
1
2
HM150X
Suggested applications for HM1500
Send data to display
HPC009 Rev. H October 2001
TECHNICAL 4 DATA
● RESISTANCE TO PHYSICAL AND CHEMICAL STRESSES
- HM1500 has passed through qualification processes of HUMIREL including vibration, shock, storage, high temperature
and humidity, ESD.
- Additional tests under harsh chemical conditions demonstrate good operation in presence of salt atmosphere, SO2 (O.5%),
H2S (0.5%), O3, NOx, NO, CO, CO2, Softener, Soap, Toluene, acids (H2SO4, HNO3, HCl), HMDS, Insecticide, Cigarette
smoke, a non exhaustive list.
- HM1500 is not light sensitive.
● SPECIFIC PRECAUTIONS
- HM1500 is not protected against reversed polarity - Check carefully when connecting the device.
- If you wish to use HM1500 in a chemical atmosphere not listed above, consult us.
A
B
D
PACKAGE
OUTLINE
HM1500
C
Dim
Min (mm)
Max (mm)
A
9.70
10.20
B
5.00
5.50
C
52
54
D
11.2
11.6
E*
200
250
* specific length available on request
E
W1
W2
W3
Wire
Color
Function
W1
White
GROUND
W2
Blue
SUPPLY VOLTAGE
W3
Yellow
OUTPUT VOLTAGE
ORDERING INFORMATION (MULTIPLE PACKAGE QUANTITY OF 10 PIECES).
HM1500 : HUMIDITY ANALOG VOLTAGE OUTPUT MODULE.
SAMPLE KIT OF HM1500
IS AVAILABLE THROUGH
HUMIREL WEB SITE
www.humirel.com
email : [email protected]
The information in this sheet has been carefully reviewed and is believed to be accurate; however, no responsability is assumed for inaccuracies. Furthermore, this information does not convey
to the purchaser of such devices any license under the patent rights to the manufacturer. Humirel reserves the right to make changes without further notice to any product herein. Humirel
makes no warranty, representation or guarantee regarding the suitability of its product for any particular purpose, nor does Humirel assume any liability arising out of the application or use
of any product or circuit and specifically disclaims any and all liability, including without limitation consequential or incidental damages. « Typical » parameters can and do vary in different
applications. All operating parameters, including « Typical » must be validated for each customer applications by customer’s technical experts. Humirel does not convey any license under its
patent rights nor the rights of others. Humirel products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other application intended to support or sustain life, or for any application in which the failure of the Humirel product could create a situation where personal injury or death may occur. Should buyer
purchase or use Humirel products for any such unintended or unauthorized application, Buyer shall indemnify and hold Humirel and its officers, employees, subsidaries, affiliates and distributors harmless against all claims, costs, damages and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of presonal injury or death associated with such unintended or unauthorized use, even if such claim alleges that Humirel was negligent regarding the design or manufacture of the part.Humirel is a registred trade mark of Humirel.
HPC009 Rev. H October 2001
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