COMET P3116 Temperature Humidity Transmitter User Guide
- June 13, 2024
- COMET
Table of Contents
Economy humidity and temperature transmitter
QUICK START MANUAL
P3116
DESCRIPTION
The P3116 transmitter with 4-20 mA current outputs is designed to measure
temperature and relative humidity of air using the external probe that is part
of the device. The probe is interchangeable without calibration to a specific
device and regardless of the length of the cable.
The transmitter communicates by two galvanically separated current loops. Each
loop has two-wire connection and each loop requires power from evaluation
device. It is always necessary to connect loop I1, which supplies power to
measurement part of the device.
DEVICE PRODUCT INSTALATION
Devices are designed for wall mounting. There are two mounting holes at the
sides of the case. The transmitter fasten in any position, the recommended
probe working position is with sensor cover downwards.
The connecting terminals are accessible after unscrewing the four screws in
the corners of the case and removing the lid (see figure). Pass the connecting
cable through released gland and connect the wires to terminals (for device
connection it is recommended to use a shielded cable with maximum length of
1200m and with external diameter of 4 to 8 mm). Finally tighten the gland and
screw the lid (check the integrity of the seal). 
The loop resistance value Rc = Rm + resistance of wires must fulfill
the condition Rc[Ω] < 40 x Uss[V] – 360.
The external probe cable can be disconnected and reconnected or replaced. The
connection terminal block is accessible after removing the lid (see figure).
Devices don´t require special operation and maintenance. It is recommended
periodically to verify the accuracy of measurement.
DIMENSIONS
WARNING
- Don´t operate the probe of the device in an environment in a state of condensation or in an environment of water aerosol for a long time.
- Don´t use and don’t store the device probe without a sensor cover.
- Don´t connect transmitter while power supply voltage is on.
- The cables should be located as far as possible from potential interference sources.
- Installation, commissioning and maintenance may only be carried out by personnel with qualification by applicable regulations and standards.
MEASURED VALUES
Temperature:
Measuring range: -20 to +80 °C
Accuracy: ±0.4 °C
Resolution: 0.1 °C
Response time: t90 < 15 min (temperature step 20 ºC)
Relative humidity:
Measuring range: 0 to 100 %RH (no condensation)
Accuracy: ±1.8 %RH from 0 to 90 %RH at 23 °C
Resolution: 0.1 %RH
Temperature error: 0.05 % RH/°C (0 °C to +60 °C)
Response time: t90 < 9 s (humidity step 65 %RH, constant temperature)
GENERAL
Power supply voltage: 9 to 30 Vdc
Current output in case of error: < 3.8 mA or > 22 mA
Recommended calibration interval: 1 year
Protection: transmitter – IP65 external probe – IP40
Working position: transmitter – any position external probe – any
position
Storage temperature range: -20 to +80 °C
Storage humidity range: 5 to 95 %RH (no condensation)
Electromagnetic compatibility: EN 61326-1
Weight: 190 g (1 meter cable), 220 g (2 m), 310 g (5 m)
Housing material: transmitter – ASA, external probe – ABS
OPERATING CONDITIONS
Temperature operating range: transmitter -30 to +80 ºC
external probe -20 to +80 ºC
Relative humidity operating range: transmitter 0 to 100 %RH external
probe 5 to 85 %RH *
- for continuous operation
CALCULATION OF THE MEASURED VALUES
Temperature: T[°C] = 6.25 x I[mA] – 45
Relative humidity: RH[%RH] = 6.25 x I[mA] – 25
END OF OPEATION
Disconnect the device and dispose it according to current legislation for dealing with electronic equipment.
TECHNICAL SUPPORT AND SERVICE
Technical support and service is provided by distributor. For contact see
warranty certificate.
© Copyright: COMET SYSTEM, s.r.o., Bezrucova 2901, 756 61 Roznov pod
Radhostem, Czech Republic It is prohibited to copy and make any changes in
this manual, without explicit agreement of company COMET SYSTEM, Ltd. All
rights reserved.
COMET SYSTEM, Ltd. makes constant development and improvement of their
products. Manufacturer reserves the right to make technical changes to the
device without previous notice. Misprints reserved.
ie-snc-P3116-01
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