HUMIDITY MODULE. HM1500 Datasheet

HM1500 MODULE. Datasheet pdf. Equivalent

HM1500 Datasheet
Recommendation HM1500 Datasheet
Part HM1500
Description RELATIVE HUMIDITY MODULE
Feature HM1500; TECHNICAL 1 DATA RELATIVE HUMIDITY MODULE HM 1500 Based on the rugged HS1101 capacitive humidity sen.
Manufacture Humirel
Datasheet
Download HM1500 Datasheet




Humirel HM1500
1TECHNICAL DATA
RELATIVE HUMIDITY MODULE
HM 1500
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
G Small size
G Not affected by water immersion
G Full interchangeability
G High reliability and long term stability
G Typical 1 to 4 Volt DC output for 0 to 100 % RH at 5 V DC supply
G Calibrated within +/- 2 % RH @ 55 % RH
G Very low temperature dependence
G Ratiometric to voltage supply within the specified range
G Suitable for 3 to 7 Volts supply voltage
HM 1500
HUMIDITY SENSOR SPECIFIC FEATURES
G Instantaneous de-saturation after long periods in saturation phase.
G Patented solid polymer structure.
G High resistance to chemicals.
G Fast response time.
1
2
MAXIMUM RATINGS
Ratings
Storage Temperature
Symbol
Tstg
Value
-30 to 70
Unit
°C
OPERATING RANGE
100
INTERMITTENT
OPERATION
75
Supply Voltage (Peak)
Vs
7 Vdc
50
Humidity Operating Range RH
Temperature Operating Range Ta
0 to 100
-30 to 60
% RH
°C
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 > 1Motherwise stated)
Characteristics
Symbol
Min.
Typ.
Max.
Unit.
Humidity measuring range
Relative Humidity accuracy (10 to 95 % RH)
Voltage supply
Nominal output @ RH = 55 %
Current consumption
Temperature coefficient (10 to 50 °C )
Averaged Sensitivity from 33% to 75% RH
Sink current capability (RL = 15 k)
Recovery time after 150 hours of condensation
Humidity Hysteresis
Long term stability
Response time (33 to 76 % RH, static, @ 63 %)
Output impedance
RH
RH
Vs
Vout
Ic
Tcc
mV /% RH
Is
t
1
4.75
2.42
τ
Z
+/- 3
5.00
2.48
0.4
+ 0.1
+ 25
10
+/-1.5
0.5
10
70
99 % RH
+/- 5 % RH
5.25 V
2.54 V
0.8 mA
% RH/°C
mV /% RH
300 µA
s
% RH
% RH/yr
s
HPC009 Rev. H October 2001



Humirel HM1500
2TECHNICAL DATA
MEASUREMENT CONDITIONS
G HM1500 is specified for accurate measurements
within 10 to 95% RH.
G Excursion out of this range (< 10% or > 95% RH,
including condensation) does not affect the reliability
of HM1500 characteristics.
G Dedicated HM15XX Product are available for
extreme RH conditions (as HM1520 for low dewpoints)
Consult HUMIREL for further information.
HM 1500 Typical Measuring Ranges in Humidity
4000
3500
HM 1504
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
3500
3000
2500
2000
1500
1000
0
10
20 30
Vout = 25.68 RH + 1079
from 10 to 95 % RH
with Vout in mV and RH in %
40 50
60 70
80 90 100
RH (%)
10
15
20
25
30
35
40
45
50
Vout(mV)
1325
1465
1600
1735
1860
1990
2110
2235
2360
RH (%)
55
60
65
70
75
80
85
90
95
Vout(mV)
2480
2605
2730
2860
2990
3125
3260
3405
3555
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
4
3
2
1
0
-1
-2
-3
-4
-5
-6
0 10
20 30
40 50
60 70
Temperature coefficient compensation
RHCor% = RH% Read * (1 -(Ta -23)* 2.4E-3)
80 90 100
Relative Humidity in % RH
2
1.5
1
0.5
0
-0.5
-1
-1.5
-2
0
10
20 30
40 50
60 70
Relative Humidity in % RH
Non linearity and temperature compensation
RH% = -1.919E-9Vout3 + 1.335E-5Vout2 + 9.607E-3Vout - 21.75
1 + (Ta-23) * 2.4E-3
80 90 100
All equations Vout in mV, RH in %, Ta in °C.
LINEARITY ERROR OF HM1500 MODULE
HPC009 Rev. H October 2001



Humirel HM1500
3TECHNICAL DATA
HUMIDITY MEASUREMENT USING HM1500
Typical HM 1500 relative Humidity measurement
100
80
70
60
50
40
30
20
10
0
1000
1500
% RH = 0.0391 Vout -42.5
from 10 to 95 % RH
with Vout in mV and RH in %
2000
2500
3000
Output Voltage (mV)
3500
4000
Internal block diagram of HM1500
Reference Oscillator
Sensor Oscillator
L.P. Filter
Gain
Vout -->
Suggested applications for HM1500
VCC5
VCC5
VCCIN
U1
3
4
RTCC
MCLR
16
15
OSC1
OSC2/CLK
C2 X1
PIC16CXXX
With A/D
C1
RA/AIN0
RA/AIN1
RA/AIN2
RA/AIN3
RBO
RB1
RB2
RB3
RB4
RB5
RB6
RB7
17
18
1
2
6
7
8
9
10
11
12
1317
VCC5
1 VI 7805 VO 3
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
Send data to display
HPC009 Rev. H October 2001







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